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264 Commits

Author SHA1 Message Date
cfb38f7097 This commit was manufactured by cvs2svn to create branch
'python-v2-dev'.

[SVN r14785]
2002-08-12 13:35:54 +00:00
4ba6a96822 fix test_main signature
[SVN r14783]
2002-08-12 13:22:40 +00:00
1ea4140d56 Added tests for BOOST_NO_STD_ITERATOR_TRAITS
[SVN r14654]
2002-07-31 11:25:25 +00:00
351d4ecb15 Document policies() member of iterator_adaptor
[SVN r14613]
2002-07-26 00:03:24 +00:00
7fbf84dcc6 BaseType -> Base in one more place
[SVN r14605]
2002-07-25 19:10:05 +00:00
3ff49b272d fixup
[SVN r14598]
2002-07-25 14:16:54 +00:00
5b52e3d418 Fix doc based on Beman's feedback
[SVN r14596]
2002-07-25 13:52:48 +00:00
8c0eb498d3 Fix unversioned VC++ checks
[SVN r14436]
2002-07-13 12:26:19 +00:00
48a81ef7ea VC++ fixes
[SVN r14435]
2002-07-13 12:22:51 +00:00
f7610c9b26 fix link
[SVN r14318]
2002-07-05 23:51:20 +00:00
1755eaf019 Merged from RC_1_28_0
[SVN r13944]
2002-05-16 00:56:42 +00:00
6b8b218efb Removed tabs, fixed end of files.
[SVN r13803]
2002-05-10 11:35:38 +00:00
333d79b345 Add index.html so automatic tools work correctly
[SVN r13725]
2002-05-07 19:23:05 +00:00
f0fa436fe4 Added new config macro BOOST_HAS_MS_INT64 to detect presence of __int64 data type.
Modified boost source to use BOOST_HAS_LONG_LONG and BOOST_HAS_MS_INT64
   where appropriate to do so.


[SVN r13714]
2002-05-07 11:24:29 +00:00
13e6d78fa8 Fixes for Borland C++ Builder 6
[SVN r13662]
2002-05-04 11:03:42 +00:00
7126ea2685 Borland C++ Builder 6 fixes
[SVN r13659]
2002-05-04 10:55:15 +00:00
a37518cb4a Fixed broken links.
[SVN r13574]
2002-04-27 11:05:49 +00:00
64b3e8c3bd add missing #include <iterator>
[SVN r13554]
2002-04-23 19:52:11 +00:00
339937380e MSVC fixes.
[SVN r13476]
2002-04-13 13:19:57 +00:00
6156f0d302 Roll addressof() patch back in!
[SVN r13433]
2002-04-10 17:01:35 +00:00
00560e8e17 addressof.hpp:
- Peter Dimov suggested a fix to deal with those evil cv-qualifiers


[SVN r13431]
2002-04-10 14:47:32 +00:00
029ff9828f Roll back addressof() patch temporarily
[SVN r13428]
2002-04-10 09:48:30 +00:00
ec188c7c3e Make local classes nonlocal to silence annoying warnings from Borland C++
[SVN r13418]
2002-04-10 04:00:22 +00:00
0a0296a5d0 ref.hpp:
- Use addressof() instead of & operator


[SVN r13416]
2002-04-10 03:36:17 +00:00
6e26a5bbe7 boost/utility.hpp:
- Include boost/utility/addressof.hpp

boost/utility/addressof.hpp:
  - addressof() implementation

libs/utility/utility.htm:
  - Document addressof

libs/utility/addressof_test.cpp:
  - Test addressof()


[SVN r13414]
2002-04-10 03:31:18 +00:00
dc1b6246a0 boost/ref.hpp:
- Added get_pointer method to return a pointer (instead of a reference)

libs/bind/ref.html:
  - Document get_pointer


[SVN r13322]
2002-03-31 00:24:00 +00:00
15f69eaf14 Fixed new problem with Borland compile -
code clashes with some new type traits workarounds for some reason.


[SVN r13226]
2002-03-19 11:33:00 +00:00
4774a0d325 Added Copyright
[SVN r13145]
2002-03-09 20:34:06 +00:00
be78ab72c9 update expected failures for Sun CC
[SVN r13101]
2002-03-05 20:41:37 +00:00
0bc4a1b20d Warning suppressioni from Craig Rodrigues
[SVN r13098]
2002-03-05 18:55:49 +00:00
c8b674d105 Add missing paren.
[SVN r12997]
2002-03-01 17:43:00 +00:00
b421d4725a Fixed expected failures for gcc 3.1
[SVN r12994]
2002-03-01 12:27:01 +00:00
1662bb5713 use of "small" changed to "small_" to suppress confusion on some compilers
[SVN r12916]
2002-02-24 02:35:19 +00:00
ad79a21abd added portability note about using std::vector's as Base with VC++
[SVN r12875]
2002-02-21 12:09:46 +00:00
19645a52e6 Added a default constructor to shared_count and shared_ptr for incomplete types (void).
[SVN r12815]
2002-02-15 13:31:58 +00:00
74c3077c9a Added test cases for incomplete and abstract base class types.
[SVN r12803]
2002-02-14 12:57:32 +00:00
1f29191329 Modified call_traits to work with incomplete types.
[SVN r12800]
2002-02-14 12:54:57 +00:00
4b636a7680 Always say "private noncopyable" to avoid warnings.
[SVN r12762]
2002-02-08 20:08:15 +00:00
e6fc2555f3 removed tabs
[SVN r12707]
2002-02-04 20:29:35 +00:00
e27d0fcf2a New smart pointer documentation. Related clean-up of the smart pointer
library. Changing includes to include the new individual smart pointer
headers. Replacing old smart pointer library with an include of the new
smart pointer headers. Simplify ifdefs that involve the member templates
macros now that BOOST_MSVC6_MEMBER_TEMPLATES is also guaranteed to bet
set for platforms that have full member templates.


[SVN r12647]
2002-02-02 18:36:12 +00:00
2643c33b20 Doc fixes from Thomas Witt
[SVN r12621]
2002-02-01 13:03:21 +00:00
71af1e77c8 compile-time ref.hpp header test, initial checkin
[SVN r12525]
2002-01-27 13:39:06 +00:00
99e7406bd9 ref_ct_test.cpp
[SVN r12524]
2002-01-27 13:32:37 +00:00
413265f497 compile-time ref.hpp header test, initial checkin
[SVN r12522]
2002-01-27 13:07:20 +00:00
fe44cdf09b made 'reference_wrapper' Assignable
[SVN r12520]
2002-01-27 13:02:27 +00:00
e413428d71 Added tests for the new smart pointers.
[SVN r12500]
2002-01-25 13:54:30 +00:00
88b9822db7 Mark inline to avoid warning with "require prototypes" on.
[SVN r12490]
2002-01-24 19:15:30 +00:00
24045c0cd7 #included <boost/checked_delete.hpp>, removed unnecessary #includes.
[SVN r12488]
2002-01-24 17:47:08 +00:00
d2aa9f4a84 added missing #include of boost/config.hpp
[SVN r12483]
2002-01-24 16:55:41 +00:00
d2a5fd169f initial checkin
[SVN r12481]
2002-01-24 16:52:06 +00:00
4e350d9934 Modified is_reference_wrapper<> to work for reference types.
[SVN r12475]
2002-01-24 13:28:08 +00:00
f3f697bbc8 added is_reference_wrapper<>, unwrap_reference<>
[SVN r12470]
2002-01-23 21:19:14 +00:00
c7c09696db Tweak comments. Include <assert.h> and <boost/current_function.hpp> only
when needed.


[SVN r12446]
2002-01-22 18:28:33 +00:00
dbcc58d984 Smart pointer enhancements, initial commit
[SVN r12439]
2002-01-22 13:38:52 +00:00
8231310c4d initial checkin
[SVN r12390]
2002-01-21 01:29:06 +00:00
2988140430 tabs
[SVN r12360]
2002-01-19 16:07:28 +00:00
7387966005 Stripped tabs from source
[SVN r12351]
2002-01-19 12:38:14 +00:00
e0a5a61375 removed eroneous "detail::" prefix
[SVN r12326]
2002-01-15 19:14:53 +00:00
66ecd70689 removed std:: prefix from slist
[SVN r12310]
2002-01-14 14:57:20 +00:00
67f4f45653 Fixed violation of 'explicit' constructor
[SVN r12256]
2002-01-09 13:15:54 +00:00
1bf28b3de2 Fixes for Borland
[SVN r12254]
2002-01-09 12:11:37 +00:00
eb3c3435d7 Updated expected results
[SVN r12250]
2002-01-08 13:01:15 +00:00
8a81d8b16c Workarounds for MSVC
[SVN r12246]
2002-01-07 19:24:45 +00:00
bc9d8b13d0 converted some of the old terminology (OrderIterator) to the current
terminology (IndexIterator)


[SVN r12164]
2001-12-28 15:49:45 +00:00
4768b167ab Removed obsolete mentions of "less"; Added formalized Policies Concept description
[SVN r12056]
2001-12-14 12:54:21 +00:00
591ff70ed1 many fixes
[SVN r12054]
2001-12-13 19:43:35 +00:00
7bf2ad0b22 VC6 patch
[SVN r12045]
2001-12-13 18:24:29 +00:00
409c79b2e4 fix example (thanks to Michael Stevens)
[SVN r11979]
2001-12-08 08:39:27 +00:00
d0410691a1 removed calls to non-standard std::iota (SGI extension)
[SVN r11904]
2001-12-04 08:02:36 +00:00
64e5115138 Fixed spelling error ing gcc-3.0 bug workaround
[SVN r11888]
2001-12-03 21:48:54 +00:00
7ae912d83c Rolled in Helmut's fixes for random_access_iterable; rolled back
workarounds for that problem.


[SVN r11887]
2001-12-03 21:47:58 +00:00
2937f5876c changed std::iota call (SGI extension) to a manual loop
in permutation_iterator test


[SVN r11869]
2001-12-03 08:35:08 +00:00
8619c9b5c3 fix gcc looping (from Dave Abrahams)
[SVN r11839]
2001-11-30 17:55:39 +00:00
e4d5684f6b added test for permutation_iterator
[SVN r11825]
2001-11-30 11:10:07 +00:00
3d69cf95da added documentation for the permutation_iterator_adaptor
and linked to it from the iterator_adaptors documentation.


[SVN r11824]
2001-11-30 10:40:03 +00:00
18944572b7 committing Daryle and Helmut's changes
[SVN r11813]
2001-11-29 21:22:52 +00:00
3e9d0f80c2 add generator iterator adaptor
[SVN r11736]
2001-11-19 22:11:51 +00:00
a2c4d1990a add boost::generator_iterator_policies and convenience classes
[SVN r11725]
2001-11-18 17:56:43 +00:00
404261c6ee add definition for integral constants initialized in-class
[SVN r11723]
2001-11-18 17:32:19 +00:00
87abc59612 #undef BOOST_REF_CONST added
[SVN r11674]
2001-11-14 14:40:29 +00:00
cb98ddf7db Fixed a bug w/ adaptable function objects + nested binds, made ref<> return const
[SVN r11670]
2001-11-13 13:56:05 +00:00
7d2e6c9025 __stdcall support added.
[SVN r11649]
2001-11-10 19:18:58 +00:00
75eaa14a18 Removed defunct boost::tied (thanks, Daryle Walker)
[SVN r11622]
2001-11-07 10:35:12 +00:00
082d6e3b32 *** empty log message ***
[SVN r11614]
2001-11-06 16:09:14 +00:00
35b3770b6f *** empty log message ***
[SVN r11613]
2001-11-06 16:05:25 +00:00
5b9d20c7e2 *** empty log message ***
[SVN r11611]
2001-11-06 15:52:56 +00:00
5bbed2372e *** empty log message ***
[SVN r11602]
2001-11-05 21:03:59 +00:00
a9d407d239 update SunCC to 6.u2 (C++ 5.3)
[SVN r11601]
2001-11-05 21:00:53 +00:00
3ca4a33a65 updated for named parameters
[SVN r11566]
2001-11-04 16:21:51 +00:00
95197f427c remoeved #if 0
[SVN r11565]
2001-11-04 16:18:10 +00:00
84cdfb032c commit these changes
[SVN r11563]
2001-11-04 04:37:14 +00:00
ec2ceb9c96 no message
[SVN r11508]
2001-11-01 17:22:39 +00:00
6286c893fd Minor regression fixes for Borland and Sunpro tests.
[SVN r11470]
2001-10-30 11:41:35 +00:00
354aef0e8c changed named parameters doc to match new stuff
[SVN r11417]
2001-10-22 17:04:23 +00:00
139e33c36d Updated preprocessor logic to use BOOST_HAS_LONG_LONG
[SVN r11399]
2001-10-18 11:33:52 +00:00
e01de59cdd Made these actually compile
[SVN r11378]
2001-10-12 22:22:42 +00:00
686f822dea Fix spelling error: "occurances" -> "occurrences".
[SVN r11376]
2001-10-11 17:26:04 +00:00
9961d5c9af Last fix had broken preprocessor logic, now fixed.
[SVN r11373]
2001-10-11 12:04:00 +00:00
628be0d125 Fixes for Sunpro C++ 5.3 (code now works!)
[SVN r11368]
2001-10-09 11:24:56 +00:00
633e45f61a Fixed test to work with sunpro 5.3 (omits array specialisation tests)
[SVN r11359]
2001-10-08 11:35:05 +00:00
2f357c3805 Partial fixes for sunpro 5.3 - doesn't actually work yet though
[SVN r11355]
2001-10-08 11:31:29 +00:00
cda0894d0d Fix for sunpro 5.3 (array specialisations don't work)
[SVN r11354]
2001-10-08 11:30:53 +00:00
117720a8bc 1.25.0 Final runup
[SVN r11315]
2001-10-01 15:54:23 +00:00
a6f6c3613a Change comments to make it clear why forward declaration header is required.
[SVN r11314]
2001-10-01 14:15:44 +00:00
7914f5b931 Fixed unused variables that show up as warnings when doing regression
tests.


[SVN r11241]
2001-09-24 23:21:16 +00:00
a1add0a6f6 Intel C++ fixes: Added class copy constructor.
[SVN r11200]
2001-09-22 11:52:56 +00:00
c032b337c4 Fix broken links and other HTML changes related to new config system
[SVN r11142]
2001-09-18 21:24:51 +00:00
ec363261ae remove "explicit" on two- and three-argument constructors to avoid
error on HP aCC


[SVN r11097]
2001-09-11 18:42:25 +00:00
97cde2183d Initial base_from_member commit
[SVN r11086]
2001-09-10 14:04:28 +00:00
7f43c682db Fixed the pair_generator documentation. Order of parameters was wrong; reordered
the table to match the corrected order.


[SVN r11035]
2001-09-05 16:29:29 +00:00
0c9eee3c6b changed note about the move to the tuples library
[SVN r10972]
2001-08-30 19:45:19 +00:00
3b1afa3ba6 changed "empty-member" to "empty base-class"
[SVN r10966]
2001-08-30 10:58:19 +00:00
93e6a75125 changed #include for tie() to tuple.hpp
[SVN r10951]
2001-08-28 19:09:33 +00:00
52f8a7c0ca changed #include for tie()
[SVN r10950]
2001-08-28 19:07:51 +00:00
55bfeb646f removed tie() and class tied
[SVN r10938]
2001-08-26 19:55:49 +00:00
75c9dd3be1 added not about constness of operator* and operator[]
[SVN r10931]
2001-08-24 15:28:20 +00:00
6392e2788f Removed incorrect statics, added const
[SVN r10930]
2001-08-24 12:09:34 +00:00
6a97f3f9ba Tabs converted to spaces.
[SVN r10916]
2001-08-23 19:05:21 +00:00
6e5f52e279 initial commit
[SVN r10914]
2001-08-23 18:42:16 +00:00
7f92bed902 Fix some broken links. Fix order of constructor initializers.
[SVN r10913]
2001-08-23 17:42:07 +00:00
d68a11cc42 Misc; mostly fix links to hard disk locations
[SVN r10902]
2001-08-20 13:04:43 +00:00
328a81e194 Fix broken hyperlink
[SVN r10896]
2001-08-19 15:08:33 +00:00
31d0908b74 Add workaround for BOOST_NO_STDC_NAMESPACE
[SVN r10681]
2001-07-20 21:29:36 +00:00
32c77599f4 Fixes for ICL
[SVN r10613]
2001-07-14 12:51:59 +00:00
812ebf3562 Back out commit made in error
[SVN r10596]
2001-07-12 16:15:30 +00:00
37f476013d Change absolute URL's to relative
[SVN r10594]
2001-07-12 15:31:15 +00:00
9f3104166f output_iterator_helper changes: removed default template parameters, added
support for self-proxying, additional documentation and tests (Aleksey Gurtovoy)


[SVN r10576]
2001-07-09 23:51:49 +00:00
64cc0daf34 Integrate Aleksey's changes
[SVN r10575]
2001-07-09 23:50:55 +00:00
d5d64df124 Fix broken link
[SVN r10553]
2001-07-06 19:19:45 +00:00
0edcfcd5c1 Tuples library causes tie to be deprecated
[SVN r10552]
2001-07-06 19:16:39 +00:00
50ba2d419a Tweeked gcc workaround (gcc 3 still has same problem as gcc 2.9x), added tentative Metrowerks and Intel compiler workarounds.
[SVN r10422]
2001-06-25 11:31:14 +00:00
ff3a77ca5a Fixed problem with VC6 compilers - probably a temporary fix.
[SVN r10361]
2001-06-20 11:43:57 +00:00
4eaed6c23d remove superfluous, illegal "typename" (twice)
[SVN r10314]
2001-06-12 18:50:37 +00:00
4d0dd46471 meant to add as a branch
[SVN r10280]
2001-06-06 19:16:34 +00:00
9c2549bd00 files for the tmpw2001 paper about iterator adaptors
[SVN r10278]
2001-06-06 19:08:51 +00:00
b7c8e0c17f changes from Daryle Walker
[SVN r10264]
2001-06-04 11:57:37 +00:00
dd3cfe1837 removed old arg ordering, use defaults instead
[SVN r10258]
2001-06-03 20:00:24 +00:00
43f525298e Remove compiler workarounds no longer needed due to BOOST_STATIC_ASSERT fix. For stylistic reasons, change sizeof() test to sizeof() != 0
[SVN r10236]
2001-05-28 14:22:30 +00:00
1bb1898ab9 Dave says qualifiers weren't really needed
[SVN r10222]
2001-05-24 19:11:51 +00:00
9578f24be9 Workaround compiler problems while waiting to find out if BOOST_STATIC_ASSERT is broken
[SVN r10218]
2001-05-24 16:02:42 +00:00
46fae3aed2 added check_delete workaround for Sun CC
[SVN r10213]
2001-05-24 09:26:48 +00:00
e35f91a70a Smart pointer and utility changes related to adding checked_delere and checked_array_delete
[SVN r10189]
2001-05-22 18:58:21 +00:00
851052fcca Updated docs - added VC6 bug warning
[SVN r10062]
2001-05-08 11:17:44 +00:00
5ef81b2952 Updated/stricter test program
[SVN r10061]
2001-05-08 11:17:05 +00:00
ef2851c053 Fixes for Sun C++ 5.1
[SVN r10060]
2001-05-08 11:16:35 +00:00
0b4387cff5 reorganised tests to show up VC6 bugs
[SVN r10002]
2001-05-02 10:59:32 +00:00
a40cf11fbf Rewritten compressed_pair regression script to test everything in a more methodical way
[SVN r10000]
2001-05-01 11:17:02 +00:00
5c495cd223 Change all eGroups references to YahooGroups
[SVN r9979]
2001-04-25 00:24:50 +00:00
cf1296dff8 added stuff about Default Constructible needed for the function object
[SVN r9683]
2001-03-29 16:26:42 +00:00
d6d88db6e8 std::bind1st -> boost::bind1st
[SVN r9682]
2001-03-29 16:19:34 +00:00
85c2a35257 std::binder1st -> boost::binder1st
[SVN r9681]
2001-03-29 16:18:41 +00:00
836d8b1c64 added spaces in name
[SVN r9673]
2001-03-29 04:08:38 +00:00
98d8c8ab71 fixed broken link
[SVN r9645]
2001-03-27 10:54:12 +00:00
db45013339 fixed sgi stl link
[SVN r9631]
2001-03-22 16:06:15 +00:00
a55c37e7f6 fixed sgi stl links
[SVN r9630]
2001-03-22 16:05:48 +00:00
46a270fcca fixed link to sgi stl
[SVN r9629]
2001-03-22 16:02:11 +00:00
967856518e updated link to sgi stl
[SVN r9628]
2001-03-22 16:01:18 +00:00
7f93e739fe added documentation for initialize() policy function
[SVN r9592]
2001-03-19 21:46:14 +00:00
2cd1422514 added comment about abstract base classes as value_type
[SVN r9584]
2001-03-19 17:31:27 +00:00
feb370b201 1.21.0 run up including fixing broken links
[SVN r9523]
2001-03-09 14:36:41 +00:00
d1b34e64d8 Fixes for validator.w3.org
[SVN r9518]
2001-03-09 03:28:13 +00:00
b9a1eead40 Mostly clarification. Fix: changed "category" to "iterator_category" in one place.
[SVN r9517]
2001-03-09 03:10:32 +00:00
1e4bfac98c added named template parameter to table of contents
[SVN r9510]
2001-03-08 21:36:09 +00:00
3bb504fbf3 added revision history line
[SVN r9506]
2001-03-08 20:50:14 +00:00
5029791c90 split off indirect and transform tests into separate files
[SVN r9505]
2001-03-08 20:49:05 +00:00
a1a68f0970 1.21.0 run up
[SVN r9502]
2001-03-08 20:35:52 +00:00
f8543d79eb added more static asserts
[SVN r9500]
2001-03-08 20:02:00 +00:00
f353415136 added docs for iterator_traits_generator
[SVN r9498]
2001-03-08 19:19:46 +00:00
26240403b0 added a test to make sure that the type set by the generator is really the
type used


[SVN r9497]
2001-03-08 19:04:29 +00:00
3a39729b58 new file
[SVN r9488]
2001-03-08 16:33:40 +00:00
096c961d9a Patches for Intel C++
[SVN r9425]
2001-03-04 16:08:20 +00:00
01fe04a6a2 Workaround for Borland
[SVN r9424]
2001-03-04 16:07:11 +00:00
7ea4014993 Misc fixes that missed the last commit..
[SVN r9402]
2001-03-04 11:08:29 +00:00
d50b374f88 Boost Test Library initial commit
[SVN r9364]
2001-02-28 21:39:56 +00:00
27dfb25570 added function output iterator adaptor
[SVN r9351]
2001-02-27 05:50:51 +00:00
b5ed77985e added missing typename's to docs
[SVN r9324]
2001-02-25 12:04:48 +00:00
61243bd15f type_traits: more tentative EDG compiler fixes...
[SVN r9321]
2001-02-24 13:04:56 +00:00
368b94d804 Corrected numeric_limits<>::is_integral -> numeric_limits<>::is_integer
[SVN r9299]
2001-02-20 23:15:29 +00:00
a5adbbfd5f use filter_iter::policies_type instead of filter_gen::policies_type
[SVN r9292]
2001-02-20 16:01:00 +00:00
a19d13f123 More type_traits tweeks.
[SVN r9287]
2001-02-20 12:17:55 +00:00
78886ab383 Added cross-reference; improved policies documentation
[SVN r9286]
2001-02-20 03:49:26 +00:00
168012b465 Describe const/mutable interactions and give rationale for no
reverse_iterator_pair_generator.


[SVN r9285]
2001-02-20 03:04:03 +00:00
d9d58ea66e Take advantage of improved iterator_traits to do more tests on MSVC. Reordered
some #ifdefs for coherency.


[SVN r9281]
2001-02-19 22:36:22 +00:00
56f5f6e8d5 Take adavantage of improved iterator_traits to do more tests on MSVC. Hack
around an MSVC-with-STLport internal compiler error.


[SVN r9280]
2001-02-19 22:34:31 +00:00
3cb6420eda Roll back the reverse_iterator_pair_generator test
[SVN r9278]
2001-02-19 20:37:24 +00:00
60be2c1186 Added tests for reverse_iterator_pair_generator
[SVN r9273]
2001-02-19 16:21:12 +00:00
ed210f6b2c more type traits updates:
Header includes get BOOST_ prefix,
BOOST_DECL_MC dropped in favour of new BOOST_STATIC_CONSTANT (from config.hpp),
operator ! dropped in favour of boost::type_traits::ice_not template.


[SVN r9270]
2001-02-19 12:52:30 +00:00
029bc59d74 Added some missing 'explicit's
[SVN r9265]
2001-02-18 22:23:13 +00:00
961c08a82f Apply Jens' suggested fixes
[SVN r9263]
2001-02-18 21:50:57 +00:00
7ee484c614 fix minor typos
[SVN r9259]
2001-02-18 19:26:20 +00:00
05c6fbbf99 needs <boost/type_traits/same_traits.hpp>
[SVN r9253]
2001-02-18 15:19:23 +00:00
91078b7f7a type_traits: regression failure fixes from type traits changes...
[SVN r9249]
2001-02-18 11:43:01 +00:00
20d804afc4 changes to order of indirect_iterator template parameter list, and
fixed a typo


[SVN r9247]
2001-02-17 22:03:30 +00:00
c21f6d1cbf added Category parameter and made a few more edits with regards to type requirements
[SVN r9239]
2001-02-17 19:59:19 +00:00
393e79c1fd Added new type traits files.
[SVN r9238]
2001-02-17 12:25:45 +00:00
8b92c8a085 adjusted requirements for value type of the base iterator
[SVN r9236]
2001-02-17 01:51:45 +00:00
ff73dd94c9 made iterator_adaptor constructor explicit
[SVN r9235]
2001-02-17 01:50:40 +00:00
af43904f38 added "explicit" to iterator_adaptor constructor
[SVN r9234]
2001-02-17 01:44:41 +00:00
485074f265 Added a missing const. Made the tests run (somewhat) with plain MSVC again.
[SVN r9232]
2001-02-16 23:04:49 +00:00
2e0ee55b5e add missing my_int3::operator!=
[SVN r9231]
2001-02-16 21:28:59 +00:00
e9105d32cb background color and a whitespace edit
[SVN r9228]
2001-02-16 16:38:45 +00:00
964d23f68c Edits for clarity
[SVN r9224]
2001-02-16 05:51:37 +00:00
be5aaaae7b More edits for clarity. Added const/non-const example.
[SVN r9223]
2001-02-16 05:33:21 +00:00
bf13bd7b3f Massive edits
[SVN r9222]
2001-02-16 05:30:49 +00:00
352e392fcb Checked and cleaned using HTML TIDY.
[SVN r9220]
2001-02-16 02:36:36 +00:00
083b1b02df Bigtime edits
[SVN r9219]
2001-02-16 00:38:28 +00:00
648c6240a2 added another link to the generic_programming.html#policies
[SVN r9218]
2001-02-15 16:57:12 +00:00
60cab840cb removed strange ssh garbage
[SVN r9217]
2001-02-15 16:52:39 +00:00
83a4380dab added mention of traits requirement under Type Requirements section
[SVN r9216]
2001-02-15 16:49:16 +00:00
de84fe8d98 oops, meant to remove use of policies_type from filter_iterator_generator
in the last commit, but accidentally added it :(


[SVN r9215]
2001-02-15 16:43:54 +00:00
ed3cbfdb8e removed policies_type from filter_iterator_generator
[SVN r9214]
2001-02-15 16:41:48 +00:00
fda44ca17d General edits for clarity; some reorganization.
[SVN r9213]
2001-02-15 16:39:55 +00:00
272025bb07 fixed my_int::operator--
[SVN r9208]
2001-02-15 06:47:06 +00:00
8e92bcf1b2 removed policies_type from filter_iterator_generator
[SVN r9207]
2001-02-15 06:44:26 +00:00
84f1ffdefe added section on Members to cover constructors, etc. and added
a section on Operators


[SVN r9206]
2001-02-15 06:41:46 +00:00
7e25450054 added discusion of counting_iterator_traits, and added type requirements
for the Incrementable type.

added uses of user-defined types to the test


[SVN r9204]
2001-02-15 05:53:10 +00:00
4a563fa266 added missing boost::
[SVN r9199]
2001-02-14 20:35:39 +00:00
aa4c0ec000 Test new VC6 workarounds
[SVN r9198]
2001-02-13 23:32:19 +00:00
e1ecfbdc43 added output for the transform iterator example
[SVN r9187]
2001-02-13 04:38:59 +00:00
a4e122a82e changed template class to class template
[SVN r9186]
2001-02-13 04:34:44 +00:00
93216e8fb7 copyright
[SVN r9184]
2001-02-13 04:25:24 +00:00
16272c210d fixed typo
[SVN r9183]
2001-02-13 04:24:24 +00:00
e104b00da1 merged in Dave's additions and added a tutorial using the implementation
of transform iterator as the example


[SVN r9182]
2001-02-13 04:15:17 +00:00
ce5c6bcc08 removed use of istream_iterator for operator-> test, replaced with
use of concept archetypes


[SVN r9180]
2001-02-13 02:03:13 +00:00
8694ce31fe changed int* to std::vector<int>::iterator
[SVN r9178]
2001-02-12 21:59:25 +00:00
d960e5eadd added another example
[SVN r9177]
2001-02-12 21:57:19 +00:00
2dc71e87a3 new files
[SVN r9176]
2001-02-12 21:35:20 +00:00
6bf17edde2 updated url to the iterator_adaptor class
[SVN r9156]
2001-02-12 05:24:45 +00:00
88573d515d fixed Reference and Pointer template paremeter descriptions
[SVN r9155]
2001-02-12 05:20:09 +00:00
89b9f77823 obsolete and not needed
[SVN r9152]
2001-02-12 04:55:19 +00:00
765d9be17d small edit
[SVN r9151]
2001-02-12 04:53:39 +00:00
7135373008 various edits
[SVN r9150]
2001-02-12 04:52:24 +00:00
ee269884fc finished 1st draft of reverse iterator docs
[SVN r9149]
2001-02-12 04:51:56 +00:00
387540d5f1 using make_const_projection_iterator() for last example,
and a couple other minor edits


[SVN r9145]
2001-02-12 02:55:19 +00:00
2eba7b42a8 new files
[SVN r9144]
2001-02-12 02:52:26 +00:00
07115d26c7 finished 1st draft
[SVN r9143]
2001-02-12 01:50:50 +00:00
c43ed815a0 new files
[SVN r9137]
2001-02-11 20:05:00 +00:00
ff01e36d12 Compile with Borland, re-enable failing tests
[SVN r9136]
2001-02-11 19:53:56 +00:00
ac4798b16c Final fixes for Borland
[SVN r9135]
2001-02-11 19:50:14 +00:00
d4e14fed0e Fixed bugs in the iterator helpers which prevented explicitly supplied arguments from actually being used
[SVN r9128]
2001-02-11 19:31:21 +00:00
5f91259344 few edits
[SVN r9125]
2001-02-11 19:26:26 +00:00
20a9d9645d Added test of operator-> for forward and input iterators.
[SVN r9124]
2001-02-11 19:25:49 +00:00
c86f6b4abd Dave's suggested edits
[SVN r9122]
2001-02-11 18:27:40 +00:00
d66489b5b2 changed per Dave's comments
[SVN r9121]
2001-02-11 18:14:04 +00:00
b743ee9f0c #if 0'd out use of counting_iterator on non-numeric types in MSVC without STLport, so that the other tests may proceed
[SVN r9120]
2001-02-11 16:19:17 +00:00
95ba69c00a Borland fixes
[SVN r9119]
2001-02-11 16:16:53 +00:00
2ac273739c Update for compatibility with new iterator_adaptor interface
[SVN r9118]
2001-02-11 16:14:14 +00:00
5b4d28708c Fixes for Borland
[SVN r9117]
2001-02-11 16:13:38 +00:00
4cc4383488 Some fixes for Borland get it closer on that compiler
[SVN r9112]
2001-02-11 16:05:01 +00:00
8935232248 new files
[SVN r9109]
2001-02-11 05:25:19 +00:00
5c6dd2f172 various edits
[SVN r9108]
2001-02-11 04:34:32 +00:00
eeeb7ef5b9 Replaced some static_casts with explicit construction
[SVN r9107]
2001-02-11 03:12:04 +00:00
2efc9c1178 Use new adaptors interface
[SVN r9105]
2001-02-11 03:07:55 +00:00
a84c46f6e3 added another example
[SVN r9103]
2001-02-11 03:01:47 +00:00
a5c3dcdd02 redid docs for the template parameters
[SVN r9102]
2001-02-11 02:55:38 +00:00
46f7a75eb7 fixed bug in policy object constructor
[SVN r9101]
2001-02-11 02:40:02 +00:00
94b6710c5b fixed bug in policy object construction
[SVN r9100]
2001-02-11 02:39:35 +00:00
d8dd3da9ab small edit
[SVN r9099]
2001-02-11 02:38:08 +00:00
803ced004a finished 1st draft
[SVN r9098]
2001-02-11 02:35:09 +00:00
0ea7d36ad0 A fix for EDG
[SVN r9096]
2001-02-10 23:16:05 +00:00
87aafab759 new file
[SVN r9094]
2001-02-10 22:33:43 +00:00
994d310abd Use new filter_ interface.
[SVN r9090]
2001-02-10 20:11:42 +00:00
228cdcf05e All final 1.20.2 changes, including fixing broken hyperlinks
[SVN r9071]
2001-02-10 14:42:14 +00:00
42598e352c Use new reverse_ and indirect_ interfaces. Replace BOOST_NO_STD_ITERATOR_TRAITS
with BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION to prove we've normalized to core
compiler capabilities


[SVN r9067]
2001-02-10 00:38:08 +00:00
75 changed files with 10072 additions and 4569 deletions

View File

@ -100,7 +100,7 @@ Assignment
</UL>
<h3>See also</h3>
<a href="http://www.sgi.com/Technology/STL/DefaultConstructible.html">DefaultConstructible</A>
<a href="http://www.sgi.com/tech/stl/DefaultConstructible.html">DefaultConstructible</A>
and
<A href="./CopyConstructible.html">CopyConstructible</A>

View File

@ -11,7 +11,7 @@
-- purpose. It is provided "as is" without express or implied warranty.
-->
<Head>
<Title>CopyConstructible</Title>
<Title>Copy Constructible</Title>
</HEAD>
<BODY BGCOLOR="#ffffff" LINK="#0000ee" TEXT="#000000" VLINK="#551a8b"
ALINK="#ff0000">
@ -19,10 +19,10 @@
ALT="C++ Boost" width="277" height="86">
<!--end header-->
<BR Clear>
<H1>CopyConstructible</H1>
<H1>Copy Constructible</H1>
<h3>Description</h3>
A type is CopyConstructible if it is possible to copy objects of that
A type is Copy Constructible if it is possible to copy objects of that
type.
<h3>Notation</h3>
@ -32,7 +32,7 @@ type.
<tt>T</tt>
</TD>
<TD VAlign=top>
is type that is a model of CopyConstructible
is type that is a model of Copy Constructible
</TD>
</TR>
@ -194,9 +194,9 @@ denotes the address of <tt>u</tt>
<h3>See also</h3>
<A
href="http://www.sgi.com/Technology/STL/DefaultConstructible.html">DefaultConstructible</A>
href="http://www.sgi.com/tech/stl/DefaultConstructible.html">Default Constructible</A>
and
<A href="http://www.sgi.com/Technology/STL/Assignable.html">Assignable</A>
<A hrefa="./Assignable.html">Assignable</A>
<br>
<HR>

View File

@ -196,7 +196,7 @@ satisfies the definition of a <i>partial ordering</i>. The definition of
a <i>strict weak ordering</i> is stricter, and the definition of a
<i>total ordering</i> is stricter still.
<h3>See also</h3>
<A href="http://www.sgi.com/Technology/STL/EqualityComparable.html">EqualityComparable</A>, <A href="http://www.sgi.com/Technology/STL/StrictWeakOrdering.html">StrictWeakOrdering</A>
<A href="http://www.sgi.com/tech/stl/EqualityComparable.html">EqualityComparable</A>, <A href="http://www.sgi.com/tech/stl/StrictWeakOrdering.html">StrictWeakOrdering</A>

View File

@ -21,21 +21,21 @@
<H2>
<A NAME="concept:MultiPassInputIterator"></A>
MultiPassInputIterator
Multi-Pass Input Iterator
</H2>
This concept is a refinement of <a
href="http://www.sgi.com/Technology/STL/InputIterator.html">InputIterator</a>,
href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>,
adding the requirements that the iterator can be used to make multiple
passes through a range, and that if <TT>it1 == it2</TT> and
<TT>it1</TT> is dereferenceable then <TT>++it1 == ++it2</TT>. The
MultiPassInputIterator is very similar to the <a
href="http://www.sgi.com/Technology/STL/ForwardIterator.hmtl">ForwardIterator</a>. The
Multi-Pass Input Iterator is very similar to the <a
href="http://www.sgi.com/tech/stl/ForwardIterator.hmtl">Forward Iterator</a>. The
only difference is that a <a
href="http://www.sgi.com/Technology/STL/ForwardIterator.hmtl">ForwardIterator</a>
href="http://www.sgi.com/tech/stl/ForwardIterator.hmtl">Forward Iterator</a>
requires the <TT>reference</TT> type to be <TT>value_type&amp;</TT>, whereas
MultiPassInputIterator is like <a
href="http://www.sgi.com/Technology/STL/InputIterator.html">InputIterator</a>
href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>
in that the <TT>reference</TT> type merely has to be convertible to
<TT>value_type</TT>.
@ -44,29 +44,29 @@ in that the <TT>reference</TT> type merely has to be convertible to
comments by Valentin Bonnard:
<p> I think that introducing MultiPassInputIterator isn't the right
solution. Do you also want to define MultiPassBidirectionnalIterator
and MultiPassRandomAccessIterator ? I don't, definitly. It only
<p> I think that introducing Multi-Pass Input Iterator isn't the right
solution. Do you also want to define Multi-Pass Bidirectionnal Iterator
and Multi-Pass Random Access Iterator ? I don't, definitly. It only
confuses the issue. The problem lies into the existing hierarchy of
iterators, which mixes movabillity, modifiabillity and lvalue-ness,
and these are clearly independant.
<p> The terms Forward, Bidirectionnal and RandomAccess are about
<p> The terms Forward, Bidirectionnal and Random Access are about
movabillity and shouldn't be used to mean anything else. In a
completly orthogonal way, iterators can be immutable, mutable, or
neither. Lvalueness of iterators is also orthogonal with
immutabillity. With these clean concepts, your MultiPassInputIterator
is just called a ForwardIterator.
immutabillity. With these clean concepts, your Multi-Pass Input Iterator
is just called a Forward Iterator.
<p>
Other translations are:<br>
std::ForwardIterator -> ForwardIterator & LvalueIterator<br>
std::BidirectionnalIterator -> BidirectionnalIterator & LvalueIterator<br>
std::RandomAccessIterator -> RandomAccessIterator & LvalueIterator<br>
std::Forward Iterator -> ForwardIterator & Lvalue Iterator<br>
std::Bidirectionnal Iterator -> Bidirectionnal Iterator & Lvalue Iterator<br>
std::Random Access Iterator -> Random Access Iterator & Lvalue Iterator<br>
<p>
Note that in practice the only operation not allowed on my
ForwardIterator which is allowed on std::ForwardIterator is
Forward Iterator which is allowed on std::Forward Iterator is
<tt>&*it</tt>. I think that <tt>&*</tt> is rarely needed in generic code.
<p>
@ -75,9 +75,9 @@ reply by Jeremy Siek:
<p>
The above analysis by Valentin is right on. Of course, there is
the problem with backward compatibility. The current STL implementations
are based on the old definition of ForwardIterator. The right course
of action is to get ForwardIterator, etc. changed in the C++ standard.
Once that is done we can drop MultiPassInputIterator.
are based on the old definition of Forward Iterator. The right course
of action is to get Forward Iterator, etc. changed in the C++ standard.
Once that is done we can drop Multi-Pass Input Iterator.
<br>
@ -85,7 +85,7 @@ Once that is done we can drop MultiPassInputIterator.
<TABLE>
<TR valign=top>
<TD nowrap>Copyright &copy 2000</TD><TD>
<A HREF=http://www.boost.org/people/jeremy_siek.htm>Jeremy Siek</A>, Univ.of Notre Dame (<A HREF="mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</A>)
<a HREF="../../people/jeremy_siek.htm">Jeremy Siek</a>, Univ.of Notre Dame (<A HREF="mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</A>)
</TD></TR></TABLE>
</BODY>

46
addressof_test.cpp Normal file
View File

@ -0,0 +1,46 @@
// Copyright (C) 2002 Brad King (brad.king@kitware.com)
// Doug Gregor (gregod@cs.rpi.edu)
//
// Permission to copy, use, sell and distribute this software is granted
// provided this copyright notice appears in all copies.
// Permission to modify the code and to distribute modified code is granted
// provided this copyright notice appears in all copies, and a notice
// that the code was modified is included with the copyright notice.
//
// This software is provided "as is" without express or implied warranty,
// and with no claim as to its suitability for any purpose.
// For more information, see http://www.boost.org
#define BOOST_INCLUDE_MAIN
#include <boost/test/test_tools.hpp>
#include <boost/utility.hpp>
struct useless_type {};
class nonaddressable {
public:
void dummy(); // Silence GCC warning: all member of class are private
private:
useless_type operator&() const;
};
int test_main(int, char*[])
{
nonaddressable* px = new nonaddressable();
nonaddressable& x = *px;
BOOST_TEST(boost::addressof(x) == px);
const nonaddressable& cx = *px;
BOOST_TEST(boost::addressof(cx) == static_cast<const nonaddressable*>(px));
volatile nonaddressable& vx = *px;
BOOST_TEST(boost::addressof(vx) == static_cast<volatile nonaddressable*>(px));
const volatile nonaddressable& cvx = *px;
BOOST_TEST(boost::addressof(cvx) == static_cast<const volatile nonaddressable*>(px));
return 0;
}

View File

@ -1,424 +0,0 @@
/*
*
* Copyright (c) 1999
* Dr John Maddock
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Dr John Maddock makes no representations
* about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* This file provides some example of type_traits usage -
* by "optimising" various algorithms:
*
* opt::copy - optimised for trivial copy (cf std::copy)
* opt::fill - optimised for trivial copy/small types (cf std::fill)
* opt::destroy_array - an example of optimisation based upon omitted destructor calls
* opt::iter_swap - uses type_traits to determine whether the iterator is a proxy
* in which case it uses a "safe" approach, otherwise calls swap
* on the assumption that swap may be specialised for the pointed-to type.
*
*/
/* Release notes:
23rd July 2000:
Added explicit failure for broken compilers that don't support these examples.
Fixed broken gcc support (broken using directive).
Reordered tests slightly.
*/
#include <iostream>
#include <typeinfo>
#include <algorithm>
#include <iterator>
#include <vector>
#include <memory>
#include <boost/timer.hpp>
#include <boost/type_traits.hpp>
#include <boost/call_traits.hpp>
using std::cout;
using std::endl;
using std::cin;
#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
#error "Sorry, without template partial specialisation support there isn't anything to test here..."
#endif
namespace opt{
//
// algorithm destroy_array:
// The reverse of std::unitialized_copy, takes a block of
// unitialized memory and calls destructors on all objects therein.
//
namespace detail{
template <bool>
struct array_destroyer
{
template <class T>
static void destroy_array(T* i, T* j){ do_destroy_array(i, j); }
};
template <>
struct array_destroyer<true>
{
template <class T>
static void destroy_array(T*, T*){}
};
template <class T>
void do_destroy_array(T* first, T* last)
{
while(first != last)
{
first->~T();
++first;
}
}
}; // namespace detail
template <class T>
inline void destroy_array(T* p1, T* p2)
{
detail::array_destroyer<boost::has_trivial_destructor<T>::value>::destroy_array(p1, p2);
}
//
// unoptimised versions of destroy_array:
//
template <class T>
void destroy_array1(T* first, T* last)
{
while(first != last)
{
first->~T();
++first;
}
}
template <class T>
void destroy_array2(T* first, T* last)
{
for(; first != last; ++first) first->~T();
}
//
// opt::copy
// same semantics as std::copy
// calls memcpy where appropiate.
//
namespace detail{
template <bool b>
struct copier
{
template<typename I1, typename I2>
static I2 do_copy(I1 first, I1 last, I2 out);
};
template <bool b>
template<typename I1, typename I2>
I2 copier<b>::do_copy(I1 first, I1 last, I2 out)
{
while(first != last)
{
*out = *first;
++out;
++first;
}
return out;
}
template <>
struct copier<true>
{
template<typename I1, typename I2>
static I2* do_copy(I1* first, I1* last, I2* out)
{
memcpy(out, first, (last-first)*sizeof(I2));
return out+(last-first);
}
};
}
template<typename I1, typename I2>
inline I2 copy(I1 first, I1 last, I2 out)
{
typedef typename boost::remove_cv<typename std::iterator_traits<I1>::value_type>::type v1_t;
typedef typename boost::remove_cv<typename std::iterator_traits<I2>::value_type>::type v2_t;
enum{ can_opt = boost::is_same<v1_t, v2_t>::value
&& boost::is_pointer<I1>::value
&& boost::is_pointer<I2>::value
&& boost::has_trivial_assign<v1_t>::value };
return detail::copier<can_opt>::do_copy(first, last, out);
}
//
// fill
// same as std::fill, uses memset where appropriate, along with call_traits
// to "optimise" parameter passing.
//
namespace detail{
template <bool opt>
struct filler
{
template <typename I, typename T>
static void do_fill(I first, I last, typename boost::call_traits<T>::param_type val);
};
template <bool b>
template <typename I, typename T>
void filler<b>::do_fill(I first, I last, typename boost::call_traits<T>::param_type val)
{
while(first != last)
{
*first = val;
++first;
}
}
template <>
struct filler<true>
{
template <typename I, typename T>
static void do_fill(I first, I last, T val)
{
std::memset(first, val, last-first);
}
};
}
template <class I, class T>
inline void fill(I first, I last, const T& val)
{
enum{ can_opt = boost::is_pointer<I>::value
&& boost::is_arithmetic<T>::value
&& (sizeof(T) == 1) };
typedef detail::filler<can_opt> filler_t;
filler_t::template do_fill<I,T>(first, last, val);
}
//
// iter_swap:
// tests whether iterator is a proxying iterator or not, and
// uses optimal form accordingly:
//
namespace detail{
template <bool b>
struct swapper
{
template <typename I>
static void do_swap(I one, I two)
{
typedef typename std::iterator_traits<I>::value_type v_t;
v_t v = *one;
*one = *two;
*two = v;
}
};
#ifdef __GNUC__
using std::swap;
#endif
template <>
struct swapper<true>
{
template <typename I>
static void do_swap(I one, I two)
{
using std::swap;
swap(*one, *two);
}
};
}
template <typename I1, typename I2>
inline void iter_swap(I1 one, I2 two)
{
typedef typename std::iterator_traits<I1>::reference r1_t;
typedef typename std::iterator_traits<I2>::reference r2_t;
enum{ can_opt = boost::is_reference<r1_t>::value && boost::is_reference<r2_t>::value && boost::is_same<r1_t, r2_t>::value };
detail::swapper<can_opt>::do_swap(one, two);
}
}; // namespace opt
//
// define some global data:
//
const int array_size = 1000;
int i_array[array_size] = {0,};
const int ci_array[array_size] = {0,};
char c_array[array_size] = {0,};
const char cc_array[array_size] = { 0,};
const int iter_count = 1000000;
int main()
{
//
// test destroy_array,
// compare destruction time of an array of ints
// with unoptimised form.
//
cout << "Measuring times in micro-seconds per 1000 elements processed" << endl << endl;
cout << "testing destroy_array...\n"
"[Some compilers may be able to optimise the \"unoptimised\"\n versions as well as type_traits does.]" << endl;
/*cache load*/ opt::destroy_array(i_array, i_array + array_size);
boost::timer t;
double result;
int i;
for(i = 0; i < iter_count; ++i)
{
opt::destroy_array(i_array, i_array + array_size);
}
result = t.elapsed();
cout << "destroy_array<int>: " << result << endl;
/*cache load*/ opt::destroy_array1(i_array, i_array + array_size);
t.restart();
for(i = 0; i < iter_count; ++i)
{
opt::destroy_array1(i_array, i_array + array_size);
}
result = t.elapsed();
cout << "destroy_array<int>(unoptimised#1): " << result << endl;
/*cache load*/ opt::destroy_array2(i_array, i_array + array_size);
t.restart();
for(i = 0; i < iter_count; ++i)
{
opt::destroy_array2(i_array, i_array + array_size);
}
result = t.elapsed();
cout << "destroy_array<int>(unoptimised#2): " << result << endl << endl;
cout << "testing fill(char)...\n"
"[Some standard library versions may already perform this optimisation.]" << endl;
/*cache load*/ opt::fill<char*, char>(c_array, c_array + array_size, (char)3);
t.restart();
for(i = 0; i < iter_count; ++i)
{
opt::fill<char*, char>(c_array, c_array + array_size, (char)3);
}
result = t.elapsed();
cout << "opt::fill<char*, char>: " << result << endl;
/*cache load*/ std::fill(c_array, c_array + array_size, (char)3);
t.restart();
for(i = 0; i < iter_count; ++i)
{
std::fill(c_array, c_array + array_size, (char)3);
}
result = t.elapsed();
cout << "std::fill<char*, char>: " << result << endl << endl;
cout << "testing fill(int)...\n"
"[Tests the effect of call_traits pass-by-value optimisation -\nthe value of this optimisation may depend upon hardware characteristics.]" << endl;
/*cache load*/ opt::fill<int*, int>(i_array, i_array + array_size, 3);
t.restart();
for(i = 0; i < iter_count; ++i)
{
opt::fill<int*, int>(i_array, i_array + array_size, 3);
}
result = t.elapsed();
cout << "opt::fill<int*, int>: " << result << endl;
/*cache load*/ std::fill(i_array, i_array + array_size, 3);
t.restart();
for(i = 0; i < iter_count; ++i)
{
std::fill(i_array, i_array + array_size, 3);
}
result = t.elapsed();
cout << "std::fill<int*, int>: " << result << endl << endl;
cout << "testing copy...\n"
"[Some standard library versions may already perform this optimisation.]" << endl;
/*cache load*/ opt::copy<const int*, int*>(ci_array, ci_array + array_size, i_array);
t.restart();
for(i = 0; i < iter_count; ++i)
{
opt::copy<const int*, int*>(ci_array, ci_array + array_size, i_array);
}
result = t.elapsed();
cout << "opt::copy<const int*, int*>: " << result << endl;
/*cache load*/ std::copy<const int*, int*>(ci_array, ci_array + array_size, i_array);
t.restart();
for(i = 0; i < iter_count; ++i)
{
std::copy<const int*, int*>(ci_array, ci_array + array_size, i_array);
}
result = t.elapsed();
cout << "std::copy<const int*, int*>: " << result << endl;
/*cache load*/ opt::detail::copier<false>::template do_copy<const int*, int*>(ci_array, ci_array + array_size, i_array);
t.restart();
for(i = 0; i < iter_count; ++i)
{
opt::detail::copier<false>::template do_copy<const int*, int*>(ci_array, ci_array + array_size, i_array);
}
result = t.elapsed();
cout << "standard \"unoptimised\" copy: " << result << endl << endl;
/*cache load*/ opt::copy<const char*, char*>(cc_array, cc_array + array_size, c_array);
t.restart();
for(i = 0; i < iter_count; ++i)
{
opt::copy<const char*, char*>(cc_array, cc_array + array_size, c_array);
}
result = t.elapsed();
cout << "opt::copy<const char*, char*>: " << result << endl;
/*cache load*/ std::copy<const char*, char*>(cc_array, cc_array + array_size, c_array);
t.restart();
for(i = 0; i < iter_count; ++i)
{
std::copy<const char*, char*>(cc_array, cc_array + array_size, c_array);
}
result = t.elapsed();
cout << "std::copy<const char*, char*>: " << result << endl;
/*cache load*/ opt::detail::copier<false>::template do_copy<const char*, char*>(cc_array, cc_array + array_size, c_array);
t.restart();
for(i = 0; i < iter_count; ++i)
{
opt::detail::copier<false>::template do_copy<const char*, char*>(cc_array, cc_array + array_size, c_array);
}
result = t.elapsed();
cout << "standard \"unoptimised\" copy: " << result << endl << endl;
//
// testing iter_swap
// really just a check that it does in fact compile...
std::vector<int> v1;
v1.push_back(0);
v1.push_back(1);
std::vector<bool> v2;
v2.push_back(0);
v2.push_back(1);
opt::iter_swap(v1.begin(), v1.begin()+1);
opt::iter_swap(v2.begin(), v2.begin()+1);
cout << "Press any key to exit...";
cin.get();
}

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#if defined(_MSC_VER) && !defined(__ICL)
#pragma warning(disable: 4786) // identifier truncated in debug info
#pragma warning(disable: 4710) // function not inlined
#pragma warning(disable: 4711) // function selected for automatic inline expansion
#pragma warning(disable: 4514) // unreferenced inline removed
#endif
//
// assert_test.cpp - a test for boost/assert.hpp
//
// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
#define BOOST_DEBUG 1
#include <boost/assert.hpp>
#include <cstdio>
bool boost_error(char const * expr, char const * func, char const * file, long line)
{
std::printf("%s(%ld): Assertion '%s' failed in function '%s'\n", file, line, expr, func);
return true; // fail w/ standard assert()
}
int main()
{
BOOST_ASSERT(0 == 1);
}

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<title>Boost: Base-from-Member Idiom Documentation</title>
</head>
<body bgcolor="white" link="blue" text="black" vlink="purple" alink="red">
<h1><img src="../../c++boost.gif" alt="C++ Boost" align="middle"
width="277" height="86">Base-from-Member Idiom</h1>
<p>The class template <code>boost::base_from_member</code> provides
a workaround for a class that needs to initialize a base class with a
member. The class template is in <cite><a
href="../../boost/utility/base_from_member.hpp">boost/utility/base_from_member.hpp</a></cite>
which is included in <i><a href="../../boost/utility.hpp">boost/utility.hpp</a></i>.
The class template is forward declared in <i><a href="../../boost/utility_fwd.hpp">boost/utility_fwd.hpp</a></i>.</p>
<p>There is test/example code in <cite><a
href="base_from_member_test.cpp">base_from_member_test.cpp</a></cite>.</p>
<h2><a name="contents">Contents</a></h2>
<ul>
<li><a href="#contents">Contents</a></li>
<li><a href="#rationale">Rationale</a></li>
<li><a href="#synopsis">Synopsis</a></li>
<li><a href="#usage">Usage</a></li>
<li><a href="#example">Example</a></li>
<li><a href="#credits">Credits</a>
<ul>
<li><a href="#contributors">Contributors</a></li>
</ul></li>
</ul>
<h2><a name="rationale">Rationale</a></h2>
<p>When developing a class, sometimes a base class needs to be
initialized with a member of the current class. As a na&iuml;ve
example:</p>
<blockquote><pre>
#include &lt;streambuf&gt; <i>// for std::streambuf</i>
#include &lt;ostream&gt; <i>// for std::ostream</i>
class fdoutbuf
: public std::streambuf
{
public:
explicit fdoutbuf( int fd );
//...
};
class fdostream
: public std::ostream
{
protected:
fdoutbuf buf;
public:
explicit fdostream( int fd )
: buf( fd ), std::ostream( &amp;buf )
{}
//...
};
</pre></blockquote>
<p>This is undefined because C++'s initialization order mandates that
the base class is initialized before the member it uses. Ron Klatchko
developed a way around this by using the initialization order in his
favor. Base classes are intialized in order of declaration, so moving
the desired member to another base class, that is initialized before the
desired base class, can ensure proper initialization.</p>
<p>A custom base class can be made for this idiom:</p>
<blockquote><pre>
#include &lt;streambuf&gt; <i>// for std::streambuf</i>
#include &lt;ostream&gt; <i>// for std::ostream</i>
class fdoutbuf
: public std::streambuf
{
public:
explicit fdoutbuf( int fd );
//...
};
struct fdostream_pbase
{
fdoutbuf sbuffer;
explicit fdostream_pbase( int fd )
: sbuffer( fd )
{}
};
class fdostream
: private fdostream_pbase
, public std::ostream
{
typedef fdostream_pbase pbase_type;
typedef std::ostream base_type;
public:
explicit fdostream( int fd )
: pbase_type( fd ), base_type( &amp;sbuffer )
{}
//...
};
</pre></blockquote>
<p>Other projects can use similar custom base classes. The technique is basic enough to make a template, with a sample template class in this library. The main template parameter is the type of the enclosed member. The template class has several (explicit) constructor member templates, which implicitly type the constructor arguments and pass them to the member. The template class uses implicit copy construction and assignment, cancelling them if the enclosed member is non-copyable.</p>
<p>Manually coding a base class may be better if the construction
and/or copying needs are too complex for the supplied template class,
or if the compiler is not advanced enough to use it.</p>
<p>Since base classes are unnamed, a class cannot have multiple (direct)
base classes of the same type. The supplied template class has an
extra template parameter, an integer, that exists solely to provide type
differentiation. This parameter has a default value so a single use of a
particular member type does not need to concern itself with the integer.</p>
<h2><a name="synopsis">Synopsis</a></h2>
<blockquote><pre>
template &lt; typename MemberType, int UniqueID = 0 &gt;
class boost::base_from_member
{
protected:
MemberType member;
explicit base_from_member();
template&lt; typename T1 &gt;
explicit base_from_member( T1 x1 );
//...
template&lt; typename T1, typename T2, typename T3 &gt;
explicit base_from_member( T1 x1, T2 x2, T3 x3 );
};
</pre></blockquote>
<p>The class template has a first template parameter
<var>MemberType</var> representing the type of the based-member.
It has a last template parameter <var>UniqueID</var>, that is an
<code>int</code>, to differentiate between multiple base classes that use
the same based-member type. The last template parameter has a default
value of zero if it is omitted. The class template has a protected
data member called <var>member</var> that the derived class can use
for later base classes (or itself).</p>
<p>There is a default constructor and several constructor member
templates. These constructor templates can take as many arguments
(currently up to three) as possible and pass them to a constructor of
the data member. Since C++ does not allow any way to explicitly state
the template parameters of a templated constructor, make sure that
the arguments are already close as possible to the actual type used in
the data member's desired constructor.</p>
<h2><a name="usage">Usage</a></h2>
<p>With the starting example, the <code>fdoutbuf</code> sub-object needs
to be encapsulated in a base class that is inheirited before
<code>std::ostream</code>.</p>
<blockquote><pre>
#include &lt;boost/utility/base_from_member.hpp&gt;
#include &lt;streambuf&gt; <i>// for std::streambuf</i>
#include &lt;ostream&gt; <i>// for std::ostream</i>
class fdoutbuf
: public std::streambuf
{
public:
explicit fdoutbuf( int fd );
//...
};
class fdostream
: private boost::base_from_member&lt;fdoutbuf&gt;
, public std::ostream
{
// Helper typedef's
typedef boost::base_from_member&lt;fdoutbuf&gt; pbase_type;
typedef std::ostream base_type;
public:
explicit fdostream( int fd )
: pbase_type( fd ), base_type( &amp;member )
{}
//...
};
</pre></blockquote>
<p>The base-from-member idiom is an implementation detail, so it
should not be visible to the clients (or any derived classes) of
<code>fdostream</code>. Due to the initialization order, the
<code>fdoutbuf</code> sub-object will get initialized before the
<code>std::ostream</code> sub-object does, making the former
sub-object safe to use in the latter sub-object's construction. Since the
<code>fdoutbuf</code> sub-object of the final type is the only sub-object
with the name &quot;member,&quot; that name can be used
unqualified within the final class.</p>
<h2><a name="example">Example</a></h2>
<p>The base-from-member class templates should commonly involve
only one base-from-member sub-object, usually for attaching a
stream-buffer to an I/O stream. The next example demonstrates how
to use multiple base-from-member sub-objects and the resulting
qualification issues.</p>
<blockquote><pre>
#include &lt;boost/utility/base_from_member.hpp&gt;
#include &lt;cstddef&gt; <i>// for NULL</i>
struct an_int
{
int y;
an_int( float yf );
};
class switcher
{
public:
switcher();
switcher( double, int * );
//...
};
class flow_regulator
{
public:
flow_regulator( switcher &amp;, switcher &amp; );
//...
};
template &lt; unsigned Size &gt;
class fan
{
public:
explicit fan( switcher );
//...
};
class system
: private boost::base_from_member&lt;an_int&gt;
, private boost::base_from_member&lt;switcher&gt;
, private boost::base_from_member&lt;switcher, 1&gt;
, private boost::base_from_member&lt;switcher, 2&gt;
, protected flow_regulator
, public fan&lt;6&gt;
{
// Helper typedef's
typedef boost::base_from_member&lt;an_int&gt; pbase0_type;
typedef boost::base_from_member&lt;switcher&gt; pbase1_type;
typedef boost::base_from_member&lt;switcher, 1&gt; pbase2_type;
typedef boost::base_from_member&lt;switcher, 2&gt; pbase3_type;
typedef flow_regulator base1_type;
typedef fan&lt;6&gt; base2_type;
public:
system( double x );
//...
};
system::system( double x )
: pbase0_type( 0.2 )
, pbase1_type()
, pbase2_type( -16, &amp;this-&gt;pbase0_type::member )
, pbase3_type( x, static_cast&lt;int *&gt;(NULL) )
, base1_type( pbase3_type::member, pbase1_type::member )
, base2_type( pbase2_type::member )
{
//...
}
</pre></blockquote>
<p>The final class has multiple sub-objects with the name
&quot;member,&quot; so any use of that name needs qualification by
a name of the appropriate base type. (Using <code>typedef</code>s
ease mentioning the base types.) However, the fix introduces a new
problem when a pointer is needed. Using the address operator with
a sub-object qualified with its class's name results in a pointer-to-member
(here, having a type of <code>an_int boost::base_from_member&lt;an_int,
0&gt; :: *</code>) instead of a pointer to the member (having a type of
<code>an_int *</code>). The new problem is fixed by qualifying the
sub-object with &quot;<code>this-&gt;</code>,&quot; and is needed just
for pointers, and not for references or values.</p>
<p>There are some argument conversions in the initialization. The
constructor argument for <code>pbase0_type</code> is converted from
<code>double</code> to <code>float</code>. The first constructor
argument for <code>pbase2_type</code> is converted from <code>int</code>
to <code>double</code>. The second constructor argument for
<code>pbase3_type</code> is a special case of necessary conversion; all
forms of the null-pointer literal in C++ also look like compile-time
integral expressions, so C++ always interprets such code as an integer
when it has overloads that can take either an integer or a pointer. The
last conversion is necessary for the compiler to call a constructor form
with the exact pointer type used in <code>switcher</code>'s constructor.</p>
<h2><a name="credits">Credits</a></h2>
<h3><a name="contributors">Contributors</a></h3>
<dl>
<dt><a href="../../people/ed_brey.htm">Ed Brey</a>
<dd>Suggested some interface changes.
<dt>Ron Klatchko (<a href="mailto:ron@crl.com">ron@crl.com</a>)
<dd>Invented the idiom of how to use a class member for initializing
a base class.
<dt><a href="../../people/dietmar_kuehl.htm">Dietmar Kuehl</a>
<dd>Popularized the base-from-member idiom in his
<a href="http://www.informatik.uni-konstanz.de/~kuehl/c++/iostream/">IOStream
example classes</a>.
<dt><a href="../../people/daryle_walker.html">Daryle Walker</a>
<dd>Started the library. Contributed the test file <cite><a
href="base_from_member_test.cpp">base_from_member_test.cpp</a></cite>.
</dl>
<hr>
<p>Revised: 22 August 2001</p>
<p>Copyright &copy; boost.org 2001. Permission to copy, use, modify,
sell and distribute this document is granted provided this copyright
notice appears in all copies. This document is provided &quot;as
is&quot; without express or implied warranty, and with no claim as to
its suitability for any purpose.</p>
</body>
</html>

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// Boost test program for base-from-member class templates -----------------//
// (C) Copyright Daryle Walker 2001. Permission to copy, use, modify, sell
// and distribute this software is granted provided this copyright
// notice appears in all copies. This software is provided "as is" without
// express or implied warranty, and with no claim as to its suitability for
// any purpose.
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 29 Aug 2001 Initial Version (Daryle Walker)
#define BOOST_INCLUDE_MAIN
#include <boost/test/test_tools.hpp> // for BOOST_TEST, main
#include <boost/config.hpp> // for BOOST_NO_MEMBER_TEMPLATES
#include <boost/cstdlib.hpp> // for boost::exit_success
#include <boost/utility.hpp> // for boost::noncopyable
#include <boost/utility/base_from_member.hpp> // for boost::base_from_member
#include <functional> // for std::binary_function, std::less
#include <iostream> // for std::cout (std::ostream, std::endl indirectly)
#include <set> // for std::set
#include <typeinfo> // for std::type_info
#include <utility> // for std::pair, std::make_pair
#include <vector> // for std::vector
// Control if extra information is printed
#ifndef CONTROL_EXTRA_PRINTING
#define CONTROL_EXTRA_PRINTING 1
#endif
// A (sub)object can be identified by its memory location and its type.
// Both are needed since an object can start at the same place as its
// first base class subobject and/or contained subobject.
typedef std::pair< void *, std::type_info const * > object_id;
// Object IDs need to be printed
std::ostream & operator <<( std::ostream &os, object_id const &oi );
// A way to generate an object ID
template < typename T >
object_id identify( T &obj );
// A custom comparison type is needed
struct object_id_compare
: std::binary_function<object_id, object_id, bool>
{
bool operator ()( object_id const &a, object_id const &b ) const;
}; // object_id_compare
// A singleton of this type coordinates the acknowledgements
// of objects being created and used.
class object_registrar
: private boost::noncopyable
{
public:
#ifndef BOOST_NO_MEMBER_TEMPLATES
template < typename T >
void register_object( T &obj )
{ this->register_object_imp( identify(obj) ); }
template < typename T, typename U >
void register_use( T &owner, U &owned )
{ this->register_use_imp( identify(owner), identify(owned) ); }
template < typename T, typename U >
void unregister_use( T &owner, U &owned )
{ this->unregister_use_imp( identify(owner), identify(owned) ); }
template < typename T >
void unregister_object( T &obj )
{ this->unregister_object_imp( identify(obj) ); }
#endif
void register_object_imp( object_id obj );
void register_use_imp( object_id owner, object_id owned );
void unregister_use_imp( object_id owner, object_id owned );
void unregister_object_imp( object_id obj );
typedef std::set<object_id, object_id_compare> set_type;
typedef std::vector<object_id> error_record_type;
typedef std::vector< std::pair<object_id, object_id> > error_pair_type;
set_type db_;
error_pair_type defrauders_in_, defrauders_out_;
error_record_type overeager_, overkilled_;
}; // object_registrar
// A sample type to be used by containing types
class base_or_member
{
public:
explicit base_or_member( int x = 1, double y = -0.25 );
~base_or_member();
}; // base_or_member
// A sample type that uses base_or_member, used
// as a base for the main demonstration classes
class base_class
{
public:
explicit base_class( base_or_member &x, base_or_member *y = 0,
base_or_member *z = 0 );
~base_class();
private:
base_or_member *x_, *y_, *z_;
}; // base_class
// This bad class demonstrates the direct method of a base class needing
// to be initialized by a member. This is improper since the member
// isn't initialized until after the base class.
class bad_class
: public base_class
{
public:
bad_class();
~bad_class();
private:
base_or_member x_;
}; // bad_class
// The first good class demonstrates the correct way to initialize a
// base class with a member. The member is changed to another base
// class, one that is initialized before the base that needs it.
class good_class_1
: private boost::base_from_member<base_or_member>
, public base_class
{
typedef boost::base_from_member<base_or_member> pbase_type;
typedef base_class base_type;
public:
good_class_1();
~good_class_1();
}; // good_class_1
// The second good class also demonstrates the correct way to initialize
// base classes with other subobjects. This class uses the other helpers
// in the library, and shows the technique of using two base subobjects
// of the "same" type.
class good_class_2
: private boost::base_from_member<base_or_member, 0>
, private boost::base_from_member<base_or_member, 1>
, private boost::base_from_member<base_or_member, 2>
, public base_class
{
typedef boost::base_from_member<base_or_member, 0> pbase_type0;
typedef boost::base_from_member<base_or_member, 1> pbase_type1;
typedef boost::base_from_member<base_or_member, 2> pbase_type2;
typedef base_class base_type;
public:
good_class_2();
~good_class_2();
}; // good_class_2
// Declare/define the single object registrar
object_registrar obj_reg;
// Main functionality
int
test_main( int , char * [] )
{
BOOST_TEST( obj_reg.db_.empty() );
BOOST_TEST( obj_reg.defrauders_in_.empty() );
BOOST_TEST( obj_reg.defrauders_out_.empty() );
BOOST_TEST( obj_reg.overeager_.empty() );
BOOST_TEST( obj_reg.overkilled_.empty() );
// Make a separate block to examine pre- and post-effects
{
using std::cout;
using std::endl;
bad_class bc;
BOOST_TEST( obj_reg.db_.size() == 3 );
BOOST_TEST( obj_reg.defrauders_in_.size() == 1 );
good_class_1 gc1;
BOOST_TEST( obj_reg.db_.size() == 6 );
BOOST_TEST( obj_reg.defrauders_in_.size() == 1 );
good_class_2 gc2;
BOOST_TEST( obj_reg.db_.size() == 11 );
BOOST_TEST( obj_reg.defrauders_in_.size() == 1 );
BOOST_TEST( obj_reg.defrauders_out_.empty() );
BOOST_TEST( obj_reg.overeager_.empty() );
BOOST_TEST( obj_reg.overkilled_.empty() );
// Getting the addresses of the objects ensure
// that they're used, and not optimized away.
cout << "Object 'bc' is at " << &bc << '.' << endl;
cout << "Object 'gc1' is at " << &gc1 << '.' << endl;
cout << "Object 'gc2' is at " << &gc2 << '.' << endl;
}
BOOST_TEST( obj_reg.db_.empty() );
BOOST_TEST( obj_reg.defrauders_in_.size() == 1 );
BOOST_TEST( obj_reg.defrauders_out_.size() == 1 );
BOOST_TEST( obj_reg.overeager_.empty() );
BOOST_TEST( obj_reg.overkilled_.empty() );
return boost::exit_success;
}
// Print an object's ID
std::ostream &
operator <<
(
std::ostream & os,
object_id const & oi
)
{
// I had an std::ostringstream to help, but I did not need it since
// the program never screws around with formatting. Worse, using
// std::ostringstream is an issue with some compilers.
return os << '[' << ( oi.second ? oi.second->name() : "NOTHING" )
<< " at " << oi.first << ']';
}
// Get an object ID given an object
template < typename T >
inline
object_id
identify
(
T & obj
)
{
return std::make_pair( static_cast<void *>(&obj), &(typeid( obj )) );
}
// Compare two object IDs
bool
object_id_compare::operator ()
(
object_id const & a,
object_id const & b
) const
{
std::less<void *> vp_cmp;
if ( vp_cmp(a.first, b.first) )
{
return true;
}
else if ( vp_cmp(b.first, a.first) )
{
return false;
}
else
{
// object pointers are equal, compare the types
if ( a.second == b.second )
{
return false;
}
else if ( !a.second )
{
return true; // NULL preceeds anything else
}
else if ( !b.second )
{
return false; // NULL preceeds anything else
}
else
{
return a.second->before( *b.second );
}
}
}
// Let an object register its existence
void
object_registrar::register_object_imp
(
object_id obj
)
{
if ( db_.count(obj) <= 0 )
{
db_.insert( obj );
#if CONTROL_EXTRA_PRINTING
std::cout << "Registered " << obj << '.' << std::endl;
#endif
}
else
{
overeager_.push_back( obj );
#if CONTROL_EXTRA_PRINTING
std::cout << "Attempted to register a non-existant " << obj
<< '.' << std::endl;
#endif
}
}
// Let an object register its use of another object
void
object_registrar::register_use_imp
(
object_id owner,
object_id owned
)
{
if ( db_.count(owned) > 0 )
{
// We don't care to record usage registrations
}
else
{
defrauders_in_.push_back( std::make_pair(owner, owned) );
#if CONTROL_EXTRA_PRINTING
std::cout << "Attempted to own a non-existant " << owned
<< " by " << owner << '.' << std::endl;
#endif
}
}
// Let an object un-register its use of another object
void
object_registrar::unregister_use_imp
(
object_id owner,
object_id owned
)
{
if ( db_.count(owned) > 0 )
{
// We don't care to record usage un-registrations
}
else
{
defrauders_out_.push_back( std::make_pair(owner, owned) );
#if CONTROL_EXTRA_PRINTING
std::cout << "Attempted to disown a non-existant " << owned
<< " by " << owner << '.' << std::endl;
#endif
}
}
// Let an object un-register its existence
void
object_registrar::unregister_object_imp
(
object_id obj
)
{
set_type::iterator const i = db_.find( obj );
if ( i != db_.end() )
{
db_.erase( i );
#if CONTROL_EXTRA_PRINTING
std::cout << "Unregistered " << obj << '.' << std::endl;
#endif
}
else
{
overkilled_.push_back( obj );
#if CONTROL_EXTRA_PRINTING
std::cout << "Attempted to unregister a non-existant " << obj
<< '.' << std::endl;
#endif
}
}
// Macros to abstract the registration of objects
#ifndef BOOST_NO_MEMBER_TEMPLATES
#define PRIVATE_REGISTER_BIRTH(o) obj_reg.register_object( (o) )
#define PRIVATE_REGISTER_DEATH(o) obj_reg.unregister_object( (o) )
#define PRIVATE_REGISTER_USE(o, w) obj_reg.register_use( (o), (w) )
#define PRIVATE_UNREGISTER_USE(o, w) obj_reg.unregister_use( (o), (w) )
#else
#define PRIVATE_REGISTER_BIRTH(o) obj_reg.register_object_imp( \
identify((o)) )
#define PRIVATE_REGISTER_DEATH(o) obj_reg.unregister_object_imp( \
identify((o)) )
#define PRIVATE_REGISTER_USE(o, w) obj_reg.register_use_imp( identify((o)), \
identify((w)) )
#define PRIVATE_UNREGISTER_USE(o, w) obj_reg.unregister_use_imp( \
identify((o)), identify((w)) )
#endif
// Create a base_or_member, with arguments to simulate member initializations
base_or_member::base_or_member
(
int x, // = 1
double y // = -0.25
)
{
PRIVATE_REGISTER_BIRTH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy x-factor is " << x << " and my y-factor is " << y
<< '.' << std::endl;
#endif
}
// Destroy a base_or_member
inline
base_or_member::~base_or_member
(
)
{
PRIVATE_REGISTER_DEATH( *this );
}
// Create a base_class, registering any objects used
base_class::base_class
(
base_or_member & x,
base_or_member * y, // = 0
base_or_member * z // = 0
)
: x_( &x ), y_( y ), z_( z )
{
PRIVATE_REGISTER_BIRTH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy x-factor is " << x_;
#endif
PRIVATE_REGISTER_USE( *this, *x_ );
if ( y_ )
{
#if CONTROL_EXTRA_PRINTING
std::cout << ", my y-factor is " << y_;
#endif
PRIVATE_REGISTER_USE( *this, *y_ );
}
if ( z_ )
{
#if CONTROL_EXTRA_PRINTING
std::cout << ", my z-factor is " << z_;
#endif
PRIVATE_REGISTER_USE( *this, *z_ );
}
#if CONTROL_EXTRA_PRINTING
std::cout << '.' << std::endl;
#endif
}
// Destroy a base_class, unregistering the objects it uses
base_class::~base_class
(
)
{
PRIVATE_REGISTER_DEATH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy x-factor was " << x_;
#endif
PRIVATE_UNREGISTER_USE( *this, *x_ );
if ( y_ )
{
#if CONTROL_EXTRA_PRINTING
std::cout << ", my y-factor was " << y_;
#endif
PRIVATE_UNREGISTER_USE( *this, *y_ );
}
if ( z_ )
{
#if CONTROL_EXTRA_PRINTING
std::cout << ", my z-factor was " << z_;
#endif
PRIVATE_UNREGISTER_USE( *this, *z_ );
}
#if CONTROL_EXTRA_PRINTING
std::cout << '.' << std::endl;
#endif
}
// Create a bad_class, noting the improper construction order
bad_class::bad_class
(
)
: x_( -7, 16.75 ), base_class( x_ ) // this order doesn't matter
{
PRIVATE_REGISTER_BIRTH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy factor is at " << &x_
<< " and my base is at " << static_cast<base_class *>(this) << '.'
<< std::endl;
#endif
}
// Destroy a bad_class, noting the improper destruction order
bad_class::~bad_class
(
)
{
PRIVATE_REGISTER_DEATH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy factor was at " << &x_
<< " and my base was at " << static_cast<base_class *>(this)
<< '.' << std::endl;
#endif
}
// Create a good_class_1, noting the proper construction order
good_class_1::good_class_1
(
)
: pbase_type( 8 ), base_type( member )
{
PRIVATE_REGISTER_BIRTH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy factor is at " << &member
<< " and my base is at " << static_cast<base_class *>(this) << '.'
<< std::endl;
#endif
}
// Destroy a good_class_1, noting the proper destruction order
good_class_1::~good_class_1
(
)
{
PRIVATE_REGISTER_DEATH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy factor was at " << &member
<< " and my base was at " << static_cast<base_class *>(this)
<< '.' << std::endl;
#endif
}
// Create a good_class_2, noting the proper construction order
good_class_2::good_class_2
(
)
: pbase_type0(), pbase_type1(-16, 0.125), pbase_type2(2, -3)
, base_type( pbase_type1::member, &this->pbase_type0::member,
&this->pbase_type2::member )
{
PRIVATE_REGISTER_BIRTH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy factors are at " << &this->pbase_type0::member
<< ", " << &this->pbase_type1::member << ", "
<< &this->pbase_type2::member << ", and my base is at "
<< static_cast<base_class *>(this) << '.' << std::endl;
#endif
}
// Destroy a good_class_2, noting the proper destruction order
good_class_2::~good_class_2
(
)
{
PRIVATE_REGISTER_DEATH( *this );
#if CONTROL_EXTRA_PRINTING
std::cout << "\tMy factors were at " << &this->pbase_type0::member
<< ", " << &this->pbase_type1::member << ", "
<< &this->pbase_type2::member << ", and my base was at "
<< static_cast<base_class *>(this) << '.' << std::endl;
#endif
}

249
binary_search_test.cpp Normal file
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// (C) Copyright David Abrahams 2000. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#include <vector>
#include <string>
#include <memory>
#include <climits>
#include <iostream>
#include <cassert>
#include <stdlib.h> // for rand(). Would use cstdlib but VC6.4 doesn't put it in std::
#include <list>
#include <algorithm>
#include <boost/detail/binary_search.hpp>
#if defined(__SGI_STL_PORT) ? defined(__SGI_STL_OWN_IOSTREAMS) : (!defined(__GNUC__) || __GNUC__ > 2)
# define USE_SSTREAM
#endif
#ifdef USE_SSTREAM
# include <sstream>
#else
# include <strstream>
#endif
namespace {
typedef std::vector<std::string> string_vector;
const std::size_t sequence_length = 1000;
unsigned random_number()
{
return static_cast<unsigned>(::rand()) % sequence_length;
}
# ifndef USE_SSTREAM
class unfreezer {
public:
unfreezer(std::ostrstream& s) : m_stream(s) {}
~unfreezer() { m_stream.freeze(false); }
private:
std::ostrstream& m_stream;
};
# endif
template <class T>
void push_back_random_number_string(T& seq)
{
unsigned value = random_number();
# if defined(__SGI_STL_PORT) ? defined(__SGI_STL_OWN_IOSTREAMS) : (!defined(__GNUC__) || __GNUC__ > 2)
std::ostringstream s;
s << value;
seq.push_back(s.str());
# else
std::ostrstream s;
auto unfreezer unfreeze(s);
s << value << char(0);
seq.push_back(std::string(s.str()));
# endif
}
inline unsigned to_int(unsigned x) { return x; }
inline unsigned to_int(const std::string& x) { return atoi(x.c_str()); }
struct cmp
{
template <class A1, class A2>
inline bool operator()(const A1& a1, const A2& a2) const
{
return to_int(a1) < to_int(a2);
}
};
inline bool operator<(const std::string& x, const unsigned y)
{
return to_int(x) < y;
}
inline bool operator<(const unsigned y, const std::string& x)
{
return y < to_int(x);
}
template <class T> void sort_by_value(T&);
template <>
void sort_by_value(std::vector<std::string>& v)
{
std::sort(v.begin(), v.end(), cmp());
}
template <class T>
void random_sorted_sequence(T& seq)
{
seq.clear();
for (std::size_t i = 0; i < sequence_length; ++i)
{
push_back_random_number_string(seq);
}
sort_by_value(seq);
}
# if defined(BOOST_MSVC) && BOOST_MSVC < 1300 && !defined(__SGI_STL_PORT)
// VC6's standard lib doesn't have a template member function for list::sort()
template <>
void random_sorted_sequence(std::list<std::string>& result)
{
std::vector<std::string> seq;
seq.reserve(sequence_length);
for (std::size_t i = 0; i < sequence_length; ++i)
{
push_back_random_number_string(seq);
}
sort_by_value(seq);
result.resize(seq.size());
std::copy(seq.begin(), seq.end(), result.begin());
}
#else
template <>
inline void sort_by_value(std::list<std::string>& l)
{
l.sort(cmp());
}
# endif
// A way to select the comparisons with/without a Compare parameter for testing.
template <class Compare> struct searches
{
template <class Iterator, class Key>
static Iterator lower_bound(Iterator start, Iterator finish, Key key, Compare cmp)
{ return boost::detail::lower_bound(start, finish, key, cmp); }
template <class Iterator, class Key>
static Iterator upper_bound(Iterator start, Iterator finish, Key key, Compare cmp)
{ return boost::detail::upper_bound(start, finish, key, cmp); }
template <class Iterator, class Key>
static std::pair<Iterator, Iterator> equal_range(Iterator start, Iterator finish, Key key, Compare cmp)
{ return boost::detail::equal_range(start, finish, key, cmp); }
template <class Iterator, class Key>
static bool binary_search(Iterator start, Iterator finish, Key key, Compare cmp)
{ return boost::detail::binary_search(start, finish, key, cmp); }
};
struct no_compare {};
template <> struct searches<no_compare>
{
template <class Iterator, class Key>
static Iterator lower_bound(Iterator start, Iterator finish, Key key, no_compare)
{ return boost::detail::lower_bound(start, finish, key); }
template <class Iterator, class Key>
static Iterator upper_bound(Iterator start, Iterator finish, Key key, no_compare)
{ return boost::detail::upper_bound(start, finish, key); }
template <class Iterator, class Key>
static std::pair<Iterator, Iterator> equal_range(Iterator start, Iterator finish, Key key, no_compare)
{ return boost::detail::equal_range(start, finish, key); }
template <class Iterator, class Key>
static bool binary_search(Iterator start, Iterator finish, Key key, no_compare)
{ return boost::detail::binary_search(start, finish, key); }
};
template <class Sequence, class Compare>
void test_loop(Sequence& x, Compare cmp, unsigned long test_count)
{
typedef typename Sequence::const_iterator const_iterator;
for (unsigned long i = 0; i < test_count; ++i)
{
random_sorted_sequence(x);
const const_iterator start = x.begin();
const const_iterator finish = x.end();
unsigned key = random_number();
const const_iterator l = searches<Compare>::lower_bound(start, finish, key, cmp);
const const_iterator u = searches<Compare>::upper_bound(start, finish, key, cmp);
bool found_l = false;
bool found_u = false;
std::size_t index = 0;
std::size_t count = 0;
unsigned last_value = 0;
for (const_iterator p = start; p != finish; ++p)
{
if (p == l)
found_l = true;
if (p == u)
{
assert(found_l);
found_u = true;
}
unsigned value = to_int(*p);
assert(value >= last_value);
last_value = value;
if (!found_l)
{
++index;
assert(to_int(*p) < key);
}
else if (!found_u)
{
++count;
assert(to_int(*p) == key);
}
else
assert(to_int(*p) > key);
}
assert(found_l || l == finish);
assert(found_u || u == finish);
std::pair<const_iterator, const_iterator>
range = searches<Compare>::equal_range(start, finish, key, cmp);
assert(range.first == l);
assert(range.second == u);
bool found = searches<Compare>::binary_search(start, finish, key, cmp);
assert(found == (u != l));
std::cout << "found " << count << " copies of " << key << " at index " << index << "\n";
}
}
}
int main()
{
std::vector<std::string> x;
std::cout << "=== testing random-access iterators with <: ===\n";
test_loop(x, no_compare(), 25);
std::cout << "=== testing random-access iterators with compare: ===\n";
test_loop(x, cmp(), 25);
std::list<std::string> y;
std::cout << "=== testing bidirectional iterators with <: ===\n";
test_loop(y, no_compare(), 25);
std::cout << "=== testing bidirectional iterators with compare: ===\n";
test_loop(y, cmp(), 25);
std::cerr << "******TEST PASSED******\n";
return 0;
}

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@ -1,489 +0,0 @@
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>C++ Type traits</title>
</head>
<body bgcolor="#FFFFFF" link="#0000FF" vlink="#800080">
<h2 align="center">C++ Type traits</h2>
<p align="center"><em>by John Maddock and Steve Cleary</em></p>
<p align="center"><em>This is a draft of an article that will appear in a future
issue of </em><a href="http://www.ddj.com"><em>Dr Dobb's Journal</em></a></p>
<p>Generic programming (writing code which works with any data type meeting a
set of requirements) has become the method of choice for providing reusable
code. However, there are times in generic programming when &quot;generic&quot;
just isn't good enough - sometimes the differences between types are too large
for an efficient generic implementation. This is when the traits technique
becomes important - by encapsulating those properties that need to be considered
on a type by type basis inside a traits class, we can minimise the amount of
code that has to differ from one type to another, and maximise the amount of
generic code.</p>
<p>Consider an example: when working with character strings, one common
operation is to determine the length of a null terminated string. Clearly it's
possible to write generic code that can do this, but it turns out that there are
much more efficient methods available: for example, the C library functions <font size="2" face="Courier New">strlen</font>
and <font size="2" face="Courier New">wcslen</font> are usually written in
assembler, and with suitable hardware support can be considerably faster than a
generic version written in C++. The authors of the C++ standard library realised
this, and abstracted the properties of <font size="2" face="Courier New">char</font>
and <font size="2" face="Courier New">wchar_t</font> into the class <font size="2" face="Courier New">char_traits</font>.
Generic code that works with character strings can simply use <font size="2" face="Courier New">char_traits&lt;&gt;::length</font>
to determine the length of a null terminated string, safe in the knowledge that
specialisations of <font size="2" face="Courier New">char_traits</font> will use
the most appropriate method available to them.</p>
<h4>Type traits</h4>
<p>Class <font size="2" face="Courier New">char_traits</font> is a classic
example of a collection of type specific properties wrapped up in a single class
- what Nathan Myers termed a <i>baggage class</i>[1]. In the Boost type-traits
library, we[2] have written a set of very specific traits classes, each of which
encapsulate a single trait from the C++ type system; for example, is a type a
pointer or a reference type? Or does a type have a trivial constructor, or a
const-qualifier? The type-traits classes share a unified design: each class has
a single member <i>value</i>, a compile-time constant that is true if the type
has the specified property, and false otherwise. As we will show, these classes
can be used in generic programming to determine the properties of a given type
and introduce optimisations that are appropriate for that case.</p>
<p>The type-traits library also contains a set of classes that perform a
specific transformation on a type; for example, they can remove a top-level
const or volatile qualifier from a type. Each class that performs a
transformation defines a single typedef-member <i>type</i> that is the result of
the transformation. All of the type-traits classes are defined inside namespace <font size="2" face="Courier New">boost</font>;
for brevity, namespace-qualification is omitted in most of the code samples
given.</p>
<h4>Implementation</h4>
<p>There are far too many separate classes contained in the type-traits library
to give a full implementation here - see the source code in the Boost library
for the full details - however, most of the implementation is fairly repetitive
anyway, so here we will just give you a flavour for how some of the classes are
implemented. Beginning with possibly the simplest class in the library, is_void&lt;T&gt;
has a member <i>value</i> that is true only if T is void.</p>
<pre>template &lt;typename T&gt;
struct is_void
{ static const bool value = false; };
template &lt;&gt;
struct is_void&lt;void&gt;
{ static const bool value = true; };</pre>
<p>Here we define a primary version of the template class <font size="2" face="Courier New">is_void</font>,
and provide a full-specialisation when T is void. While full specialisation of a
template class is an important technique, sometimes we need a solution that is
halfway between a fully generic solution, and a full specialisation. This is
exactly the situation for which the standards committee defined partial
template-class specialisation. As an example, consider the class
boost::is_pointer&lt;T&gt;: here we needed a primary version that handles all
the cases where T is not a pointer, and a partial specialisation to handle all
the cases where T is a pointer:</p>
<pre>template &lt;typename T&gt;
struct is_pointer
{ static const bool value = false; };
template &lt;typename T&gt;
struct is_pointer&lt;T*&gt;
{ static const bool value = true; };</pre>
<p>The syntax for partial specialisation is somewhat arcane and could easily
occupy an article in its own right; like full specialisation, in order to write
a partial specialisation for a class, you must first declare the primary
template. The partial specialisation contains an extra &lt;<EFBFBD>&gt; after the
class name that contains the partial specialisation parameters; these define the
types that will bind to that partial specialisation rather than the default
template. The rules for what can appear in a partial specialisation are somewhat
convoluted, but as a rule of thumb if you can legally write two function
overloads of the form:</p>
<pre>void foo(T);
void foo(U);</pre>
<p>Then you can also write a partial specialisation of the form:</p>
<pre>template &lt;typename T&gt;
class c{ /*details*/ };
template &lt;typename T&gt;
class c&lt;U&gt;{ /*details*/ };</pre>
<p>This rule is by no means foolproof, but it is reasonably simple to remember
and close enough to the actual rule to be useful for everyday use.</p>
<p>As a more complex example of partial specialisation consider the class
remove_bounds&lt;T&gt;. This class defines a single typedef-member <i>type</i>
that is the same type as T but with any top-level array bounds removed; this is
an example of a traits class that performs a transformation on a type:</p>
<pre>template &lt;typename T&gt;
struct remove_bounds
{ typedef T type; };
template &lt;typename T, std::size_t N&gt;
struct remove_bounds&lt;T[N]&gt;
{ typedef T type; };</pre>
<p>The aim of remove_bounds is this: imagine a generic algorithm that is passed
an array type as a template parameter, <font size="2" face="Courier New">remove_bounds</font>
provides a means of determining the underlying type of the array. For example <code>remove_bounds&lt;int[4][5]&gt;::type</code>
would evaluate to the type <code>int[5]</code>. This example also shows that the
number of template parameters in a partial specialisation does not have to match
the number in the default template. However, the number of parameters that
appear after the class name do have to match the number and type of the
parameters in the default template.</p>
<h4>Optimised copy</h4>
<p>As an example of how the type traits classes can be used, consider the
standard library algorithm copy:</p>
<pre>template&lt;typename Iter1, typename Iter2&gt;
Iter2 copy(Iter1 first, Iter1 last, Iter2 out);</pre>
<p>Obviously, there's no problem writing a generic version of copy that works
for all iterator types Iter1 and Iter2; however, there are some circumstances
when the copy operation can best be performed by a call to <font size="2" face="Courier New">memcpy</font>.
In order to implement copy in terms of <font size="2" face="Courier New">memcpy</font>
all of the following conditions need to be met:</p>
<ul>
<li>Both of the iterator types Iter1 and Iter2 must be pointers.</li>
<li>Both Iter1 and Iter2 must point to the same type - excluding <font size="2" face="Courier New">const</font>
and <font size="2" face="Courier New">volatile</font>-qualifiers.</li>
<li>The type pointed to by Iter1 must have a trivial assignment operator.</li>
</ul>
<p>By trivial assignment operator we mean that the type is either a scalar
type[3] or:</p>
<ul>
<li>The type has no user defined assignment operator.</li>
<li>The type does not have any data members that are references.</li>
<li>All base classes, and all data member objects must have trivial assignment
operators.</li>
</ul>
<p>If all these conditions are met then a type can be copied using <font size="2" face="Courier New">memcpy</font>
rather than using a compiler generated assignment operator. The type-traits
library provides a class <i>has_trivial_assign</i>, such that <code>has_trivial_assign&lt;T&gt;::value</code>
is true only if T has a trivial assignment operator. This class &quot;just
works&quot; for scalar types, but has to be explicitly specialised for
class/struct types that also happen to have a trivial assignment operator. In
other words if <i>has_trivial_assign</i> gives the wrong answer, it will give
the &quot;safe&quot; wrong answer - that trivial assignment is not allowable.</p>
<p>The code for an optimised version of copy that uses <font size="2" face="Courier New">memcpy</font>
where appropriate is given in listing 1. The code begins by defining a template
class <i>copier</i>, that takes a single Boolean template parameter, and has a
static template member function <font size="2" face="Courier New">do_copy</font>
which performs the generic version of <font size="2">copy</font> (in other words
the &quot;slow but safe version&quot;). Following that there is a specialisation
for <i>copier&lt;true&gt;</i>: again this defines a static template member
function <font size="2" face="Courier New">do_copy</font>, but this version uses
memcpy to perform an &quot;optimised&quot; copy.</p>
<p>In order to complete the implementation, what we need now is a version of
copy, that calls <code>copier&lt;true&gt;::do_copy</code> if it is safe to use <font size="2" face="Courier New">memcpy</font>,
and otherwise calls <code>copier&lt;false&gt;::do_copy</code> to do a
&quot;generic&quot; copy. This is what the version in listing 1 does. To
understand how the code works look at the code for <font size="2" face="Courier New">copy</font>
and consider first the two typedefs <i>v1_t</i> and <i>v2_t</i>. These use <code>std::iterator_traits&lt;Iter1&gt;::value_type</code>
to determine what type the two iterators point to, and then feed the result into
another type-traits class <i>remove_cv</i> that removes the top-level
const-volatile-qualifiers: this will allow copy to compare the two types without
regard to const- or volatile-qualifiers. Next, <font size="2" face="Courier New">copy</font>
declares an enumerated value <i>can_opt</i> that will become the template
parameter to copier - declaring this here as a constant is really just a
convenience - the value could be passed directly to class <font size="2" face="Courier New">copier</font>.
The value of <i>can_opt</i> is computed by verifying that all of the following
are true:</p>
<ul>
<li>first that the two iterators point to the same type by using a type-traits
class <i>is_same</i>.</li>
<li>Then that both iterators are real pointers - using the class <i>is_pointer</i>
described above.</li>
<li>Finally that the pointed-to types have a trivial assignment operator using
<i>has_trivial_assign</i>.</li>
</ul>
<p>Finally we can use the value of <i>can_opt</i> as the template argument to
copier - this version of copy will now adapt to whatever parameters are passed
to it, if its possible to use <font size="2" face="Courier New">memcpy</font>,
then it will do so, otherwise it will use a generic copy.</p>
<h4>Was it worth it?</h4>
<p>It has often been repeated in these columns that &quot;premature optimisation
is the root of all evil&quot; [4]. So the question must be asked: was our
optimisation premature? To put this in perspective the timings for our version
of copy compared a conventional generic copy[5] are shown in table 1.</p>
<p>Clearly the optimisation makes a difference in this case; but, to be fair,
the timings are loaded to exclude cache miss effects - without this accurate
comparison between algorithms becomes difficult. However, perhaps we can add a
couple of caveats to the premature optimisation rule:</p>
<ul>
<li>If you use the right algorithm for the job in the first place then
optimisation will not be required; in some cases, <font size="2" face="Courier New">memcpy</font>
is the right algorithm.</li>
<li>If a component is going to be reused in many places by many people then
optimisations may well be worthwhile where they would not be so for a single
case - in other words, the likelihood that the optimisation will be
absolutely necessary somewhere, sometime is that much higher. Just as
importantly the perceived value of the stock implementation will be higher:
there is no point standardising an algorithm if users reject it on the
grounds that there are better, more heavily optimised versions available.</li>
</ul>
<h4>Table 1: Time taken to copy 1000 elements using copy&lt;const T*, T*&gt;
(times in micro-seconds)</h4>
<table border="1" cellpadding="7" cellspacing="1" width="529">
<tr>
<td valign="top" width="33%">
<p align="center">Version</p>
</td>
<td valign="top" width="33%">
<p align="center">T</p>
</td>
<td valign="top" width="33%">
<p align="center">Time</p>
</td>
</tr>
<tr>
<td valign="top" width="33%">&quot;Optimised&quot; copy</td>
<td valign="top" width="33%">char</td>
<td valign="top" width="33%">0.99</td>
</tr>
<tr>
<td valign="top" width="33%">Conventional copy</td>
<td valign="top" width="33%">char</td>
<td valign="top" width="33%">8.07</td>
</tr>
<tr>
<td valign="top" width="33%">&quot;Optimised&quot; copy</td>
<td valign="top" width="33%">int</td>
<td valign="top" width="33%">2.52</td>
</tr>
<tr>
<td valign="top" width="33%">Conventional copy</td>
<td valign="top" width="33%">int</td>
<td valign="top" width="33%">8.02</td>
</tr>
</table>
<p>&nbsp;</p>
<h4>Pair of References</h4>
<p>The optimised copy example shows how type traits may be used to perform
optimisation decisions at compile-time. Another important usage of type traits
is to allow code to compile that otherwise would not do so unless excessive
partial specialization is used. This is possible by delegating partial
specialization to the type traits classes. Our example for this form of usage is
a pair that can hold references [6].</p>
<p>First, let us examine the definition of &quot;std::pair&quot;, omitting the
comparision operators, default constructor, and template copy constructor for
simplicity:</p>
<pre>template &lt;typename T1, typename T2&gt;
struct pair
{
typedef T1 first_type;
typedef T2 second_type;
T1 first;
T2 second;
pair(const T1 &amp; nfirst, const T2 &amp; nsecond)
:first(nfirst), second(nsecond) { }
};</pre>
<p>Now, this &quot;pair&quot; cannot hold references as it currently stands,
because the constructor would require taking a reference to a reference, which
is currently illegal [7]. Let us consider what the constructor's parameters
would have to be in order to allow &quot;pair&quot; to hold non-reference types,
references, and constant references:</p>
<table border="1" cellpadding="7" cellspacing="1" width="638">
<tr>
<td valign="top" width="50%">Type of &quot;T1&quot;</td>
<td valign="top" width="50%">Type of parameter to initializing constructor</td>
</tr>
<tr>
<td valign="top" width="50%">
<pre>T</pre>
</td>
<td valign="top" width="50%">
<pre>const T &amp;</pre>
</td>
</tr>
<tr>
<td valign="top" width="50%">
<pre>T &amp;</pre>
</td>
<td valign="top" width="50%">
<pre>T &amp;</pre>
</td>
</tr>
<tr>
<td valign="top" width="50%">
<pre>const T &amp;</pre>
</td>
<td valign="top" width="50%">
<pre>const T &amp;</pre>
</td>
</tr>
</table>
<p>A little familiarity with the type traits classes allows us to construct a
single mapping that allows us to determine the type of parameter from the type
of the contained class. The type traits classes provide a transformation &quot;add_reference&quot;,
which adds a reference to its type, unless it is already a reference.</p>
<table border="1" cellpadding="7" cellspacing="1" width="580">
<tr>
<td valign="top" width="21%">Type of &quot;T1&quot;</td>
<td valign="top" width="27%">Type of &quot;const T1&quot;</td>
<td valign="top" width="53%">Type of &quot;add_reference&lt;const
T1&gt;::type&quot;</td>
</tr>
<tr>
<td valign="top" width="21%">
<pre>T</pre>
</td>
<td valign="top" width="27%">
<pre>const T</pre>
</td>
<td valign="top" width="53%">
<pre>const T &amp;</pre>
</td>
</tr>
<tr>
<td valign="top" width="21%">
<pre>T &amp;</pre>
</td>
<td valign="top" width="27%">
<pre>T &amp; [8]</pre>
</td>
<td valign="top" width="53%">
<pre>T &amp;</pre>
</td>
</tr>
<tr>
<td valign="top" width="21%">
<pre>const T &amp;</pre>
</td>
<td valign="top" width="27%">
<pre>const T &amp;</pre>
</td>
<td valign="top" width="53%">
<pre>const T &amp;</pre>
</td>
</tr>
</table>
<p>This allows us to build a primary template definition for &quot;pair&quot;
that can contain non-reference types, reference types, and constant reference
types:</p>
<pre>template &lt;typename T1, typename T2&gt;
struct pair
{
typedef T1 first_type;
typedef T2 second_type;
T1 first;
T2 second;
pair(boost::add_reference&lt;const T1&gt;::type nfirst,
boost::add_reference&lt;const T2&gt;::type nsecond)
:first(nfirst), second(nsecond) { }
};</pre>
<p>Add back in the standard comparision operators, default constructor, and
template copy constructor (which are all the same), and you have a std::pair
that can hold reference types!</p>
<p>This same extension <i>could</i> have been done using partial template
specialization of &quot;pair&quot;, but to specialize &quot;pair&quot; in this
way would require three partial specializations, plus the primary template. Type
traits allows us to define a single primary template that adjusts itself
auto-magically to any of these partial specializations, instead of a brute-force
partial specialization approach. Using type traits in this fashion allows
programmers to delegate partial specialization to the type traits classes,
resulting in code that is easier to maintain and easier to understand.</p>
<h4>Conclusion</h4>
<p>We hope that in this article we have been able to give you some idea of what
type-traits are all about. A more complete listing of the available classes are
in the boost documentation, along with further examples using type traits.
Templates have enabled C++ uses to take the advantage of the code reuse that
generic programming brings; hopefully this article has shown that generic
programming does not have to sink to the lowest common denominator, and that
templates can be optimal as well as generic.</p>
<h4>Acknowledgements</h4>
<p>The authors would like to thank Beman Dawes and Howard Hinnant for their
helpful comments when preparing this article.</p>
<h4>References</h4>
<ol>
<li>Nathan C. Myers, C++ Report, June 1995.</li>
<li>The type traits library is based upon contributions by Steve Cleary, Beman
Dawes, Howard Hinnant and John Maddock: it can be found at www.boost.org.</li>
<li>A scalar type is an arithmetic type (i.e. a built-in integer or floating
point type), an enumeration type, a pointer, a pointer to member, or a
const- or volatile-qualified version of one of these types.</li>
<li>This quote is from Donald Knuth, ACM Computing Surveys, December 1974, pg
268.</li>
<li>The test code is available as part of the boost utility library (see
algo_opt_examples.cpp), the code was compiled with gcc 2.95 with all
optimisations turned on, tests were conducted on a 400MHz Pentium II machine
running Microsoft Windows 98.</li>
<li>John Maddock and Howard Hinnant have submitted a &quot;compressed_pair&quot;
library to Boost, which uses a technique similar to the one described here
to hold references. Their pair also uses type traits to determine if any of
the types are empty, and will derive instead of contain to conserve space --
hence the name &quot;compressed&quot;.</li>
<li>This is actually an issue with the C++ Core Language Working Group (issue
#106), submitted by Bjarne Stroustrup. The tentative resolution is to allow
a &quot;reference to a reference to T&quot; to mean the same thing as a
&quot;reference to T&quot;, but only in template instantiation, in a method
similar to multiple cv-qualifiers.</li>
<li>For those of you who are wondering why this shouldn't be const-qualified,
remember that references are always implicitly constant (for example, you
can't re-assign a reference). Remember also that &quot;const T &amp;&quot;
is something completely different. For this reason, cv-qualifiers on
template type arguments that are references are ignored.</li>
</ol>
<h2>Listing 1</h2>
<pre>namespace detail{
template &lt;bool b&gt;
struct copier
{
template&lt;typename I1, typename I2&gt;
static I2 do_copy(I1 first,
I1 last, I2 out);
};
template &lt;bool b&gt;
template&lt;typename I1, typename I2&gt;
I2 copier&lt;b&gt;::do_copy(I1 first,
I1 last,
I2 out)
{
while(first != last)
{
*out = *first;
++out;
++first;
}
return out;
}
template &lt;&gt;
struct copier&lt;true&gt;
{
template&lt;typename I1, typename I2&gt;
static I2* do_copy(I1* first, I1* last, I2* out)
{
memcpy(out, first, (last-first)*sizeof(I2));
return out+(last-first);
}
};
}
template&lt;typename I1, typename I2&gt;
inline I2 copy(I1 first, I1 last, I2 out)
{
typedef typename
boost::remove_cv&lt;
typename std::iterator_traits&lt;I1&gt;
::value_type&gt;::type v1_t;
typedef typename
boost::remove_cv&lt;
typename std::iterator_traits&lt;I2&gt;
::value_type&gt;::type v2_t;
enum{ can_opt =
boost::is_same&lt;v1_t, v2_t&gt;::value
&amp;&amp; boost::is_pointer&lt;I1&gt;::value
&amp;&amp; boost::is_pointer&lt;I2&gt;::value
&amp;&amp; boost::
has_trivial_assign&lt;v1_t&gt;::value
};
return detail::copier&lt;can_opt&gt;::
do_copy(first, last, out);
}</pre>
<hr>
<p><EFBFBD> Copyright John Maddock and Steve Cleary, 2000</p>
</body>
</html>

View File

@ -34,9 +34,9 @@ specialization or member templates, no benefit will occur from
using call_traits: the call_traits defined types will always be
the same as the existing practice in this case. In addition if
only member templates and not partial template specialisation is
support by the compiler (for example Visual C++ 6) then call_traits
can not be used with array types (although it can be used to
solve the reference to reference problem).</p>
support by the compiler (for example Visual C++ 6) then
call_traits can not be used with array types (although it can be
used to solve the reference to reference problem).</p>
<table border="0" cellpadding="7" cellspacing="1" width="797">
<tr>
@ -79,7 +79,8 @@ solve the reference to reference problem).</p>
</td>
</tr>
<tr>
<td valign="top" width="17%"><p align="center">const T&amp;<br>
<td valign="top" width="17%"><p align="center">const
T&amp;<br>
(return value)</p>
</td>
<td valign="top" width="35%"><p align="center"><code>call_traits&lt;T&gt;::const_reference</code></p>
@ -91,7 +92,8 @@ solve the reference to reference problem).</p>
</td>
</tr>
<tr>
<td valign="top" width="17%"><p align="center">const T&amp;<br>
<td valign="top" width="17%"><p align="center">const
T&amp;<br>
(function parameter)</p>
</td>
<td valign="top" width="35%"><p align="center"><code>call_traits&lt;T&gt;::param_type</code></p>
@ -332,8 +334,8 @@ possible:</p>
<p>The following table shows the effect that call_traits has on
various types, the table assumes that the compiler supports
partial specialization: if it doesn't then all types behave in
the same way as the entry for &quot;myclass&quot;, and call_traits
can not be used with reference or array types.</p>
the same way as the entry for &quot;myclass&quot;, and
call_traits can not be used with reference or array types.</p>
<table border="0" cellpadding="7" cellspacing="1" width="766">
<tr>
@ -388,7 +390,8 @@ can not be used with reference or array types.</p>
</td>
<td valign="top" width="17%"><p align="center">int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">const int&amp;</p>
<td valign="top" width="17%"><p align="center">const
int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">int const</p>
</td>
@ -420,7 +423,8 @@ can not be used with reference or array types.</p>
</td>
<td valign="top" width="17%"><p align="center">int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">const int&amp;</p>
<td valign="top" width="17%"><p align="center">const
int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">int&amp;</p>
</td>
@ -432,13 +436,17 @@ can not be used with reference or array types.</p>
<td valign="top" width="17%" bgcolor="#C0C0C0"><p
align="center">const int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">const int&amp;</p>
<td valign="top" width="17%"><p align="center">const
int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">const int&amp;</p>
<td valign="top" width="17%"><p align="center">const
int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">const int&amp;</p>
<td valign="top" width="17%"><p align="center">const
int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">const int&amp;</p>
<td valign="top" width="17%"><p align="center">const
int&amp;</p>
</td>
<td valign="top" width="17%"><p align="center">All
constant-references.</p>
@ -486,8 +494,8 @@ can not be used with reference or array types.</p>
<p>The following class is a trivial class that stores some type T
by value (see the <a href="call_traits_test.cpp">call_traits_test.cpp</a>
file), the aim is to illustrate how each of the available call_traits
typedefs may be used:</p>
file), the aim is to illustrate how each of the available
call_traits typedefs may be used:</p>
<pre>template &lt;class T&gt;
struct contained
@ -523,14 +531,14 @@ problem):</h4>
<pre>template &lt;class Operation&gt;
class binder1st :
public unary_function&lt;Operation::second_argument_type, Operation::result_type&gt;
public unary_function&lt;typename Operation::second_argument_type, typename Operation::result_type&gt;
{
protected:
Operation op;
Operation::first_argument_type value;
typename Operation::first_argument_type value;
public:
binder1st(const Operation&amp; x, const Operation::first_argument_type&amp; y);
Operation::result_type operator()(const Operation::second_argument_type&amp; x) const;
binder1st(const Operation&amp; x, const typename Operation::first_argument_type&amp; y);
typename Operation::result_type operator()(const typename Operation::second_argument_type&amp; x) const;
}; </pre>
<p>Now consider what happens in the relatively common case that
@ -541,7 +549,7 @@ reference to a reference as an argument, and that is not
currently legal. The solution here is to modify <code>operator()</code>
to use call_traits:</p>
<pre>Operation::result_type operator()(call_traits&lt;Operation::second_argument_type&gt;::param_type x) const;</pre>
<pre>typename Operation::result_type operator()(typename call_traits&lt;typename Operation::second_argument_type&gt;::param_type x) const;</pre>
<p>Now in the case that <code>Operation::second_argument_type</code>
is a reference type, the argument is passed as a reference, and
@ -575,16 +583,17 @@ std::pair&lt;
degraded to pointers if the deduced types are arrays, similar
situations occur in the standard binders and adapters: in
principle in any function that &quot;wraps&quot; a temporary
whose type is deduced. Note that the function arguments to make_pair
are not expressed in terms of call_traits: doing so would prevent
template argument deduction from functioning.</p>
whose type is deduced. Note that the function arguments to
make_pair are not expressed in terms of call_traits: doing so
would prevent template argument deduction from functioning.</p>
<h4><a name="ex4"></a>Example 4 (optimising fill):</h4>
<p>The call_traits template will &quot;optimize&quot; the passing
of a small built-in type as a function parameter, this mainly has
an effect when the parameter is used within a loop body. In the
following example (see <a href="algo_opt_examples.cpp">algo_opt_examples.cpp</a>),
following example (see <a
href="../type_traits/examples/fill_example.cpp">fill_example.cpp</a>),
a version of std::fill is optimized in two ways: if the type
passed is a single byte built-in type then std::memset is used to
effect the fill, otherwise a conventional C++ implemention is
@ -666,10 +675,10 @@ be any worse than existing practice.</p>
<p>Pointers follow the same rational as small built-in types.</p>
<p>For reference types the rational follows <a href="#refs">Example
2</a> - references to references are not allowed, so the call_traits
members must be defined such that these problems do not occur.
There is a proposal to modify the language such that &quot;a
reference to a reference is a reference&quot; (issue #106,
2</a> - references to references are not allowed, so the
call_traits members must be defined such that these problems do
not occur. There is a proposal to modify the language such that
&quot;a reference to a reference is a reference&quot; (issue #106,
submitted by Bjarne Stroustrup), call_traits&lt;T&gt;::value_type
and call_traits&lt;T&gt;::param_type both provide the same effect
as that proposal, without the need for a language change (in
@ -687,11 +696,11 @@ struct A
void foo(T t);
};</pre>
<p><font face="Times New Roman">In this case if we instantiate A&lt;int[2]&gt;
then the declared type of the parameter passed to member function
foo is int[2], but it's actual type is const int*, if we try to
use the type T within the function body, then there is a strong
likelyhood that our code will not compile:</font></p>
<p><font face="Times New Roman">In this case if we instantiate
A&lt;int[2]&gt; then the declared type of the parameter passed to
member function foo is int[2], but it's actual type is const int*,
if we try to use the type T within the function body, then there
is a strong likelyhood that our code will not compile:</font></p>
<pre>template &lt;class T&gt;
void A&lt;T&gt;::foo(T t)
@ -706,13 +715,13 @@ declared type:</p>
<pre>template &lt;class T&gt;
struct A
{
void foo(call_traits&lt;T&gt;::value_type t);
void foo(typename call_traits&lt;T&gt;::value_type t);
};
template &lt;class T&gt;
void A&lt;T&gt;::foo(call_traits&lt;T&gt;::value_type t)
void A&lt;T&gt;::foo(typename call_traits&lt;T&gt;::value_type t)
{
call_traits&lt;T&gt;::value_type dup(t); // OK even if T is an array type.
typename call_traits&lt;T&gt;::value_type dup(t); // OK even if T is an array type.
}</pre>
<p>For value_type (return by value), again only a pointer may be
@ -743,7 +752,8 @@ Hinnant and John Maddock.</p>
<p>Maintained by <a href="mailto:John_Maddock@compuserve.com">John
Maddock</a>, the latest version of this file can be found at <a
href="http://www.boost.org/">www.boost.org</a>, and the boost
discussion list at <a href="http://www.egroups.com/list/boost">www.egroups.com/list/boost</a>.</p>
discussion list at <a
href="http://www.yahoogroups.com/list/boost">www.yahoogroups.com/list/boost</a>.</p>
<p>.</p>

View File

@ -6,6 +6,8 @@
// warranty, and with no claim as to its suitability for any purpose.
// standalone test program for <boost/call_traits.hpp>
// 18 Mar 2002:
// Changed some names to prevent conflicts with some new type_traits additions.
// 03 Oct 2000:
// Enabled extra tests for VC6.
@ -16,7 +18,11 @@
#include <typeinfo>
#include <boost/call_traits.hpp>
#include "type_traits_test.hpp"
#include <boost/type_traits/type_traits_test.hpp>
// a way prevent warnings for unused variables
template<class T> inline void unused_variable(const T&) {}
//
// struct contained models a type that contains a type (for example std::pair)
// arrays are contained by value, and have to be treated as a special case:
@ -44,7 +50,7 @@ struct contained
reference get() { return v_; }
const_reference const_get()const { return v_; }
// pass value:
void call(param_type p){}
void call(param_type){}
};
@ -69,12 +75,12 @@ struct contained<T[N]>
// return by_ref:
reference get() { return v_; }
const_reference const_get()const { return v_; }
void call(param_type p){}
void call(param_type){}
};
#endif
template <class T>
contained<typename boost::call_traits<T>::value_type> wrap(const T& t)
contained<typename boost::call_traits<T>::value_type> test_wrap_type(const T& t)
{
typedef typename boost::call_traits<T>::value_type ct;
return contained<ct>(t);
@ -98,18 +104,18 @@ std::pair<
using namespace std;
//
// struct checker:
// struct call_traits_checker:
// verifies behaviour of contained example:
//
template <class T>
struct checker
struct call_traits_checker
{
typedef typename boost::call_traits<T>::param_type param_type;
void operator()(param_type);
};
template <class T>
void checker<T>::operator()(param_type p)
void call_traits_checker<T>::operator()(param_type p)
{
T t(p);
contained<T> c(t);
@ -117,18 +123,19 @@ void checker<T>::operator()(param_type p)
assert(t == c.value());
assert(t == c.get());
assert(t == c.const_get());
#ifndef __ICL
//cout << "typeof contained<" << typeid(T).name() << ">::v_ is: " << typeid(&contained<T>::v_).name() << endl;
cout << "typeof contained<" << typeid(T).name() << ">::value() is: " << typeid(&contained<T>::value).name() << endl;
cout << "typeof contained<" << typeid(T).name() << ">::get() is: " << typeid(&contained<T>::get).name() << endl;
cout << "typeof contained<" << typeid(T).name() << ">::const_get() is: " << typeid(&contained<T>::const_get).name() << endl;
cout << "typeof contained<" << typeid(T).name() << ">::call() is: " << typeid(&contained<T>::call).name() << endl;
cout << endl;
#endif
}
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class T, std::size_t N>
struct checker<T[N]>
struct call_traits_checker<T[N]>
{
typedef typename boost::call_traits<T[N]>::param_type param_type;
void operator()(param_type t)
@ -155,10 +162,10 @@ struct checker<T[N]>
//
// check_wrap:
template <class T, class U>
void check_wrap(const contained<T>& w, const U& u)
template <class W, class U>
void check_wrap(const W& w, const U& u)
{
cout << "checking contained<" << typeid(T).name() << ">..." << endl;
cout << "checking " << typeid(W).name() << "..." << endl;
assert(w.value() == u);
}
@ -176,42 +183,45 @@ void check_make_pair(T c, U u, V v)
}
struct UDT
struct comparible_UDT
{
int i_;
UDT() : i_(2){}
bool operator == (const UDT& v){ return v.i_ == i_; }
comparible_UDT() : i_(2){}
comparible_UDT(const comparible_UDT& other) : i_(other.i_){}
comparible_UDT& operator=(const comparible_UDT& other)
{
i_ = other.i_;
return *this;
}
bool operator == (const comparible_UDT& v){ return v.i_ == i_; }
};
int main()
int main(int argc, char *argv[ ])
{
checker<UDT> c1;
UDT u;
call_traits_checker<comparible_UDT> c1;
comparible_UDT u;
c1(u);
checker<int> c2;
call_traits_checker<int> c2;
int i = 2;
c2(i);
int* pi = &i;
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES) || !defined(BOOST_NO_MEMBER_TEMPLATES)
checker<int*> c3;
c3(pi);
checker<int&> c4;
c4(i);
checker<const int&> c5;
c5(i);
#if !defined (BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
int a[2] = {1,2};
checker<int[2]> c6;
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES) && !defined(__ICL)
call_traits_checker<int*> c3;
c3(pi);
call_traits_checker<int&> c4;
c4(i);
call_traits_checker<const int&> c5;
c5(i);
#if !defined (BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(__MWERKS__) && !defined(__SUNPRO_CC)
call_traits_checker<int[2]> c6;
c6(a);
#endif
#endif
check_wrap(wrap(2), 2);
const char ca[4] = "abc";
// compiler can't deduce this for some reason:
//check_wrap(wrap(ca), ca);
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
check_wrap(wrap(a), a);
check_wrap(test_wrap_type(2), 2);
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(__SUNPRO_CC)
check_wrap(test_wrap_type(a), a);
check_make_pair(test::make_pair(a, a), a, a);
#endif
@ -220,10 +230,10 @@ int main()
typedef int& r_type;
typedef const r_type cr_type;
type_test(UDT, boost::call_traits<UDT>::value_type)
type_test(UDT&, boost::call_traits<UDT>::reference)
type_test(const UDT&, boost::call_traits<UDT>::const_reference)
type_test(const UDT&, boost::call_traits<UDT>::param_type)
type_test(comparible_UDT, boost::call_traits<comparible_UDT>::value_type)
type_test(comparible_UDT&, boost::call_traits<comparible_UDT>::reference)
type_test(const comparible_UDT&, boost::call_traits<comparible_UDT>::const_reference)
type_test(const comparible_UDT&, boost::call_traits<comparible_UDT>::param_type)
type_test(int, boost::call_traits<int>::value_type)
type_test(int&, boost::call_traits<int>::reference)
type_test(const int&, boost::call_traits<int>::const_reference)
@ -232,12 +242,12 @@ int main()
type_test(int*&, boost::call_traits<int*>::reference)
type_test(int*const&, boost::call_traits<int*>::const_reference)
type_test(int*const, boost::call_traits<int*>::param_type)
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES) || !defined(BOOST_NO_MEMBER_TEMPLATES)
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES)
type_test(int&, boost::call_traits<int&>::value_type)
type_test(int&, boost::call_traits<int&>::reference)
type_test(const int&, boost::call_traits<int&>::const_reference)
type_test(int&, boost::call_traits<int&>::param_type)
#if !(defined(__GNUC__) && (__GNUC__ < 3))
#if !(defined(__GNUC__) && ((__GNUC__ < 3) || (__GNUC__ == 3) && (__GNUC_MINOR__ < 1)))
type_test(int&, boost::call_traits<cr_type>::value_type)
type_test(int&, boost::call_traits<cr_type>::reference)
type_test(const int&, boost::call_traits<cr_type>::const_reference)
@ -260,20 +270,28 @@ int main()
type_test(const int(&)[3], boost::call_traits<const int[3]>::reference)
type_test(const int(&)[3], boost::call_traits<const int[3]>::const_reference)
type_test(const int*const, boost::call_traits<const int[3]>::param_type)
// test with abstract base class:
type_test(test_abc1, boost::call_traits<test_abc1>::value_type)
type_test(test_abc1&, boost::call_traits<test_abc1>::reference)
type_test(const test_abc1&, boost::call_traits<test_abc1>::const_reference)
type_test(const test_abc1&, boost::call_traits<test_abc1>::param_type)
#else
std::cout << "You're compiler does not support partial template instantiation, skipping 8 tests (8 errors)" << std::endl;
failures += 8;
test_count += 8;
std::cout << "You're compiler does not support partial template specialiation, skipping 8 tests (8 errors)" << std::endl;
failures += 12;
test_count += 12;
#endif
#else
std::cout << "You're compiler does not support partial template instantiation, skipping 20 tests (20 errors)" << std::endl;
failures += 20;
test_count += 20;
std::cout << "You're compiler does not support partial template specialiation, skipping 20 tests (20 errors)" << std::endl;
failures += 24;
test_count += 24;
#endif
// test with an incomplete type:
type_test(incomplete_type, boost::call_traits<incomplete_type>::value_type)
type_test(incomplete_type&, boost::call_traits<incomplete_type>::reference)
type_test(const incomplete_type&, boost::call_traits<incomplete_type>::const_reference)
type_test(const incomplete_type&, boost::call_traits<incomplete_type>::param_type)
std::cout << std::endl << test_count << " tests completed (" << failures << " failures)... press any key to exit";
std::cin.get();
return failures;
return check_result(argc, argv);
}
//
@ -313,6 +331,19 @@ void call_traits_test<T, isarray>::assert_construct(typename call_traits_test<T,
param_type p2(v);
param_type p3(r);
param_type p4(p);
unused_variable(v2);
unused_variable(v3);
unused_variable(v4);
unused_variable(r2);
unused_variable(r3);
unused_variable(cr2);
unused_variable(cr3);
unused_variable(cr4);
unused_variable(cr5);
unused_variable(p2);
unused_variable(p3);
unused_variable(p4);
}
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <typename T>
@ -349,6 +380,19 @@ void call_traits_test<T, true>::assert_construct(typename boost::call_traits<T>:
param_type p2(v);
param_type p3(r);
param_type p4(p);
unused_variable(v2);
unused_variable(v3);
unused_variable(v4);
unused_variable(v5);
#ifndef __BORLANDC__
unused_variable(r2);
unused_variable(cr2);
#endif
unused_variable(cr3);
unused_variable(p2);
unused_variable(p3);
unused_variable(p4);
}
#endif //BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
//
@ -356,11 +400,31 @@ void call_traits_test<T, true>::assert_construct(typename boost::call_traits<T>:
template struct call_traits_test<int>;
template struct call_traits_test<const int>;
template struct call_traits_test<int*>;
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES) || !defined(BOOST_NO_MEMBER_TEMPLATES)
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES)
template struct call_traits_test<int&>;
template struct call_traits_test<const int&>;
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(__SUNPRO_CC)
template struct call_traits_test<int[2], true>;
#endif
#endif
#ifdef BOOST_MSVC
unsigned int expected_failures = 14;
#elif defined(__SUNPRO_CC)
#if(__SUNPRO_CC <= 0x520)
unsigned int expected_failures = 18;
#elif(__SUNPRO_CC < 0x530)
unsigned int expected_failures = 17;
#else
unsigned int expected_failures = 6;
#endif
#elif defined(__BORLANDC__)
unsigned int expected_failures = 2;
#elif (defined(__GNUC__) && ((__GNUC__ < 3) || (__GNUC__ == 3) && (__GNUC_MINOR__ < 1)))
unsigned int expected_failures = 4;
#elif defined(__HP_aCC)
unsigned int expected_failures = 24;
#else
unsigned int expected_failures = 0;
#endif

31
checked_delete_test.cpp Normal file
View File

@ -0,0 +1,31 @@
// Boost checked_delete test program ---------------------------------------//
// (C) Copyright Beman Dawes 2001. Permission to copy, use, modify, sell
// and distribute this software is granted provided this copyright
// notice appears in all copies. This software is provided "as is" without
// express or implied warranty, and with no claim as to its suitability for
// any purpose.
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 21 May 01 Initial version (Beman Dawes)
#include <boost/utility.hpp> // for checked_delete
// This program demonstrates compiler errors when trying to delete an
// incomplete type.
namespace
{
class Incomplete;
}
int main()
{
Incomplete * p;
boost::checked_delete(p); // should cause compile time error
Incomplete ** pa;
boost::checked_array_delete(pa); // should cause compile time error
return 0;
} // main

View File

@ -6,22 +6,23 @@ content="text/html; charset=iso-8859-1">
<meta name="Template"
content="C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\html.dot">
<meta name="GENERATOR" content="Microsoft FrontPage Express 2.0">
<title>Header <boost/compressed_pair.hpp></title>
<title>Header </title>
<boost/compressed_pair.hpp>
</head>
<body bgcolor="#FFFFFF" text="#000000" link="#0000FF"
vlink="#800080">
<h2><img src="../../c++boost.gif" width="276" height="86">Header
&lt;<a href="../../boost/detail/call_traits.hpp">boost/compressed_pair.hpp</a>&gt;</h2>
&lt;<a href="../../boost/detail/compressed_pair.hpp">boost/compressed_pair.hpp</a>&gt;</h2>
<p>All of the contents of &lt;boost/compressed_pair.hpp&gt; are
defined inside namespace boost.</p>
<p>The class compressed pair is very similar to std::pair, but if
either of the template arguments are empty classes, then the
&quot;empty member optimisation&quot; is applied to compress the
size of the pair.</p>
&quot;empty base-class optimisation&quot; is applied to compress
the size of the pair.</p>
<pre>template &lt;class T1, class T2&gt;
class compressed_pair
@ -41,6 +42,8 @@ public:
explicit compressed_pair(first_param_type x);
explicit compressed_pair(second_param_type y);
compressed_pair&amp; operator=(const compressed_pair&amp;);
first_reference first();
first_const_reference first() const;
@ -61,17 +64,19 @@ constructor, and this constructor initialises both values in the
pair to the passed value.</p>
<p>Note that compressed_pair can not be instantiated if either of
the template arguments is an enumerator type, unless there is
compiler support for boost::is_enum, or if boost::is_enum is
specialised for the enumerator type.</p>
the template arguments is a union type, unless there is compiler
support for boost::is_union, or if boost::is_union is specialised
for the union type.</p>
<p>Finally, compressed_pair requires compiler support for partial
specialisation of class templates - without that support
compressed_pair behaves just like std::pair.</p>
<p>Finally, a word of caution for Visual C++ 6 users: if either
argument is an empty type, then assigning to that member will
produce memory corruption, unless the empty type has a &quot;do
nothing&quot; assignment operator defined. This is due to a bug
in the way VC6 generates implicit assignment operators.</p>
<hr>
<p>Revised 08 March 2000</p>
<p>Revised 08 May 2001</p>
<p><EFBFBD> Copyright boost.org 2000. Permission to copy, use, modify,
sell and distribute this document is granted provided this
@ -85,7 +90,8 @@ Hinnant and John Maddock.</p>
<p>Maintained by <a href="mailto:John_Maddock@compuserve.com">John
Maddock</a>, the latest version of this file can be found at <a
href="http://www.boost.org">www.boost.org</a>, and the boost
discussion list at <a href="http://www.egroups.com/list/boost">www.egroups.com/list/boost</a>.</p>
discussion list at <a
href="http://www.yahoogroups.com/list/boost">www.yahoogroups.com/list/boost</a>.</p>
<p>&nbsp;</p>
</body>

View File

@ -14,15 +14,12 @@
#include <cassert>
#include <boost/compressed_pair.hpp>
#include "type_traits_test.hpp"
#include <boost/type_traits/type_traits_test.hpp>
#define BOOST_INCLUDE_MAIN
#include <boost/test/test_tools.hpp>
using namespace boost;
struct empty_POD_UDT{};
struct empty_UDT
{
~empty_UDT(){};
};
namespace boost {
#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
template <> struct is_empty<empty_UDT>
@ -59,100 +56,345 @@ struct non_empty2
{ return a.i == b.i; }
};
int main()
{
compressed_pair<int, double> cp1(1, 1.3);
assert(cp1.first() == 1);
assert(cp1.second() == 1.3);
compressed_pair<int, double> cp1b(2, 2.3);
assert(cp1b.first() == 2);
assert(cp1b.second() == 2.3);
swap(cp1, cp1b);
assert(cp1b.first() == 1);
assert(cp1b.second() == 1.3);
assert(cp1.first() == 2);
assert(cp1.second() == 2.3);
compressed_pair<non_empty1, non_empty2> cp1c(non_empty1(9));
assert(cp1c.second() == non_empty2());
assert(cp1c.first() == non_empty1(9));
compressed_pair<non_empty1, non_empty2> cp1d(non_empty2(9));
assert(cp1d.second() == non_empty2(9));
assert(cp1d.first() == non_empty1());
compressed_pair<int, double> cp1e(cp1);
compressed_pair<empty_UDT, int> cp2(2);
assert(cp2.second() == 2);
compressed_pair<int, empty_UDT> cp3(1);
assert(cp3.first() ==1);
compressed_pair<empty_UDT, empty_UDT> cp4;
compressed_pair<empty_UDT, empty_POD_UDT> cp5;
compressed_pair<int, empty_UDT> cp9(empty_UDT());
compressed_pair<int, empty_UDT> cp10(1);
assert(cp10.first() == 1);
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES) || !defined(BOOST_NO_MEMBER_TEMPLATES) || !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
int i = 0;
compressed_pair<int&, int&> cp6(i,i);
assert(cp6.first() == i);
assert(cp6.second() == i);
assert(&cp6.first() == &i);
assert(&cp6.second() == &i);
compressed_pair<int, double[2]> cp7;
cp7.first();
double* pd = cp7.second();
#ifdef __GNUC__
using std::swap;
#endif
value_test(true, (sizeof(compressed_pair<empty_UDT, int>) < sizeof(std::pair<empty_UDT, int>)))
value_test(true, (sizeof(compressed_pair<int, empty_UDT>) < sizeof(std::pair<int, empty_UDT>)))
value_test(true, (sizeof(compressed_pair<empty_UDT, empty_UDT>) < sizeof(std::pair<empty_UDT, empty_UDT>)))
value_test(true, (sizeof(compressed_pair<empty_UDT, empty_POD_UDT>) < sizeof(std::pair<empty_UDT, empty_POD_UDT>)))
value_test(true, (sizeof(compressed_pair<empty_UDT, compressed_pair<empty_POD_UDT, int> >) < sizeof(std::pair<empty_UDT, std::pair<empty_POD_UDT, int> >)))
std::cout << std::endl << test_count << " tests completed (" << failures << " failures)... press any key to exit";
std::cin.get();
return failures;
template <class T1, class T2>
struct compressed_pair_tester
{
// define the types we need:
typedef T1 first_type;
typedef T2 second_type;
typedef typename call_traits<first_type>::param_type first_param_type;
typedef typename call_traits<second_type>::param_type second_param_type;
// define our test proc:
static void test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4);
};
template <class T1, class T2>
void compressed_pair_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4)
{
#ifndef __GNUC__
// gcc 2.90 can't cope with function scope using
// declarations, and generates an internal compiler error...
using std::swap;
#endif
// default construct:
boost::compressed_pair<T1,T2> cp1;
// first param construct:
boost::compressed_pair<T1,T2> cp2(p1);
cp2.second() = p2;
BOOST_TEST(cp2.first() == p1);
BOOST_TEST(cp2.second() == p2);
// second param construct:
boost::compressed_pair<T1,T2> cp3(p2);
cp3.first() = p1;
BOOST_TEST(cp3.second() == p2);
BOOST_TEST(cp3.first() == p1);
// both param construct:
boost::compressed_pair<T1,T2> cp4(p1, p2);
BOOST_TEST(cp4.first() == p1);
BOOST_TEST(cp4.second() == p2);
boost::compressed_pair<T1,T2> cp5(p3, p4);
BOOST_TEST(cp5.first() == p3);
BOOST_TEST(cp5.second() == p4);
// check const members:
const boost::compressed_pair<T1,T2>& cpr1 = cp4;
BOOST_TEST(cpr1.first() == p1);
BOOST_TEST(cpr1.second() == p2);
// copy construct:
boost::compressed_pair<T1,T2> cp6(cp4);
BOOST_TEST(cp6.first() == p1);
BOOST_TEST(cp6.second() == p2);
// assignment:
cp1 = cp4;
BOOST_TEST(cp1.first() == p1);
BOOST_TEST(cp1.second() == p2);
cp1 = cp5;
BOOST_TEST(cp1.first() == p3);
BOOST_TEST(cp1.second() == p4);
// swap:
cp4.swap(cp5);
BOOST_TEST(cp4.first() == p3);
BOOST_TEST(cp4.second() == p4);
BOOST_TEST(cp5.first() == p1);
BOOST_TEST(cp5.second() == p2);
swap(cp4,cp5);
BOOST_TEST(cp4.first() == p1);
BOOST_TEST(cp4.second() == p2);
BOOST_TEST(cp5.first() == p3);
BOOST_TEST(cp5.second() == p4);
}
//
// instanciate some compressed pairs:
#ifdef __MWERKS__
template class compressed_pair<int, double>;
template class compressed_pair<int, int>;
template class compressed_pair<empty_UDT, int>;
template class compressed_pair<int, empty_UDT>;
template class compressed_pair<empty_UDT, empty_UDT>;
template class compressed_pair<empty_UDT, empty_POD_UDT>;
#else
template class boost::compressed_pair<int, double>;
template class boost::compressed_pair<int, int>;
template class boost::compressed_pair<empty_UDT, int>;
template class boost::compressed_pair<int, empty_UDT>;
template class boost::compressed_pair<empty_UDT, empty_UDT>;
template class boost::compressed_pair<empty_UDT, empty_POD_UDT>;
#endif
// tests for case where one or both
// parameters are reference types:
//
template <class T1, class T2>
struct compressed_pair_reference_tester
{
// define the types we need:
typedef T1 first_type;
typedef T2 second_type;
typedef typename call_traits<first_type>::param_type first_param_type;
typedef typename call_traits<second_type>::param_type second_param_type;
// define our test proc:
static void test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4);
};
template <class T1, class T2>
void compressed_pair_reference_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4)
{
#ifndef __GNUC__
// gcc 2.90 can't cope with function scope using
// declarations, and generates an internal compiler error...
using std::swap;
#endif
// both param construct:
boost::compressed_pair<T1,T2> cp4(p1, p2);
BOOST_TEST(cp4.first() == p1);
BOOST_TEST(cp4.second() == p2);
boost::compressed_pair<T1,T2> cp5(p3, p4);
BOOST_TEST(cp5.first() == p3);
BOOST_TEST(cp5.second() == p4);
// check const members:
const boost::compressed_pair<T1,T2>& cpr1 = cp4;
BOOST_TEST(cpr1.first() == p1);
BOOST_TEST(cpr1.second() == p2);
// copy construct:
boost::compressed_pair<T1,T2> cp6(cp4);
BOOST_TEST(cp6.first() == p1);
BOOST_TEST(cp6.second() == p2);
// assignment:
// VC6 bug:
// When second() is an empty class, VC6 performs the
// assignment by doing a memcpy - even though the empty
// class is really a zero sized base class, the result
// is that the memory of first() gets trampled over.
// Similar arguments apply to the case that first() is
// an empty base class.
// Strangely the problem is dependent upon the compiler
// settings - some generate the problem others do not.
cp4.first() = p3;
cp4.second() = p4;
BOOST_TEST(cp4.first() == p3);
BOOST_TEST(cp4.second() == p4);
}
//
// supplimentary tests for case where first arg only is a reference type:
//
template <class T1, class T2>
struct compressed_pair_reference1_tester
{
// define the types we need:
typedef T1 first_type;
typedef T2 second_type;
typedef typename call_traits<first_type>::param_type first_param_type;
typedef typename call_traits<second_type>::param_type second_param_type;
// define our test proc:
static void test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4);
};
template <class T1, class T2>
void compressed_pair_reference1_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
{
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
#ifndef __MWERKS__
// first param construct:
boost::compressed_pair<T1,T2> cp2(p1);
cp2.second() = p2;
BOOST_TEST(cp2.first() == p1);
BOOST_TEST(cp2.second() == p2);
#endif
}
//
// now some for which only a few specific members can be instantiated,
// first references:
template double& compressed_pair<double, int&>::first();
template int& compressed_pair<double, int&>::second();
#if !(defined(__GNUC__) && (__GNUC__ == 2) && (__GNUC_MINOR__ < 95))
template compressed_pair<double, int&>::compressed_pair(int&);
#endif
template compressed_pair<double, int&>::compressed_pair(call_traits<double>::param_type,int&);
// supplimentary tests for case where second arg only is a reference type:
//
// and then arrays:
#ifndef __BORLANDC__
template call_traits<int[2]>::reference compressed_pair<double, int[2]>::second();
template <class T1, class T2>
struct compressed_pair_reference2_tester
{
// define the types we need:
typedef T1 first_type;
typedef T2 second_type;
typedef typename call_traits<first_type>::param_type first_param_type;
typedef typename call_traits<second_type>::param_type second_param_type;
// define our test proc:
static void test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4);
};
template <class T1, class T2>
void compressed_pair_reference2_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
{
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
// second param construct:
boost::compressed_pair<T1,T2> cp3(p2);
cp3.first() = p1;
BOOST_TEST(cp3.second() == p2);
BOOST_TEST(cp3.first() == p1);
#endif
template call_traits<double>::reference compressed_pair<double, int[2]>::first();
#if !(defined(__GNUC__) && (__GNUC__ == 2) && (__GNUC_MINOR__ < 95))
template compressed_pair<double, int[2]>::compressed_pair(call_traits<double>::param_type);
#endif
template compressed_pair<double, int[2]>::compressed_pair();
#endif // __MWERKS__
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
}
//
// tests for where one or the other parameter is an array:
//
template <class T1, class T2>
struct compressed_pair_array1_tester
{
// define the types we need:
typedef T1 first_type;
typedef T2 second_type;
typedef typename call_traits<first_type>::param_type first_param_type;
typedef typename call_traits<second_type>::param_type second_param_type;
// define our test proc:
static void test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4);
};
template <class T1, class T2>
void compressed_pair_array1_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
{
// default construct:
boost::compressed_pair<T1,T2> cp1;
// second param construct:
boost::compressed_pair<T1,T2> cp3(p2);
cp3.first()[0] = p1[0];
BOOST_TEST(cp3.second() == p2);
BOOST_TEST(cp3.first()[0] == p1[0]);
// check const members:
const boost::compressed_pair<T1,T2>& cpr1 = cp3;
BOOST_TEST(cpr1.first()[0] == p1[0]);
BOOST_TEST(cpr1.second() == p2);
BOOST_TEST(sizeof(T1) == sizeof(cp1.first()));
}
template <class T1, class T2>
struct compressed_pair_array2_tester
{
// define the types we need:
typedef T1 first_type;
typedef T2 second_type;
typedef typename call_traits<first_type>::param_type first_param_type;
typedef typename call_traits<second_type>::param_type second_param_type;
// define our test proc:
static void test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4);
};
template <class T1, class T2>
void compressed_pair_array2_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
{
// default construct:
boost::compressed_pair<T1,T2> cp1;
// first param construct:
boost::compressed_pair<T1,T2> cp2(p1);
cp2.second()[0] = p2[0];
BOOST_TEST(cp2.first() == p1);
BOOST_TEST(cp2.second()[0] == p2[0]);
// check const members:
const boost::compressed_pair<T1,T2>& cpr1 = cp2;
BOOST_TEST(cpr1.first() == p1);
BOOST_TEST(cpr1.second()[0] == p2[0]);
BOOST_TEST(sizeof(T2) == sizeof(cp1.second()));
}
template <class T1, class T2>
struct compressed_pair_array_tester
{
// define the types we need:
typedef T1 first_type;
typedef T2 second_type;
typedef typename call_traits<first_type>::param_type first_param_type;
typedef typename call_traits<second_type>::param_type second_param_type;
// define our test proc:
static void test(first_param_type p1, second_param_type p2, first_param_type p3, second_param_type p4);
};
template <class T1, class T2>
void compressed_pair_array_tester<T1, T2>::test(first_param_type p1, second_param_type p2, first_param_type, second_param_type)
{
// default construct:
boost::compressed_pair<T1,T2> cp1;
cp1.first()[0] = p1[0];
cp1.second()[0] = p2[0];
BOOST_TEST(cp1.first()[0] == p1[0]);
BOOST_TEST(cp1.second()[0] == p2[0]);
// check const members:
const boost::compressed_pair<T1,T2>& cpr1 = cp1;
BOOST_TEST(cpr1.first()[0] == p1[0]);
BOOST_TEST(cpr1.second()[0] == p2[0]);
BOOST_TEST(sizeof(T1) == sizeof(cp1.first()));
BOOST_TEST(sizeof(T2) == sizeof(cp1.second()));
}
int test_main(int, char *[])
{
// declare some variables to pass to the tester:
non_empty1 ne1(2);
non_empty1 ne2(3);
non_empty2 ne3(4);
non_empty2 ne4(5);
empty_POD_UDT e1;
empty_UDT e2;
// T1 != T2, both non-empty
compressed_pair_tester<non_empty1,non_empty2>::test(ne1, ne3, ne2, ne4);
// T1 != T2, T2 empty
compressed_pair_tester<non_empty1,empty_POD_UDT>::test(ne1, e1, ne2, e1);
// T1 != T2, T1 empty
compressed_pair_tester<empty_POD_UDT,non_empty2>::test(e1, ne3, e1, ne4);
// T1 != T2, both empty
compressed_pair_tester<empty_POD_UDT,empty_UDT>::test(e1, e2, e1, e2);
// T1 == T2, both non-empty
compressed_pair_tester<non_empty1,non_empty1>::test(ne1, ne1, ne2, ne2);
// T1 == T2, both empty
compressed_pair_tester<empty_UDT,empty_UDT>::test(e2, e2, e2, e2);
// test references:
// T1 != T2, both non-empty
compressed_pair_reference_tester<non_empty1&,non_empty2>::test(ne1, ne3, ne2, ne4);
compressed_pair_reference_tester<non_empty1,non_empty2&>::test(ne1, ne3, ne2, ne4);
compressed_pair_reference1_tester<non_empty1&,non_empty2>::test(ne1, ne3, ne2, ne4);
compressed_pair_reference2_tester<non_empty1,non_empty2&>::test(ne1, ne3, ne2, ne4);
// T1 != T2, T2 empty
compressed_pair_reference_tester<non_empty1&,empty_POD_UDT>::test(ne1, e1, ne2, e1);
compressed_pair_reference1_tester<non_empty1&,empty_POD_UDT>::test(ne1, e1, ne2, e1);
// T1 != T2, T1 empty
compressed_pair_reference_tester<empty_POD_UDT,non_empty2&>::test(e1, ne3, e1, ne4);
compressed_pair_reference2_tester<empty_POD_UDT,non_empty2&>::test(e1, ne3, e1, ne4);
// T1 == T2, both non-empty
compressed_pair_reference_tester<non_empty1&,non_empty1&>::test(ne1, ne1, ne2, ne2);
// tests arrays:
non_empty1 nea1[2];
non_empty1 nea2[2];
non_empty2 nea3[2];
non_empty2 nea4[2];
nea1[0] = non_empty1(5);
nea2[0] = non_empty1(6);
nea3[0] = non_empty2(7);
nea4[0] = non_empty2(8);
// T1 != T2, both non-empty
compressed_pair_array1_tester<non_empty1[2],non_empty2>::test(nea1, ne3, nea2, ne4);
compressed_pair_array2_tester<non_empty1,non_empty2[2]>::test(ne1, nea3, ne2, nea4);
compressed_pair_array_tester<non_empty1[2],non_empty2[2]>::test(nea1, nea3, nea2, nea4);
// T1 != T2, T2 empty
compressed_pair_array1_tester<non_empty1[2],empty_POD_UDT>::test(nea1, e1, nea2, e1);
// T1 != T2, T1 empty
compressed_pair_array2_tester<empty_POD_UDT,non_empty2[2]>::test(e1, nea3, e1, nea4);
// T1 == T2, both non-empty
compressed_pair_array_tester<non_empty1[2],non_empty1[2]>::test(nea1, nea1, nea2, nea2);
return 0;
}
unsigned int expected_failures = 0;

325
counting_iterator.htm Normal file
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<html>
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<img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)"
align="center" width="277" height="86">
<h1>Counting Iterator Adaptor</h1>
Defined in header
<a href="../../boost/counting_iterator.hpp">boost/counting_iterator.hpp</a>
<p>
How would you fill up a vector with the numbers zero
through one hundred using <a
href="http://www.sgi.com/tech/stl/copy.html"><tt>std::copy()</tt></a>? The
only iterator operation missing from builtin integer types is an
<tt>operator*()</tt> that returns the current
value of the integer. The counting iterator adaptor adds this crucial piece of
functionality to whatever type it wraps. One can use the
counting iterator adaptor not only with integer types, but with any
type that is <tt>Incrementable</tt> (see type requirements <a href="#requirements">below</a>). The
following <b>pseudo-code</b> shows the general idea of how the
counting iterator is implemented.
</p>
<pre>
// inside a hypothetical counting_iterator class...
typedef Incrementable value_type;
value_type counting_iterator::operator*() const {
return this->base; // no dereference!
}
</pre>
All of the other operators of the counting iterator behave in the same
fashion as the <tt>Incrementable</tt> base type.
<h2>Synopsis</h2>
<pre>
namespace boost {
template &lt;class Incrementable&gt;
struct <a href="#counting_iterator_traits">counting_iterator_traits</a>;
template &lt;class Incrementable&gt;
struct <a href="#counting_iterator_generator">counting_iterator_generator</a>;
template &lt;class Incrementable&gt;
typename counting_iterator_generator&lt;Incrementable&gt;::type
<a href="#make_counting_iterator">make_counting_iterator</a>(Incrementable x);
}
</pre>
<hr>
<h2><a name="counting_iterator_generator">The Counting Iterator Type
Generator</a></h2>
The class template <tt>counting_iterator_generator&lt;Incrementable&gt;</tt> is a <a href="../../more/generic_programming.html#type_generator">type generator</a> for counting iterators.
<pre>
template &lt;class Incrementable&gt;
class counting_iterator_generator
{
public:
typedef <a href="./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt;...&gt; type;
};
</pre>
<h3>Example</h3>
In this example we use the counting iterator generator to create a
counting iterator, and count from zero to four.
<pre>
#include &lt;boost/config.hpp&gt;
#include &lt;iostream&gt;
#include &lt;boost/counting_iterator.hpp&gt;
int main(int, char*[])
{
// Example of using counting_iterator_generator
std::cout &lt;&lt; "counting from 0 to 4:" &lt;&lt; std::endl;
boost::counting_iterator_generator&lt;int&gt;::type first(0), last(4);
std::copy(first, last, std::ostream_iterator&lt;int&gt;(std::cout, " "));
std::cout &lt;&lt; std::endl;
// to be continued...
</pre>
The output from this part is:
<pre>
counting from 0 to 4:
0 1 2 3
</pre>
<h3>Template Parameters</h3>
<Table border>
<TR>
<TH>Parameter</TH><TH>Description</TH>
</TR>
<TR>
<TD><tt>Incrementable</tt></TD>
<TD>The type being wrapped by the adaptor.</TD>
</TR>
</Table>
<h3>Model of</h3>
If the <tt>Incrementable</tt> type has all of the functionality of a
<a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a> except the <tt>operator*()</tt>, then the counting
iterator will be a model of <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a>. If the <tt>Incrementable</tt> type has less
functionality, then the counting iterator will have correspondingly
less functionality.
<h3><a name="requirements">Type Requirements</a></h3>
The <tt>Incrementable</tt> type must be <a
href="http://www.sgi.com/tech/stl/DefaultConstructible.html">Default
Constructible</a>, <a href="./CopyConstructible.html">Copy
Constructible</a>, and <a href="./Assignable.html">Assignable</a>.
Also, the <tt>Incrementable</tt> type must provide access to an
associated <tt>difference_type</tt> and <tt>iterator_category</tt>
through the <a
href="#counting_iterator_traits"><tt>counting_iterator_traits</tt></a>
class.
<p>
Furthermore, if you wish to create a counting iterator that is a <a
href="http://www.sgi.com/tech/stl/ForwardIterator.html"> Forward
Iterator</a>, then the following expressions must be valid:
<pre>
Incrementable i, j;
++i // pre-increment
i == j // operator equal
</pre>
If you wish to create a counting iterator that is a <a
href="http://www.sgi.com/tech/stl/BidirectionalIterator.html">
Bidirectional Iterator</a>, then pre-decrement is also required:
<pre>
--i
</pre>
If you wish to create a counting iterator that is a <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html"> Random
Access Iterator</a>, then these additional expressions are also required:
<pre>
<a href="#counting_iterator_traits">counting_iterator_traits</a>&lt;Incrementable&gt;::difference_type n;
i += n
n = i - j
i < j
</pre>
<h3>Members</h3>
The counting iterator type implements the member functions and
operators required of the <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a> concept. In addition it has the following
constructor:
<pre>
counting_iterator_generator::type(const Incrementable&amp; i)
</pre>
<p>
<hr>
<p>
<h2><a name="make_counting_iterator">The Counting Iterator Object Generator</a></h2>
<pre>
template &lt;class Incrementable&gt;
typename counting_iterator_generator&lt;Incrementable&gt;::type
make_counting_iterator(Incrementable base);
</pre>
An <a href="../../more/generic_programming.html#object_generator">object
generator</a> function that provides a convenient way to create counting
iterators.<p>
<h3>Example</h3>
In this example we count from negative five to positive five, this
time using the <tt>make_counting_iterator()</tt> function to save some
typing.
<pre>
// continuing from previous example...
std::cout &lt;&lt; "counting from -5 to 4:" &lt;&lt; std::endl;
std::copy(boost::make_counting_iterator(-5),
boost::make_counting_iterator(5),
std::ostream_iterator&lt;int&gt;(std::cout, " "));
std::cout &lt;&lt; std::endl;
// to be continued...
</pre>
The output from this part is:
<pre>
counting from -5 to 4:
-5 -4 -3 -2 -1 0 1 2 3 4
</pre>
In the next example we create an array of numbers, and then create a
second array of pointers, where each pointer is the address of a
number in the first array. The counting iterator makes it easy to do
this since dereferencing a counting iterator that is wrapping an
iterator over the array of numbers just returns a pointer to the
current location in the array. We then use the <a
href="./indirect_iterator.htm">indirect iterator adaptor</a> to print
out the number in the array by accessing the numbers through the array
of pointers.
<pre>
// continuing from previous example...
const int N = 7;
std::vector&lt;int&gt; numbers;
// Fill "numbers" array with [0,N)
std::copy(boost::make_counting_iterator(0), boost::make_counting_iterator(N),
std::back_inserter(numbers));
std::vector&lt;std::vector&lt;int&gt;::iterator&gt; pointers;
// Use counting iterator to fill in the array of pointers.
std::copy(boost::make_counting_iterator(numbers.begin()),
boost::make_counting_iterator(numbers.end()),
std::back_inserter(pointers));
// Use indirect iterator to print out numbers by accessing
// them through the array of pointers.
std::cout &lt;&lt; "indirectly printing out the numbers from 0 to "
&lt;&lt; N &lt;&lt; std::endl;
std::copy(boost::make_indirect_iterator(pointers.begin()),
boost::make_indirect_iterator(pointers.end()),
std::ostream_iterator&lt;int&gt;(std::cout, " "));
std::cout &lt;&lt; std::endl;
</pre>
The output is:
<pre>
indirectly printing out the numbers from 0 to 7
0 1 2 3 4 5 6
</pre>
<hr>
<h2><a name="counting_iterator_traits">Counting Iterator Traits</a></h2>
The counting iterator adaptor needs to determine the appropriate
<tt>difference_type</tt> and <tt>iterator_category</tt> to use based on the
<tt>Incrementable</tt> type supplied by the user. The
<tt>counting_iterator_traits</tt> class provides these types. If the
<tt>Incrementable</tt> type is an integral type or an iterator, these types
will be correctly deduced by the <tt>counting_iterator_traits</tt> provided by
the library. Otherwise, the user must specialize
<tt>counting_iterator_traits</tt> for her type or add nested typedefs to
her type to fulfill the needs of
<a href="http://www.sgi.com/tech/stl/iterator_traits.html">
<tt>std::iterator_traits</tt></a>.
<p>The following pseudocode describes how the <tt>counting_iterator_traits</tt> are determined:
<pre>
template &lt;class Incrementable&gt;
struct counting_iterator_traits
{
if (numeric_limits&lt;Incrementable&gt::is_specialized) {
if (!numeric_limits&lt;Incrementable&gt::is_integer)
COMPILE_TIME_ERROR;
if (!numeric_limits&lt;Incrementable&gt::is_bounded
&amp;&amp; numeric_limits&lt;Incrementable&gt;::is_signed) {
typedef Incrementable difference_type;
}
else if (numeric_limits&lt;Incrementable&gt::is_integral) {
typedef <i>next-larger-signed-type-or-intmax_t</i> difference_type;
}
typedef std::random_access_iterator_tag iterator_category;
} else {
typedef std::iterator_traits&lt;Incrementable&gt;::difference_type difference_type;
typedef std::iterator_traits&lt;Incrementable&gt;::iterator_category iterator_category;
}
};
</pre>
<p>The italicized sections above are implementation details, but it is important
to know that the <tt>difference_type</tt> for integral types is selected so that
it can always represent the difference between two values if such a built-in
integer exists. On platforms with a working <tt>std::numeric_limits</tt>
implementation, the <tt>difference_type</tt> for any variable-length signed
integer type <tt>T</tt> is <tt>T</tt> itself.
<hr>
<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan -->19 Aug 2001<!--webbot bot="Timestamp" endspan i-checksum="14767" --></p>
<p><EFBFBD> Copyright Jeremy Siek 2000. Permission to copy, use,
modify, sell and distribute this document is granted provided this copyright
notice appears in all copies. This document is provided &quot;as is&quot;
without express or implied warranty, and with no claim as to its suitability for
any purpose.</p>
</body>
</html>
<!-- LocalWords: html charset alt gif hpp incrementable const namespace htm
-->
<!-- LocalWords: struct typename iostream int Siek CopyConstructible pre
-->

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// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
#include <boost/config.hpp>
#include <iostream>
#include <iterator>
#include <vector>
#include <boost/counting_iterator.hpp>
#include <boost/iterator_adaptors.hpp>
int main(int, char*[])
{
// Example of using counting_iterator_generator
std::cout << "counting from 0 to 4:" << std::endl;
boost::counting_iterator_generator<int>::type first(0), last(4);
std::copy(first, last, std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
// Example of using make_counting_iterator()
std::cout << "counting from -5 to 4:" << std::endl;
std::copy(boost::make_counting_iterator(-5),
boost::make_counting_iterator(5),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
// Example of using counting iterator to create an array of pointers.
const int N = 7;
std::vector<int> numbers;
// Fill "numbers" array with [0,N)
std::copy(boost::make_counting_iterator(0), boost::make_counting_iterator(N),
std::back_inserter(numbers));
std::vector<std::vector<int>::iterator> pointers;
// Use counting iterator to fill in the array of pointers.
// causes an ICE with MSVC6
#if !defined(BOOST_MSVC) || (BOOST_MSVC > 1200)
std::copy(boost::make_counting_iterator(numbers.begin()),
boost::make_counting_iterator(numbers.end()),
std::back_inserter(pointers));
#endif
#if !defined(BOOST_MSVC) || (BOOST_MSVC > 1300)
// Use indirect iterator to print out numbers by accessing
// them through the array of pointers.
std::cout << "indirectly printing out the numbers from 0 to "
<< N << std::endl;
std::copy(boost::make_indirect_iterator(pointers.begin()),
boost::make_indirect_iterator(pointers.end()),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
#endif
return 0;
}

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@ -6,6 +6,11 @@
// See http://www.boost.org for most recent version including documentation.
//
// Revision History
// 16 Feb 2001 Added a missing const. Made the tests run (somewhat) with
// plain MSVC again. (David Abrahams)
// 11 Feb 2001 #if 0'd out use of counting_iterator on non-numeric types in
// MSVC without STLport, so that the other tests may proceed
// (David Abrahams)
// 04 Feb 2001 Added use of iterator_tests.hpp (David Abrahams)
// 28 Jan 2001 Removed not_an_iterator detritus (David Abrahams)
// 24 Jan 2001 Initial revision (David Abrahams)
@ -18,10 +23,13 @@
#include <boost/pending/iterator_tests.hpp>
#include <boost/counting_iterator.hpp>
#include <boost/detail/iterator.hpp>
#include <iostream>
#include <climits>
#include <iterator>
#include <stdlib.h>
#include <boost/utility.hpp>
#ifndef __BORLANDC__
# include <boost/tuple/tuple.hpp>
#endif
#include <vector>
#include <list>
#include <cassert>
@ -66,8 +74,12 @@ void category_test(
// Try some binary searches on the range to show that it's ordered
assert(std::binary_search(start, finish, *internal));
CountingIterator x,y;
boost::tie(x,y) = std::equal_range(start, finish, *internal);
// #including tuple crashed borland, so I had to give up on tie().
std::pair<CountingIterator,CountingIterator> xy(
std::equal_range(start, finish, *internal));
CountingIterator x = xy.first, y = xy.second;
assert(boost::detail::distance(x, y) == 1);
// Show that values outside the range can't be found
@ -146,7 +158,7 @@ template <class Container>
void test_container(Container* = 0) // default arg works around MSVC bug
{
Container c(1 + (unsigned)rand() % 1673);
const typename Container::iterator start = c.begin();
// back off by 1 to leave room for dereferenceable value at the end
@ -154,11 +166,67 @@ void test_container(Container* = 0) // default arg works around MSVC bug
std::advance(finish, c.size() - 1);
test(start, finish);
test(static_cast<typename Container::const_iterator>(start),
static_cast<typename Container::const_iterator>(finish));
typedef typename Container::const_iterator const_iterator;
test(const_iterator(start), const_iterator(finish));
}
class my_int1 {
public:
my_int1() { }
my_int1(int x) : m_int(x) { }
my_int1& operator++() { ++m_int; return *this; }
bool operator==(const my_int1& x) const { return m_int == x.m_int; }
private:
int m_int;
};
namespace boost {
template <>
struct counting_iterator_traits<my_int1> {
typedef std::ptrdiff_t difference_type;
typedef std::forward_iterator_tag iterator_category;
};
}
class my_int2 {
public:
typedef void value_type;
typedef void pointer;
typedef void reference;
typedef std::ptrdiff_t difference_type;
typedef std::bidirectional_iterator_tag iterator_category;
my_int2() { }
my_int2(int x) : m_int(x) { }
my_int2& operator++() { ++m_int; return *this; }
my_int2& operator--() { --m_int; return *this; }
bool operator==(const my_int2& x) const { return m_int == x.m_int; }
private:
int m_int;
};
class my_int3 {
public:
typedef void value_type;
typedef void pointer;
typedef void reference;
typedef std::ptrdiff_t difference_type;
typedef std::random_access_iterator_tag iterator_category;
my_int3() { }
my_int3(int x) : m_int(x) { }
my_int3& operator++() { ++m_int; return *this; }
my_int3& operator+=(std::ptrdiff_t n) { m_int += n; return *this; }
std::ptrdiff_t operator-(const my_int3& x) const { return m_int - x.m_int; }
my_int3& operator--() { --m_int; return *this; }
bool operator==(const my_int3& x) const { return m_int == x.m_int; }
bool operator!=(const my_int3& x) const { return m_int != x.m_int; }
bool operator<(const my_int3& x) const { return m_int < x.m_int; }
private:
int m_int;
};
int main()
{
// Test the built-in integer types.
@ -172,18 +240,30 @@ int main()
test_integer<unsigned int>();
test_integer<long>();
test_integer<unsigned long>();
#if defined(ULLONG_MAX) || defined(ULONG_LONG_MAX)
#if defined(BOOST_HAS_LONG_LONG)
test_integer<long long>();
test_integer<unsigned long long>();
#endif
// Some tests on container iterators, to prove we handle a few different categories
// wrapping an iterator or non-built-in integer type causes an INTERNAL
// COMPILER ERROR in MSVC without STLport. I'm clueless as to why.
#if !defined(BOOST_MSVC) || BOOST_MSVC > 1200 || defined(__SGI_STL_PORT)
// Test user-defined type.
test_integer<my_int1>();
test_integer<my_int2>();
test_integer<my_int3>();
// Some tests on container iterators, to prove we handle a few different categories
test_container<std::vector<int> >();
test_container<std::list<int> >();
#ifndef BOOST_NO_SLIST
# ifndef BOOST_NO_SLIST
test_container<BOOST_STD_EXTENSION_NAMESPACE::slist<int> >();
#endif
# endif
// Also prove that we can handle raw pointers.
int array[2000];
test(boost::make_counting_iterator(array), boost::make_counting_iterator(array+2000-1));
#endif
std::cout << "test successful " << std::endl;
return 0;
}

32
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@ -0,0 +1,32 @@
#if defined(_MSC_VER) && !defined(__ICL)
#pragma warning(disable: 4786) // identifier truncated in debug info
#pragma warning(disable: 4710) // function not inlined
#pragma warning(disable: 4711) // function selected for automatic inline expansion
#pragma warning(disable: 4514) // unreferenced inline removed
#endif
//
// current_function_test.cpp - a test for boost/current_function.hpp
//
// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
#include <boost/current_function.hpp>
#include <cstdio>
void message(char const * file, long line, char const * func, char const * msg)
{
std::printf("%s(%ld): %s in function '%s'\n", file, line, msg, func);
}
#define MESSAGE(msg) message(__FILE__, __LINE__, BOOST_CURRENT_FUNCTION, msg)
int main()
{
MESSAGE("assertion failed");
}

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Filter Iterator Adaptor Documentation</title>
</head>
<body bgcolor="#FFFFFF" text="#000000">
<img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)"
align="center" width="277" height="86">
<h1>Filter Iterator Adaptor</h1>
Defined in header
<a href="../../boost/iterator_adaptors.hpp">boost/iterator_adaptors.hpp</a>
<p>
The filter iterator adaptor creates a view of an iterator range in
which some elements of the range are skipped over. A <a
href="http://www.sgi.com/tech/stl/Predicate.html">Predicate</a>
function object controls which elements are skipped. When the
predicate is applied to an element, if it returns <tt>true</tt> then
the element is retained and if it returns <tt>false</tt> then the
element is skipped over.
<h2>Synopsis</h2>
<pre>
namespace boost {
template &lt;class Predicate, class BaseIterator, ...&gt;
class filter_iterator_generator;
template &lt;class Predicate, class BaseIterator&gt;
typename filter_iterator_generator&lt;Predicate, BaseIterator&gt;::type
make_filter_iterator(BaseIterator first, BaseIterator last, const Predicate& p = Predicate());
}
</pre>
<hr>
<h2><a name="filter_iterator_generator">The Filter Iterator Type
Generator</a></h2>
The class <tt>filter_iterator_generator</tt> is a helper class whose
purpose is to construct a filter iterator type. The template
parameters for this class are the <tt>Predicate</tt> function object
type and the <tt>BaseIterator</tt> type that is being wrapped. In
most cases the associated types for the wrapped iterator can be
deduced from <tt>std::iterator_traits</tt>, but in some situations the
user may want to override these types, so there are also template
parameters for each of the iterator's associated types.
<pre>
template &lt;class Predicate, class BaseIterator,
class Value, class Reference, class Pointer, class Category, class Distance>
class filter_iterator_generator
{
public:
typedef <tt><a href="./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt...&gt;</tt> type; // the resulting filter iterator type
}
</pre>
<h3>Example</h3>
The following example uses filter iterator to print out all the
positive integers in an array.
<pre>
struct is_positive_number {
bool operator()(int x) { return 0 &lt; x; }
};
int main() {
int numbers[] = { 0, -1, 4, -3, 5, 8, -2 };
const int N = sizeof(numbers)/sizeof(int);
typedef boost::filter_iterator_generator&lt;is_positive_number, int*, int&gt;::type FilterIter;
is_positive_number predicate;
FilterIter::policies_type policies(predicate, numbers + N);
FilterIter filter_iter_first(numbers, policies);
FilterIter filter_iter_last(numbers + N, policies);
std::copy(filter_iter_first, filter_iter_last, std::ostream_iterator&lt;int&gt;(std::cout, " "));
std::cout &lt;&lt; std::endl;
return 0;
}
</pre>
The output is:
<pre>
4 5 8
</pre>
<h3>Template Parameters</h3>
<Table border>
<TR>
<TH>Parameter</TH><TH>Description</TH>
</TR>
<TR>
<TD><a href="http://www.sgi.com/tech/stl/Predicate.html"><tt>Predicate</tt></a></TD>
<TD>The function object that determines which elements are retained and which elements are skipped.
</TR>
<TR>
<TD><tt>BaseIterator</tt></TD>
<TD>The iterator type being wrapped. This type must at least be a model
of the <a href="http://www.sgi.com/tech/stl/InputIterator">InputIterator</a> concept.</TD>
</TR>
<TR>
<TD><tt>Value</tt></TD>
<TD>The <tt>value_type</tt> of the resulting iterator,
unless const. If const, a conforming compiler strips constness for the
<tt>value_type</tt>. Typically the default for this parameter is the
appropriate type<a href="#1">[1]</a>.<br> <b>Default:</b>
<tt>std::iterator_traits&lt;BaseIterator&gt;::value_type</TD>
</TR>
<TR>
<TD><tt>Reference</tt></TD>
<TD>The <tt>reference</tt> type of the resulting iterator, and in
particular, the result type of <tt>operator*()</tt>. Typically the default for
this parameter is the appropriate type.<br> <b>Default:</b> If
<tt>Value</tt> is supplied, <tt>Value&amp;</tt> is used. Otherwise
<tt>std::iterator_traits&lt;BaseIterator&gt;::reference</tt> is
used.</TD>
</TR>
<TR>
<TD><tt>Pointer</tt></TD>
<TD>The <tt>pointer</tt> type of the resulting iterator, and in
particular, the result type of <tt>operator->()</tt>.
Typically the default for
this parameter is the appropriate type.<br>
<b>Default:</b> If <tt>Value</tt> was supplied, then <tt>Value*</tt>,
otherwise <tt>std::iterator_traits&lt;BaseIterator&gt;::pointer</tt>.</TD>
</TR>
<TR>
<TD><tt>Category</tt></TD>
<TD>The <tt>iterator_category</tt> type for the resulting iterator.
Typically the
default for this parameter is the appropriate type. If you override
this parameter, do not use <tt>bidirectional_iterator_tag</tt>
because filter iterators can not go in reverse.<br>
<b>Default:</b> <tt>std::iterator_traits&lt;BaseIterator&gt;::iterator_category</tt></TD>
</TR>
<TR>
<TD><tt>Distance</tt></TD>
<TD>The <tt>difference_type</tt> for the resulting iterator. Typically the default for
this parameter is the appropriate type.<br>
<b>Default:</b> <tt>std::iterator_traits&lt;BaseIterator&gt;::difference_type</TD>
</TR>
</table>
<h3>Model of</h3>
The filter iterator adaptor (the type
<tt>filter_iterator_generator<...>::type</tt>) may be a model of <a
href="http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a> or <a
href="http://www.sgi.com/tech/stl/ForwardIterator.html">ForwardIterator</a>
depending on the adapted iterator type.
<h3>Members</h3>
The filter iterator type implements all of the member functions and
operators required of the <a
href="http://www.sgi.com/tech/stl/ForwardIterator.html">ForwardIterator</a>
concept. In addition it has the following constructor:
<pre>filter_iterator_generator::type(const BaseIterator& it, const Policies& p = Policies())</pre>
<p>
The policies type has only one public function, which is its constructor:
<pre>filter_iterator_generator::policies_type(const Predicate& p, const BaseIterator& end)</pre>
<p>
<hr>
<p>
<h2><a name="make_filter_iterator">The Make Filter Iterator Function</a></h2>
<pre>
template &lt;class Predicate, class BaseIterator&gt;
typename filter_generator&lt;Predicate, BaseIterator&gt;::type
make_filter_iterator(BaseIterator first, BaseIterator last, const Predicate& p = Predicate())
</pre>
This function provides a convenient way to create filter iterators.
<h3>Example</h3>
In this example we print out all numbers in the array that are
greater than negative two.
<pre>
int main()
{
int numbers[] = { 0, -1, 4, -3, 5, 8, -2 };
const int N = sizeof(numbers)/sizeof(int);
std::copy(boost::make_filter_iterator(numbers, numbers + N,
std::bind2nd(std::greater<int>(), -2)),
boost::make_filter_iterator(numbers + N, numbers + N,
std::bind2nd(std::greater<int>(), -2)),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
}
</pre>
The output is:
<pre>
0 -1 4 5 8
</pre>
<p>
In the next example we print the positive numbers using the
<tt>make_filter_iterator()</tt> function.
<pre>
struct is_positive_number {
bool operator()(int x) { return 0 &lt; x; }
};
int main()
{
int numbers[] = { 0, -1, 4, -3, 5, 8, -2 };
const int N = sizeof(numbers)/sizeof(int);
std::copy(boost::make_filter_iterator&lt;is_positive_number&gt;(numbers, numbers + N),
boost::make_filter_iterator&lt;is_positive_number&gt;(numbers + N, numbers + N),
std::ostream_iterator&lt;int&gt;(std::cout, " "));
std::cout &lt;&lt; std::endl;
return 0;
}
</pre>
The output is:
<pre>
4 5 8
</pre>
<h3>Notes</h3>
<a name="1">[1]</a> If the compiler does not support partial
specialization and the wrapped iterator type is a builtin pointer then
the <tt>Value</tt> type must be explicitly specified (don't use the
default).
<hr>
<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan -->09 Mar 2001<!--webbot bot="Timestamp" endspan i-checksum="14894" --></p>
<p><EFBFBD> Copyright Jeremy Siek 2000. Permission to copy, use,
modify, sell and distribute this document is granted provided this copyright
notice appears in all copies. This document is provided &quot;as is&quot;
without express or implied warranty, and with no claim as to its suitability for
any purpose.</p>
</body>
</html>

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@ -0,0 +1,61 @@
// Example of using the filter iterator adaptor from
// boost/iterator_adaptors.hpp.
// (C) Copyright Jeremy Siek 1999. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
#include <boost/config.hpp>
#include <algorithm>
#include <functional>
#include <iostream>
#include <boost/iterator_adaptors.hpp>
struct is_positive_number {
bool operator()(int x) { return 0 < x; }
};
int main()
{
int numbers_[] = { 0, -1, 4, -3, 5, 8, -2 };
const int N = sizeof(numbers_)/sizeof(int);
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
// Assume there won't be proper iterator traits for pointers. This
// is just a wrapper for int* which has the right traits.
typedef boost::iterator_adaptor<int*, boost::default_iterator_policies, int> base_iterator;
#else
typedef int* base_iterator;
#endif
base_iterator numbers(numbers_);
// Example using make_filter_iterator()
std::copy(boost::make_filter_iterator<is_positive_number>(numbers, numbers + N),
boost::make_filter_iterator<is_positive_number>(numbers + N, numbers + N),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
// Example using filter_iterator_generator
typedef boost::filter_iterator_generator<is_positive_number, base_iterator, int>::type
FilterIter;
is_positive_number predicate;
FilterIter::policies_type policies(predicate, numbers + N);
FilterIter filter_iter_first(numbers, policies);
FilterIter filter_iter_last(numbers + N, policies);
std::copy(filter_iter_first, filter_iter_last, std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
// Another example using make_filter_iterator()
std::copy(boost::make_filter_iterator(numbers, numbers + N,
std::bind2nd(std::greater<int>(), -2)),
boost::make_filter_iterator(numbers + N, numbers + N,
std::bind2nd(std::greater<int>(), -2)),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
return 0;
}

41
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@ -0,0 +1,41 @@
// (C) Copyright Jeremy Siek 2001. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// Revision History:
// 27 Feb 2001 Jeremy Siek
// Initial checkin.
#include <iostream>
#include <string>
#include <vector>
#include <boost/function_output_iterator.hpp>
struct string_appender {
string_appender(std::string& s) : m_str(s) { }
void operator()(const std::string& x) const {
m_str += x;
}
std::string& m_str;
};
int main(int, char*[])
{
std::vector<std::string> x;
x.push_back("hello");
x.push_back(" ");
x.push_back("world");
x.push_back("!");
std::string s = "";
std::copy(x.begin(), x.end(),
boost::make_function_output_iterator(string_appender(s)));
std::cout << s << std::endl;
return 0;
}

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<meta name="generator" content="HTML Tidy, see www.w3.org">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Function Output Iterator Adaptor Documentation</title>
</head>
<body bgcolor="#FFFFFF" text="#000000">
<img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align=
"center" width="277" height="86">
<h1>Function Output Iterator Adaptor</h1>
Defined in header <a href=
"../../boost/function_output_iterator.hpp">boost/function_output_iterator.hpp</a>
<p>The function output iterator adaptor makes it easier to create
custom output iterators. The adaptor takes a <a
href="http://www.sgi.com/tech/stl/UnaryFunction.html">Unary
Function</a> and creates a model of <a
href="http://www.sgi.com/tech/stl/OutputIterator.html">Output
Iterator</a>. Each item assigned to the output iterator is passed
as an argument to the unary function. The motivation for this
iterator is that creating a C++ Standard conforming output
iterator is non-trivial, particularly because the proper
implementation usually requires a proxy object. On the other hand,
creating a function (or function object) is much simpler.
<h2>Synopsis</h2>
<blockquote>
<pre>
namespace boost {
template &lt;class UnaryFunction&gt;
class function_output_iterator;
template &lt;class UnaryFunction&gt;
function_output_iterator&lt;UnaryFunction&gt;
make_function_output_iterator(const UnaryFunction&amp; f = UnaryFunction())
}
</pre>
</blockquote>
<h3>Example</h3>
In this example we create an output iterator that appends
each item onto the end of a string, using the <tt>string_appender</tt>
function.
<blockquote>
<pre>
#include &lt;iostream&gt;
#include &lt;string&gt;
#include &lt;vector&gt;
#include &lt;boost/function_output_iterator.hpp&gt;
struct string_appender {
string_appender(std::string&amp; s) : m_str(s) { }
void operator()(const std::string&amp; x) const {
m_str += x;
}
std::string&amp; m_str;
};
int main(int, char*[])
{
std::vector&lt;std::string&gt; x;
x.push_back("hello");
x.push_back(" ");
x.push_back("world");
x.push_back("!");
std::string s = "";
std::copy(x.begin(), x.end(),
boost::make_function_output_iterator(string_appender(s)));
std::cout &lt;&lt; s &lt;&lt; std::endl;
return 0;
}
</pre>
</blockquote>
<hr>
<h2><a name="function_output_iterator">The Function Output Iterator Class</a></h2>
<blockquote>
<pre>
template &lt;class UnaryFunction&gt;
class function_output_iterator;
</pre>
</blockquote>
The <tt>function_output_iterator</tt> class creates an <a
href="http://www.sgi.com/tech/stl/OutputIterator.html">Output
Iterator</a> out of a
<a href="http://www.sgi.com/tech/stl/UnaryFunction.html">Unary
Function</a>. Each item assigned to the output iterator is passed
as an argument to the unary function.
<h3>Template Parameters</h3>
<table border>
<tr>
<th>Parameter
<th>Description
<tr>
<td><tt>UnaryFunction</tt>
<td>The function type being wrapped. The return type of the
function is not used, so it can be <tt>void</tt>. The
function must be a model of <a
href="http://www.sgi.com/tech/stl/UnaryFunction.html">Unary
Function</a>.</td>
</table>
<h3>Concept Model</h3>
The function output iterator class is a model of <a
href="http://www.sgi.com/tech/stl/OutputIterator.html">Output
Iterator</a>.
<h2>Members</h3>
The function output iterator implements the member functions
and operators required of the <a
href="http://www.sgi.com/tech/stl/OutputIterator.html">Output
Iterator</a> concept. In addition it has the following constructor:
<pre>
explicit function_output_iterator(const UnaryFunction& f = UnaryFunction())
</pre>
<br>
<br>
<hr>
<h2><a name="make_function_output_iterator">The Function Output Iterator Object
Generator</a></h2>
The <tt>make_function_output_iterator()</tt> function provides a
more convenient way to create function output iterator objects. The
function saves the user the trouble of explicitly writing out the
iterator types. If the default argument is used, the function
type must be provided as an explicit template argument.
<blockquote>
<pre>
template &lt;class UnaryFunction&gt;
function_output_iterator&lt;UnaryFunction&gt;
make_function_output_iterator(const UnaryFunction&amp; f = UnaryFunction())
</pre>
</blockquote>
<hr>
<p>&copy; Copyright Jeremy Siek 2001. Permission to copy, use,
modify, sell and distribute this document is granted provided this
copyright notice appears in all copies. This document is provided
"as is" without express or implied warranty, and with no claim as
to its suitability for any purpose.
</body>
</html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<title>Generator Iterator Adaptor Documentation</title>
</head>
<body bgcolor="#FFFFFF" text="#000000">
<img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="center" width="277" height="86">
<h1>Generator Iterator Adaptor</h1>
Defined in header <a href="../../boost/generator_iterator.hpp">boost/generator_iterator.hpp</a>
<p>
The generator iterator adaptor makes it easier to create custom input
iterators from 0-ary functions and function objects. The adaptor
takes a
<a href="http://www.sgi.com/tech/stl/Generator.html">Generator</a>
and creates a model of
<a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>.
Each increment retrieves an item from the generator and makes it
available to be retrieved by dereferencing. The motivation for this
iterator is that some concepts can be more naturally expressed as a
generator, while most STL algorithms expect an iterator. An example
is the <a href="../random/index.html">Random Number</a> library.
<h2>Synopsis</h2>
<blockquote>
<pre>
namespace boost {
template &lt;class Generator&gt;
class generator_iterator_policies;
template &lt;class Generator&gt;
class generator_iterator_generator;
template &lt;class Generator&gt;
typename generator_iterator_generator&lt;Generator&gt;::type
make_generator_iterator(Generator &amp; gen);
}
</pre>
</blockquote>
<hr>
<h2>The Generator Iterator Generator Class</h2>
The class generator_iterator_generator is a helper class whose purpose
is to construct a generator iterator type. The template parameter for
this class is the Generator function object type that is being
wrapped. The generator iterator adaptor only holds a reference (or
pointer) to the function object, therefore the function object must
outlive the generator iterator adaptor constructed from it.
<pre>
template &lt;class Generator>
class generator_iterator_generator
{
public:
typedef <a href="iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt...&gt; type; // the resulting generator iterator type
}
</pre>
<h3>Template Parameters</h3>
<table border>
<tr>
<th>Parameter</th>
<th>Description</th>
</tr>
<tr>
<td><tt><a href="http://www.sgi.com/tech/stl/Generator.html">Generator</a></tt>
<td>The generator (0-ary function object) type being
wrapped. The return type of the function must be defined as
<tt>Generator::result_type</tt>. The function object must be a model
of
<a href="http://www.sgi.com/tech/stl/Generator.html">Generator</a>.
</td>
</table>
<h3>Concept Model</h3>
The generator iterator class is a model of
<a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>.
<h3>Members</h3>
The generator iterator implements the member functions
and operators required of the
<a href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a>
concept.
<br>
<hr>
<h2><a name="make_generator_iterator">The Generator Iterator Object Generator</a></h2>
The <tt>make_generator_iterator()</tt> function provides a
convenient way to create generator iterator objects. The function
saves the user the trouble of explicitly writing out the iterator
types.
<blockquote>
<pre>
template &lt;class Generator&gt;
typename generator_iterator_generator&lt;Generator&gt;::type
make_function_output_iterator(Generator &amp; gen);
</pre>
</blockquote>
<hr>
<h3>Example</h3>
The following program shows how <code>generator_iterator</code>
transforms a generator into an input iterator.
<blockquote>
<pre>
#include &lt;iostream>
#include &lt;boost/generator_iterator.hpp>
class my_generator
{
public:
typedef int result_type;
my_generator() : state(0) { }
int operator()() { return ++state; }
private:
int state;
};
int main()
{
my_generator gen;
boost::generator_iterator_generator&lt;my_generator&gt;::type it = boost::make_generator_iterator(gen);
for(int i = 0; i &lt; 10; ++i, ++it)
std::cout &lt;&lt; *it &lt;&lt; std::endl;
}
</pre>
</blockquote>
<hr>
Written by Jens Maurer.
</body>
</html>

View File

@ -6,6 +6,7 @@
// See http://www.boost.org for most recent version including documentation.
//
// Revision History
// 11 Feb 2001 Compile with Borland, re-enable failing tests (David Abrahams)
// 29 Jan 2001 Initial revision (David Abrahams)
#include <boost/half_open_range.hpp>
@ -140,7 +141,6 @@ void category_test_2(
assert(!greater(ri,rj));
assert(!less(ri,rj));
}
#if 0
else if (one_empty)
{
const range& empty = ri.empty() ? ri : rj;
@ -184,7 +184,6 @@ void category_test_2(
assert(greater_equal(ri,rj));
}
}
#endif
}
@ -305,10 +304,10 @@ void test(T x0, T x1, T x2, T x3)
template <class Integer>
void test_integer(Integer* = 0) // default arg works around MSVC bug
{
const Integer a = 0;
const Integer b = a + unsigned_random(128 - a);
const Integer c = b + unsigned_random(128 - b);
const Integer d = c + unsigned_random(128 - c);
Integer a = 0;
Integer b = a + unsigned_random(128 - a);
Integer c = b + unsigned_random(128 - b);
Integer d = c + unsigned_random(128 - c);
test(a, b, c, d);
}
@ -347,7 +346,7 @@ int main()
test_integer<unsigned int>();
test_integer<long>();
test_integer<unsigned long>();
#if defined(ULLONG_MAX) || defined(ULONG_LONG_MAX)
#if defined(BOOST_HAS_LONG_LONG)
test_integer<long long>();
test_integer<unsigned long long>();
#endif

52
include/boost/assert.hpp Normal file
View File

@ -0,0 +1,52 @@
#ifndef BOOST_ASSERT_HPP_INCLUDED
#define BOOST_ASSERT_HPP_INCLUDED
#if _MSC_VER >= 1020
#pragma once
#endif
//
// boost/assert.hpp
//
// Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
//
// When BOOST_DEBUG is not defined, it defaults to 0 (off)
// for compatibility with programs that do not expect asserts
// in the smart pointer class templates.
//
// This default may be changed after an initial transition period.
//
#ifndef BOOST_DEBUG
#define BOOST_DEBUG 0
#endif
#if BOOST_DEBUG
#include <assert.h>
#ifndef BOOST_ASSERT
#include <boost/current_function.hpp>
bool boost_error(char const * expr, char const * func, char const * file, long line);
# define BOOST_ASSERT(expr) ((expr) || !boost_error(#expr, BOOST_CURRENT_FUNCTION, __FILE__, __LINE__) || (assert(expr), true))
#endif // #ifndef BOOST_ASSERT
#else // #if BOOST_DEBUG
#undef BOOST_ASSERT
#define BOOST_ASSERT(expr) ((void)0)
#endif // #if BOOST_DEBUG
#endif // #ifndef BOOST_ASSERT_HPP_INCLUDED

View File

@ -0,0 +1,60 @@
#ifndef BOOST_CHECKED_DELETE_HPP_INCLUDED
#define BOOST_CHECKED_DELETE_HPP_INCLUDED
#if _MSC_VER >= 1020
#pragma once
#endif
//
// boost/checked_delete.hpp
//
// Copyright (c) 1999, 2000, 2001, 2002 boost.org
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
namespace boost
{
// verify that types are complete for increased safety
template< typename T > inline void checked_delete(T * x)
{
typedef char type_must_be_complete[sizeof(T)];
delete x;
}
template< typename T > inline void checked_array_delete(T * x)
{
typedef char type_must_be_complete[sizeof(T)];
delete [] x;
}
template<class T> struct checked_deleter
{
typedef void result_type;
typedef T * argument_type;
void operator()(T * x)
{
checked_delete(x);
}
};
template<class T> struct checked_array_deleter
{
typedef void result_type;
typedef T * argument_type;
void operator()(T * x)
{
checked_array_delete(x);
}
};
} // namespace boost
#endif // #ifndef BOOST_CHECKED_DELETE_HPP_INCLUDED

View File

@ -0,0 +1,56 @@
#ifndef BOOST_CURRENT_FUNCTION_HPP_INCLUDED
#define BOOST_CURRENT_FUNCTION_HPP_INCLUDED
#if _MSC_VER >= 1020
#pragma once
#endif
//
// boost/current_function.hpp - BOOST_CURRENT_FUNCTION
//
// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
namespace boost
{
namespace detail
{
inline void current_function_helper()
{
#if defined(__GNUC__)
# define BOOST_CURRENT_FUNCTION __PRETTY_FUNCTION__
#elif defined(__FUNCSIG__)
# define BOOST_CURRENT_FUNCTION __FUNCSIG__
#elif defined(__BORLANDC__)
# define BOOST_CURRENT_FUNCTION __FUNC__
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901)
# define BOOST_CURRENT_FUNCTION __func__
#else
# define BOOST_CURRENT_FUNCTION "(unknown)"
#endif
}
} // namespace detail
} // namespace boost
#endif // #ifndef BOOST_CURRENT_FUNCTION_HPP_INCLUDED

View File

@ -23,28 +23,43 @@
#include <boost/config.hpp>
#endif
#ifndef BOOST_TYPE_TRAITS_HPP
#include <boost/type_traits.hpp>
#ifndef BOOST_ARITHMETIC_TYPE_TRAITS_HPP
#include <boost/type_traits/arithmetic_traits.hpp>
#endif
#ifndef BOOST_COMPOSITE_TYPE_TRAITS_HPP
#include <boost/type_traits/composite_traits.hpp>
#endif
namespace boost{
namespace detail{
template <typename T, bool isp, bool b1, bool b2>
template <typename T, bool small_>
struct ct_imp2
{
typedef const T& param_type;
};
template <typename T>
struct ct_imp2<T, true>
{
typedef const T param_type;
};
template <typename T, bool isp, bool b1>
struct ct_imp
{
typedef const T& param_type;
};
template <typename T, bool isp>
struct ct_imp<T, isp, true, true>
struct ct_imp<T, isp, true>
{
typedef T const param_type;
typedef typename ct_imp2<T, sizeof(T) <= sizeof(void*)>::param_type param_type;
};
template <typename T, bool b1, bool b2>
struct ct_imp<T, true, b1, b2>
template <typename T, bool b1>
struct ct_imp<T, true, b1>
{
typedef T const param_type;
};
@ -64,7 +79,11 @@ public:
// however compiler bugs prevent this - instead pass three bool's to
// ct_imp<T,bool,bool,bool> and add an extra partial specialisation
// of ct_imp to handle the logic. (JM)
typedef typename detail::ct_imp<T, ::boost::is_pointer<typename remove_const<T>::type>::value, ::boost::is_arithmetic<typename remove_const<T>::type>::value, sizeof(T) <= sizeof(void*)>::param_type param_type;
typedef typename detail::ct_imp<
T,
::boost::is_pointer<T>::value,
::boost::is_arithmetic<T>::value
>::param_type param_type;
};
template <typename T>
@ -76,7 +95,7 @@ struct call_traits<T&>
typedef T& param_type; // hh removed const
};
#if defined(__BORLANDC__) && (__BORLANDC__ <= 0x551)
#if defined(__BORLANDC__) && (__BORLANDC__ <= 0x560)
// these are illegal specialisations; cv-qualifies applied to
// references have no effect according to [8.3.2p1],
// C++ Builder requires them though as it treats cv-qualified
@ -106,7 +125,7 @@ struct call_traits<T&const volatile>
typedef T& param_type; // hh removed const
};
#endif
#ifndef __SUNPRO_CC
template <typename T, std::size_t N>
struct call_traits<T [N]>
{
@ -132,6 +151,7 @@ public:
typedef const array_type& const_reference;
typedef const T* const param_type;
};
#endif
}

View File

@ -19,8 +19,11 @@
#define BOOST_DETAIL_COMPRESSED_PAIR_HPP
#include <algorithm>
#ifndef BOOST_TYPE_TRAITS_HPP
#include <boost/type_traits.hpp>
#ifndef BOOST_OBJECT_TYPE_TRAITS_HPP
#include <boost/type_traits/object_traits.hpp>
#endif
#ifndef BOOST_SAME_TRAITS_HPP
#include <boost/type_traits/same_traits.hpp>
#endif
#ifndef BOOST_CALL_TRAITS_HPP
#include <boost/call_traits.hpp>
@ -29,6 +32,10 @@
namespace boost
{
template <class T1, class T2>
class compressed_pair;
// compressed_pair
namespace details
@ -101,10 +108,10 @@ namespace details
compressed_pair_imp(first_param_type x, second_param_type y)
: first_(x), second_(y) {}
explicit compressed_pair_imp(first_param_type x)
compressed_pair_imp(first_param_type x)
: first_(x) {}
explicit compressed_pair_imp(second_param_type y)
compressed_pair_imp(second_param_type y)
: second_(y) {}
first_reference first() {return first_;}
@ -113,10 +120,10 @@ namespace details
second_reference second() {return second_;}
second_const_reference second() const {return second_;}
void swap(compressed_pair_imp& y)
void swap(::boost::compressed_pair<T1, T2>& y)
{
cp_swap(first_, y.first_);
cp_swap(second_, y.second_);
cp_swap(first_, y.first());
cp_swap(second_, y.second());
}
private:
first_type first_;
@ -144,10 +151,10 @@ namespace details
compressed_pair_imp(first_param_type x, second_param_type y)
: first_type(x), second_(y) {}
explicit compressed_pair_imp(first_param_type x)
compressed_pair_imp(first_param_type x)
: first_type(x) {}
explicit compressed_pair_imp(second_param_type y)
compressed_pair_imp(second_param_type y)
: second_(y) {}
first_reference first() {return *this;}
@ -156,10 +163,10 @@ namespace details
second_reference second() {return second_;}
second_const_reference second() const {return second_;}
void swap(compressed_pair_imp& y)
void swap(::boost::compressed_pair<T1,T2>& y)
{
// no need to swap empty base class:
cp_swap(second_, y.second_);
cp_swap(second_, y.second());
}
private:
second_type second_;
@ -186,10 +193,10 @@ namespace details
compressed_pair_imp(first_param_type x, second_param_type y)
: second_type(y), first_(x) {}
explicit compressed_pair_imp(first_param_type x)
compressed_pair_imp(first_param_type x)
: first_(x) {}
explicit compressed_pair_imp(second_param_type y)
compressed_pair_imp(second_param_type y)
: second_type(y) {}
first_reference first() {return first_;}
@ -198,10 +205,10 @@ namespace details
second_reference second() {return *this;}
second_const_reference second() const {return *this;}
void swap(compressed_pair_imp& y)
void swap(::boost::compressed_pair<T1,T2>& y)
{
// no need to swap empty base class:
cp_swap(first_, y.first_);
cp_swap(first_, y.first());
}
private:
@ -230,10 +237,10 @@ namespace details
compressed_pair_imp(first_param_type x, second_param_type y)
: first_type(x), second_type(y) {}
explicit compressed_pair_imp(first_param_type x)
compressed_pair_imp(first_param_type x)
: first_type(x) {}
explicit compressed_pair_imp(second_param_type y)
compressed_pair_imp(second_param_type y)
: second_type(y) {}
first_reference first() {return *this;}
@ -243,7 +250,7 @@ namespace details
second_const_reference second() const {return *this;}
//
// no need to swap empty bases:
void swap(compressed_pair_imp&) {}
void swap(::boost::compressed_pair<T1,T2>&) {}
};
// JM
@ -269,7 +276,7 @@ namespace details
compressed_pair_imp(first_param_type x, second_param_type)
: first_type(x) {}
explicit compressed_pair_imp(first_param_type x)
compressed_pair_imp(first_param_type x)
: first_type(x) {}
first_reference first() {return *this;}
@ -278,7 +285,7 @@ namespace details
second_reference second() {return *this;}
second_const_reference second() const {return *this;}
void swap(compressed_pair_imp&) {}
void swap(::boost::compressed_pair<T1,T2>&) {}
private:
};
@ -302,7 +309,7 @@ namespace details
compressed_pair_imp(first_param_type x, second_param_type y)
: first_(x), second_(y) {}
explicit compressed_pair_imp(first_param_type x)
compressed_pair_imp(first_param_type x)
: first_(x), second_(x) {}
first_reference first() {return first_;}
@ -311,10 +318,10 @@ namespace details
second_reference second() {return second_;}
second_const_reference second() const {return second_;}
void swap(compressed_pair_imp<T1, T2, 5>& y)
void swap(::boost::compressed_pair<T1, T2>& y)
{
cp_swap(first_, y.first_);
cp_swap(second_, y.second_);
cp_swap(first_, y.first());
cp_swap(second_, y.second());
}
private:
first_type first_;
@ -398,7 +405,10 @@ public:
compressed_pair() : base() {}
compressed_pair(first_param_type x, second_param_type y) : base(x, y) {}
explicit compressed_pair(first_param_type x) : base(x) {}
#if !(defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x530))
explicit
#endif
compressed_pair(first_param_type x) : base(x) {}
first_reference first() {return base::first();}
first_const_reference first() const {return base::first();}
@ -406,7 +416,7 @@ public:
second_reference second() {return base::second();}
second_const_reference second() const {return base::second();}
void swap(compressed_pair& y) { base::swap(y); }
void swap(::boost::compressed_pair<T,T>& y) { base::swap(y); }
};
template <class T1, class T2>
@ -422,3 +432,4 @@ swap(compressed_pair<T1, T2>& x, compressed_pair<T1, T2>& y)
#endif // BOOST_DETAIL_COMPRESSED_PAIR_HPP

View File

@ -24,13 +24,16 @@
#include <boost/config.hpp>
#endif
#ifndef BOOST_TYPE_TRAITS_HPP
#include <boost/type_traits.hpp>
#ifndef BOOST_ARITHMETIC_TYPE_TRAITS_HPP
#include <boost/type_traits/arithmetic_traits.hpp>
#endif
#ifndef BOOST_COMPOSITE_TYPE_TRAITS_HPP
#include <boost/type_traits/composite_traits.hpp>
#endif
namespace boost{
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES) || !defined(BOOST_NO_MEMBER_TEMPLATES)
#ifdef BOOST_MSVC6_MEMBER_TEMPLATES
//
// use member templates to emulate
// partial specialisation:
@ -61,7 +64,8 @@ struct reference_call_traits
typedef T const_reference;
typedef T param_type;
};
template <bool simple, bool reference>
template <bool pointer, bool arithmetic, bool reference>
struct call_traits_chooser
{
template <class T>
@ -70,8 +74,9 @@ struct call_traits_chooser
typedef standard_call_traits<T> type;
};
};
template <>
struct call_traits_chooser<true, false>
struct call_traits_chooser<true, false, false>
{
template <class T>
struct rebind
@ -79,8 +84,9 @@ struct call_traits_chooser<true, false>
typedef simple_call_traits<T> type;
};
};
template <>
struct call_traits_chooser<false, true>
struct call_traits_chooser<false, false, true>
{
template <class T>
struct rebind
@ -88,12 +94,50 @@ struct call_traits_chooser<false, true>
typedef reference_call_traits<T> type;
};
};
template <bool size_is_small>
struct call_traits_sizeof_chooser2
{
template <class T>
struct small_rebind
{
typedef simple_call_traits<T> small_type;
};
};
template<>
struct call_traits_sizeof_chooser2<false>
{
template <class T>
struct small_rebind
{
typedef standard_call_traits<T> small_type;
};
};
template <>
struct call_traits_chooser<false, true, false>
{
template <class T>
struct rebind
{
enum { sizeof_choice = (sizeof(T) <= sizeof(void*)) };
typedef call_traits_sizeof_chooser2<(sizeof(T) <= sizeof(void*))> chooser;
typedef typename chooser::template small_rebind<T> bound_type;
typedef typename bound_type::small_type type;
};
};
} // namespace detail
template <typename T>
struct call_traits
{
private:
typedef detail::call_traits_chooser<(is_pointer<T>::value || is_arithmetic<T>::value) && sizeof(T) <= sizeof(void*), is_reference<T>::value> chooser;
typedef detail::call_traits_chooser<
::boost::is_pointer<T>::value,
::boost::is_arithmetic<T>::value,
::boost::is_reference<T>::value
> chooser;
typedef typename chooser::template rebind<T> bound_type;
typedef typename bound_type::type call_traits_type;
public:

View File

@ -10,8 +10,8 @@
/* Release notes:
20 Jan 2001:
Fixed obvious bugs (David Abrahams)
07 Oct 2000:
Added better single argument constructor support.
07 Oct 2000:
Added better single argument constructor support.
03 Oct 2000:
Added VC6 support (JM).
23rd July 2000:
@ -26,8 +26,11 @@
#define BOOST_OB_COMPRESSED_PAIR_HPP
#include <algorithm>
#ifndef BOOST_TYPE_TRAITS_HPP
#include <boost/type_traits.hpp>
#ifndef BOOST_OBJECT_TYPE_TRAITS_HPP
#include <boost/type_traits/object_traits.hpp>
#endif
#ifndef BOOST_SAME_TRAITS_HPP
#include <boost/type_traits/same_traits.hpp>
#endif
#ifndef BOOST_CALL_TRAITS_HPP
#include <boost/call_traits.hpp>
@ -35,7 +38,7 @@
namespace boost
{
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES) || !defined(BOOST_NO_MEMBER_TEMPLATES)
#ifdef BOOST_MSVC6_MEMBER_TEMPLATES
//
// use member templates to emulate
// partial specialisation. Note that due to
@ -165,7 +168,7 @@ public:
compressed_pair_1(const ::boost::compressed_pair<T1,T2>& x)
: T2(x.second()), _first(x.first()) {}
#ifdef BOOST_MSVC
#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
// Total weirdness. If the assignment to _first is moved after
// the call to the inherited operator=, then this breaks graph/test/graph.cpp
// by way of iterator_adaptor.

View File

@ -0,0 +1,73 @@
// (C) Copyright Jens Maurer 2001. Permission to copy, use,
// modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
//
// Revision History:
// 15 Nov 2001 Jens Maurer
// created.
#ifndef BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP
#define BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP
#include <boost/iterator_adaptors.hpp>
#include <boost/ref.hpp>
namespace boost {
template<class Generator>
class generator_iterator_policies
{
public:
generator_iterator_policies() { }
template<class Base>
void initialize(Base& base) {
m_value = (*base)();
}
// The Iter template argument is necessary for compatibility with a MWCW
// bug workaround
template <class IteratorAdaptor>
void increment(IteratorAdaptor& iter) {
m_value = (*iter.base())();
}
template <class IteratorAdaptor>
const typename Generator::result_type&
dereference(const IteratorAdaptor&) const
{ return m_value; }
template <class IteratorAdaptor1, class IteratorAdaptor2>
bool equal(const IteratorAdaptor1& x, const IteratorAdaptor2& y) const
{ return x.base() == y.base() &&
x.policies().m_value == y.policies().m_value; }
private:
typename Generator::result_type m_value;
};
template<class Generator>
struct generator_iterator_generator
{
typedef iterator_adaptor<Generator*, generator_iterator_policies<Generator>,
typename Generator::result_type, const typename Generator::result_type&,
const typename Generator::result_type*, std::input_iterator_tag,
long> type;
};
template <class Generator>
inline typename generator_iterator_generator<Generator>::type
make_generator_iterator(Generator & gen)
{
typedef typename generator_iterator_generator<Generator>::type result_t;
return result_t(&gen);
}
} // namespace boost
#endif // BOOST_ITERATOR_ADAPTOR_GENERATOR_ITERATOR_HPP

View File

@ -1,20 +1,31 @@
// Boost operators.hpp header file ----------------------------------------//
// (C) Copyright David Abrahams 1999. Permission to copy, use,
// modify, sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// (C) Copyright Jeremy Siek 1999. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// (C) Copyright David Abrahams, Jeremy Siek, and Daryle Walker 1999-2001.
// Permission to copy, use, modify, sell and distribute this software is
// granted provided this copyright notice appears in all copies. This
// software is provided "as is" without express or implied warranty, and
// with no claim as to its suitability for any purpose.
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 02 Dec 01 Bug fixed in random_access_iteratable. (Helmut Zeisel)
// 28 Sep 01 Factored out iterator operator groups. (Daryle Walker)
// 27 Aug 01 'left' form for non commutative operators added;
// additional classes for groups of related operators added;
// workaround for empty base class optimization
// bug of GCC 3.0 (Helmut Zeisel)
// 25 Jun 01 output_iterator_helper changes: removed default template
// parameters, added support for self-proxying, additional
// documentation and tests (Aleksey Gurtovoy)
// 29 May 01 Added operator classes for << and >>. Added input and output
// iterator helper classes. Added classes to connect equality and
// relational operators. Added classes for groups of related
// operators. Reimplemented example operator and iterator helper
// classes in terms of the new groups. (Daryle Walker, with help
// from Alexy Gurtovoy)
// 11 Feb 01 Fixed bugs in the iterator helpers which prevented explicitly
// supplied arguments from actually being used (Dave Abrahams)
// 04 Jul 00 Fixed NO_OPERATORS_IN_NAMESPACE bugs, major cleanup and
// refactoring of compiler workarounds, additional documentation
// (Alexy Gurtovoy and Mark Rodgers with some help and prompting from
@ -76,7 +87,14 @@
namespace boost {
namespace detail {
// Helmut Zeisel, empty base class optimization bug with GCC 3.0.0
#if defined(__GNUC__) && __GNUC__==3 && __GNUC_MINOR__==0 && __GNU_PATCHLEVEL__==0
class empty_base {
bool dummy;
};
#else
class empty_base {};
#endif
} // namespace detail
} // namespace boost
@ -163,6 +181,13 @@ struct subtractable2 : B
friend T operator-(T x, const U& y) { return x -= y; }
};
template <class T, class U, class B = ::boost::detail::empty_base>
struct subtractable2_left : B
{
friend T operator-(const U& x, const T& y)
{ T result(x); return result -= y; }
};
template <class T, class B = ::boost::detail::empty_base>
struct subtractable1 : B
{
@ -175,6 +200,13 @@ struct dividable2 : B
friend T operator/(T x, const U& y) { return x /= y; }
};
template <class T, class U, class B = ::boost::detail::empty_base>
struct dividable2_left : B
{
friend T operator/(const U& x, const T& y)
{ T result(x); return result /= y; }
};
template <class T, class B = ::boost::detail::empty_base>
struct dividable1 : B
{
@ -187,6 +219,13 @@ struct modable2 : B
friend T operator%(T x, const U& y) { return x %= y; }
};
template <class T, class U, class B = ::boost::detail::empty_base>
struct modable2_left : B
{
friend T operator%(const U& x, const T& y)
{ T result(x); return result %= y; }
};
template <class T, class B = ::boost::detail::empty_base>
struct modable1 : B
{
@ -280,12 +319,303 @@ struct indexable : B
}
};
// More operator classes (contributed by Daryle Walker) --------------------//
template <class T, class U, class B = ::boost::detail::empty_base>
struct left_shiftable2 : B
{
friend T operator<<(T x, const U& y) { return x <<= y; }
};
template <class T, class B = ::boost::detail::empty_base>
struct left_shiftable1 : B
{
friend T operator<<(T x, const T& y) { return x <<= y; }
};
template <class T, class U, class B = ::boost::detail::empty_base>
struct right_shiftable2 : B
{
friend T operator>>(T x, const U& y) { return x >>= y; }
};
template <class T, class B = ::boost::detail::empty_base>
struct right_shiftable1 : B
{
friend T operator>>(T x, const T& y) { return x >>= y; }
};
template <class T, class U, class B = ::boost::detail::empty_base>
struct equivalent2 : B
{
friend bool operator==(const T& x, const U& y)
{
return !(x < y) && !(x > y);
}
};
template <class T, class B = ::boost::detail::empty_base>
struct equivalent1 : B
{
friend bool operator==(const T&x, const T&y)
{
return !(x < y) && !(y < x);
}
};
template <class T, class U, class B = ::boost::detail::empty_base>
struct partially_ordered2 : B
{
friend bool operator<=(const T& x, const U& y)
{ return (x < y) || (x == y); }
friend bool operator>=(const T& x, const U& y)
{ return (x > y) || (x == y); }
friend bool operator>(const U& x, const T& y)
{ return y < x; }
friend bool operator<(const U& x, const T& y)
{ return y > x; }
friend bool operator<=(const U& x, const T& y)
{ return (y > x) || (y == x); }
friend bool operator>=(const U& x, const T& y)
{ return (y < x) || (y == x); }
};
template <class T, class B = ::boost::detail::empty_base>
struct partially_ordered1 : B
{
friend bool operator>(const T& x, const T& y)
{ return y < x; }
friend bool operator<=(const T& x, const T& y)
{ return (x < y) || (x == y); }
friend bool operator>=(const T& x, const T& y)
{ return (y < x) || (x == y); }
};
// Combined operator classes (contributed by Daryle Walker) ----------------//
template <class T, class U, class B = ::boost::detail::empty_base>
struct totally_ordered2
: less_than_comparable2<T, U
, equality_comparable2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct totally_ordered1
: less_than_comparable1<T
, equality_comparable1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct additive2
: addable2<T, U
, subtractable2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct additive1
: addable1<T
, subtractable1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct multiplicative2
: multipliable2<T, U
, dividable2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct multiplicative1
: multipliable1<T
, dividable1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct integer_multiplicative2
: multiplicative2<T, U
, modable2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct integer_multiplicative1
: multiplicative1<T
, modable1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct arithmetic2
: additive2<T, U
, multiplicative2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct arithmetic1
: additive1<T
, multiplicative1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct integer_arithmetic2
: additive2<T, U
, integer_multiplicative2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct integer_arithmetic1
: additive1<T
, integer_multiplicative1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct bitwise2
: xorable2<T, U
, andable2<T, U
, orable2<T, U, B
> > > {};
template <class T, class B = ::boost::detail::empty_base>
struct bitwise1
: xorable1<T
, andable1<T
, orable1<T, B
> > > {};
template <class T, class B = ::boost::detail::empty_base>
struct unit_steppable
: incrementable<T
, decrementable<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct shiftable2
: left_shiftable2<T, U
, right_shiftable2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct shiftable1
: left_shiftable1<T
, right_shiftable1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct ring_operators2
: additive2<T, U
, subtractable2_left<T, U
, multipliable2<T, U, B
> > > {};
template <class T, class B = ::boost::detail::empty_base>
struct ring_operators1
: additive1<T
, multipliable1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct ordered_ring_operators2
: ring_operators2<T, U
, totally_ordered2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct ordered_ring_operators1
: ring_operators1<T
, totally_ordered1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct field_operators2
: ring_operators2<T, U
, dividable2<T, U
, dividable2_left<T, U, B
> > > {};
template <class T, class B = ::boost::detail::empty_base>
struct field_operators1
: ring_operators1<T
, dividable1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct ordered_field_operators2
: field_operators2<T, U
, totally_ordered2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct ordered_field_operators1
: field_operators1<T
, totally_ordered1<T, B
> > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct euclidian_ring_operators2
: ring_operators2<T, U
, dividable2<T, U
, dividable2_left<T, U
, modable2<T, U
, modable2_left<T, U, B
> > > > > {};
template <class T, class B = ::boost::detail::empty_base>
struct euclidian_ring_operators1
: ring_operators1<T
, dividable1<T
, modable1<T, B
> > > {};
template <class T, class U, class B = ::boost::detail::empty_base>
struct ordered_euclidian_ring_operators2
: totally_ordered2<T, U
, euclidian_ring_operators2<T, U, B
> > {};
template <class T, class B = ::boost::detail::empty_base>
struct ordered_euclidian_ring_operators1
: totally_ordered1<T
, euclidian_ring_operators1<T, B
> > {};
template <class T, class P, class B = ::boost::detail::empty_base>
struct input_iteratable
: equality_comparable1<T
, incrementable<T
, dereferenceable<T, P, B
> > > {};
template <class T, class B = ::boost::detail::empty_base>
struct output_iteratable
: incrementable<T, B
> {};
template <class T, class P, class B = ::boost::detail::empty_base>
struct forward_iteratable
: input_iteratable<T, P, B
> {};
template <class T, class P, class B = ::boost::detail::empty_base>
struct bidirectional_iteratable
: forward_iteratable<T, P
, decrementable<T, B
> > {};
// To avoid repeated derivation from equality_comparable,
// which is an indirect base class of bidirectional_iterable,
// random_access_iteratable must not be derived from totally_ordered1
// but from less_than_comparable1 only. (Helmut Zeisel, 02-Dec-2001)
template <class T, class P, class D, class R, class B = ::boost::detail::empty_base>
struct random_access_iteratable
: bidirectional_iteratable<T, P
, less_than_comparable1<T
, additive2<T, D
, indexable<T, D, R, B
> > > > {};
#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
} // namespace boost
#endif // BOOST_NO_OPERATORS_IN_NAMESPACE
// BOOST_IMPORT_TEMPLATE1/BOOST_IMPORT_TEMPLATE2 -
// BOOST_IMPORT_TEMPLATE1 .. BOOST_IMPORT_TEMPLATE4 -
//
// When BOOST_NO_OPERATORS_IN_NAMESPACE is defined we need a way to import an
// operator template into the boost namespace. BOOST_IMPORT_TEMPLATE1 is used
@ -293,12 +623,37 @@ struct indexable : B
// two-argument forms. Note that these macros expect to be invoked from within
// boost.
#if defined(BOOST_NO_OPERATORS_IN_NAMESPACE)
#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
# if defined(BOOST_NO_USING_TEMPLATE)
// The template is already in boost so we have nothing to do.
# define BOOST_IMPORT_TEMPLATE4(template_name)
# define BOOST_IMPORT_TEMPLATE3(template_name)
# define BOOST_IMPORT_TEMPLATE2(template_name)
# define BOOST_IMPORT_TEMPLATE1(template_name)
#else // BOOST_NO_OPERATORS_IN_NAMESPACE
# ifndef BOOST_NO_USING_TEMPLATE
// Bring the names in with a using-declaration
// to avoid stressing the compiler.
# define BOOST_IMPORT_TEMPLATE4(template_name) using ::template_name;
# define BOOST_IMPORT_TEMPLATE3(template_name) using ::template_name;
# define BOOST_IMPORT_TEMPLATE2(template_name) using ::template_name;
# define BOOST_IMPORT_TEMPLATE1(template_name) using ::template_name;
# else
// Otherwise, because a Borland C++ 5.5 bug prevents a using declaration
// from working, we are forced to use inheritance for that compiler.
# define BOOST_IMPORT_TEMPLATE4(template_name) \
template <class T, class U, class V, class W, class B = ::boost::detail::empty_base> \
struct template_name : ::template_name<T, U, V, W, B> {};
# define BOOST_IMPORT_TEMPLATE3(template_name) \
template <class T, class U, class V, class B = ::boost::detail::empty_base> \
struct template_name : ::template_name<T, U, V, B> {};
// Because a Borland C++ 5.5 bug prevents a using declaration from working,
// we are forced to use inheritance for that compiler.
# define BOOST_IMPORT_TEMPLATE2(template_name) \
template <class T, class U, class B = ::boost::detail::empty_base> \
struct template_name : ::template_name<T, U, B> {};
@ -307,21 +662,8 @@ struct indexable : B
template <class T, class B = ::boost::detail::empty_base> \
struct template_name : ::template_name<T, B> {};
# else
// Otherwise, bring the names in with a using-declaration to avoid
// stressing the compiler
# define BOOST_IMPORT_TEMPLATE2(template_name) using ::template_name;
# define BOOST_IMPORT_TEMPLATE1(template_name) using ::template_name;
# endif // BOOST_NO_USING_TEMPLATE
#else // !BOOST_NO_OPERATORS_IN_NAMESPACE
// The template is already in boost so we have nothing to do.
# define BOOST_IMPORT_TEMPLATE2(template_name)
# define BOOST_IMPORT_TEMPLATE1(template_name)
#endif // BOOST_NO_OPERATORS_IN_NAMESPACE
//
@ -330,7 +672,7 @@ struct indexable : B
// the xxxx, xxxx1, and xxxx2 templates, importing them into boost:: as
// neccessary.
//
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
// is_chained_base<> - a traits class used to distinguish whether an operator
// template argument is being used for base class chaining, or is specifying a
@ -353,6 +695,24 @@ template<class T> struct is_chained_base {
} // namespace boost
// Import a 4-type-argument operator template into boost (if neccessary) and
// provide a specialization of 'is_chained_base<>' for it.
# define BOOST_OPERATOR_TEMPLATE4(template_name4) \
BOOST_IMPORT_TEMPLATE4(template_name4) \
template<class T, class U, class V, class W, class B> \
struct is_chained_base< ::boost::template_name4<T, U, V, W, B> > { \
typedef ::boost::detail::true_t value; \
};
// Import a 3-type-argument operator template into boost (if neccessary) and
// provide a specialization of 'is_chained_base<>' for it.
# define BOOST_OPERATOR_TEMPLATE3(template_name3) \
BOOST_IMPORT_TEMPLATE3(template_name3) \
template<class T, class U, class V, class B> \
struct is_chained_base< ::boost::template_name3<T, U, V, B> > { \
typedef ::boost::detail::true_t value; \
};
// Import a 2-type-argument operator template into boost (if neccessary) and
// provide a specialization of 'is_chained_base<>' for it.
# define BOOST_OPERATOR_TEMPLATE2(template_name2) \
@ -412,6 +772,10 @@ BOOST_OPERATOR_TEMPLATE1(template_name##1)
#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
# define BOOST_OPERATOR_TEMPLATE4(template_name4) \
BOOST_IMPORT_TEMPLATE4(template_name4)
# define BOOST_OPERATOR_TEMPLATE3(template_name3) \
BOOST_IMPORT_TEMPLATE3(template_name3)
# define BOOST_OPERATOR_TEMPLATE2(template_name2) \
BOOST_IMPORT_TEMPLATE2(template_name2)
# define BOOST_OPERATOR_TEMPLATE1(template_name1) \
@ -432,55 +796,65 @@ BOOST_OPERATOR_TEMPLATE(equality_comparable)
BOOST_OPERATOR_TEMPLATE(multipliable)
BOOST_OPERATOR_TEMPLATE(addable)
BOOST_OPERATOR_TEMPLATE(subtractable)
BOOST_OPERATOR_TEMPLATE2(subtractable2_left)
BOOST_OPERATOR_TEMPLATE(dividable)
BOOST_OPERATOR_TEMPLATE2(dividable2_left)
BOOST_OPERATOR_TEMPLATE(modable)
BOOST_OPERATOR_TEMPLATE2(modable2_left)
BOOST_OPERATOR_TEMPLATE(xorable)
BOOST_OPERATOR_TEMPLATE(andable)
BOOST_OPERATOR_TEMPLATE(orable)
BOOST_OPERATOR_TEMPLATE1(incrementable)
BOOST_OPERATOR_TEMPLATE1(decrementable)
BOOST_OPERATOR_TEMPLATE2(dereferenceable)
BOOST_OPERATOR_TEMPLATE3(indexable)
// indexable doesn't follow the patterns above (it has 4 template arguments), so
// we just write out the compiler hacks explicitly.
#ifdef BOOST_NO_OPERATORS_IN_NAMESPACE
# ifdef BOOST_NO_USING_TEMPLATE
template <class T, class I, class R, class B = ::boost::detail::empty_base>
struct indexable : ::indexable<T,I,R,B> {};
# else
using ::indexable;
# endif
#endif
BOOST_OPERATOR_TEMPLATE(left_shiftable)
BOOST_OPERATOR_TEMPLATE(right_shiftable)
BOOST_OPERATOR_TEMPLATE(equivalent)
BOOST_OPERATOR_TEMPLATE(partially_ordered)
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class T, class I, class R, class B>
struct is_chained_base< ::boost::indexable<T, I, R, B> > {
typedef ::boost::detail::true_t operator_template_type;
};
#endif
BOOST_OPERATOR_TEMPLATE(totally_ordered)
BOOST_OPERATOR_TEMPLATE(additive)
BOOST_OPERATOR_TEMPLATE(multiplicative)
BOOST_OPERATOR_TEMPLATE(integer_multiplicative)
BOOST_OPERATOR_TEMPLATE(arithmetic)
BOOST_OPERATOR_TEMPLATE(integer_arithmetic)
BOOST_OPERATOR_TEMPLATE(bitwise)
BOOST_OPERATOR_TEMPLATE1(unit_steppable)
BOOST_OPERATOR_TEMPLATE(shiftable)
BOOST_OPERATOR_TEMPLATE(ring_operators)
BOOST_OPERATOR_TEMPLATE(ordered_ring_operators)
BOOST_OPERATOR_TEMPLATE(field_operators)
BOOST_OPERATOR_TEMPLATE(ordered_field_operators)
BOOST_OPERATOR_TEMPLATE(euclidian_ring_operators)
BOOST_OPERATOR_TEMPLATE(ordered_euclidian_ring_operators)
BOOST_OPERATOR_TEMPLATE2(input_iteratable)
BOOST_OPERATOR_TEMPLATE1(output_iteratable)
BOOST_OPERATOR_TEMPLATE2(forward_iteratable)
BOOST_OPERATOR_TEMPLATE2(bidirectional_iteratable)
BOOST_OPERATOR_TEMPLATE4(random_access_iteratable)
#undef BOOST_OPERATOR_TEMPLATE
#undef BOOST_OPERATOR_TEMPLATE4
#undef BOOST_OPERATOR_TEMPLATE3
#undef BOOST_OPERATOR_TEMPLATE2
#undef BOOST_OPERATOR_TEMPLATE1
#undef BOOST_IMPORT_TEMPLATE1
#undef BOOST_IMPORT_TEMPLATE2
#undef BOOST_IMPORT_TEMPLATE3
#undef BOOST_IMPORT_TEMPLATE4
// The following 'operators' classes can only be used portably if the derived class
// declares ALL of the required member operators.
template <class T, class U>
struct operators2
: less_than_comparable2<T,U
, equality_comparable2<T,U
, addable2<T,U
, subtractable2<T,U
, multipliable2<T,U
, dividable2<T,U
, modable2<T,U
, orable2<T,U
, andable2<T,U
, xorable2<T,U
> > > > > > > > > > {};
: totally_ordered2<T,U
, integer_arithmetic2<T,U
, bitwise2<T,U
> > > {};
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class T, class U = T>
@ -490,32 +864,44 @@ template <class T> struct operators<T, T>
#else
template <class T> struct operators
#endif
: less_than_comparable<T
, equality_comparable<T
, addable<T
, subtractable<T
, multipliable<T
, dividable<T
, modable<T
, orable<T
, andable<T
, xorable<T
, incrementable<T
, decrementable<T
> > > > > > > > > > > > {};
: totally_ordered<T
, integer_arithmetic<T
, bitwise<T
, unit_steppable<T
> > > > {};
// Iterator helper classes (contributed by Jeremy Siek) -------------------//
// (Input and output iterator helpers contributed by Daryle Walker) -------//
// (Changed to use combined operator classes by Daryle Walker) ------------//
template <class T,
class V,
class D = std::ptrdiff_t,
class P = V const *,
class R = V const &>
struct input_iterator_helper
: input_iteratable<T, P
, boost::iterator<std::input_iterator_tag, V, D, P, R
> > {};
template<class T>
struct output_iterator_helper
: output_iteratable<T
, boost::iterator<std::output_iterator_tag, void, void, void, void
> >
{
T& operator*() { return static_cast<T&>(*this); }
T& operator++() { return static_cast<T&>(*this); }
};
template <class T,
class V,
class D = std::ptrdiff_t,
class P = V*,
class R = V&>
struct forward_iterator_helper
: equality_comparable<T
, incrementable<T
, dereferenceable<T,P
, boost::iterator<std::forward_iterator_tag, V, D
> > > > {};
: forward_iteratable<T, P
, boost::iterator<std::forward_iterator_tag, V, D, P, R
> > {};
template <class T,
class V,
@ -523,12 +909,9 @@ template <class T,
class P = V*,
class R = V&>
struct bidirectional_iterator_helper
: equality_comparable<T
, incrementable<T
, decrementable<T
, dereferenceable<T,P
, boost::iterator<std::bidirectional_iterator_tag, V, D
> > > > > {};
: bidirectional_iteratable<T, P
, boost::iterator<std::bidirectional_iterator_tag, V, D, P, R
> > {};
template <class T,
class V,
@ -536,22 +919,13 @@ template <class T,
class P = V*,
class R = V&>
struct random_access_iterator_helper
: equality_comparable<T
, less_than_comparable<T
, incrementable<T
, decrementable<T
, dereferenceable<T,P
, addable2<T,D
, subtractable2<T,D
, indexable<T,D,R
, boost::iterator<std::random_access_iterator_tag, V, D
> > > > > > > > >
: random_access_iteratable<T, P, D, R
, boost::iterator<std::random_access_iterator_tag, V, D, P, R
> >
{
#ifndef __BORLANDC__
friend D requires_difference_operator(const T& x, const T& y) {
return x - y;
}
#endif
}; // random_access_iterator_helper
} // namespace boost

162
include/boost/ref.hpp Normal file
View File

@ -0,0 +1,162 @@
#ifndef BOOST_REF_HPP_INCLUDED
# define BOOST_REF_HPP_INCLUDED
# if _MSC_VER+0 >= 1020
# pragma once
# endif
# include <boost/config.hpp>
# include <boost/utility/addressof.hpp>
//
// ref.hpp - ref/cref, useful helper functions
//
// Copyright (C) 1999, 2000 Jaakko J<>rvi (jaakko.jarvi@cs.utu.fi)
// Copyright (C) 2001, 2002 Peter Dimov
// Copyright (C) 2002 David Abrahams
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
// See http://www.boost.org/libs/bind/ref.html for documentation.
//
namespace boost
{
template<class T> class reference_wrapper
{
public:
typedef T type;
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
explicit reference_wrapper(T& t): t_(&t) {}
#else
explicit reference_wrapper(T& t): t_(addressof(t)) {}
#endif
operator T& () const { return *t_; }
T& get() const { return *t_; }
T* get_pointer() const { return t_; }
private:
T* t_;
};
# if defined(__BORLANDC__) && (__BORLANDC__ <= 0x560)
# define BOOST_REF_CONST
# else
# define BOOST_REF_CONST const
# endif
template<class T> inline reference_wrapper<T> BOOST_REF_CONST ref(T & t)
{
return reference_wrapper<T>(t);
}
template<class T> inline reference_wrapper<T const> BOOST_REF_CONST cref(T const & t)
{
return reference_wrapper<T const>(t);
}
# undef BOOST_REF_CONST
# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template<typename T>
class is_reference_wrapper
{
public:
BOOST_STATIC_CONSTANT(bool, value = false);
};
template<typename T>
class is_reference_wrapper<reference_wrapper<T> >
{
public:
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
class unwrap_reference
{
public:
typedef T type;
};
template<typename T>
class unwrap_reference<reference_wrapper<T> >
{
public:
typedef T type;
};
# else // no partial specialization
} // namespace boost
#include <boost/type.hpp>
namespace boost
{
namespace detail
{
typedef char (&yes_reference_wrapper_t)[1];
typedef char (&no_reference_wrapper_t)[2];
no_reference_wrapper_t is_reference_wrapper_test(...);
template<typename T>
yes_reference_wrapper_t is_reference_wrapper_test(type< reference_wrapper<T> >);
template<bool wrapped>
struct reference_unwrapper
{
template <class T>
struct apply
{
typedef T type;
};
};
template<>
struct reference_unwrapper<true>
{
template <class T>
struct apply
{
typedef typename T::type type;
};
};
}
template<typename T>
class is_reference_wrapper
{
public:
BOOST_STATIC_CONSTANT(
bool, value = (
sizeof(detail::is_reference_wrapper_test(type<T>()))
== sizeof(detail::yes_reference_wrapper_t)));
};
template <typename T>
class unwrap_reference
: public detail::reference_unwrapper<
is_reference_wrapper<T>::value
>::template apply<T>
{};
# endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
} // namespace boost
#endif // #ifndef BOOST_REF_HPP_INCLUDED

View File

@ -10,25 +10,17 @@
// Classes appear in alphabetical order
// Revision History
// 26 Jan 00 protected noncopyable destructor added (Miki Jovanovic)
// 10 Dec 99 next() and prior() templates added (Dave Abrahams)
// 30 Aug 99 moved cast templates to cast.hpp (Beman Dawes)
// 3 Aug 99 cast templates added
// 20 Jul 99 name changed to utility.hpp
// 9 Jun 99 protected noncopyable default ctor
// 2 Jun 99 Initial Version. Class noncopyable only contents (Dave Abrahams)
#ifndef BOOST_UTILITY_HPP
#define BOOST_UTILITY_HPP
#include <boost/config.hpp>
#include <cstddef> // for size_t
#include <utility> // for std::pair
// certain headers are part of the <utility.hpp> interface
#include <boost/checked_delete.hpp>
#include <boost/utility/base_from_member.hpp>
#include <boost/utility/addressof.hpp>
namespace boost
{
// next() and prior() template functions -----------------------------------//
// Helper functions for classes like bidirectional iterators not supporting
@ -41,10 +33,10 @@ namespace boost
// Contributed by Dave Abrahams
template <class T>
T next(T x) { return ++x; }
inline T next(T x) { return ++x; }
template <class T>
T prior(T x) { return --x; }
inline T prior(T x) { return --x; }
// class noncopyable -------------------------------------------------------//
@ -64,31 +56,6 @@ namespace boost
const noncopyable& operator=( const noncopyable& );
}; // noncopyable
// class tied -------------------------------------------------------//
// A helper for conveniently assigning the two values from a pair
// into separate variables. The idea for this comes from Jaakko J<>rvi's
// Binder/Lambda Library.
// Constributed by Jeremy Siek
template <class A, class B>
class tied {
public:
inline tied(A& a, B& b) : _a(a), _b(b) { }
template <class U, class V>
inline tied& operator=(const std::pair<U,V>& p) {
_a = p.first;
_b = p.second;
return *this;
}
protected:
A& _a;
B& _b;
};
template <class A, class B>
inline tied<A,B> tie(A& a, B& b) { return tied<A,B>(a, b); }
} // namespace boost

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// Copyright (C) 2002 Brad King (brad.king@kitware.com)
// Doug Gregor (gregod@cs.rpi.edu)
// Peter Dimov
//
// Permission to copy, use, sell and distribute this software is granted
// provided this copyright notice appears in all copies.
// Permission to modify the code and to distribute modified code is granted
// provided this copyright notice appears in all copies, and a notice
// that the code was modified is included with the copyright notice.
//
// This software is provided "as is" without express or implied warranty,
// and with no claim as to its suitability for any purpose.
// For more information, see http://www.boost.org
#ifndef BOOST_UTILITY_ADDRESSOF_HPP
#define BOOST_UTILITY_ADDRESSOF_HPP
namespace boost {
// Do not make addressof() inline. Breaks MSVC 7. (Peter Dimov)
template <typename T> T* addressof(T& v)
{
return reinterpret_cast<T*>(
&const_cast<char&>(reinterpret_cast<const volatile char &>(v)));
}
}
#endif // BOOST_UTILITY_ADDRESSOF_HPP

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// boost utility/base_from_member.hpp header file --------------------------//
// (C) Copyright Daryle Walker 2001. Permission to copy, use, modify, sell
// and distribute this software is granted provided this copyright
// notice appears in all copies. This software is provided "as is" without
// express or implied warranty, and with no claim as to its suitability for
// any purpose.
// See http://www.boost.org for most recent version including documentation.
#ifndef BOOST_UTILITY_BASE_FROM_MEMBER_HPP
#define BOOST_UTILITY_BASE_FROM_MEMBER_HPP
#include <boost/utility_fwd.hpp> // required for parameter defaults
namespace boost
{
// Base-from-member class template -----------------------------------------//
// Helper to initialize a base object so a derived class can use this
// object in the initialization of another base class. Used by
// Dietmar Kuehl from ideas by Ron Klatcho to solve the problem of a
// base class needing to be initialized by a member.
// Contributed by Daryle Walker
template < typename MemberType, int UniqueID >
class base_from_member
{
protected:
MemberType member;
explicit base_from_member()
: member()
{}
template< typename T1 >
explicit base_from_member( T1 x1 )
: member( x1 )
{}
template< typename T1, typename T2 >
base_from_member( T1 x1, T2 x2 )
: member( x1, x2 )
{}
template< typename T1, typename T2, typename T3 >
base_from_member( T1 x1, T2 x2, T3 x3 )
: member( x1, x2, x3 )
{}
}; // boost::base_from_member
} // namespace boost
#endif // BOOST_UTILITY_BASE_FROM_MEMBER_HPP

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// Boost utility_fwd.hpp header file ---------------------------------------//
// (C) Copyright boost.org 2001. Permission to copy, use, modify, sell
// and distribute this software is granted provided this copyright
// notice appears in all copies. This software is provided "as is" without
// express or implied warranty, and with no claim as to its suitability for
// any purpose.
// See http://www.boost.org for most recent version including documentation.
#ifndef BOOST_UTILITY_FWD_HPP
#define BOOST_UTILITY_FWD_HPP
namespace boost
{
// From <boost/utility/base_from_member.hpp> -------------------------------//
template < typename MemberType, int UniqueID = 0 >
class base_from_member;
// From <boost/utility.hpp> ------------------------------------------------//
class noncopyable;
// Also has a few function templates
} // namespace boost
#endif // BOOST_UTILITY_FWD_HPP

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<body bgcolor="#FFFFFF">
<h1><IMG SRC="../../c++boost.gif" WIDTH="276" HEIGHT="86" align="center">Boost
Utility Library</h1>
<p>The Boost Utility Library isn't really a single library at all.&nbsp; It is
just a collection for components too small to be called libraries in their own
right.</p>
<p>But that doesn't mean there isn't useful stuff here.&nbsp; Take a look:</p>
<blockquote>
<p><a href="base_from_member.html">base_from_member</a><br>
<a href="call_traits.htm">call_traits.htm</a><br>
<a href="compressed_pair.htm">compressed_pair.htm</a><br>
<a href="operators.htm">operators.htm</a><br>
<a href="tie.html">tie</a><br>
<a href="utility.htm">utility.htm</a></p>
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<hr>
<p>Revised
<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->07 May, 2002<!--webbot bot="Timestamp" endspan i-checksum="13976" --></p>
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<img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align=
"center" width="277" height="86">
<h1>Indirect Iterator Adaptor</h1>
Defined in header <a href=
"../../boost/iterator_adaptors.hpp">boost/iterator_adaptors.hpp</a>
<p>The indirect iterator adaptor augments an iterator by applying an
<b>extra</b> dereference inside of <tt>operator*()</tt>. For example, this
iterator makes it possible to view a container of pointers or
smart-pointers (e.g. <tt>std::list&lt;boost::shared_ptr&lt;foo&gt;
&gt;</tt>) as if it were a container of the pointed-to type. The following
<b>pseudo-code</b> shows the basic idea of the indirect iterator:
<blockquote>
<pre>
// inside a hypothetical indirect_iterator class...
typedef std::iterator_traits&lt;BaseIterator&gt;::value_type Pointer;
typedef std::iterator_traits&lt;Pointer&gt;::reference reference;
reference indirect_iterator::operator*() const {
return **this-&gt;base_iterator;
}
</pre>
</blockquote>
<h2>Synopsis</h2>
<blockquote>
<pre>
namespace boost {
template &lt;class BaseIterator,
class Value, class Reference, class Category, class Pointer&gt;
struct indirect_iterator_generator;
template &lt;class BaseIterator,
class Value, class Reference, class ConstReference,
class Category, class Pointer, class ConstPointer&gt;
struct indirect_iterator_pair_generator;
template &lt;class BaseIterator&gt;
typename indirect_iterator_generator&lt;BaseIterator&gt;::type
make_indirect_iterator(BaseIterator base)
}
</pre>
</blockquote>
<hr>
<h2><a name="indirect_iterator_generator">The Indirect Iterator Type
Generator</a></h2>
The <tt>indirect_iterator_generator</tt> template is a <a href=
"../../more/generic_programming.html#type_generator">generator</a> of
indirect iterator types. The main template parameter for this class is the
<tt>BaseIterator</tt> type that is being wrapped. In most cases the type of
the elements being pointed to can be deduced using
<tt>std::iterator_traits</tt>, but in some situations the user may want to
override this type, so there are also template parameters that allow a user
to control the <tt>value_type</tt>, <tt>pointer</tt>, and
<tt>reference</tt> types of the resulting iterators.
<blockquote>
<pre>
template &lt;class BaseIterator,
class Value, class Reference, class Pointer&gt;
class indirect_iterator_generator
{
public:
typedef <tt><a href=
"./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt;...&gt;</tt> type; // the resulting indirect iterator type
};
</pre>
</blockquote>
<h3>Example</h3>
This example uses the <tt>indirect_iterator_generator</tt> to create
indirect iterators which dereference the pointers stored in the
<tt>pointers_to_chars</tt> array to access the <tt>char</tt>s in the
<tt>characters</tt> array.
<blockquote>
<pre>
#include &lt;boost/config.hpp&gt;
#include &lt;vector&gt;
#include &lt;iostream&gt;
#include &lt;iterator&gt;
#include &lt;boost/iterator_adaptors.hpp&gt;
int main(int, char*[])
{
char characters[] = "abcdefg";
const int N = sizeof(characters)/sizeof(char) - 1; // -1 since characters has a null char
char* pointers_to_chars[N]; // at the end.
for (int i = 0; i &lt; N; ++i)
pointers_to_chars[i] = &amp;characters[i];
boost::indirect_iterator_generator&lt;char**, char&gt;::type
indirect_first(pointers_to_chars), indirect_last(pointers_to_chars + N);
std::copy(indirect_first, indirect_last, std::ostream_iterator&lt;char&gt;(std::cout, ","));
std::cout &lt;&lt; std::endl;
// to be continued...
</pre>
</blockquote>
<h3>Template Parameters</h3>
<table border>
<tr>
<th>Parameter
<th>Description
<tr>
<td><tt>BaseIterator</tt>
<td>The iterator type being wrapped. The <tt>value_type</tt>
of the base iterator should itself be dereferenceable.
The return type of the <tt>operator*</tt> for the
<tt>value_type</tt> should match the <tt>Reference</tt> type.
<tr>
<td><tt>Value</tt>
<td>The <tt>value_type</tt> of the resulting iterator, unless const. If
Value is <tt>const X</tt>, a conforming compiler makes the
<tt>value_type</tt> <tt><i>non-</i>const X</tt><a href=
"iterator_adaptors.htm#1">[1]</a>. Note that if the default
is used for <tt>Value</tt>, then there must be a valid specialization
of <tt>iterator_traits</tt> for the value type of the base iterator.
<br>
<b>Default:</b> <tt>std::iterator_traits&lt;<br>
<20> std::iterator_traits&lt;BaseIterator&gt;::value_type
&gt;::value_type</tt><a href="#2">[2]</a>
<tr>
<td><tt>Reference</tt>
<td>The <tt>reference</tt> type of the resulting iterator, and in
particular, the result type of <tt>operator*()</tt>.<br>
<b>Default:</b> <tt>Value&amp;</tt>
<tr>
<td><tt>Pointer</tt>
<td>The <tt>pointer</tt> type of the resulting iterator, and in
particular, the result type of <tt>operator-&gt;()</tt>.<br>
<b>Default:</b> <tt>Value*</tt>
<tr>
<td><tt>Category</tt>
<td>The <tt>iterator_category</tt> type for the resulting iterator.<br>
<b>Default:</b>
<tt>std::iterator_traits&lt;BaseIterator&gt;::iterator_category</tt>
</table>
<h3>Concept Model</h3>
The indirect iterator will model whichever <a href=
"http://www.sgi.com/tech/stl/Iterators.html">standard iterator
concept category</a> is modeled by the base iterator. Thus, if the
base iterator is a model of <a href=
"http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a> then so is the resulting indirect iterator. If
the base iterator models a more restrictive concept, the resulting
indirect iterator will model the same concept <a href="#3">[3]</a>.
<h3>Members</h3>
The indirect iterator type implements the member functions and operators
required of the <a href=
"http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access
Iterator</a> concept. In addition it has the following constructor:
<pre>
explicit indirect_iterator_generator::type(const BaseIterator&amp; it)
</pre>
<br>
<br>
<hr>
<p>
<h2><a name="indirect_iterator_pair_generator">The Indirect Iterator Pair
Generator</a></h2>
Sometimes a pair of <tt>const</tt>/non-<tt>const</tt> pair of iterators is
needed, such as when implementing a container. The
<tt>indirect_iterator_pair_generator</tt> class makes it more convenient to
create this pair of iterator types.
<blockquote>
<pre>
template &lt;class BaseIterator,
class Value, class Reference, class ConstReference,
class Category, class Pointer, class ConstPointer&gt;
struct indirect_iterator_pair_generator;
{
public:
typedef <tt><a href=
"./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt;...&gt;</tt> iterator; // the mutable indirect iterator type
typedef <tt><a href=
"./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt;...&gt;</tt> const_iterator; // the immutable indirect iterator type
};
</pre>
</blockquote>
<h3>Example</h3>
<blockquote>
<pre>
// continuing from the last example...
typedef boost::indirect_iterator_pair_generator&lt;char**,
char, char*, char&amp;, const char*, const char&amp;&gt; PairGen;
char mutable_characters[N];
char* pointers_to_mutable_chars[N];
for (int i = 0; i &lt; N; ++i)
pointers_to_mutable_chars[i] = &amp;mutable_characters[i];
PairGen::iterator mutable_indirect_first(pointers_to_mutable_chars),
mutable_indirect_last(pointers_to_mutable_chars + N);
PairGen::const_iterator const_indirect_first(pointers_to_chars),
const_indirect_last(pointers_to_chars + N);
std::transform(const_indirect_first, const_indirect_last,
mutable_indirect_first, std::bind1st(std::plus&lt;char&gt;(), 1));
std::copy(mutable_indirect_first, mutable_indirect_last,
std::ostream_iterator&lt;char&gt;(std::cout, ","));
std::cout &lt;&lt; std::endl;
// to be continued...
</pre>
</blockquote>
<p>The output is:
<blockquote>
<pre>
b,c,d,e,f,g,h,
</pre>
</blockquote>
<h3>Template Parameters</h3>
<table border>
<tr>
<th>Parameter
<th>Description
<tr>
<td><tt>BaseIterator</tt>
<td>The iterator type being wrapped. The <tt>value_type</tt> of the
base iterator should itself be dereferenceable.
The return type of the <tt>operator*</tt> for the
<tt>value_type</tt> should match the <tt>Reference</tt> type.
<tr>
<td><tt>Value</tt>
<td>The <tt>value_type</tt> of the resulting iterators.
If Value is <tt>const X</tt>, a conforming compiler makes the
<tt>value_type</tt> <tt><i>non-</i>const X</tt><a href=
"iterator_adaptors.htm#1">[1]</a>. Note that if the default
is used for <tt>Value</tt>, then there must be a valid
specialization of <tt>iterator_traits</tt> for the value type
of the base iterator.<br>
<b>Default:</b> <tt>std::iterator_traits&lt;<br>
<20> std::iterator_traits&lt;BaseIterator&gt;::value_type
&gt;::value_type</tt><a href="#2">[2]</a>
<tr>
<td><tt>Reference</tt>
<td>The <tt>reference</tt> type of the resulting <tt>iterator</tt>, and
in particular, the result type of its <tt>operator*()</tt>.<br>
<b>Default:</b> <tt>Value&amp;</tt>
<tr>
<td><tt>ConstReference</tt>
<td>The <tt>reference</tt> type of the resulting
<tt>const_iterator</tt>, and in particular, the result type of its
<tt>operator*()</tt>.<br>
<b>Default:</b> <tt>const Value&amp;</tt>
<tr>
<td><tt>Category</tt>
<td>The <tt>iterator_category</tt> type for the resulting iterator.<br>
<b>Default:</b>
<tt>std::iterator_traits&lt;BaseIterator&gt;::iterator_category</tt>
<tr>
<td><tt>Pointer</tt>
<td>The <tt>pointer</tt> type of the resulting <tt>iterator</tt>, and
in particular, the result type of its <tt>operator-&gt;()</tt>.<br>
<b>Default:</b> <tt>Value*</tt>
<tr>
<td><tt>ConstPointer</tt>
<td>The <tt>pointer</tt> type of the resulting <tt>const_iterator</tt>,
and in particular, the result type of its <tt>operator-&gt;()</tt>.<br>
<b>Default:</b> <tt>const Value*</tt>
</table>
<h3>Concept Model</h3>
The indirect iterators will model whichever <a href=
"http://www.sgi.com/tech/stl/Iterators.html">standard iterator
concept category</a> is modeled by the base iterator. Thus, if the
base iterator is a model of <a href=
"http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a> then so are the resulting indirect
iterators. If the base iterator models a more restrictive concept,
the resulting indirect iterators will model the same concept <a
href="#3">[3]</a>.
<h3>Members</h3>
The resulting <tt>iterator</tt> and <tt>const_iterator</tt> types implement
the member functions and operators required of the <a href=
"http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access
Iterator</a> concept. In addition they support the following constructors:
<blockquote>
<pre>
explicit indirect_iterator_pair_generator::iterator(const BaseIterator&amp; it)
explicit indirect_iterator_pair_generator::const_iterator(const BaseIterator&amp; it)
</pre>
</blockquote>
<br>
<br>
<hr>
<p>
<h2><a name="make_indirect_iterator">The Indirect Iterator Object
Generator</a></h2>
The <tt>make_indirect_iterator()</tt> function provides a more convenient
way to create indirect iterator objects. The function saves the user the
trouble of explicitly writing out the iterator types.
<blockquote>
<pre>
template &lt;class BaseIterator&gt;
typename indirect_iterator_generator&lt;BaseIterator&gt;::type
make_indirect_iterator(BaseIterator base)
</pre>
</blockquote>
<h3>Example</h3>
Here we again print the <tt>char</tt>s from the array <tt>characters</tt>
by accessing them through the array of pointers <tt>pointer_to_chars</tt>,
but this time we use the <tt>make_indirect_iterator()</tt> function which
saves us some typing.
<blockquote>
<pre>
// continuing from the last example...
std::copy(boost::make_indirect_iterator(pointers_to_chars),
boost::make_indirect_iterator(pointers_to_chars + N),
std::ostream_iterator&lt;char&gt;(std::cout, ","));
std::cout &lt;&lt; std::endl;
return 0;
}
</pre>
</blockquote>
The output is:
<blockquote>
<pre>
a,b,c,d,e,f,g,
</pre>
</blockquote>
<hr>
<h3>Notes</h3>
<p>
<p><a name="2">[2]</a> If your compiler does not support partial
specialization and the base iterator or its <tt>value_type</tt> is a
builtin pointer type, you will not be able to use the default for
<tt>Value</tt> and will need to specify this type explicitly.
<p><a name="3">[3]</a>There is a caveat to which concept the
indirect iterator can model. If the return type of the
<tt>operator*</tt> for the base iterator's value type is not a
true reference, then strickly speaking, the indirect iterator can
not be a model of <a href=
"http://www.sgi.com/tech/stl/ForwardIterator.html">Forward
Iterator</a> or any of the concepts that refine it. In this case
the <tt>Category</tt> for the indirect iterator should be
specified as <tt>std::input_iterator_tag</tt>. However, even in
this case, if the base iterator is a random access iterator, the
resulting indirect iterator will still satisfy most of the
requirements for <a href=
"http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a>.
<hr>
<p>Revised
<!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan -->18 Sep 2001<!--webbot bot="Timestamp" endspan i-checksum="14941" -->
<p>&copy; Copyright Jeremy Siek and David Abrahams 2001. Permission to
copy, use, modify, sell and distribute this document is granted provided
this copyright notice appears in all copies. This document is provided "as
is" without express or implied warranty, and with no claim as to its
suitability for any purpose.
<!-- LocalWords: html charset alt gif hpp BaseIterator const namespace struct
-->
<!-- LocalWords: ConstPointer ConstReference typename iostream int abcdefg
-->
<!-- LocalWords: sizeof PairGen pre Jeremy Siek David Abrahams
-->
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// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
#include <boost/config.hpp>
#include <vector>
#include <iostream>
#include <iterator>
#include <functional>
#include <boost/iterator_adaptors.hpp>
int main(int, char*[])
{
char characters[] = "abcdefg";
const int N = sizeof(characters)/sizeof(char) - 1; // -1 since characters has a null char
char* pointers_to_chars[N]; // at the end.
for (int i = 0; i < N; ++i)
pointers_to_chars[i] = &characters[i];
// Example of using indirect_iterator_generator
boost::indirect_iterator_generator<char**, char>::type
indirect_first(pointers_to_chars), indirect_last(pointers_to_chars + N);
std::copy(indirect_first, indirect_last, std::ostream_iterator<char>(std::cout, ","));
std::cout << std::endl;
// Example of using indirect_iterator_pair_generator
typedef boost::indirect_iterator_pair_generator<char**, char> PairGen;
char mutable_characters[N];
char* pointers_to_mutable_chars[N];
for (int j = 0; j < N; ++j)
pointers_to_mutable_chars[j] = &mutable_characters[j];
PairGen::iterator mutable_indirect_first(pointers_to_mutable_chars),
mutable_indirect_last(pointers_to_mutable_chars + N);
PairGen::const_iterator const_indirect_first(pointers_to_chars),
const_indirect_last(pointers_to_chars + N);
std::transform(const_indirect_first, const_indirect_last,
mutable_indirect_first, std::bind1st(std::plus<char>(), 1));
std::copy(mutable_indirect_first, mutable_indirect_last,
std::ostream_iterator<char>(std::cout, ","));
std::cout << std::endl;
// Example of using make_indirect_iterator()
#if !defined(BOOST_MSVC) || BOOST_MSVC > 1300
std::copy(boost::make_indirect_iterator(pointers_to_chars),
boost::make_indirect_iterator(pointers_to_chars + N),
std::ostream_iterator<char>(std::cout, ","));
std::cout << std::endl;
#endif
return 0;
}

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// (C) Copyright Jeremy Siek 1999. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// Revision History
// 08 Mar 2001 Jeremy Siek
// Moved test of indirect iterator into its own file. It to
// to be in iterator_adaptor_test.cpp.
#include <boost/config.hpp>
#include <iostream>
#include <algorithm>
#include <boost/iterator_adaptors.hpp>
#include <boost/pending/iterator_tests.hpp>
#include <boost/concept_archetype.hpp>
#include <stdlib.h>
#include <deque>
#include <set>
struct my_iterator_tag : public std::random_access_iterator_tag { };
using boost::dummyT;
typedef std::deque<int> storage;
typedef std::deque<int*> pointer_deque;
typedef std::set<storage::iterator> iterator_set;
void more_indirect_iterator_tests()
{
// For some reason all heck breaks loose in the compiler under these conditions.
#if !defined(BOOST_MSVC) || BOOST_MSVC > 1200 || !defined(__STL_DEBUG)
storage store(1000);
std::generate(store.begin(), store.end(), rand);
pointer_deque ptr_deque;
iterator_set iter_set;
for (storage::iterator p = store.begin(); p != store.end(); ++p)
{
ptr_deque.push_back(&*p);
iter_set.insert(p);
}
typedef boost::indirect_iterator_pair_generator<
pointer_deque::iterator
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
, int
#endif
> IndirectDeque;
IndirectDeque::iterator db(ptr_deque.begin());
IndirectDeque::iterator de(ptr_deque.end());
assert(static_cast<std::size_t>(de - db) == store.size());
assert(db + store.size() == de);
IndirectDeque::const_iterator dci(db);
assert(db == dci);
assert(dci == db);
assert(dci != de);
assert(dci < de);
assert(dci <= de);
assert(de >= dci);
assert(de > dci);
dci = de;
assert(dci == de);
boost::random_access_iterator_test(db + 1, store.size() - 1, boost::next(store.begin()));
*db = 999;
assert(store.front() == 999);
// Borland C++ is getting very confused about the typedef's here
typedef boost::indirect_iterator_generator<
iterator_set::iterator
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
, int
#endif
>::type indirect_set_iterator;
typedef boost::indirect_iterator_generator<
iterator_set::iterator,
const int
>::type const_indirect_set_iterator;
indirect_set_iterator sb(iter_set.begin());
indirect_set_iterator se(iter_set.end());
const_indirect_set_iterator sci(iter_set.begin());
assert(sci == sb);
assert(sci != se);
sci = se;
assert(sci == se);
*boost::prior(se) = 888;
assert(store.back() == 888);
assert(std::equal(sb, se, store.begin()));
boost::bidirectional_iterator_test(boost::next(sb), store[1], store[2]);
assert(std::equal(db, de, store.begin()));
#endif
}
int
main()
{
dummyT array[] = { dummyT(0), dummyT(1), dummyT(2),
dummyT(3), dummyT(4), dummyT(5) };
const int N = sizeof(array)/sizeof(dummyT);
// Test indirect_iterator_generator
{
dummyT* ptr[N];
for (int k = 0; k < N; ++k)
ptr[k] = array + k;
typedef boost::indirect_iterator_generator<dummyT**
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
, dummyT
#endif
>::type indirect_iterator;
typedef boost::indirect_iterator_generator<dummyT**, const dummyT>::type const_indirect_iterator;
indirect_iterator i(ptr);
boost::random_access_iterator_test(i, N, array);
#ifndef BOOST_NO_STD_ITERATOR_TRAITS
boost::random_access_iterator_test(boost::make_indirect_iterator(ptr), N, array);
#endif
// check operator->
assert((*i).m_x == i->foo());
const_indirect_iterator j(ptr);
boost::random_access_iterator_test(j, N, array);
dummyT*const* const_ptr = ptr;
#ifndef BOOST_NO_STD_ITERATOR_TRAITS
boost::random_access_iterator_test(boost::make_indirect_iterator(const_ptr), N, array);
#endif
boost::const_nonconst_iterator_test(i, ++j);
more_indirect_iterator_tests();
}
std::cout << "test successful " << std::endl;
return 0;
}

View File

@ -11,15 +11,15 @@
// Revision History
// 21 Jan 01 Initial version (Jeremy Siek)
#include <list>
#include <boost/config.hpp>
#include <list>
#include <boost/pending/iterator_adaptors.hpp>
#include <boost/detail/iterator.hpp>
int main()
{
typedef boost::iterator_adaptor<int*, boost::default_iterator_policies,
boost::iterator<std::bidirectional_iterator_tag, int> > adaptor_type;
typedef boost::iterator_adaptor<std::list<int>::iterator,
boost::default_iterator_policies,
int,int&,int*,std::bidirectional_iterator_tag> adaptor_type;
adaptor_type i;
i += 4;

View File

@ -11,16 +11,16 @@
// Revision History
// 21 Jan 01 Initial version (Jeremy Siek)
#include <boost/config.hpp>
#include <iostream>
#include <iterator>
#include <boost/config.hpp>
#include <boost/pending/iterator_adaptors.hpp>
#include <boost/detail/iterator.hpp>
int main()
{
typedef boost::iterator_adaptor<int*, boost::default_iterator_policies,
boost::iterator<std::input_iterator_tag, int> > adaptor_type;
typedef boost::iterator_adaptor<std::istream_iterator<int>,
boost::default_iterator_policies,
int,int&,int*,std::input_iterator_tag> adaptor_type;
adaptor_type iter;
--iter;

View File

@ -1,32 +0,0 @@
// Test boost/pending/iterator_adaptors.hpp
// (C) Copyright Jeremy Siek 1999. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 21 Jan 01 Initial version (Jeremy Siek)
#include <list>
#include <boost/config.hpp>
#include <boost/pending/iterator_adaptors.hpp>
#include <boost/detail/iterator.hpp>
class foo {
public:
void bar() { }
};
int main()
{
typedef boost::iterator_adaptor<foo*, boost::default_iterator_policies,
boost::iterator<std::input_iterator_tag, foo> > adaptor_type;
adaptor_type i;
i->bar();
return 0;
}

61
iter_traits_gen_test.cpp Normal file
View File

@ -0,0 +1,61 @@
// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// 04 Nov 2001 Jeremy Siek
// Updated with respect to new named parameter interface.
// 08 Mar 2001 Jeremy Siek
// Initial checkin.
#include <boost/iterator_adaptors.hpp>
#include <boost/pending/iterator_tests.hpp>
#include <boost/static_assert.hpp>
class bar { };
void foo(bar) { }
int
main()
{
using boost::dummyT;
dummyT array[] = { dummyT(0), dummyT(1), dummyT(2),
dummyT(3), dummyT(4), dummyT(5) };
typedef boost::iterator_adaptor<dummyT*,
boost::default_iterator_policies, dummyT> my_iter;
my_iter mi(array);
{
typedef boost::iterator_adaptor<my_iter, boost::default_iterator_policies,
boost::reference_is<dummyT>,
boost::iterator_category_is<std::input_iterator_tag> > iter_type;
BOOST_STATIC_ASSERT((boost::is_same<iter_type::iterator_category*,
std::input_iterator_tag*>::value));
BOOST_STATIC_ASSERT(( ! boost::is_convertible<iter_type::iterator_category*,
std::forward_iterator_tag*>::value));
iter_type i(mi);
boost::input_iterator_test(i, dummyT(0), dummyT(1));
}
{
typedef boost::iterator_adaptor<dummyT*,
boost::default_iterator_policies,
boost::value_type_is<dummyT>,
boost::reference_is<const dummyT&>,
boost::pointer_is<const dummyT*> ,
boost::iterator_category_is<std::forward_iterator_tag>,
boost::difference_type_is<std::ptrdiff_t> > adaptor_type;
adaptor_type i(array);
boost::input_iterator_test(i, dummyT(0), dummyT(1));
int zero = 0;
if (zero) // don't do this, just make sure it compiles
assert((*i).m_x == i->foo());
}
return 0;
}

View File

@ -7,7 +7,7 @@
#include <functional>
#include <algorithm>
#include <iostream>
#include <boost/pending/iterator_adaptors.hpp>
#include <boost/iterator_adaptors.hpp>
#include <boost/pending/integer_range.hpp>
int
@ -21,8 +21,7 @@ main(int, char*[])
int x[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
typedef std::binder1st< std::multiplies<int> > Function;
typedef boost::transform_iterator<Function, int*,
boost::iterator<std::random_access_iterator_tag, int>
typedef boost::transform_iterator_generator<Function, int*
>::type doubling_iterator;
doubling_iterator i(x, std::bind1st(std::multiplies<int>(), 2)),

View File

@ -1,4 +1,4 @@
// Demonstrate and test boost/operators.hpp on std::iterators -------------//
// Test boost/iterator_adaptors.hpp
// (C) Copyright Jeremy Siek 1999. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
@ -9,6 +9,24 @@
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 30 Nov 01 Added permutation_iterator.(Toon Knapen)
// 19 Nov 01 Added generator_iterator. (Jens Maurer)
// 04 Nov 01 Updated with respect to change in named parameters.
// (Jeremy Siek)
// 08 Mar 01 Moved indirect and transform tests to separate files.
// (Jeremy Siek)
// 19 Feb 01 Take adavantage of improved iterator_traits to do more tests
// on MSVC. Hack around an MSVC-with-STLport internal compiler
// error. (David Abrahams)
// 11 Feb 01 Added test of operator-> for forward and input iterators.
// (Jeremy Siek)
// 11 Feb 01 Borland fixes (David Abrahams)
// 10 Feb 01 Use new adaptors interface. (David Abrahams)
// 10 Feb 01 Use new filter_ interface. (David Abrahams)
// 09 Feb 01 Use new reverse_ and indirect_ interfaces. Replace
// BOOST_NO_STD_ITERATOR_TRAITS with
// BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION to prove we've
// normalized to core compiler capabilities (David Abrahams)
// 08 Feb 01 Use Jeremy's new make_reverse_iterator form; add more
// comprehensive testing. Force-decay array function arguments to
// pointers.
@ -33,40 +51,25 @@
#include <algorithm>
#include <functional>
#include <numeric>
#include <boost/iterator_adaptors.hpp>
#include <boost/generator_iterator.hpp>
#include <boost/pending/iterator_tests.hpp>
#include <boost/pending/integer_range.hpp>
#include <boost/concept_archetype.hpp>
#include <boost/type_traits/same_traits.hpp>
#include <boost/permutation_iterator.hpp>
#include <stdlib.h>
#include <vector>
#include <deque>
#include <set>
#include <list>
struct my_iterator_tag : public std::random_access_iterator_tag { };
using boost::dummyT;
struct my_iter_traits {
typedef dummyT value_type;
typedef dummyT* pointer;
typedef dummyT& reference;
typedef my_iterator_tag iterator_category;
typedef std::ptrdiff_t difference_type;
};
struct my_const_iter_traits {
typedef dummyT value_type;
typedef const dummyT* pointer;
typedef const dummyT& reference;
typedef my_iterator_tag iterator_category;
typedef std::ptrdiff_t difference_type;
};
typedef boost::iterator_adaptor<dummyT*,
boost::default_iterator_policies, my_iter_traits> my_iterator;
typedef boost::iterator_adaptor<const dummyT*,
boost::default_iterator_policies, my_const_iter_traits> const_my_iterator;
struct mult_functor {
typedef int result_type;
@ -99,85 +102,21 @@ struct one_or_four {
}
};
typedef std::vector<int> storage;
typedef std::deque<int> storage;
typedef std::deque<int*> pointer_deque;
typedef std::set<storage::iterator> iterator_set;
void more_indirect_iterator_tests()
template <class T> struct foo;
void blah(int) { }
struct my_gen
{
// For some reason all heck breaks loose in the compiler under these conditions.
#if !defined(BOOST_MSVC) || !defined(__STL_DEBUG)
storage store(1000);
std::generate(store.begin(), store.end(), rand);
pointer_deque ptr_deque;
iterator_set iter_set;
for (storage::iterator p = store.begin(); p != store.end(); ++p)
{
ptr_deque.push_back(&*p);
iter_set.insert(p);
}
typedef boost::indirect_iterator_pair_generator<
pointer_deque::iterator,
const int*
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
, boost::iterator<std::random_access_iterator_tag,int,std::ptrdiff_t,const int*,const int&>
, boost::iterator<std::random_access_iterator_tag,int>
#endif
> IndirectDeque;
IndirectDeque::iterator db(ptr_deque.begin());
IndirectDeque::iterator de(ptr_deque.end());
assert(static_cast<std::size_t>(de - db) == store.size());
assert(db + store.size() == de);
IndirectDeque::const_iterator dci(db);
assert(db == dci);
assert(dci == db);
assert(dci != de);
assert(dci < de);
assert(dci <= de);
assert(de >= dci);
assert(de > dci);
dci = de;
assert(dci == de);
boost::random_access_iterator_test(db + 1, store.size() - 1, boost::next(store.begin()));
*db = 999;
assert(store.front() == 999);
typedef boost::indirect_iterator_generator<
iterator_set::iterator
# ifdef BOOST_NO_STD_ITERATOR_TRAITS
, boost::iterator<std::random_access_iterator_tag,int>
# endif
>::type indirect_set_iterator;
typedef boost::indirect_iterator_generator<
iterator_set::iterator
# ifdef BOOST_NO_STD_ITERATOR_TRAITS
, boost::iterator<std::random_access_iterator_tag,int,std::ptrdiff_t,const int*,const int&>
# endif
>::type const_indirect_set_iterator;
indirect_set_iterator sb(iter_set.begin());
indirect_set_iterator se(iter_set.end());
const_indirect_set_iterator sci(iter_set.begin());
assert(sci == sb);
assert(sci != se);
sci = se;
assert(sci == se);
*boost::prior(se) = 888;
assert(store.back() == 888);
assert(std::equal(sb, se, store.begin()));
boost::bidirectional_iterator_test(boost::next(sb), store[1], store[2]);
assert(std::equal(db, de, store.begin()));
#endif
}
typedef int result_type;
my_gen() : n(0) { }
int operator()() { return ++n; }
int n;
};
int
main()
@ -187,88 +126,71 @@ main()
const int N = sizeof(array)/sizeof(dummyT);
// sanity check, if this doesn't pass the test is buggy
boost::random_access_iterator_test(array,N,array);
boost::random_access_iterator_test(array, N, array);
// Check that the policy concept checks and the default policy
// implementation match up.
boost::function_requires<
boost::RandomAccessIteratorPoliciesConcept<
boost::default_iterator_policies, int*,
boost::default_iterator_policies,
boost::iterator_adaptor<storage::iterator, boost::default_iterator_policies>,
boost::iterator<std::random_access_iterator_tag, int, std::ptrdiff_t,
int*, int&>
> >();
// Test the named parameters
{
// Test computation of defaults
typedef boost::iterator_adaptor<int*, boost::default_iterator_policies,
boost::value_type_is<int> > Iter1;
// don't use std::iterator_traits here to avoid VC++ problems
BOOST_STATIC_ASSERT((boost::is_same<Iter1::value_type, int>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::reference, int&>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::pointer, int*>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::difference_type, std::ptrdiff_t>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::iterator_category, std::random_access_iterator_tag>::value));
}
{
// Test computation of default when the Value is const
typedef boost::iterator_adaptor<std::list<int>::iterator,
boost::default_iterator_policies,
boost::value_type_is<const int> > Iter1;
BOOST_STATIC_ASSERT((boost::is_same<Iter1::value_type, int>::value));
#if defined(__BORLANDC__) || defined(BOOST_MSVC) && BOOST_MSVC <= 1300
// We currently don't know how to workaround this bug.
BOOST_STATIC_ASSERT((boost::is_same<Iter1::reference, int&>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::pointer, int*>::value));
#else
BOOST_STATIC_ASSERT((boost::is_same<Iter1::reference, const int&>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::pointer, const int*>::value));
#endif
}
{
// Test with no defaults
typedef boost::iterator_adaptor<int*, boost::default_iterator_policies,
boost::reference_is<long>,
boost::pointer_is<float*>,
boost::value_type_is<char>,
boost::iterator_category_is<std::input_iterator_tag>,
boost::difference_type_is<int>
> Iter1;
BOOST_STATIC_ASSERT((boost::is_same<Iter1::value_type, char>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::reference, long>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::pointer, float*>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::difference_type, int>::value));
BOOST_STATIC_ASSERT((boost::is_same<Iter1::iterator_category, std::input_iterator_tag>::value));
}
// Test the iterator_adaptor
{
my_iterator i = array;
boost::iterator_adaptor<dummyT*, boost::default_iterator_policies, dummyT> i(array);
boost::random_access_iterator_test(i, N, array);
const_my_iterator j = array;
boost::iterator_adaptor<const dummyT*, boost::default_iterator_policies, const dummyT> j(array);
boost::random_access_iterator_test(j, N, array);
boost::const_nonconst_iterator_test(i, ++j);
}
// Test transform_iterator
{
int x[N], y[N];
for (int k = 0; k < N; ++k)
x[k] = k;
std::copy(x, x + N, y);
for (int k2 = 0; k2 < N; ++k2)
x[k2] = x[k2] * 2;
boost::transform_iterator_generator<mult_functor, int*>::type
i(y, mult_functor(2));
boost::input_iterator_test(i, x[0], x[1]);
boost::input_iterator_test(boost::make_transform_iterator(&y[0], mult_functor(2)), x[0], x[1]);
}
// Test indirect_iterator_generator
{
dummyT* ptr[N];
for (int k = 0; k < N; ++k)
ptr[k] = array + k;
typedef boost::indirect_iterator_generator<dummyT**
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
, boost::iterator<std::random_access_iterator_tag,dummyT>
#endif
>::type indirect_iterator;
typedef boost::indirect_iterator_generator<dummyT**
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
, boost::iterator<std::random_access_iterator_tag,dummyT,std::ptrdiff_t,const dummyT*,const dummyT&>
#endif
>::type const_indirect_iterator;
indirect_iterator i = ptr;
boost::random_access_iterator_test(i, N, array);
typedef boost::iterator<std::random_access_iterator_tag, dummyT> InnerTraits;
boost::random_access_iterator_test(boost::make_indirect_iterator(ptr, InnerTraits()), N, array);
#ifndef BOOST_NO_STD_ITERATOR_TRAITS
boost::random_access_iterator_test(boost::make_indirect_iterator(ptr), N, array);
#endif
const_indirect_iterator j = ptr;
boost::random_access_iterator_test(j, N, array);
dummyT*const* const_ptr = ptr;
typedef boost::iterator<std::random_access_iterator_tag,dummyT,std::ptrdiff_t,const dummyT*,const dummyT&> ConstInnerTraits;
boost::random_access_iterator_test(boost::make_indirect_iterator(const_ptr, ConstInnerTraits()), N, array);
#ifndef BOOST_NO_STD_ITERATOR_TRAITS
boost::random_access_iterator_test(boost::make_indirect_iterator(const_ptr), N, array);
#endif
boost::const_nonconst_iterator_test(i, ++j);
more_indirect_iterator_tests();
}
// Test projection_iterator_pair_generator
{
typedef std::pair<dummyT,dummyT> Pair;
@ -280,80 +202,90 @@ main()
Pair*, const Pair*
> Projection;
Projection::iterator i = pair_array;
Projection::iterator i(pair_array);
boost::random_access_iterator_test(i, N, array);
boost::random_access_iterator_test(boost::make_projection_iterator(pair_array, select1st_<Pair>()), N, array);
boost::random_access_iterator_test(boost::make_projection_iterator< select1st_<Pair> >(pair_array), N, array);
Projection::const_iterator j = pair_array;
Projection::const_iterator j(pair_array);
boost::random_access_iterator_test(j, N, array);
boost::random_access_iterator_test(boost::make_const_projection_iterator(pair_array, select1st_<Pair>()), N, array);
boost::random_access_iterator_test(boost::make_const_projection_iterator< select1st_<Pair> >(pair_array), N, array);
boost::random_access_iterator_test(boost::make_const_projection_iterator<select1st_<Pair> >(pair_array), N, array);
boost::const_nonconst_iterator_test(i, ++j);
}
// Test reverse_iterator_generator
{
dummyT reversed[N];
std::copy(array, array + N, reversed);
std::reverse(reversed, reversed + N);
typedef boost::reverse_iterator_generator<dummyT*,
boost::iterator<std::random_access_iterator_tag,dummyT>
typedef boost::reverse_iterator_generator<dummyT*
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) || defined(BOOST_NO_STD_ITERATOR_TRAITS)
, dummyT
#endif
>::type reverse_iterator;
typedef boost::reverse_iterator_generator<const dummyT*,
boost::iterator<std::random_access_iterator_tag,const dummyT>
>::type const_reverse_iterator;
reverse_iterator i = reversed + N;
reverse_iterator i(reversed + N);
boost::random_access_iterator_test(i, N, array);
typedef boost::iterator<std::random_access_iterator_tag,dummyT> ReverseTraits;
boost::random_access_iterator_test(boost::make_reverse_iterator<ReverseTraits>(reversed + N), N, array);
#ifndef BOOST_NO_STD_ITERATOR_TRAITS
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(BOOST_NO_STD_ITERATOR_TRAITS)
boost::random_access_iterator_test(boost::make_reverse_iterator(reversed + N), N, array);
#endif
const_reverse_iterator j = reversed + N;
typedef boost::reverse_iterator_generator<const dummyT*
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) || defined(BOOST_NO_STD_ITERATOR_TRAITS)
, dummyT, const dummyT&, const dummyT
#endif
>::type const_reverse_iterator;
const_reverse_iterator j(reversed + N);
boost::random_access_iterator_test(j, N, array);
const dummyT* const_reversed = reversed;
typedef boost::iterator<std::random_access_iterator_tag,const dummyT> ConstReverseTraits;
boost::random_access_iterator_test(boost::make_reverse_iterator<ConstReverseTraits>(const_reversed + N), N, array);
#ifndef BOOST_NO_STD_ITERATOR_TRAITS
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(BOOST_NO_STD_ITERATOR_TRAITS)
boost::random_access_iterator_test(boost::make_reverse_iterator(const_reversed + N), N, array);
#endif
boost::const_nonconst_iterator_test(i, ++j);
}
// Test reverse_iterator_generator again, with traits fully deducible on most platforms
#if !defined(BOOST_MSVC) || defined(__SGI_STL_PORT)
// Test reverse_iterator_generator again, with traits fully deducible on all platforms
{
std::deque<dummyT> reversed_container;
std::copy(array, array + N, std::back_inserter(reversed_container));
std::reverse_copy(array, array + N, std::back_inserter(reversed_container));
const std::deque<dummyT>::iterator reversed = reversed_container.begin();
std::reverse(reversed, reversed + N);
typedef boost::reverse_iterator_generator<
std::deque<dummyT>::iterator>::type reverse_iterator;
typedef boost::reverse_iterator_generator<
std::deque<dummyT>::const_iterator>::type const_reverse_iterator;
std::deque<dummyT>::const_iterator, const dummyT>::type const_reverse_iterator;
reverse_iterator i = reversed + N;
// MSVC/STLport gives an INTERNAL COMPILER ERROR when any computation
// (e.g. "reversed + N") is used in the constructor below.
const std::deque<dummyT>::iterator finish = reversed_container.end();
reverse_iterator i(finish);
boost::random_access_iterator_test(i, N, array);
boost::random_access_iterator_test(boost::make_reverse_iterator(reversed + N), N, array);
const_reverse_iterator j = reversed + N;
const_reverse_iterator j = reverse_iterator(finish);
boost::random_access_iterator_test(j, N, array);
const std::deque<dummyT>::const_iterator const_reversed = reversed;
boost::random_access_iterator_test(boost::make_reverse_iterator(const_reversed + N), N, array);
boost::const_nonconst_iterator_test(i, ++j);
}
// Many compilers' builtin deque iterators don't interoperate well, though
// STLport fixes that problem.
#if defined(__SGI_STL_PORT) || !defined(__GNUC__) && !defined(__BORLANDC__) && (!defined(BOOST_MSVC) || BOOST_MSVC > 1200)
boost::const_nonconst_iterator_test(i, ++j);
#endif
}
// Test integer_range's iterators
{
@ -364,31 +296,154 @@ main()
// Test filter iterator
{
typedef boost::filter_iterator_generator<one_or_four, dummyT*,
boost::iterator<std::forward_iterator_tag, dummyT, std::ptrdiff_t,
dummyT*, dummyT&> > FilterGen;
typedef FilterGen::type FilterIter;
typedef FilterGen::policies_type FilterPolicies;
FilterIter i(array, FilterPolicies(one_or_four(), array + N));
// Using typedefs for filter_gen::type confused Borland terribly.
typedef boost::detail::non_bidirectional_category<dummyT*>::type category;
typedef boost::filter_iterator_generator<one_or_four, dummyT*
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) || defined(BOOST_NO_STD_ITERATOR_TRAITS)
, dummyT
#endif
>::type filter_iter;
#if defined(__BORLANDC__)
// Borland is choking on accessing the policies_type explicitly
// from the filter_iter.
boost::forward_iterator_test(make_filter_iterator(array, array+N,
one_or_four()),
dummyT(1), dummyT(4));
#else
filter_iter i(array, filter_iter::policies_type(one_or_four(), array + N));
boost::forward_iterator_test(i, dummyT(1), dummyT(4));
#endif
typedef boost::iterator<std::forward_iterator_tag, dummyT, std::ptrdiff_t, dummyT*, dummyT&> FilterTraits;
boost::forward_iterator_test(boost::make_filter_iterator<FilterTraits>
(array, array + N, one_or_four() ), dummyT(1), dummyT(4));
#if !defined(__BORLANDC__)
//
enum { is_forward = boost::is_same<
filter_iter::iterator_category,
std::forward_iterator_tag>::value };
BOOST_STATIC_ASSERT(is_forward);
#endif
boost::forward_iterator_test(boost::make_filter_iterator<FilterTraits, one_or_four>
(array, array + N), dummyT(1), dummyT(4));
// On compilers not supporting partial specialization, we can do more type
// deduction with deque iterators than with pointers... unless the library
// is broken ;-(
#if !defined(BOOST_MSVC) || BOOST_MSVC > 1200 || defined(__SGI_STL_PORT)
std::deque<dummyT> array2;
std::copy(array+0, array+N, std::back_inserter(array2));
boost::forward_iterator_test(
boost::make_filter_iterator(array2.begin(), array2.end(), one_or_four()),
dummyT(1), dummyT(4));
#ifndef BOOST_NO_STD_ITERATOR_TRAITS
boost::forward_iterator_test(boost::make_filter_iterator(
array, array + N, one_or_four()), dummyT(1), dummyT(4));
boost::forward_iterator_test(
boost::make_filter_iterator<one_or_four>(array2.begin(), array2.end()),
dummyT(1), dummyT(4));
#endif
boost::forward_iterator_test(boost::make_filter_iterator<one_or_four>(
array, array + N), dummyT(1), dummyT(4));
#if !defined(BOOST_MSVC) || BOOST_MSVC > 1200 // This just freaks MSVC out completely
boost::forward_iterator_test(
boost::make_filter_iterator<one_or_four>(
boost::make_reverse_iterator(array2.end()),
boost::make_reverse_iterator(array2.begin())
),
dummyT(4), dummyT(1));
#endif
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(BOOST_NO_STD_ITERATOR_TRAITS)
boost::forward_iterator_test(
boost::make_filter_iterator(array+0, array+N, one_or_four()),
dummyT(1), dummyT(4));
boost::forward_iterator_test(
boost::make_filter_iterator<one_or_four>(array, array + N),
dummyT(1), dummyT(4));
#endif
}
// check operator-> with a forward iterator
{
boost::forward_iterator_archetype<dummyT> forward_iter;
#if defined(__BORLANDC__)
typedef boost::iterator_adaptor<boost::forward_iterator_archetype<dummyT>,
boost::default_iterator_policies,
dummyT, const dummyT&, const dummyT*,
std::forward_iterator_tag, std::ptrdiff_t> adaptor_type;
#else
typedef boost::iterator_adaptor<boost::forward_iterator_archetype<dummyT>,
boost::default_iterator_policies,
boost::reference_is<const dummyT&>,
boost::pointer_is<const dummyT*> ,
boost::iterator_category_is<std::forward_iterator_tag>,
boost::value_type_is<dummyT>,
boost::difference_type_is<std::ptrdiff_t>
> adaptor_type;
#endif
adaptor_type i(forward_iter);
int zero = 0;
if (zero) // don't do this, just make sure it compiles
assert((*i).m_x == i->foo());
}
// check operator-> with an input iterator
{
boost::input_iterator_archetype<dummyT> input_iter;
typedef boost::iterator_adaptor<boost::input_iterator_archetype<dummyT>,
boost::default_iterator_policies,
dummyT, const dummyT&, const dummyT*,
std::input_iterator_tag, std::ptrdiff_t> adaptor_type;
adaptor_type i(input_iter);
int zero = 0;
if (zero) // don't do this, just make sure it compiles
assert((*i).m_x == i->foo());
}
{
// check generator_iterator
my_gen g1;
boost::generator_iterator_generator<my_gen>::type gen =
boost::make_generator_iterator(g1);
assert(*gen == 1);
++gen;
gen++;
assert(*gen == 3);
}
{
// check permutation_iterator
typedef std::deque< int > element_range_type;
typedef std::list< int > index_type;
static const int element_range_size = 10;
static const int index_size = 4;
element_range_type elements( element_range_size );
for(element_range_type::iterator el_it = elements.begin();
el_it != elements.end();
++el_it)
{
*el_it = std::distance( elements.begin(), el_it );
}
index_type indices( index_size );
for(index_type::iterator i_it = indices.begin();
i_it != indices.end();
++i_it)
{
*i_it = element_range_size - index_size
+ std::distance(indices.begin(), i_it );
}
std::reverse( indices.begin(), indices.end() );
typedef boost::permutation_iterator_generator< element_range_type::iterator, index_type::iterator >::type permutation_type;
permutation_type begin = boost::make_permutation_iterator( elements.begin(), indices.begin() );
permutation_type end = boost::make_permutation_iterator( elements.begin(), indices.end() );
int expected_outcome[] = { 9, 8, 7, 6 };
assert( std::equal( begin, end, expected_outcome ) );
}
std::cout << "test successful " << std::endl;
return 0;
}

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@ -7,6 +7,14 @@
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 04 Mar 2001 Patches for Intel C++ (Dave Abrahams)
// 19 Feb 2001 Take advantage of improved iterator_traits to do more tests
// on MSVC. Reordered some #ifdefs for coherency.
// (David Abrahams)
// 13 Feb 2001 Test new VC6 workarounds (David Abrahams)
// 11 Feb 2001 Final fixes for Borland (David Abrahams)
// 11 Feb 2001 Some fixes for Borland get it closer on that compiler
// (David Abrahams)
// 07 Feb 2001 More comprehensive testing; factored out static tests for
// better reuse (David Abrahams)
// 21 Jan 2001 Quick fix to my_iterator, which wasn't returning a
@ -23,35 +31,71 @@
#include <cassert>
#include <iostream>
struct my_iterator
: public boost::forward_iterator_helper<my_iterator, const char, long>
// An iterator for which we can get traits.
struct my_iterator1
: boost::forward_iterator_helper<my_iterator1, char, long, const char*, const char&>
{
my_iterator(const char* p) : m_p(p) {}
my_iterator1(const char* p) : m_p(p) {}
bool operator==(const my_iterator& rhs) const
bool operator==(const my_iterator1& rhs) const
{ return this->m_p == rhs.m_p; }
my_iterator& operator++() { ++this->m_p; return *this; }
my_iterator1& operator++() { ++this->m_p; return *this; }
const char& operator*() { return *m_p; }
private:
const char* m_p;
};
// Used to prove that we don't require std::iterator<> in the hierarchy under
// MSVC6, and that we can compute all the traits for a standard-conforming UDT
// iterator.
struct my_iterator2
: boost::equality_comparable<my_iterator2
, boost::incrementable<my_iterator2
, boost::dereferenceable<my_iterator2,const char*> > >
{
typedef char value_type;
typedef long difference_type;
typedef const char* pointer;
typedef const char& reference;
typedef std::forward_iterator_tag iterator_category;
my_iterator2(const char* p) : m_p(p) {}
bool operator==(const my_iterator2& rhs) const
{ return this->m_p == rhs.m_p; }
my_iterator2& operator++() { ++this->m_p; return *this; }
const char& operator*() { return *m_p; }
private:
const char* m_p;
};
// Used to prove that we're not overly confused by the existence of
// std::iterator<> in the hierarchy under MSVC6 - we should find that
// boost::detail::iterator_traits<my_iterator3>::difference_type is int.
struct my_iterator3 : my_iterator1
{
typedef int difference_type;
my_iterator3(const char* p) : my_iterator1(p) {}
};
template <class Iterator,
class value_type, class difference_type, class pointer, class reference, class category>
struct non_portable_tests
{
// Unfortunately, the VC6 standard library doesn't supply these :(
typedef typename boost::detail::iterator_traits<Iterator>::pointer test_pt;
typedef typename boost::detail::iterator_traits<Iterator>::reference test_rt;
BOOST_STATIC_ASSERT((
boost::is_same<
typename boost::detail::iterator_traits<Iterator>::pointer,
::boost::is_same<
test_pt,
pointer
>::value));
BOOST_STATIC_ASSERT((
boost::is_same<
typename boost::detail::iterator_traits<Iterator>::reference,
::boost::is_same<
test_rt,
reference
>::value));
};
@ -60,15 +104,17 @@ template <class Iterator,
class value_type, class difference_type, class pointer, class reference, class category>
struct portable_tests
{
typedef typename boost::detail::iterator_traits<Iterator>::difference_type test_dt;
typedef typename boost::detail::iterator_traits<Iterator>::iterator_category test_cat;
BOOST_STATIC_ASSERT((
boost::is_same<
typename boost::detail::iterator_traits<Iterator>::difference_type,
::boost::is_same<
test_dt,
difference_type
>::value));
BOOST_STATIC_ASSERT((
boost::is_same<
typename boost::detail::iterator_traits<Iterator>::iterator_category,
::boost::is_same<
test_cat,
category
>::value));
};
@ -79,9 +125,10 @@ template <class Iterator,
struct input_iterator_test
: portable_tests<Iterator,value_type,difference_type,pointer,reference,category>
{
typedef typename boost::detail::iterator_traits<Iterator>::value_type test_vt;
BOOST_STATIC_ASSERT((
boost::is_same<
typename boost::detail::iterator_traits<Iterator>::value_type,
::boost::is_same<
test_vt,
value_type
>::value));
};
@ -90,9 +137,7 @@ template <class Iterator,
class value_type, class difference_type, class pointer, class reference, class category>
struct non_pointer_test
: input_iterator_test<Iterator,value_type,difference_type,pointer,reference,category>
#if !defined(BOOST_MSVC) || defined(__SGI_STL_PORT)
, non_portable_tests<Iterator,value_type,difference_type,pointer,reference,category>
#endif
{
};
@ -109,14 +154,21 @@ struct maybe_pointer_test
input_iterator_test<std::istream_iterator<int>, int, std::ptrdiff_t, int*, int&, std::input_iterator_tag>
istream_iterator_test;
//
#if defined(__BORLANDC__) && !defined(__SGI_STL_PORT)
typedef ::std::char_traits<char>::off_type distance;
non_pointer_test<std::ostream_iterator<int>,int,
distance,int*,int&,std::output_iterator_tag> ostream_iterator_test;
#elif defined(BOOST_MSVC_STD_ITERATOR)
non_pointer_test<std::ostream_iterator<int>,
#if !defined(BOOST_MSVC) || defined(__SGI_STL_PORT)
void,
#else // the VC6 standard lib gives ostream_iterator an incorrect value_type
int,
#endif
void, void, void, std::output_iterator_tag>
int, void, void, void, std::output_iterator_tag>
ostream_iterator_test;
#else
non_pointer_test<std::ostream_iterator<int>,
void, void, void, void, std::output_iterator_tag>
ostream_iterator_test;
#endif
#ifdef __KCC
typedef long std_list_diff_type;
@ -132,8 +184,14 @@ maybe_pointer_test<std::vector<int>::iterator, int, std::ptrdiff_t, int*, int&,
maybe_pointer_test<int*, int, std::ptrdiff_t, int*, int&, std::random_access_iterator_tag>
int_pointer_test;
non_pointer_test<my_iterator, const char, long, const char*, const char&, std::forward_iterator_tag>
my_iterator_test;
non_pointer_test<my_iterator1, char, long, const char*, const char&, std::forward_iterator_tag>
my_iterator1_test;
non_pointer_test<my_iterator2, char, long, const char*, const char&, std::forward_iterator_tag>
my_iterator2_test;
non_pointer_test<my_iterator3, char, int, const char*, const char&, std::forward_iterator_tag>
my_iterator3_test;
int main()
{
@ -149,7 +207,9 @@ int main()
assert(boost::detail::distance(v.begin(), v.end()) == length);
assert(boost::detail::distance(&ints[0], ints + length) == length);
assert(boost::detail::distance(my_iterator(chars), my_iterator(chars + length)) == length);
assert(boost::detail::distance(my_iterator1(chars), my_iterator1(chars + length)) == length);
assert(boost::detail::distance(my_iterator2(chars), my_iterator2(chars + length)) == length);
assert(boost::detail::distance(my_iterator3(chars), my_iterator3(chars + length)) == length);
}
return 0;
}

View File

@ -9,16 +9,29 @@
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 29 May 01 Factored implementation, added comparison tests, use Test Tools
// library (Daryle Walker)
// 12 Dec 99 Initial version with iterator operators (Jeremy Siek)
#include <string>
#include <iostream>
using namespace std;
#define BOOST_INCLUDE_MAIN
#include <boost/test/test_tools.hpp> // for main
#include <boost/operators.hpp>
using namespace boost;
#include <boost/config.hpp> // for BOOST_STATIC_CONSTANT
#include <boost/cstdlib.hpp> // for boost::exit_success
#include <boost/operators.hpp> // for boost::random_access_iterator_helper
#include <cstddef> // for std::ptrdiff_t, std::size_t
#include <cstring> // for std::strcmp
#include <iostream> // for std::cout (std::endl, ends, and flush indirectly)
#include <string> // for std::string
#include <strstream> // for std::ostrstream
# ifdef BOOST_NO_STDC_NAMESPACE
namespace std { using ::strcmp; }
# endif
// Iterator test class
template <class T, class R, class P>
struct test_iter
: public boost::random_access_iterator_helper<
@ -29,7 +42,7 @@ struct test_iter
typedef std::ptrdiff_t Distance;
public:
test_iter(T* i) : _i(i) { }
explicit test_iter(T* i =0) : _i(i) { }
test_iter(const self& x) : _i(x._i) { }
self& operator=(const self& x) { _i = x._i; return *this; }
Reference operator*() const { return *_i; }
@ -43,127 +56,287 @@ public:
return x._i - y._i;
}
protected:
T* _i;
P _i;
};
int
main()
// Iterator operator testing classes
class test_opr_base
{
string array[] = { "apple", "orange", "pear", "peach", "grape", "plum" };
{
test_iter<string,string&,string*> i = array,
ie = array + sizeof(array)/sizeof(string);
protected:
// Test data and types
BOOST_STATIC_CONSTANT( std::size_t, fruit_length = 6u );
BOOST_STATIC_CONSTANT( std::size_t, scratch_length = 40u );
// Tests for all of the operators added by random_access_iterator_helper
typedef std::string fruit_array_type[ fruit_length ];
typedef char scratch_array_type[ scratch_length ];
// test i++
while (i != ie)
cout << *i++ << " ";
cout << endl;
i = array;
static fruit_array_type fruit;
static scratch_array_type scratch;
// test i--
while (ie != i) {
ie--;
cout << *ie << " ";
}
cout << endl;
ie = array + sizeof(array)/sizeof(string);
}; // test_opr_base
// test i->m
while (i != ie) {
cout << i->size() << " ";
++i;
}
cout << endl;
i = array;
#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
// A definition is required even for integral static constants
const std::size_t test_opr_base::fruit_length;
const std::size_t test_opr_base::scratch_length;
#endif
// test i + n
while (i < ie) {
cout << *i << " ";
i = i + 2;
}
cout << endl;
i = array;
template <typename T, typename R = T&, typename P = T*>
class test_opr
: public test_opr_base
{
typedef test_opr<T, R, P> self_type;
// test n + i
while (i < ie) {
cout << *i << " ";
i = ptrdiff_t(2) + i;
}
cout << endl;
i = array;
public:
// Types
typedef T value_type;
typedef R reference;
typedef P pointer;
// test i - n
while (ie > i) {
ie = ie - 2;
cout << *ie << " ";
}
cout << endl;
ie = array + sizeof(array)/sizeof(string);
typedef test_iter<T, R, P> iter_type;
// test i[n]
for (std::size_t j = 0; j < sizeof(array)/sizeof(string); ++j)
cout << i[j] << " ";
cout << endl;
}
{
test_iter<string, const string&, const string*> i = array,
ie = array + sizeof(array)/sizeof(string);
// Test controller
static void master_test( char const name[] );
// Tests for all of the operators added by random_access_iterator_helper
private:
// Test data
static iter_type const fruit_begin;
static iter_type const fruit_end;
// test i++
while (i != ie)
cout << *i++ << " ";
cout << endl;
i = array;
// Test parts
static void post_increment_test();
static void post_decrement_test();
static void indirect_referral_test();
static void offset_addition_test();
static void reverse_offset_addition_test();
static void offset_subtraction_test();
static void comparison_test();
static void indexing_test();
// test i--
while (ie != i) {
ie--;
cout << *ie << " ";
}
cout << endl;
ie = array + sizeof(array)/sizeof(string);
}; // test_opr
// test i->m
while (i != ie) {
cout << i->size() << " ";
++i;
}
cout << endl;
i = array;
// test i + n
while (i < ie) {
cout << *i << " ";
i = i + 2;
}
cout << endl;
i = array;
// Class-static data definitions
test_opr_base::fruit_array_type
test_opr_base::fruit = { "apple", "orange", "pear", "peach", "grape", "plum" };
// test n + i
while (i < ie) {
cout << *i << " ";
i = ptrdiff_t(2) + i;
}
cout << endl;
i = array;
test_opr_base::scratch_array_type
test_opr_base::scratch = "";
// test i - n
while (ie > i) {
ie = ie - 2;
cout << *ie << " ";
}
cout << endl;
ie = array + sizeof(array)/sizeof(string);
template <typename T, typename R, typename P>
typename test_opr<T, R, P>::iter_type const
test_opr<T, R, P>::fruit_begin = test_iter<T,R,P>( fruit );
// test i[n]
for (std::size_t j = 0; j < sizeof(array)/sizeof(string); ++j)
cout << i[j] << " ";
cout << endl;
}
return 0;
template <typename T, typename R, typename P>
typename test_opr<T, R, P>::iter_type const
test_opr<T, R, P>::fruit_end = test_iter<T,R,P>( fruit + fruit_length );
// Main testing function
int
test_main( int , char * [] )
{
using std::string;
typedef test_opr<string, string &, string *> test1_type;
typedef test_opr<string, string const &, string const *> test2_type;
test1_type::master_test( "non-const string" );
test2_type::master_test( "const string" );
return boost::exit_success;
}
// Tests for all of the operators added by random_access_iterator_helper
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::master_test
(
char const name[]
)
{
std::cout << "Doing test run for " << name << '.' << std::endl;
post_increment_test();
post_decrement_test();
indirect_referral_test();
offset_addition_test();
reverse_offset_addition_test();
offset_subtraction_test();
comparison_test();
indexing_test();
}
// Test post-increment
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::post_increment_test
(
)
{
std::cout << "\tDoing post-increment test." << std::endl;
std::ostrstream oss( scratch, scratch_length );
for ( iter_type i = fruit_begin ; i != fruit_end ; )
{
oss << *i++ << ' ';
}
oss << std::ends;
BOOST_TEST( std::strcmp(oss.str(), "apple orange pear peach grape plum ")
== 0 );
}
// Test post-decrement
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::post_decrement_test
(
)
{
std::cout << "\tDoing post-decrement test." << std::endl;
std::ostrstream oss( scratch, scratch_length );
for ( iter_type i = fruit_end ; i != fruit_begin ; )
{
i--;
oss << *i << ' ';
}
oss << std::ends;
BOOST_TEST( std::strcmp(oss.str(), "plum grape peach pear orange apple ")
== 0 );
}
// Test indirect structure referral
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::indirect_referral_test
(
)
{
std::cout << "\tDoing indirect reference test." << std::endl;
std::ostrstream oss( scratch, scratch_length );
for ( iter_type i = fruit_begin ; i != fruit_end ; ++i )
{
oss << i->size() << ' ';
}
oss << std::ends;
BOOST_TEST( std::strcmp(oss.str(), "5 6 4 5 5 4 ") == 0 );
}
// Test offset addition
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::offset_addition_test
(
)
{
std::cout << "\tDoing offset addition test." << std::endl;
std::ptrdiff_t const two = 2;
std::ostrstream oss( scratch, scratch_length );
for ( iter_type i = fruit_begin ; i != fruit_end ; i = i + two )
{
oss << *i << ' ';
}
oss << std::ends;
BOOST_TEST( std::strcmp(oss.str(), "apple pear grape ") == 0 );
}
// Test offset addition, in reverse order
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::reverse_offset_addition_test
(
)
{
std::cout << "\tDoing reverse offset addition test." << std::endl;
std::ptrdiff_t const two = 2;
std::ostrstream oss( scratch, scratch_length );
for ( iter_type i = fruit_begin ; i != fruit_end ; i = two + i )
{
oss << *i << ' ';
}
oss << std::ends;
BOOST_TEST( std::strcmp(oss.str(), "apple pear grape ") == 0 );
}
// Test offset subtraction
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::offset_subtraction_test
(
)
{
std::cout << "\tDoing offset subtraction test." << std::endl;
std::ptrdiff_t const two = 2;
std::ostrstream oss( scratch, scratch_length );
for ( iter_type i = fruit_end ; fruit_begin < i ; )
{
i = i - two;
if ( (fruit_begin < i) || (fruit_begin == i) )
{
oss << *i << ' ';
}
}
oss << std::ends;
BOOST_TEST( std::strcmp(oss.str(), "grape pear apple ") == 0 );
}
// Test comparisons
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::comparison_test
(
)
{
using std::cout;
using std::ptrdiff_t;
cout << "\tDoing comparison tests.\n\t\tPass:";
for ( iter_type i = fruit_begin ; i != fruit_end ; ++i )
{
ptrdiff_t const i_offset = i - fruit_begin;
cout << ' ' << *i << std::flush;
for ( iter_type j = fruit_begin ; j != fruit_end ; ++j )
{
ptrdiff_t const j_offset = j - fruit_begin;
BOOST_TEST( (i != j) == (i_offset != j_offset) );
BOOST_TEST( (i > j) == (i_offset > j_offset) );
BOOST_TEST( (i <= j) == (i_offset <= j_offset) );
BOOST_TEST( (i >= j) == (i_offset >= j_offset) );
}
}
cout << std::endl;
}
// Test indexing
template <typename T, typename R, typename P>
void
test_opr<T, R, P>::indexing_test
(
)
{
std::cout << "\tDoing indexing test." << std::endl;
std::ostrstream oss( scratch, scratch_length );
for ( std::size_t k = 0u ; k < fruit_length ; ++k )
{
oss << fruit_begin[ k ] << ' ';
}
oss << std::ends;
BOOST_TEST( std::strcmp(oss.str(), "apple orange pear peach grape plum ")
== 0 );
}

View File

@ -20,7 +20,7 @@
namespace
{
class DontTreadOnMe : boost::noncopyable
class DontTreadOnMe : private boost::noncopyable
{
public:
DontTreadOnMe() { std::cout << "defanged!" << std::endl; }
@ -35,4 +35,4 @@ int main()
object1 = object2;
return 0;
} // main

View File

@ -7,6 +7,8 @@
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 1 Apr 2001 Fixes for ICL; use BOOST_STATIC_CONSTANT
// 11 Feb 2001 Fixes for Borland (David Abrahams)
// 23 Jan 2001 Added test for wchar_t (David Abrahams)
// 23 Jan 2001 Now statically selecting a test for signed numbers to avoid
// warnings with fancy compilers. Added commentary and
@ -29,13 +31,6 @@
# include <limits>
#endif
// A macro for declaring class compile-time constants.
#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
# define DECLARE_CLASS_CONST(type, init) static const type init
#else
# define DECLARE_CLASS_CONST(type, init) enum { init }
#endif
// =================================================================================
// template class complement_traits<Number> --
//
@ -52,8 +47,8 @@ template <unsigned size> struct complement; // forward
template <class Number, unsigned size>
struct complement_traits_aux
{
DECLARE_CLASS_CONST(Number, max = complement<size>::template traits<Number>::max);
DECLARE_CLASS_CONST(Number, min = complement<size>::template traits<Number>::min);
BOOST_STATIC_CONSTANT(Number, max = complement<size>::template traits<Number>::max);
BOOST_STATIC_CONSTANT(Number, min = complement<size>::template traits<Number>::min);
};
template <unsigned size>
@ -66,11 +61,11 @@ struct complement
// indirection through complement_traits_aux neccessary to keep MSVC happy
typedef complement_traits_aux<Number, size - 1> prev;
public:
DECLARE_CLASS_CONST(Number, max =
BOOST_STATIC_CONSTANT(Number, max =
Number(Number(prev::max) << CHAR_BIT)
+ Number(UCHAR_MAX));
DECLARE_CLASS_CONST(Number, min = Number(Number(prev::min) << CHAR_BIT));
BOOST_STATIC_CONSTANT(Number, min = Number(Number(prev::min) << CHAR_BIT));
};
};
@ -84,8 +79,8 @@ template <> struct complement_base<false>
template <class Number>
struct values
{
DECLARE_CLASS_CONST(Number, min = 0);
DECLARE_CLASS_CONST(Number, max = UCHAR_MAX);
BOOST_STATIC_CONSTANT(Number, min = 0);
BOOST_STATIC_CONSTANT(Number, max = UCHAR_MAX);
};
};
@ -94,8 +89,8 @@ template <> struct complement_base<true>
template <class Number>
struct values
{
DECLARE_CLASS_CONST(Number, min = SCHAR_MIN);
DECLARE_CLASS_CONST(Number, max = SCHAR_MAX);
BOOST_STATIC_CONSTANT(Number, min = SCHAR_MIN);
BOOST_STATIC_CONSTANT(Number, max = SCHAR_MAX);
};
};
@ -106,10 +101,10 @@ struct complement<1>
template <class Number>
struct traits
{
DECLARE_CLASS_CONST(bool, is_signed = boost::detail::is_signed<Number>::value);
DECLARE_CLASS_CONST(Number, min =
BOOST_STATIC_CONSTANT(bool, is_signed = boost::detail::is_signed<Number>::value);
BOOST_STATIC_CONSTANT(Number, min =
complement_base<is_signed>::template values<Number>::min);
DECLARE_CLASS_CONST(Number, max =
BOOST_STATIC_CONSTANT(Number, max =
complement_base<is_signed>::template values<Number>::max);
};
};
@ -120,8 +115,8 @@ struct complement<1>
template <class Number>
struct complement_traits
{
DECLARE_CLASS_CONST(Number, max = (complement_traits_aux<Number, sizeof(Number)>::max));
DECLARE_CLASS_CONST(Number, min = (complement_traits_aux<Number, sizeof(Number)>::min));
BOOST_STATIC_CONSTANT(Number, max = (complement_traits_aux<Number, sizeof(Number)>::max));
BOOST_STATIC_CONSTANT(Number, min = (complement_traits_aux<Number, sizeof(Number)>::min));
};
// =================================================================================
@ -150,9 +145,9 @@ template <> struct stream_as<signed char> {
typedef unsigned char t1; typedef unsigned t2;
};
#if defined(BOOST_MSVC) // No intmax streaming built-in
#if defined(BOOST_MSVC_STD_ITERATOR) // No intmax streaming built-in
// On this platform, __int64 and __uint64 get streamed as strings
// With this library implementation, __int64 and __uint64 get streamed as strings
template <> struct stream_as<boost::uintmax_t> {
typedef std::string t1;
typedef std::string t2;
@ -173,7 +168,7 @@ template <class T> struct promote
}
};
#if defined(BOOST_MSVC) // No intmax streaming built-in
#if defined(BOOST_MSVC_STD_ITERATOR) // No intmax streaming built-in
// On this platform, stream them as long/unsigned long if they fit.
// Otherwise, write a string.
@ -349,8 +344,15 @@ void test(Number* = 0)
<< "digits: " << std::numeric_limits<Number>::digits << "\n"
#endif
<< "..." << std::flush;
typedef typename boost::detail::numeric_traits<Number>::difference_type difference_type;
BOOST_STATIC_ASSERT(boost::detail::is_signed<difference_type>::value);
// factoring out difference_type for the assert below confused Borland :(
typedef boost::detail::is_signed<
#if !defined(BOOST_MSVC) || BOOST_MSVC > 1300
typename
#endif
boost::detail::numeric_traits<Number>::difference_type
> is_signed;
BOOST_STATIC_ASSERT(is_signed::value);
typedef typename boost::detail::if_true<
boost::detail::is_signed<Number>::value
@ -372,7 +374,7 @@ int main()
test<unsigned int>();
test<long>();
test<unsigned long>();
#if defined(ULLONG_MAX) || defined(ULONG_LONG_MAX)
#if defined(BOOST_HAS_LONG_LONG) && !defined(BOOST_NO_INTEGRAL_INT64_T)
test<long long>();
test<unsigned long long>();
#elif defined(BOOST_MSVC)

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@ -8,18 +8,28 @@
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 01 Oct 01 Added tests for "left" operators
// and new grouped operators. (Helmut Zeisel)
// 20 May 01 Output progress messages. Added tests for new operator
// templates. Updated random number generator. Changed tests to
// use Boost Test Tools library. (Daryle Walker)
// 04 Jun 00 Added regression test for a bug I found (David Abrahams)
// 17 Jun 00 Fix for broken compilers (Aleksey Gurtovoy)
// ?? ??? 00 Major update to randomly test all one- and two- argument forms by
// wrapping integral types and comparing the results of operations to
// the results for the raw types (David Abrahams)
// wrapping integral types and comparing the results of operations
// to the results for the raw types (David Abrahams)
// 12 Dec 99 Minor update, output confirmation message.
// 15 Nov 99 Initial version
#include <boost/operators.hpp>
#include <cassert>
#include <iostream>
#include <boost/min_rand.hpp>
#define BOOST_INCLUDE_MAIN
#include <boost/config.hpp> // for BOOST_MSVC
#include <boost/cstdlib.hpp> // for boost::exit_success
#include <boost/operators.hpp> // for the tested items
#include <boost/random/linear_congruential.hpp> // for boost::minstd_rand
#include <boost/test/test_tools.hpp> // for main
#include <iostream> // for std::cout (std::endl indirectly)
namespace
@ -28,14 +38,18 @@ namespace
int true_value(int x) { return x; }
long true_value(long x) { return x; }
signed char true_value(signed char x) { return x; }
short true_value(short x) { return x; }
unsigned int true_value(unsigned int x) { return x; }
unsigned long true_value(unsigned long x) { return x; }
unsigned char true_value(unsigned char x) { return x; }
unsigned short true_value(unsigned short x) { return x; }
// The use of operators<> here tended to obscure interactions with certain
// compiler bugs
// The use of operators<> here tended to obscure
// interactions with certain compiler bugs
template <class T>
class Wrapped1 : boost::operators<Wrapped1<T> >
class Wrapped1
: boost::operators<Wrapped1<T> >
, boost::shiftable<Wrapped1<T> >
{
public:
explicit Wrapped1( T v = T() ) : _value(v) {}
@ -60,6 +74,10 @@ namespace
{ _value &= x._value; return *this; }
Wrapped1& operator^=(const Wrapped1& x)
{ _value ^= x._value; return *this; }
Wrapped1& operator<<=(const Wrapped1& x)
{ _value <<= x._value; return *this; }
Wrapped1& operator>>=(const Wrapped1& x)
{ _value >>= x._value; return *this; }
Wrapped1& operator++() { ++_value; return *this; }
Wrapped1& operator--() { --_value; return *this; }
@ -70,9 +88,11 @@ namespace
T true_value(Wrapped1<T> x) { return x.value(); }
template <class T, class U>
class Wrapped2 :
boost::operators<Wrapped2<T, U> >,
boost::operators2<Wrapped2<T, U>, U>
class Wrapped2
: boost::operators<Wrapped2<T, U> >
, boost::operators2<Wrapped2<T, U>, U>
, boost::shiftable1<Wrapped2<T, U>
, boost::shiftable2<Wrapped2<T, U>, U > >
{
public:
explicit Wrapped2( T v = T() ) : _value(v) {}
@ -97,6 +117,10 @@ namespace
{ _value &= x._value; return *this; }
Wrapped2& operator^=(const Wrapped2& x)
{ _value ^= x._value; return *this; }
Wrapped2& operator<<=(const Wrapped2& x)
{ _value <<= x._value; return *this; }
Wrapped2& operator>>=(const Wrapped2& x)
{ _value >>= x._value; return *this; }
Wrapped2& operator++() { ++_value; return *this; }
Wrapped2& operator--() { --_value; return *this; }
@ -111,6 +135,8 @@ namespace
Wrapped2& operator|=(U u) { _value |= u; return *this; }
Wrapped2& operator&=(U u) { _value &= u; return *this; }
Wrapped2& operator^=(U u) { _value ^= u; return *this; }
Wrapped2& operator<<=(U u) { _value <<= u; return *this; }
Wrapped2& operator>>=(U u) { _value >>= u; return *this; }
private:
T _value;
@ -118,203 +144,383 @@ namespace
template <class T, class U>
T true_value(Wrapped2<T,U> x) { return x.value(); }
template <class T>
class Wrapped3
: boost::equivalent<Wrapped3<T> >
, boost::partially_ordered<Wrapped3<T> >
, boost::equality_comparable<Wrapped3<T> >
{
public:
explicit Wrapped3( T v = T() ) : _value(v) {}
T value() const { return _value; }
bool operator<(const Wrapped3& x) const { return _value < x._value; }
private:
T _value;
};
template <class T>
T true_value(Wrapped3<T> x) { return x.value(); }
template <class T, class U>
class Wrapped4
: boost::equality_comparable1<Wrapped4<T, U>
, boost::equivalent1<Wrapped4<T, U>
, boost::partially_ordered1<Wrapped4<T, U> > > >
, boost::partially_ordered2<Wrapped4<T, U>, U
, boost::equivalent2<Wrapped4<T, U>, U
, boost::equality_comparable2<Wrapped4<T, U>, U> > >
{
public:
explicit Wrapped4( T v = T() ) : _value(v) {}
T value() const { return _value; }
bool operator<(const Wrapped4& x) const { return _value < x._value; }
bool operator<(U u) const { return _value < u; }
bool operator>(U u) const { return _value > u; }
private:
T _value;
};
template <class T, class U>
T true_value(Wrapped4<T,U> x) { return x.value(); }
// U must be convertible to T
template <class T, class U>
class Wrapped5
: boost::ordered_field_operators2<Wrapped5<T, U>, U>
, boost::ordered_field_operators1<Wrapped5<T, U> >
{
public:
explicit Wrapped5( T v = T() ) : _value(v) {}
// Conversion from U to Wrapped5<T,U>
Wrapped5(U u) : _value(u) {}
T value() const { return _value; }
bool operator<(const Wrapped5& x) const { return _value < x._value; }
bool operator<(U u) const { return _value < u; }
bool operator>(U u) const { return _value > u; }
bool operator==(const Wrapped5& u) const { return _value == u._value; }
bool operator==(U u) const { return _value == u; }
Wrapped5& operator/=(const Wrapped5& u) { _value /= u._value; return *this;}
Wrapped5& operator/=(U u) { _value /= u; return *this;}
Wrapped5& operator*=(const Wrapped5& u) { _value *= u._value; return *this;}
Wrapped5& operator*=(U u) { _value *= u; return *this;}
Wrapped5& operator-=(const Wrapped5& u) { _value -= u._value; return *this;}
Wrapped5& operator-=(U u) { _value -= u; return *this;}
Wrapped5& operator+=(const Wrapped5& u) { _value += u._value; return *this;}
Wrapped5& operator+=(U u) { _value += u; return *this;}
private:
T _value;
};
template <class T, class U>
T true_value(Wrapped5<T,U> x) { return x.value(); }
// U must be convertible to T
template <class T, class U>
class Wrapped6
: boost::ordered_euclidian_ring_operators2<Wrapped6<T, U>, U>
, boost::ordered_euclidian_ring_operators1<Wrapped6<T, U> >
{
public:
explicit Wrapped6( T v = T() ) : _value(v) {}
// Conversion from U to Wrapped6<T,U>
Wrapped6(U u) : _value(u) {}
T value() const { return _value; }
bool operator<(const Wrapped6& x) const { return _value < x._value; }
bool operator<(U u) const { return _value < u; }
bool operator>(U u) const { return _value > u; }
bool operator==(const Wrapped6& u) const { return _value == u._value; }
bool operator==(U u) const { return _value == u; }
Wrapped6& operator%=(const Wrapped6& u) { _value %= u._value; return *this;}
Wrapped6& operator%=(U u) { _value %= u; return *this;}
Wrapped6& operator/=(const Wrapped6& u) { _value /= u._value; return *this;}
Wrapped6& operator/=(U u) { _value /= u; return *this;}
Wrapped6& operator*=(const Wrapped6& u) { _value *= u._value; return *this;}
Wrapped6& operator*=(U u) { _value *= u; return *this;}
Wrapped6& operator-=(const Wrapped6& u) { _value -= u._value; return *this;}
Wrapped6& operator-=(U u) { _value -= u; return *this;}
Wrapped6& operator+=(const Wrapped6& u) { _value += u._value; return *this;}
Wrapped6& operator+=(U u) { _value += u; return *this;}
private:
T _value;
};
template <class T, class U>
T true_value(Wrapped6<T,U> x) { return x.value(); }
// MyInt uses only the single template-argument form of all_operators<>
typedef Wrapped1<int> MyInt;
typedef Wrapped2<long, long> MyLong;
typedef Wrapped3<signed char> MyChar;
typedef Wrapped4<short, short> MyShort;
typedef Wrapped5<double, int> MyDoubleInt;
typedef Wrapped6<long, int> MyLongInt;
template <class X1, class Y1, class X2, class Y2>
void sanity_check(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
assert(true_value(y1) == true_value(y2));
assert(true_value(x1) == true_value(x2));
BOOST_TEST( true_value(y1) == true_value(y2) );
BOOST_TEST( true_value(x1) == true_value(x2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_less_than_comparable_aux(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
assert((x1 < y1) == (x2 < y2));
assert((x1 <= y1) == (x2 <= y2));
assert((x1 >= y1) == (x2 >= y2));
assert((x1 > y1) == (x2 > y2));
BOOST_TEST( (x1 < y1) == (x2 < y2) );
BOOST_TEST( (x1 <= y1) == (x2 <= y2) );
BOOST_TEST( (x1 >= y1) == (x2 >= y2) );
BOOST_TEST( (x1 > y1) == (x2 > y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_less_than_comparable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
test_less_than_comparable_aux(x1, y1, x2, y2);
test_less_than_comparable_aux(y1, x1, y2, x2);
sanity_check( x1, y1, x2, y2 );
test_less_than_comparable_aux( x1, y1, x2, y2 );
test_less_than_comparable_aux( y1, x1, y2, x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_equality_comparable_aux(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
assert((x1 == y1) == (x2 == y2));
assert((x1 != y1) == (x2 != y2));
BOOST_TEST( (x1 == y1) == (x2 == y2) );
BOOST_TEST( (x1 != y1) == (x2 != y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_equality_comparable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
test_equality_comparable_aux(x1, y1, x2, y2);
test_equality_comparable_aux(y1, x1, y2, x2);
sanity_check( x1, y1, x2, y2 );
test_equality_comparable_aux( x1, y1, x2, y2 );
test_equality_comparable_aux( y1, x1, y2, x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_multipliable_aux(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
assert((x1 * y1).value() == (x2 * y2));
BOOST_TEST( (x1 * y1).value() == (x2 * y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_multipliable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
test_multipliable_aux(x1, y1, x2, y2);
test_multipliable_aux(y1, x1, y2, x2);
sanity_check( x1, y1, x2, y2 );
test_multipliable_aux( x1, y1, x2, y2 );
test_multipliable_aux( y1, x1, y2, x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_addable_aux(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
assert((x1 + y1).value() == (x2 + y2));
BOOST_TEST( (x1 + y1).value() == (x2 + y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_addable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
test_addable_aux(x1, y1, x2, y2);
test_addable_aux(y1, x1, y2, x2);
sanity_check( x1, y1, x2, y2 );
test_addable_aux( x1, y1, x2, y2 );
test_addable_aux( y1, x1, y2, x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_subtractable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
assert((x1 - y1).value() == x2 - y2);
sanity_check( x1, y1, x2, y2 );
BOOST_TEST( (x1 - y1).value() == (x2 - y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_subtractable_left(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check( x1, y1, x2, y2 );
BOOST_TEST( (y1 - x1).value() == (y2 - x2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_dividable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
if (y2 != 0)
assert((x1 / y1).value() == x2 / y2);
sanity_check( x1, y1, x2, y2 );
if ( y2 != 0 )
BOOST_TEST( (x1 / y1).value() == (x2 / y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_dividable_left(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check( x1, y1, x2, y2 );
if ( x2 != 0 )
BOOST_TEST( (y1 / x1).value() == (y2 / x2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_modable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
if (y2 != 0)
assert((x1 / y1).value() == x2 / y2);
sanity_check( x1, y1, x2, y2 );
if ( y2 != 0 )
BOOST_TEST( (x1 % y1).value() == (x2 % y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_modable_left(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check( x1, y1, x2, y2 );
if ( x2 != 0 )
BOOST_TEST( (y1 % x1).value() == (y2 % x2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_xorable_aux(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
assert((x1 ^ y1).value() == (x2 ^ y2));
BOOST_TEST( (x1 ^ y1).value() == (x2 ^ y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_xorable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
test_xorable_aux(x1, y1, x2, y2);
test_xorable_aux(y1, x1, y2, x2);
sanity_check( x1, y1, x2, y2 );
test_xorable_aux( x1, y1, x2, y2 );
test_xorable_aux( y1, x1, y2, x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_andable_aux(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
assert((x1 & y1).value() == (x2 & y2));
BOOST_TEST( (x1 & y1).value() == (x2 & y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_andable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
test_andable_aux(x1, y1, x2, y2);
test_andable_aux(y1, x1, y2, x2);
sanity_check( x1, y1, x2, y2 );
test_andable_aux( x1, y1, x2, y2 );
test_andable_aux( y1, x1, y2, x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_orable_aux(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
assert((x1 | y1).value() == (x2 | y2));
BOOST_TEST( (x1 | y1).value() == (x2 | y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_orable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check(x1, y1, x2, y2);
test_orable_aux(x1, y1, x2, y2);
test_orable_aux(y1, x1, y2, x2);
sanity_check( x1, y1, x2, y2 );
test_orable_aux( x1, y1, x2, y2 );
test_orable_aux( y1, x1, y2, x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_left_shiftable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check( x1, y1, x2, y2 );
BOOST_TEST( (x1 << y1).value() == (x2 << y2) );
}
template <class X1, class Y1, class X2, class Y2>
void test_right_shiftable(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
sanity_check( x1, y1, x2, y2 );
BOOST_TEST( (x1 >> y1).value() == (x2 >> y2) );
}
template <class X1, class X2>
void test_incrementable(X1 x1, X2 x2)
{
sanity_check(x1, x1, x2, x2);
assert(x1++.value() == x2++);
assert(x1.value() == x2);
sanity_check( x1, x1, x2, x2 );
BOOST_TEST( (x1++).value() == x2++ );
BOOST_TEST( x1.value() == x2 );
}
template <class X1, class X2>
void test_decrementable(X1 x1, X2 x2)
{
sanity_check(x1, x1, x2, x2);
assert(x1--.value() == x2--);
assert(x1.value() == x2);
sanity_check( x1, x1, x2, x2 );
BOOST_TEST( (x1--).value() == x2-- );
BOOST_TEST( x1.value() == x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_all(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
test_less_than_comparable(x1, y1, x2, y2);
test_equality_comparable(x1, y1, x2, y2);
test_multipliable(x1, y1, x2, y2);
test_addable(x1, y1, x2, y2);
test_subtractable(x1, y1, x2, y2);
test_dividable(x1, y1, x2, y2);
test_modable(x1, y1, x2, y2);
test_xorable(x1, y1, x2, y2);
test_andable(x1, y1, x2, y2);
test_orable(x1, y1, x2, y2);
test_incrementable(x1, x2);
test_decrementable(x1, x2);
test_less_than_comparable( x1, y1, x2, y2 );
test_equality_comparable( x1, y1, x2, y2 );
test_multipliable( x1, y1, x2, y2 );
test_addable( x1, y1, x2, y2 );
test_subtractable( x1, y1, x2, y2 );
test_dividable( x1, y1, x2, y2 );
test_modable( x1, y1, x2, y2 );
test_xorable( x1, y1, x2, y2 );
test_andable( x1, y1, x2, y2 );
test_orable( x1, y1, x2, y2 );
test_left_shiftable( x1, y1, x2, y2 );
test_right_shiftable( x1, y1, x2, y2 );
test_incrementable( x1, x2 );
test_decrementable( x1, x2 );
}
template <class X1, class Y1, class X2, class Y2>
void test_left(X1 x1, Y1 y1, X2 x2, Y2 y2)
{
test_subtractable_left( x1, y1, x2, y2 );
test_dividable_left( x1, y1, x2, y2 );
test_modable_left( x1, y1, x2, y2 );
}
template <class Big, class Small>
struct tester
{
void operator()(boost::min_rand& randomizer) const
void operator()(boost::minstd_rand& randomizer) const
{
Big b1 = Big(randomizer());
Big b2 = Big(randomizer());
Small s = Small(randomizer());
Big b1 = Big( randomizer() );
Big b2 = Big( randomizer() );
Small s = Small( randomizer() );
test_all(Wrapped1<Big>(b1), Wrapped1<Big>(b2), b1, b2);
test_all(Wrapped2<Big, Small>(b1), s, b1, s);
test_all( Wrapped1<Big>(b1), Wrapped1<Big>(b2), b1, b2 );
test_all( Wrapped2<Big, Small>(b1), s, b1, s );
}
};
template <class Big, class Small>
struct tester_left
{
void operator()(boost::minstd_rand& randomizer) const
{
Big b1 = Big( randomizer() );
Small s = Small( randomizer() );
test_left( Wrapped6<Big, Small>(b1), s, b1, s );
}
};
// added as a regression test. We had a bug which this uncovered.
struct Point
: boost::addable<Point,
boost::subtractable<Point> >
: boost::addable<Point
, boost::subtractable<Point> >
{
Point( int h, int v ) : h(h), v(v) {}
Point() :h(0), v(0) {}
const Point& operator+=( const Point& rhs ) { h += rhs.h; v += rhs.v; return *this; }
const Point& operator-=( const Point& rhs ) { h -= rhs.h; v -= rhs.v; return *this; }
const Point& operator+=( const Point& rhs )
{ h += rhs.h; v += rhs.v; return *this; }
const Point& operator-=( const Point& rhs )
{ h -= rhs.h; v -= rhs.v; return *this; }
int h;
int v;
};
} // unnamed namespace
@ -338,22 +544,34 @@ template Wrapped2<unsigned int, unsigned char>;
template Wrapped2<unsigned long, unsigned int>;
template Wrapped2<unsigned long, unsigned char>;
template Wrapped2<unsigned long, unsigned long>;
template Wrapped6<long, int>;
template Wrapped6<long, signed char>;
template Wrapped6<int, signed char>;
template Wrapped6<unsigned long, unsigned int>;
template Wrapped6<unsigned long, unsigned char>;
template Wrapped6<unsigned int, unsigned char>;
#endif
#ifdef NDEBUG
#error This program is pointless when NDEBUG disables assert()!
#endif
#define PRIVATE_EXPR_TEST(e, t) BOOST_TEST( ((e), (t)) )
int main()
int
test_main( int , char * [] )
{
using std::cout;
using std::endl;
// Regression test.
Point x;
x = x + Point(3, 4);
x = x - Point(3, 4);
cout << "Created point, and operated on it." << endl;
for (int n = 0; n < 10000; ++n)
{
boost::min_rand r;
boost::minstd_rand r;
tester<long, int>()(r);
tester<long, signed char>()(r);
tester<long, long>()(r);
@ -365,117 +583,308 @@ int main()
tester<unsigned long, unsigned long>()(r);
tester<unsigned int, unsigned int>()(r);
tester<unsigned int, unsigned char>()(r);
tester_left<long, int>()(r);
tester_left<long, signed char>()(r);
tester_left<int, signed char>()(r);
tester_left<unsigned long, unsigned int>()(r);
tester_left<unsigned long, unsigned char>()(r);
tester_left<unsigned int, unsigned char>()(r);
}
cout << "Did random tester loop." << endl;
MyInt i1(1);
MyInt i2(2);
MyInt i;
assert( i1.value() == 1 );
assert( i2.value() == 2 );
assert( i.value() == 0 );
BOOST_TEST( i1.value() == 1 );
BOOST_TEST( i2.value() == 2 );
BOOST_TEST( i.value() == 0 );
i = i2;
assert( i.value() == 2 );
assert( i2 == i );
assert( i1 != i2 );
assert( i1 < i2 );
assert( i1 <= i2 );
assert( i <= i2 );
assert( i2 > i1 );
assert( i2 >= i1 );
assert( i2 >= i );
cout << "Created MyInt objects.\n";
i = i1 + i2; assert( i.value() == 3 );
i = i + i2; assert( i.value() == 5 );
i = i - i1; assert( i.value() == 4 );
i = i * i2; assert( i.value() == 8 );
i = i / i2; assert( i.value() == 4 );
i = i % (i - i1); assert( i.value() == 1 );
i = i2 + i2; assert( i.value() == 4 );
i = i1 | i2 | i; assert( i.value() == 7 );
i = i & i2; assert( i.value() == 2 );
i = i + i1; assert( i.value() == 3 );
i = i ^ i1; assert( i.value() == 2 );
i = (i+i1)*(i2|i1); assert( i.value() == 9 );
PRIVATE_EXPR_TEST( (i = i2), (i.value() == 2) );
BOOST_TEST( i2 == i );
BOOST_TEST( i1 != i2 );
BOOST_TEST( i1 < i2 );
BOOST_TEST( i1 <= i2 );
BOOST_TEST( i <= i2 );
BOOST_TEST( i2 > i1 );
BOOST_TEST( i2 >= i1 );
BOOST_TEST( i2 >= i );
PRIVATE_EXPR_TEST( (i = i1 + i2), (i.value() == 3) );
PRIVATE_EXPR_TEST( (i = i + i2), (i.value() == 5) );
PRIVATE_EXPR_TEST( (i = i - i1), (i.value() == 4) );
PRIVATE_EXPR_TEST( (i = i * i2), (i.value() == 8) );
PRIVATE_EXPR_TEST( (i = i / i2), (i.value() == 4) );
PRIVATE_EXPR_TEST( (i = i % ( i - i1 )), (i.value() == 1) );
PRIVATE_EXPR_TEST( (i = i2 + i2), (i.value() == 4) );
PRIVATE_EXPR_TEST( (i = i1 | i2 | i), (i.value() == 7) );
PRIVATE_EXPR_TEST( (i = i & i2), (i.value() == 2) );
PRIVATE_EXPR_TEST( (i = i + i1), (i.value() == 3) );
PRIVATE_EXPR_TEST( (i = i ^ i1), (i.value() == 2) );
PRIVATE_EXPR_TEST( (i = ( i + i1 ) * ( i2 | i1 )), (i.value() == 9) );
PRIVATE_EXPR_TEST( (i = i1 << i2), (i.value() == 4) );
PRIVATE_EXPR_TEST( (i = i2 >> i1), (i.value() == 1) );
cout << "Performed tests on MyInt objects.\n";
MyLong j1(1);
MyLong j2(2);
MyLong j;
assert( j1.value() == 1 );
assert( j2.value() == 2 );
assert( j.value() == 0 );
BOOST_TEST( j1.value() == 1 );
BOOST_TEST( j2.value() == 2 );
BOOST_TEST( j.value() == 0 );
j = j2;
assert( j.value() == 2 );
assert( j2 == j );
assert( 2 == j );
assert( j2 == 2 );
assert( j == j2 );
assert( j1 != j2 );
assert( j1 != 2 );
assert( 1 != j2 );
assert( j1 < j2 );
assert( 1 < j2 );
assert( j1 < 2 );
assert( j1 <= j2 );
assert( 1 <= j2 );
assert( j1 <= j );
assert( j <= j2 );
assert( 2 <= j2 );
assert( j <= 2 );
assert( j2 > j1 );
assert( 2 > j1 );
assert( j2 > 1 );
assert( j2 >= j1 );
assert( 2 >= j1 );
assert( j2 >= 1 );
assert( j2 >= j );
assert( 2 >= j );
assert( j2 >= 2 );
cout << "Created MyLong objects.\n";
assert( (j1 + 2) == 3 );
assert( (1 + j2) == 3 );
j = j1 + j2; assert( j.value() == 3 );
PRIVATE_EXPR_TEST( (j = j2), (j.value() == 2) );
assert( (j + 2) == 5 );
assert( (3 + j2) == 5 );
j = j + j2; assert( j.value() == 5 );
BOOST_TEST( j2 == j );
BOOST_TEST( 2 == j );
BOOST_TEST( j2 == 2 );
BOOST_TEST( j == j2 );
BOOST_TEST( j1 != j2 );
BOOST_TEST( j1 != 2 );
BOOST_TEST( 1 != j2 );
BOOST_TEST( j1 < j2 );
BOOST_TEST( 1 < j2 );
BOOST_TEST( j1 < 2 );
BOOST_TEST( j1 <= j2 );
BOOST_TEST( 1 <= j2 );
BOOST_TEST( j1 <= j );
BOOST_TEST( j <= j2 );
BOOST_TEST( 2 <= j2 );
BOOST_TEST( j <= 2 );
BOOST_TEST( j2 > j1 );
BOOST_TEST( 2 > j1 );
BOOST_TEST( j2 > 1 );
BOOST_TEST( j2 >= j1 );
BOOST_TEST( 2 >= j1 );
BOOST_TEST( j2 >= 1 );
BOOST_TEST( j2 >= j );
BOOST_TEST( 2 >= j );
BOOST_TEST( j2 >= 2 );
BOOST_TEST( (j1 + 2) == 3 );
BOOST_TEST( (1 + j2) == 3 );
PRIVATE_EXPR_TEST( (j = j1 + j2), (j.value() == 3) );
assert( (j - 1) == 4 );
j = j - j1; assert( j.value() == 4 );
BOOST_TEST( (j + 2) == 5 );
BOOST_TEST( (3 + j2) == 5 );
PRIVATE_EXPR_TEST( (j = j + j2), (j.value() == 5) );
assert( (j * 2) == 8 );
assert( (4 * j2) == 8 );
j = j * j2; assert( j.value() == 8 );
BOOST_TEST( (j - 1) == 4 );
PRIVATE_EXPR_TEST( (j = j - j1), (j.value() == 4) );
assert( (j / 2) == 4 );
j = j / j2; assert( j.value() == 4 );
BOOST_TEST( (j * 2) == 8 );
BOOST_TEST( (4 * j2) == 8 );
PRIVATE_EXPR_TEST( (j = j * j2), (j.value() == 8) );
assert( (j % 3) == 1 );
j = j % (j - j1); assert( j.value() == 1 );
BOOST_TEST( (j / 2) == 4 );
PRIVATE_EXPR_TEST( (j = j / j2), (j.value() == 4) );
j = j2 + j2; assert( j.value() == 4 );
BOOST_TEST( (j % 3) == 1 );
PRIVATE_EXPR_TEST( (j = j % ( j - j1 )), (j.value() == 1) );
assert( (1 | j2 | j) == 7 );
assert( (j1 | 2 | j) == 7 );
assert( (j1 | j2 | 4) == 7 );
j = j1 | j2 | j; assert( j.value() == 7 );
PRIVATE_EXPR_TEST( (j = j2 + j2), (j.value() == 4) );
assert( (7 & j2) == 2 );
assert( (j & 2) == 2 );
j = j & j2; assert( j.value() == 2 );
BOOST_TEST( (1 | j2 | j) == 7 );
BOOST_TEST( (j1 | 2 | j) == 7 );
BOOST_TEST( (j1 | j2 | 4) == 7 );
PRIVATE_EXPR_TEST( (j = j1 | j2 | j), (j.value() == 7) );
j = j | j1; assert( j.value() == 3 );
BOOST_TEST( (7 & j2) == 2 );
BOOST_TEST( (j & 2) == 2 );
PRIVATE_EXPR_TEST( (j = j & j2), (j.value() == 2) );
assert( (3 ^ j1) == 2 );
assert( (j ^ 1) == 2 );
j = j ^ j1; assert( j.value() == 2 );
PRIVATE_EXPR_TEST( (j = j | j1), (j.value() == 3) );
j = (j+j1)*(j2|j1); assert( j.value() == 9 );
BOOST_TEST( (3 ^ j1) == 2 );
BOOST_TEST( (j ^ 1) == 2 );
PRIVATE_EXPR_TEST( (j = j ^ j1), (j.value() == 2) );
std::cout << "0 errors detected\n";
return 0;
PRIVATE_EXPR_TEST( (j = ( j + j1 ) * ( j2 | j1 )), (j.value() == 9) );
BOOST_TEST( (j1 << 2) == 4 );
BOOST_TEST( (j2 << 1) == 4 );
PRIVATE_EXPR_TEST( (j = j1 << j2), (j.value() == 4) );
BOOST_TEST( (j >> 2) == 1 );
BOOST_TEST( (j2 >> 1) == 1 );
PRIVATE_EXPR_TEST( (j = j2 >> j1), (j.value() == 1) );
cout << "Performed tests on MyLong objects.\n";
MyChar k1(1);
MyChar k2(2);
MyChar k;
BOOST_TEST( k1.value() == 1 );
BOOST_TEST( k2.value() == 2 );
BOOST_TEST( k.value() == 0 );
cout << "Created MyChar objects.\n";
PRIVATE_EXPR_TEST( (k = k2), (k.value() == 2) );
BOOST_TEST( k2 == k );
BOOST_TEST( k1 != k2 );
BOOST_TEST( k1 < k2 );
BOOST_TEST( k1 <= k2 );
BOOST_TEST( k <= k2 );
BOOST_TEST( k2 > k1 );
BOOST_TEST( k2 >= k1 );
BOOST_TEST( k2 >= k );
cout << "Performed tests on MyChar objects.\n";
MyShort l1(1);
MyShort l2(2);
MyShort l;
BOOST_TEST( l1.value() == 1 );
BOOST_TEST( l2.value() == 2 );
BOOST_TEST( l.value() == 0 );
cout << "Created MyShort objects.\n";
PRIVATE_EXPR_TEST( (l = l2), (l.value() == 2) );
BOOST_TEST( l2 == l );
BOOST_TEST( 2 == l );
BOOST_TEST( l2 == 2 );
BOOST_TEST( l == l2 );
BOOST_TEST( l1 != l2 );
BOOST_TEST( l1 != 2 );
BOOST_TEST( 1 != l2 );
BOOST_TEST( l1 < l2 );
BOOST_TEST( 1 < l2 );
BOOST_TEST( l1 < 2 );
BOOST_TEST( l1 <= l2 );
BOOST_TEST( 1 <= l2 );
BOOST_TEST( l1 <= l );
BOOST_TEST( l <= l2 );
BOOST_TEST( 2 <= l2 );
BOOST_TEST( l <= 2 );
BOOST_TEST( l2 > l1 );
BOOST_TEST( 2 > l1 );
BOOST_TEST( l2 > 1 );
BOOST_TEST( l2 >= l1 );
BOOST_TEST( 2 >= l1 );
BOOST_TEST( l2 >= 1 );
BOOST_TEST( l2 >= l );
BOOST_TEST( 2 >= l );
BOOST_TEST( l2 >= 2 );
cout << "Performed tests on MyShort objects.\n";
MyDoubleInt di1(1);
MyDoubleInt di2(2.);
MyDoubleInt half(0.5);
MyDoubleInt di;
MyDoubleInt tmp;
BOOST_TEST( di1.value() == 1 );
BOOST_TEST( di2.value() == 2 );
BOOST_TEST( di2.value() == 2 );
BOOST_TEST( di.value() == 0 );
cout << "Created MyDoubleInt objects.\n";
PRIVATE_EXPR_TEST( (di = di2), (di.value() == 2) );
BOOST_TEST( di2 == di );
BOOST_TEST( 2 == di );
BOOST_TEST( di == 2 );
BOOST_TEST( di1 < di2 );
BOOST_TEST( 1 < di2 );
BOOST_TEST( di1 <= di2 );
BOOST_TEST( 1 <= di2 );
BOOST_TEST( di2 > di1 );
BOOST_TEST( di2 > 1 );
BOOST_TEST( di2 >= di1 );
BOOST_TEST( di2 >= 1 );
BOOST_TEST( di1 / di2 == half );
BOOST_TEST( di1 / 2 == half );
BOOST_TEST( 1 / di2 == half );
PRIVATE_EXPR_TEST( (tmp=di1), ((tmp/=2) == half) );
PRIVATE_EXPR_TEST( (tmp=di1), ((tmp/=di2) == half) );
BOOST_TEST( di1 * di2 == di2 );
BOOST_TEST( di1 * 2 == di2 );
BOOST_TEST( 1 * di2 == di2 );
PRIVATE_EXPR_TEST( (tmp=di1), ((tmp*=2) == di2) );
PRIVATE_EXPR_TEST( (tmp=di1), ((tmp*=di2) == di2) );
BOOST_TEST( di2 - di1 == di1 );
BOOST_TEST( di2 - 1 == di1 );
BOOST_TEST( 2 - di1 == di1 );
PRIVATE_EXPR_TEST( (tmp=di2), ((tmp-=1) == di1) );
PRIVATE_EXPR_TEST( (tmp=di2), ((tmp-=di1) == di1) );
BOOST_TEST( di1 + di1 == di2 );
BOOST_TEST( di1 + 1 == di2 );
BOOST_TEST( 1 + di1 == di2 );
PRIVATE_EXPR_TEST( (tmp=di1), ((tmp+=1) == di2) );
PRIVATE_EXPR_TEST( (tmp=di1), ((tmp+=di1) == di2) );
cout << "Performed tests on MyDoubleInt objects.\n";
MyLongInt li1(1);
MyLongInt li2(2);
MyLongInt li;
MyLongInt tmp2;
BOOST_TEST( li1.value() == 1 );
BOOST_TEST( li2.value() == 2 );
BOOST_TEST( li.value() == 0 );
cout << "Created MyLongInt objects.\n";
PRIVATE_EXPR_TEST( (li = li2), (li.value() == 2) );
BOOST_TEST( li2 == li );
BOOST_TEST( 2 == li );
BOOST_TEST( li == 2 );
BOOST_TEST( li1 < li2 );
BOOST_TEST( 1 < li2 );
BOOST_TEST( li1 <= li2 );
BOOST_TEST( 1 <= li2 );
BOOST_TEST( li2 > li1 );
BOOST_TEST( li2 > 1 );
BOOST_TEST( li2 >= li1 );
BOOST_TEST( li2 >= 1 );
BOOST_TEST( li1 % li2 == li1 );
BOOST_TEST( li1 % 2 == li1 );
BOOST_TEST( 1 % li2 == li1 );
PRIVATE_EXPR_TEST( (tmp2=li1), ((tmp2%=2) == li1) );
PRIVATE_EXPR_TEST( (tmp2=li1), ((tmp2%=li2) == li1) );
BOOST_TEST( li1 / li2 == 0 );
BOOST_TEST( li1 / 2 == 0 );
BOOST_TEST( 1 / li2 == 0 );
PRIVATE_EXPR_TEST( (tmp2=li1), ((tmp2/=2) == 0) );
PRIVATE_EXPR_TEST( (tmp2=li1), ((tmp2/=li2) == 0) );
BOOST_TEST( li1 * li2 == li2 );
BOOST_TEST( li1 * 2 == li2 );
BOOST_TEST( 1 * li2 == li2 );
PRIVATE_EXPR_TEST( (tmp2=li1), ((tmp2*=2) == li2) );
PRIVATE_EXPR_TEST( (tmp2=li1), ((tmp2*=li2) == li2) );
BOOST_TEST( li2 - li1 == li1 );
BOOST_TEST( li2 - 1 == li1 );
BOOST_TEST( 2 - li1 == li1 );
PRIVATE_EXPR_TEST( (tmp2=li2), ((tmp2-=1) == li1) );
PRIVATE_EXPR_TEST( (tmp2=li2), ((tmp2-=li1) == li1) );
BOOST_TEST( li1 + li1 == li2 );
BOOST_TEST( li1 + 1 == li2 );
BOOST_TEST( 1 + li1 == li2 );
PRIVATE_EXPR_TEST( (tmp2=li1), ((tmp2+=1) == li2) );
PRIVATE_EXPR_TEST( (tmp2=li1), ((tmp2+=li1) == li2) );
cout << "Performed tests on MyLongInt objects.\n";
return boost::exit_success;
}

177
permutation_iterator.htm Normal file
View File

@ -0,0 +1,177 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<title>Permutation Iterator Adaptor Documentation</title>
</head>
<body bgcolor="#FFFFFF" text="#000000">
<h1>Permutation Iterator Adaptor</h1>
<p>Defined in header <a href="../../boost/permutation_iterator.hpp">boost/permutation_iterator.hpp</a></p>
<p>The permutation iterator adaptor provides an iterator to a permutation of a given range.
(<a href="http://www.cut-the-knot.com/do_you_know/permutation.html">see definition of permutation</a>).
The adaptor takes two arguments
<ul>
<li>an iterator to the range V on which the <a href="http://www.cut-the-knot.com/do_you_know/permutation.html">permutation</a> will be applied</li>
<li>the reindexing scheme that defines how the elements of V will be permuted.</li>
</ul>
<p>Note that the permutation iterator is not limited to strict permutations of the given range V.
The distance between begin and end of the reindexing iterators is allowed to be smaller compared to the
size of the range V, in which case the permutation iterator only provides a permutation of a subrange of V.
The indexes neither need to be unique. In this same context, it must be noted that the past the end permutation iterator is
completely defined by means of the past-the-end iterator to the indices</p>
<h2>Synopsis</h2>
<blockquote>
<pre>
namespace boost {
template &lt;class IndexIterator&gt;
class permutation_iterator_policies;
template &lt;class ElementIterator, class IndexIterator&gt;
class permutation_iterator_generator;
template &lt;class ElementIterator, class IndexIterator&gt;
typename permutation_iterator_generator&lt;ElementIterator, IndexIterator&gt;::type
make_permutation_iterator(ElementIterator&amp; base, IndexIterator&amp; indexing);
}
</pre>
</blockquote>
<h2>The Permutation Iterator Generator Class Template</h2>
<p>The <code>permutation_iterator_generator</code> is a helper class whose purpose
is to construct a permutation iterator <strong>type</strong>. This class has
two template arguments, the first being the iterator type over the range V, the
second being the type of the iterator over the indices.
<blockquote>
<pre>
template &lt;class ElementIterator, class IndexIterator&gt;
class permutation_iterator_generator
{
public:
typedef <a href="iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt...&gt; type; // the resulting permutation iterator type
}
</pre>
</blockquote>
<h3>Template Parameters</h3>
<table border>
<tr>
<th>Parameter</th>
<th>Description</th>
</tr>
<tr>
<td><tt>ElementIterator</tt></td>
<td>The iterator over the elements to be permuted. This type must be a model
of <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">RandomAccessIterator</a></td>
</td>
<tr>
<td><tt>IndexIterator</tt></td>
<td>The iterator over the new indexing scheme. This type must at least be a model
of <a href="http://www.sgi.com/tech/stl/ForwardIterator.html">ForwardIterator</a>.
The <code>IndexIterator::value_type</code> must be convertible to the
<code>ElementIterator::difference_type</code>.</td>
</table>
<h3>Concept Model</h3>
The permutation iterator is always a model of the same concept as the IndexIterator.
<h3>Members</h3>
The permutation iterator implements the member functions
and operators required for the
<a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>
concept. However, the permutation iterator can only meet the complexity guarantees
of the same concept as the IndexIterator. Thus for instance, although the permutation
iterator provides <code>operator+=(distance)</code>, this operation will take linear time
in case the IndexIterator is a model of ForwardIterator instead of amortized constant time.
<br>
<h2><a name="make_generator_iterator">The Permutation Iterator Object Generator</a></h2>
The <code>make_permutation_iterator()</code> function provides a
convenient way to create permutation iterator objects. The function
saves the user the trouble of explicitly writing out the iterator
types.
<blockquote>
<pre>
template &lt;class ElementIterator, class IndexIterator &gt;
typename permutation_iterator_generator&lt;ElementIterator, IndexIterator&gt;::type
make_permutation_iterator(ElementIterator&amp; base, IndexIterator&amp; indices);
</pre>
</blockquote>
<h2>Example</h2>
<blockquote>
<pre>
using namespace boost;
int i = 0;
typedef std::vector< int > element_range_type;
typedef std::list< int > index_type;
static const int element_range_size = 10;
static const int index_size = 4;
element_range_type elements( element_range_size );
for(element_range_type::iterator el_it = elements.begin() ; el_it != elements.end() ; ++el_it) *el_it = std::distance(elements.begin(), el_it);
index_type indices( index_size );
for(index_type::iterator i_it = indices.begin() ; i_it != indices.end() ; ++i_it ) *i_it = element_range_size - index_size + std::distance(indices.begin(), i_it);
std::reverse( indices.begin(), indices.end() );
typedef permutation_iterator_generator< element_range_type::iterator, index_type::iterator >::type permutation_type;
permutation_type begin = make_permutation_iterator( elements.begin(), indices.begin() );
permutation_type it = begin;
permutation_type end = make_permutation_iterator( elements.begin(), indices.end() );
std::cout << "The original range is : ";
std::copy( elements.begin(), elements.end(), std::ostream_iterator< int >( std::cout, " " ) );
std::cout << "\n";
std::cout << "The reindexing scheme is : ";
std::copy( indices.begin(), indices.end(), std::ostream_iterator< int >( std::cout, " " ) );
std::cout << "\n";
std::cout << "The permutated range is : ";
std::copy( begin, end, std::ostream_iterator< int >( std::cout, " " ) );
std::cout << "\n";
std::cout << "Elements at even indices in the permutation : ";
it = begin;
for(i = 0; i < index_size / 2 ; ++i, it+=2 ) std::cout << *it << " ";
std::cout << "\n";
std::cout << "Permutation backwards : ";
it = begin + (index_size);
assert( it != begin );
for( ; it-- != begin ; ) std::cout << *it << " ";
std::cout << "\n";
std::cout << "Iterate backward with stride 2 : ";
it = begin + (index_size - 1);
for(i = 0 ; i < index_size / 2 ; ++i, it-=2 ) std::cout << *it << " ";
std::cout << "\n";
</pre>
</blockquote>
<br><br><br><hr>
Thanks: The permutation iterator is only a small addition to the superb iterator adaptors
library of David Abrahams and Jeremy Siek.
<br><br>
Copyright 2001 Toon Knapen.
</body>
</html>

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<h1>Projection Iterator Adaptor</h1>
Defined in header
<a href="../../boost/iterator_adaptors.hpp">boost/iterator_adaptors.hpp</a>
<p>
The projection iterator adaptor is similar to the <a
href="./transform_iterator.htm">transform iterator adaptor</a> in that
its <tt>operator*()</tt> applies some function to the result of
dereferencing the base iterator and then returns the result. The
difference is that the function must return a reference to some
existing object (for example, a data member within the
<tt>value_type</tt> of the base iterator). The following
<b>pseudo-code</b> gives the basic idea. The data member <tt>p</tt> is
the function object.
<pre>
reference projection_iterator::operator*() const {
return this->p(*this->base_iterator);
}
</pre>
<h2>Synopsis</h2>
<pre>
namespace boost {
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class BaseIterator&gt;
struct projection_iterator_generator;
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>,
class BaseIterator, class ConstBaseIterator&gt;
struct projection_iterator_pair_generator;
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class BaseIterator&gt;
typename projection_iterator_generator&lt;AdaptableUnaryFunction, BaseIterator&gt;::type
make_projection_iterator(BaseIterator base,
const AdaptableUnaryFunction& p = AdaptableUnaryFunction())
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class ConstBaseIterator&gt;
typename projection_iterator_generator&lt;AdaptableUnaryFunction, ConstBaseIterator&gt;::type
make_const_projection_iterator(ConstBaseIterator base,
const AdaptableUnaryFunction& p = AdaptableUnaryFunction())
}
</pre>
<hr>
<h2><a name="projection_iterator_generator">The Projection Iterator Type
Generator</a></h2>
The class <tt>projection_iterator_generator</tt> is a helper class
whose purpose is to construct an projection iterator type. The main
template parameter for this class is the <a
href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html"><tt>AdaptableUnaryFunction</tt></a>
function object type and the <tt>BaseIterator</tt> type that is being
wrapped.
<pre>
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class BaseIterator&gt;
class projection_iterator_generator
{
public:
typedef <tt><a href="./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt...&gt;</tt> type; // the resulting projection iterator type
};
</pre>
<h3>Example</h3>
In the following example we have a list of personnel records. Each
record has an employee's name and ID number. We want to be able to
traverse through the list accessing either the name or the ID numbers
of the employees using the projection iterator so we create the
function object classes <tt>select_name</tt> and
<tt>select_ID</tt>. We then use the
<tt>projection_iterator_generator</tt> class to create a projection
iterator and use it to print out the names of the employees.
<pre>
#include &lt;boost/config.hpp&gt;
#include &lt;list&gt;
#include &lt;iostream&gt;
#include &lt;iterator&gt;
#include &lt;algorithm&gt;
#include &lt;string&gt;
#include &lt;boost/iterator_adaptors.hpp&gt;
struct personnel_record {
personnel_record(std::string n, int id) : m_name(n), m_ID(id) { }
std::string m_name;
int m_ID;
};
struct select_name {
typedef personnel_record argument_type;
typedef std::string result_type;
const std::string&amp; operator()(const personnel_record&amp; r) const {
return r.m_name;
}
std::string&amp; operator()(personnel_record&amp; r) const {
return r.m_name;
}
};
struct select_ID {
typedef personnel_record argument_type;
typedef int result_type;
const int&amp; operator()(const personnel_record&amp; r) const {
return r.m_ID;
}
int&amp; operator()(personnel_record&amp; r) const {
return r.m_ID;
}
};
int main(int, char*[])
{
std::list&lt;personnel_record&gt; personnel_list;
personnel_list.push_back(personnel_record("Barney", 13423));
personnel_list.push_back(personnel_record("Fred", 12343));
personnel_list.push_back(personnel_record("Wilma", 62454));
personnel_list.push_back(personnel_record("Betty", 20490));
// Example of using projection_iterator_generator
// to print out the names in the personnel list.
boost::projection_iterator_generator&lt;select_name,
std::list&lt;personnel_record&gt;::iterator&gt;::type
personnel_first(personnel_list.begin()),
personnel_last(personnel_list.end());
std::copy(personnel_first, personnel_last,
std::ostream_iterator&lt;std::string&gt;(std::cout, "\n"));
std::cout &lt;&lt; std::endl;
// to be continued...
</pre>
The output for this part is:
<pre>
Barney
Fred
Wilma
Betty
</pre>
<h3>Template Parameters</h3>
<Table border>
<TR>
<TH>Parameter</TH><TH>Description</TH>
</TR>
<TR>
<TD><a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html"><tt>AdaptableUnaryFunction</tt></a></TD>
<TD>The type of the function object. The <tt>argument_type</tt> of the
function must match the value type of the base iterator. The function
should return a reference to the function's <tt>result_type</tt>.
The <tt>result_type</tt> will be the resulting iterator's <tt>value_type</tt>.
</TD>
</TD>
<TR>
<TD><tt>BaseIterator</tt></TD>
<TD>The iterator type being wrapped.</TD>
</TD>
</TR>
</Table>
<h3>Model of</h3>
If the base iterator is a model of <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a> then so is the resulting projection iterator. If
the base iterator supports less functionality than this the resulting
projection iterator will also support less functionality.
<h3>Members</h3>
The projection iterator type implements the member functions and
operators required of the <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a> concept.
In addition it has the following constructor:
<pre>
projection_iterator_generator::type(const BaseIterator&amp; it,
const AdaptableUnaryFunction&amp; p = AdaptableUnaryFunction())
</pre>
<p>
<hr>
<p>
<h2><a name="projection_iterator_pair_generator">The Projection Iterator Pair
Generator</a></h2>
Sometimes a mutable/const pair of iterator types is needed, such as
when implementing a container type. The
<tt>projection_iterator_pair_generator</tt> class makes it more
convenient to create this pair of iterator types.
<pre>
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class BaseIterator, class ConstBaseIterator&gt;
class projection_iterator_pair_generator
{
public:
typedef <tt><a href="./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt...&gt;</tt> iterator; // the mutable projection iterator type
typedef <tt><a href="./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt...&gt;</tt> const_iterator; // the immutable projection iterator type
};
</pre>
<h3>Example</h3>
In this part of the example we use the
<tt>projection_iterator_pair_generator</tt> to create a mutable/const
pair of projection iterators that access the ID numbers of the
personnel. We use the mutable iterator to re-index the ID numbers from
zero. We then use the constant iterator to print the ID numbers out.
<pre>
// continuing from the last example...
typedef boost::projection_iterator_pair_generator&lt;select_ID,
std::list&lt;personnel_record&gt;::iterator,
std::list&lt;personnel_record&gt;::const_iterator&gt; PairGen;
PairGen::iterator ID_first(personnel_list.begin()),
ID_last(personnel_list.end());
int new_id = 0;
while (ID_first != ID_last) {
*ID_first = new_id++;
++ID_first;
}
PairGen::const_iterator const_ID_first(personnel_list.begin()),
const_ID_last(personnel_list.end());
std::copy(const_ID_first, const_ID_last,
std::ostream_iterator&lt;int&gt;(std::cout, " "));
std::cout &lt;&lt; std::endl;
std::cout &lt;&lt; std::endl;
// to be continued...
</pre&gt;
The output is:
<pre>
0 1 2 3
</pre>
<h3>Template Parameters</h3>
<Table border>
<TR>
<TH>Parameter</TH><TH>Description</TH>
</TR>
<TR>
<TD><a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html"><tt>AdaptableUnaryFunction</tt></a></TD>
<TD>The type of the function object. The <tt>argument_type</tt> of the
function must match the value type of the base iterator. The function
should return a true reference to the function's <tt>result_type</tt>.
The <tt>result_type</tt> will be the resulting iterator's <tt>value_type</tt>.
</TD>
</TD>
<TR>
<TD><tt>BaseIterator</tt></TD>
<TD>The mutable iterator type being wrapped.</TD>
</TD>
</TR>
<TR>
<TD><tt>ConstBaseIterator</tt></TD>
<TD>The constant iterator type being wrapped.</TD>
</TD>
</TR>
</Table>
<h3>Model of</h3>
If the base iterator types model the <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a> then so do the resulting projection iterator
types. If the base iterators support less functionality the
resulting projection iterator types will also support less
functionality. The resulting <tt>iterator</tt> type is mutable, and
the resulting <tt>const_iterator</tt> type is constant.
<h3>Members</h3>
The resulting <tt>iterator</tt> and <tt>const_iterator</tt> types
implements the member functions and operators required of the <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random
Access Iterator</a> concept. In addition they support the following
constructors:
<pre>
projection_iterator_pair_generator::iterator(const BaseIterator&amp; it,
const AdaptableUnaryFunction&amp; p = AdaptableUnaryFunction())</pre>
<pre>
projection_iterator_pair_generator::const_iterator(const BaseIterator&amp; it,
const AdaptableUnaryFunction&amp; p = AdaptableUnaryFunction())
</pre>
<p>
<hr>
<p>
<h2><a name="make_projection_iterator">The Projection Iterator Object Generators</a></h2>
The <tt>make_projection_iterator()</tt> and
<tt>make_const_projection_iterator()</tt> functions provide a more
convenient way to create projection iterator objects. The functions
save the user the trouble of explicitly writing out the iterator
types.
<pre>
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class BaseIterator&gt;
typename projection_iterator_generator&lt;AdaptableUnaryFunction, BaseIterator&gt;::type
make_projection_iterator(BaseIterator base,
const AdaptableUnaryFunction& p = AdaptableUnaryFunction())
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class ConstBaseIterator&gt;
typename projection_iterator_generator&lt;AdaptableUnaryFunction, ConstBaseIterator&gt;::type
make_const_projection_iterator(ConstBaseIterator base,
const AdaptableUnaryFunction& p = AdaptableUnaryFunction())
</pre>
<h3>Example</h3>
In this part of the example, we again print out the names of the
personnel, but this time we use the
<tt>make_const_projection_iterator()</tt> function to save some typing.
<pre>
// continuing from the last example...
std::copy
(boost::make_const_projection_iterator&lt;select_name&gt;(personnel_list.begin()),
boost::make_const_projection_iterator&lt;select_name&gt;(personnel_list.end()),
std::ostream_iterator<std::string>(std::cout, "\n"));
return 0;
}
</pre>
The output is:
<pre>
Barney
Fred
Wilma
Betty
</pre>
<hr>
<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan -->19 Aug 2001<!--webbot bot="Timestamp" endspan i-checksum="14767" --></p>
<p><EFBFBD> Copyright Jeremy Siek 2000. Permission to copy, use,
modify, sell and distribute this document is granted provided this copyright
notice appears in all copies. This document is provided &quot;as is&quot;
without express or implied warranty, and with no claim as to its suitability for
any purpose.</p>
</body>
</html>
<!-- LocalWords: html charset alt gif hpp BaseIterator const namespace struct
-->
<!-- LocalWords: ConstPointer ConstReference typename iostream int abcdefg
-->
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// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
#include <boost/config.hpp>
#include <list>
#include <iostream>
#include <iterator>
#include <algorithm>
#include <string>
#include <boost/iterator_adaptors.hpp>
struct personnel_record {
personnel_record(std::string n, int id) : m_name(n), m_ID(id) { }
std::string m_name;
int m_ID;
};
struct select_name {
typedef personnel_record argument_type;
typedef std::string result_type;
const std::string& operator()(const personnel_record& r) const {
return r.m_name;
}
std::string& operator()(personnel_record& r) const {
return r.m_name;
}
};
struct select_ID {
typedef personnel_record argument_type;
typedef int result_type;
const int& operator()(const personnel_record& r) const {
return r.m_ID;
}
int& operator()(personnel_record& r) const {
return r.m_ID;
}
};
int main(int, char*[])
{
std::list<personnel_record> personnel_list;
personnel_list.push_back(personnel_record("Barney", 13423));
personnel_list.push_back(personnel_record("Fred", 12343));
personnel_list.push_back(personnel_record("Wilma", 62454));
personnel_list.push_back(personnel_record("Betty", 20490));
// Example of using projection_iterator_generator
// to print out the names in the personnel list.
boost::projection_iterator_generator<select_name,
std::list<personnel_record>::iterator>::type
personnel_first(personnel_list.begin()),
personnel_last(personnel_list.end());
std::copy(personnel_first, personnel_last,
std::ostream_iterator<std::string>(std::cout, "\n"));
std::cout << std::endl;
// Example of using projection_iterator_pair_generator
// to assign new ID numbers to the personnel.
typedef boost::projection_iterator_pair_generator<select_ID,
std::list<personnel_record>::iterator,
std::list<personnel_record>::const_iterator> PairGen;
PairGen::iterator ID_first(personnel_list.begin()),
ID_last(personnel_list.end());
int new_id = 0;
while (ID_first != ID_last) {
*ID_first = new_id++;
++ID_first;
}
PairGen::const_iterator const_ID_first(personnel_list.begin()),
const_ID_last(personnel_list.end());
std::copy(const_ID_first, const_ID_last,
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
std::cout << std::endl;
// Example of using make_const_projection_iterator()
// to print out the names in the personnel list again.
std::copy
(boost::make_const_projection_iterator<select_name>(personnel_list.begin()),
boost::make_const_projection_iterator<select_name>(personnel_list.end()),
std::ostream_iterator<std::string>(std::cout, "\n"));
return 0;
}

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// compile-time test for "boost/ref.hpp" header content
// see 'ref_test.cpp' for run-time part
#include <boost/ref.hpp>
#include <boost/type_traits/same_traits.hpp>
#include <boost/static_assert.hpp>
namespace {
template< typename T, typename U >
void ref_test(boost::reference_wrapper<U>)
{
typedef typename boost::reference_wrapper<U>::type type;
BOOST_STATIC_ASSERT((boost::is_same<U,type>::value));
BOOST_STATIC_ASSERT((boost::is_same<T,type>::value));
}
template< typename T >
void assignable_test(T x)
{
x = x;
}
template< bool R, typename T >
void is_reference_wrapper_test(T)
{
BOOST_STATIC_ASSERT(boost::is_reference_wrapper<T>::value == R);
}
template< typename R, typename Ref >
void cxx_reference_test(Ref)
{
BOOST_STATIC_ASSERT((boost::is_same<R,Ref>::value));
}
template< typename R, typename Ref >
void unwrap_reference_test(Ref)
{
typedef typename boost::unwrap_reference<Ref>::type type;
BOOST_STATIC_ASSERT((boost::is_same<R,type>::value));
}
} // namespace
int main()
{
int i = 0;
int& ri = i;
int const ci = 0;
int const& rci = ci;
// 'ref/cref' functions test
ref_test<int>(boost::ref(i));
ref_test<int>(boost::ref(ri));
ref_test<int const>(boost::ref(ci));
ref_test<int const>(boost::ref(rci));
ref_test<int const>(boost::cref(i));
ref_test<int const>(boost::cref(ri));
ref_test<int const>(boost::cref(ci));
ref_test<int const>(boost::cref(rci));
// test 'assignable' requirement
assignable_test(boost::ref(i));
assignable_test(boost::ref(ri));
assignable_test(boost::cref(i));
assignable_test(boost::cref(ci));
assignable_test(boost::cref(rci));
// 'is_reference_wrapper' test
is_reference_wrapper_test<true>(boost::ref(i));
is_reference_wrapper_test<true>(boost::ref(ri));
is_reference_wrapper_test<true>(boost::cref(i));
is_reference_wrapper_test<true>(boost::cref(ci));
is_reference_wrapper_test<true>(boost::cref(rci));
is_reference_wrapper_test<false>(i);
is_reference_wrapper_test<false, int&>(ri);
is_reference_wrapper_test<false>(ci);
is_reference_wrapper_test<false, int const&>(rci);
// ordinary references/function template arguments deduction test
cxx_reference_test<int>(i);
cxx_reference_test<int>(ri);
cxx_reference_test<int>(ci);
cxx_reference_test<int>(rci);
cxx_reference_test<int&, int&>(i);
cxx_reference_test<int&, int&>(ri);
cxx_reference_test<int const&, int const&>(i);
cxx_reference_test<int const&, int const&>(ri);
cxx_reference_test<int const&, int const&>(ci);
cxx_reference_test<int const&, int const&>(rci);
// 'unwrap_reference' test
unwrap_reference_test<int>(boost::ref(i));
unwrap_reference_test<int>(boost::ref(ri));
unwrap_reference_test<int const>(boost::cref(i));
unwrap_reference_test<int const>(boost::cref(ci));
unwrap_reference_test<int const>(boost::cref(rci));
unwrap_reference_test<int>(i);
unwrap_reference_test<int>(ri);
unwrap_reference_test<int>(ci);
unwrap_reference_test<int>(rci);
unwrap_reference_test<int&, int&>(i);
unwrap_reference_test<int&, int&>(ri);
unwrap_reference_test<int const&, int const&>(i);
unwrap_reference_test<int const&, int const&>(ri);
unwrap_reference_test<int const&, int const&>(ci);
unwrap_reference_test<int const&, int const&>(rci);
return 0;
}

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// run-time test for "boost/ref.hpp" header content
// see 'ref_ct_test.cpp' for compile-time part
#if defined(_MSC_VER) && !defined(__ICL)
# pragma warning(disable: 4786) // identifier truncated in debug info
# pragma warning(disable: 4710) // function not inlined
# pragma warning(disable: 4711) // function selected for automatic inline expansion
# pragma warning(disable: 4514) // unreferenced inline removed
#endif
#include <boost/ref.hpp>
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
# pragma warning(push, 3)
#endif
#include <iostream>
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
# pragma warning(pop)
#endif
#define BOOST_INCLUDE_MAIN
#include <boost/test/test_tools.hpp>
namespace {
using namespace boost;
template <class T>
struct ref_wrapper
{
// Used to verify implicit conversion
static T* get_pointer(T& x)
{
return &x;
}
static T const* get_const_pointer(T const& x)
{
return &x;
}
template <class Arg>
static T* passthru(Arg x)
{
return get_pointer(x);
}
template <class Arg>
static T const* cref_passthru(Arg x)
{
return get_const_pointer(x);
}
static void test(T x)
{
BOOST_TEST(passthru(ref(x)) == &x);
BOOST_TEST(&ref(x).get() == &x);
BOOST_TEST(cref_passthru(cref(x)) == &x);
BOOST_TEST(&cref(x).get() == &x);
}
};
} // namespace unnamed
int test_main(int, char * [])
{
ref_wrapper<int>::test(1);
ref_wrapper<int const>::test(1);
return 0;
}

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"center" width="277" height="86">
<h1>Reverse Iterator Adaptor</h1>
Defined in header <a href=
"../../boost/iterator_adaptors.hpp">boost/iterator_adaptors.hpp</a>
<p>The reverse iterator adaptor flips the direction of a base iterator's
motion. Invoking <tt>operator++()</tt> moves the base iterator backward and
invoking <tt>operator--()</tt> moves the base iterator forward. The Boost
reverse iterator adaptor is better to use than the
<tt>std::reverse_iterator</tt> class in situations where pairs of
mutable/constant iterators are needed (e.g., in containers) because
comparisons and conversions between the mutable and const versions are
implemented correctly.
<h2>Synopsis</h2>
<pre>
namespace boost {
template &lt;class <a href=
"http://www.sgi.com/tech/stl/BidirectionalIterator.html">BidirectionalIterator</a>,
class Value, class Reference, class Pointer, class Category, class Distance&gt;
struct reverse_iterator_generator;
template &lt;class <a href=
"http://www.sgi.com/tech/stl/BidirectionalIterator.html">BidirectionalIterator</a>&gt;
typename reverse_iterator_generator&lt;BidirectionalIterator&gt;::type
make_reverse_iterator(BidirectionalIterator base)
}
</pre>
<hr>
<h2><a name="reverse_iterator_generator">The Reverse Iterator Type
Generator</a></h2>
The <tt>reverse_iterator_generator</tt> template is a <a href=
"../../more/generic_programming.html#type_generator">generator</a> of
reverse iterator types. The main template parameter for this class is the
base <tt>BidirectionalIterator</tt> type that is being adapted. In most
cases the associated types of the base iterator can be deduced using
<tt>std::iterator_traits</tt>, but in some situations the user may want to
override these types, so there are also template parameters for the base
iterator's associated types.
<blockquote>
<pre>
template &lt;class <a href=
"http://www.sgi.com/tech/stl/BidirectionalIterator.html">BidirectionalIterator</a>,
class Value, class Reference, class Pointer, class Category, class Distance&gt;
class reverse_iterator_generator
{
public:
typedef <tt><a href=
"./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt;...&gt;</tt> type; // the resulting reverse iterator type
};
</pre>
</blockquote>
<h3>Example</h3>
In this example we sort a sequence of letters and then output the sequence
in descending order using reverse iterators.
<blockquote>
<pre>
#include &lt;boost/config.hpp&gt;
#include &lt;iostream&gt;
#include &lt;algorithm&gt;
#include &lt;boost/iterator_adaptors.hpp&gt;
int main(int, char*[])
{
char letters[] = "hello world!";
const int N = sizeof(letters)/sizeof(char) - 1;
std::cout &lt;&lt; "original sequence of letters:\t"
&lt;&lt; letters &lt;&lt; std::endl;
std::sort(letters, letters + N);
// Use reverse_iterator_generator to print a sequence
// of letters in reverse order.
boost::reverse_iterator_generator&lt;char*&gt;::type
reverse_letters_first(letters + N),
reverse_letters_last(letters);
std::cout &lt;&lt; "letters in descending order:\t";
std::copy(reverse_letters_first, reverse_letters_last,
std::ostream_iterator&lt;char&gt;(std::cout));
std::cout &lt;&lt; std::endl;
// to be continued...
</pre>
</blockquote>
The output is:
<blockquote>
<pre>
original sequence of letters: hello world!
letters in descending order: wroolllhed!
</pre>
</blockquote>
<h3>Template Parameters</h3>
<table border>
<tr>
<th>Parameter
<th>Description
<tr>
<td><tt><a href=
"http://www.sgi.com/tech/stl/BidirectionalIterator.html">BidirectionalIterator</a></tt>
<td>The iterator type being wrapped.
<tr>
<td><tt>Value</tt>
<td>The value-type of the base iterator and the resulting reverse
iterator.<br>
<b>Default:</b><tt>std::iterator_traits&lt;BidirectionalIterator&gt;::value_type</tt>
<tr>
<td><tt>Reference</tt>
<td>The <tt>reference</tt> type of the resulting iterator, and in
particular, the result type of <tt>operator*()</tt>.<br>
<b>Default:</b> If <tt>Value</tt> is supplied, <tt>Value&amp;</tt> is
used. Otherwise
<tt>std::iterator_traits&lt;BidirectionalIterator&gt;::reference</tt>
is used.
<tr>
<td><tt>Pointer</tt>
<td>The <tt>pointer</tt> type of the resulting iterator, and in
particular, the result type of <tt>operator-&gt;()</tt>.<br>
<b>Default:</b> If <tt>Value</tt> was supplied, then <tt>Value*</tt>,
otherwise
<tt>std::iterator_traits&lt;BidirectionalIterator&gt;::pointer</tt>.
<tr>
<td><tt>Category</tt>
<td>The <tt>iterator_category</tt> type for the resulting iterator.<br>
<b>Default:</b>
<tt>std::iterator_traits&lt;BidirectionalIterator&gt;::iterator_category</tt>
<tr>
<td><tt>Distance</tt>
<td>The <tt>difference_type</tt> for the resulting iterator.<br>
<b>Default:</b>
<tt>std::iterator_traits&lt;BidirectionalIterator&amp;gt::difference_type</tt>
</table>
<h3>Concept Model</h3>
The indirect iterator will model whichever <a href=
"http://www.sgi.com/tech/stl/Iterators.html">standard iterator concept
category</a> is modeled by the base iterator. Thus, if the base iterator is
a model of <a href=
"http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access
Iterator</a> then so is the resulting indirect iterator. If the base
iterator models a more restrictive concept, the resulting indirect iterator
will model the same concept. The base iterator must be at least a <a href=
"http://www.sgi.com/tech/stl/BidirectionalIterator.html">Bidirectional
Iterator</a>
<h3>Members</h3>
The reverse iterator type implements the member functions and operators
required of the <a href=
"http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access
Iterator</a> concept. In addition it has the following constructor:
<blockquote>
<pre>
reverse_iterator_generator::type(const BidirectionalIterator&amp; it)
</pre>
</blockquote>
<br>
<br>
<hr>
<p>
<h2><a name="make_reverse_iterator">The Reverse Iterator Object
Generator</a></h2>
The <tt>make_reverse_iterator()</tt> function provides a more convenient
way to create reverse iterator objects. The function saves the user the
trouble of explicitly writing out the iterator types.
<blockquote>
<pre>
template &lt;class BidirectionalIterator&gt;
typename reverse_iterator_generator&lt;BidirectionalIterator&gt;::type
make_reverse_iterator(BidirectionalIterator base);
</pre>
</blockquote>
<h3>Example</h3>
In this part of the example we use <tt>make_reverse_iterator()</tt> to
print the sequence of letters in reverse-reverse order, which is the
original order.
<blockquote>
<pre>
// continuing from the previous example...
std::cout &lt;&lt; "letters in ascending order:\t";
std::copy(boost::make_reverse_iterator(reverse_letters_last),
boost::make_reverse_iterator(reverse_letters_first),
std::ostream_iterator&lt;char&gt;(std::cout));
std::cout &lt;&lt; std::endl;
return 0;
}
</pre>
</blockquote>
The output is:
<blockquote>
<pre>
letters in ascending order: !dehllloorw
</pre>
</blockquote>
<hr>
<h2><a name="interactions">Constant/Mutable Iterator Interactions</a></h2>
<p>One failing of the standard <tt><a
href="http://www.sgi.com/tech/stl/ReverseIterator.html">reverse_iterator</a></tt>
adaptor is that it doesn't properly support interactions between adapted
<tt>const</tt> and non-<tt>const</tt> iterators. For example:
<blockquote>
<pre>
#include &lt;vector&gt;
template &lt;class T&gt; void convert(T x) {}
// Test interactions of a matched pair of random access iterators
template &lt;class Iterator, class ConstIterator&gt;
void test_interactions(Iterator i, ConstIterator ci)
{
bool eq = i == ci; // comparisons
bool ne = i != ci;
bool lt = i &lt; ci;
bool le = i &lt;= ci;
bool gt = i &gt; ci;
bool ge = i &gt;= ci;
std::size_t distance = i - ci; // difference
ci = i; // assignment
ConstIterator ci2(i); // construction
convert&lt;ConstIterator&gt;(i); // implicit conversion
}
void f()
{
typedef std::vector&lt;int&gt; vec;
vec v;
const vec&amp; cv;
test_interactions(v.begin(), cv.begin()); // <font color="#007F00">OK</font>
test_interactions(v.rbegin(), cv.rbegin()); // <font color="#FF0000">ERRORS ON EVERY TEST!!</font>
</pre>
</blockquote>
Reverse iterators created with <tt>boost::reverse_iterator_generator</tt> don't have this problem, though:
<blockquote>
<pre>
typedef boost::reverse_iterator_generator&lt;vec::iterator&gt;::type ri;
typedef boost::reverse_iterator_generator&lt;vec::const_iterator&gt;::type cri;
test_interactions(ri(v.begin()), cri(cv.begin())); // <font color="#007F00">OK!!</font>
</pre>
</blockquote>
Or, more simply,
<blockquote>
<pre>
test_interactions(
boost::make_reverse_iterator(v.begin()),
boost::make_reverse_iterator(cv.begin())); // <font color="#007F00">OK!!</font>
}
</pre>
</blockquote>
<p>If you are wondering why there is no
<tt>reverse_iterator_pair_generator</tt> in the manner of <tt><a
href="projection_iterator.htm#projection_iterator_pair_generator">projection_iterator_pair_generator</a></tt>,
the answer is simple: we tried it, but found that in practice it took
<i>more</i> typing to use <tt>reverse_iterator_pair_generator</tt> than to
simply use <tt>reverse_iterator_generator</tt> twice!<br><br>
<hr>
<p>Revised
<!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan -->19 Aug 2001<!--webbot bot="Timestamp" endspan i-checksum="14767" -->
<p>&copy; Copyright Jeremy Siek 2000. Permission to copy, use, modify, sell
and distribute this document is granted provided this copyright notice
appears in all copies. This document is provided "as is" without express or
implied warranty, and with no claim as to its suitability for any purpose.
<!-- LocalWords: html charset alt gif hpp BidirectionalIterator const namespace struct
-->
<!-- LocalWords: ConstPointer ConstReference typename iostream int abcdefg
-->
<!-- LocalWords: sizeof PairGen pre Siek wroolllhed dehllloorw
-->
</body>
</html>

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@ -0,0 +1,51 @@
// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
#include <boost/config.hpp>
#include <iostream>
#include <algorithm>
#include <boost/iterator_adaptors.hpp>
int main(int, char*[])
{
char letters_[] = "hello world!";
const int N = sizeof(letters_)/sizeof(char) - 1;
#ifdef BOOST_NO_STD_ITERATOR_TRAITS
// Assume there won't be proper iterator traits for pointers. This
// is just a wrapper for char* which has the right traits.
typedef boost::iterator_adaptor<char*, boost::default_iterator_policies, char> base_iterator;
#else
typedef char* base_iterator;
#endif
base_iterator letters(letters_);
std::cout << "original sequence of letters:\t"
<< letters_ << std::endl;
std::sort(letters, letters + N);
// Use reverse_iterator_generator to print a sequence
// of letters in reverse order.
boost::reverse_iterator_generator<base_iterator>::type
reverse_letters_first(letters + N),
reverse_letters_last(letters);
std::cout << "letters in descending order:\t";
std::copy(reverse_letters_first, reverse_letters_last,
std::ostream_iterator<char>(std::cout));
std::cout << std::endl;
// Use make_reverse_iterator() to print the sequence
// of letters in reverse-reverse order.
std::cout << "letters in ascending order:\t";
std::copy(boost::make_reverse_iterator(reverse_letters_last),
boost::make_reverse_iterator(reverse_letters_first),
std::ostream_iterator<char>(std::cout));
std::cout << std::endl;
return 0;
}

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@ -23,7 +23,13 @@
<TT>tie</TT>
</H1>
<P>
<h3>
[This version of tie has been removed from the utility.hpp
header.&nbsp; There is a new, more general version of <a
href="../tuple/doc/tuple_users_guide.html#tiers">tie</a> in the Boost
Tuples Library. The more general version handles an (almost) arbitrary
number of arguments, instead of just two. The version in utility.hpp
had to be removed to avoid name clashes.]</h3>
<PRE>
template &lt;class A, class B&gt;
tied&lt;A,B&gt; tie(A&amp; a, B&amp; b);
@ -64,7 +70,7 @@ pair of iterators is assigned to the iterator variables <TT>i</TT> and
<P>
Here is another example that uses <TT>tie()</TT> for handling operations with <a
href="http://www.sgi.com/Technology/STL/set.html"><TT>std::set</TT></a>.
href="http://www.sgi.com/tech/stl/set.html"><TT>std::set</TT></a>.
<P>
<PRE>
@ -124,7 +130,7 @@ The output is:
<TABLE>
<TR valign=top>
<TD nowrap>Copyright &copy 2000</TD><TD>
<A HREF=http://www.boost.org/people/jeremy_siek.htm>Jeremy Siek</A>,
<a HREF="../../people/jeremy_siek.htm">Jeremy Siek</a>,
Univ.of Notre Dame (<A
HREF="mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</A>)<br>
<A HREF=http://www.lsc.nd.edu/~llee1>Lie-Quan Lee</A>, Univ.of Notre Dame (<A HREF="mailto:llee1@lsc.nd.edu">llee1@lsc.nd.edu</A>)<br>

View File

@ -14,19 +14,22 @@
//
// 3 successfully inserted.
// 9 was already in the set.
// There were 2 occurances of 4.
// There were 2 occurrences of 4.
#include <set>
#include <algorithm>
#include <iostream>
#include <boost/utility.hpp>
#include <iterator> // std::distance
// Note: tie() use to live in boost/utility.hpp, but
// not it is part of the more general Boost Tuple Library.
#include <boost/tuple/tuple.hpp>
int
main(int, char*[])
{
{
typedef std::set<int> SetT;
SetT::iterator i, end;
SetT::iterator i;
bool inserted;
int vals[5] = { 5, 2, 4, 9, 1 };
@ -39,9 +42,9 @@ main(int, char*[])
for (int k = 0; k < 2; ++k) {
boost::tie(i,inserted) = s.insert(new_vals[k]);
if (!inserted)
std::cout << *i << " was already in the set." << std::endl;
std::cout << *i << " was already in the set." << std::endl;
else
std::cout << *i << " successfully inserted." << std::endl;
std::cout << *i << " successfully inserted." << std::endl;
}
}
{
@ -53,7 +56,7 @@ main(int, char*[])
boost::tie(i,end) = std::equal_range(vals, vals + 6, 4);
std::cout << "There were " << std::distance(i,end)
<< " occurances of " << *i << "." << std::endl;
<< " occurrences of " << *i << "." << std::endl;
// Footnote: of course one would normally just use std::count()
// to get this information, but that would spoil the example :)
}

223
transform_iterator.htm Normal file
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@ -0,0 +1,223 @@
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Transform Iterator Adaptor Documentation</title>
</head>
<body bgcolor="#FFFFFF" text="#000000">
<img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)"
align="center" width="277" height="86">
<h1>Transform Iterator Adaptor</h1>
Defined in header
<a href="../../boost/iterator_adaptors.hpp">boost/iterator_adaptors.hpp</a>
<p>
The transform iterator adaptor augments an iterator by applying some
function object to the result of dereferencing the iterator. Another
words, the <tt>operator*</tt> of the transform iterator first
dereferences the base iterator, passes the result of this to the
function object, and then returns the result. The following
<b>pseudo-code</b> shows the basic idea:
<pre>
value_type transform_iterator::operator*() const {
return this->f(*this->base_iterator);
}
</pre>
All of the other operators of the transform iterator behave in the
same fashion as those of the base iterator.
<h2>Synopsis</h2>
<pre>
namespace boost {
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class BaseIterator&gt;
class transform_iterator_generator;
template &lt;class <a href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html">AdaptableUnaryFunction</a>, class BaseIterator&gt;
typename transform_iterator_generator&lt;AdaptableUnaryFunction,Iterator&gt;::type
make_transform_iterator(BaseIterator base, const AdaptableUnaryFunction&amp; f = AdaptableUnaryFunction());
}
</pre>
<hr>
<h2><a name="transform_iterator_generator">The Transform Iterator Type
Generator</a></h2>
The class <tt>transform_iterator_generator</tt> is a helper class whose
purpose is to construct a transform iterator type. The template
parameters for this class are the <tt>AdaptableUnaryFunction</tt> function object
type and the <tt>BaseIterator</tt> type that is being wrapped.
<pre>
template &lt;class AdaptableUnaryFunction, class Iterator&gt;
class transform_iterator_generator
{
public:
typedef <a href="./iterator_adaptors.htm#iterator_adaptor">iterator_adaptor</a>&lt;...&gt; type;
};
</pre>
<h3>Example</h3>
<p>
The following is an example of how to use the
<tt>transform_iterator_generator</tt> class to iterate through a range
of numbers, multiplying each of them by 2 when they are dereferenced.
The <tt>boost::binder1st</tt> class is used instead of the standard
one because tranform iterator requires the function object to be
Default Constructible.
<p>
<PRE>
#include &lt;functional&gt;
#include &lt;iostream&gt;
#include &lt;boost/iterator_adaptors.hpp&gt;
// definition of class boost::binder1st and function boost::bind1st() ...
int
main(int, char*[])
{
int x[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
typedef boost::binder1st&lt; std::multiplies&lt;int&gt; &gt; Function;
typedef boost::transform_iterator_generator&lt;Function, int*&gt;::type doubling_iterator;
doubling_iterator i(x, boost::bind1st(std::multiplies&lt;int&gt;(), 2)),
i_end(x + sizeof(x)/sizeof(int), boost::bind1st(std::multiplies&lt;int&gt;(), 2));
std::cout &lt;&lt; "multiplying the array by 2:" &lt;&lt; std::endl;
while (i != i_end)
std::cout &lt;&lt; *i++ &lt;&lt; " ";
std::cout &lt;&lt; std::endl;
// to be continued...
</PRE>
The output from this part is:
<pre>
2 4 6 8 10 12 14 16
</pre>
<h3>Template Parameters</h3>
<Table border>
<TR>
<TH>Parameter</TH><TH>Description</TH>
</TR>
<TR>
<TD><a
href="http://www.sgi.com/tech/stl/AdaptableUnaryFunction.html"><tt>AdaptableUnaryFunction</tt></a></TD>
<TD>The function object that transforms each element in the iterator
range. The <tt>argument_type</tt> of the function object must match
the value type of the base iterator. The <tt>result_type</tt> of the
function object will be the resulting iterator's
<tt>value_type</tt>. If you want the resulting iterator to behave as
an iterator, the result of the function should be solely a function of
its argument. Also, the function object must be <a
href="http://www.sgi.com/tech/stl/DefaultConstructible.html"> Default
Constructible</a> (which many of the standard function objects are not).</TD>
</TR>
<TR>
<TD><tt>BaseIterator</tt></TD>
<TD>The iterator type being wrapped. This type must at least be a model
of the <a href="http://www.sgi.com/tech/stl/InputIterator">InputIterator</a> concept.</TD>
</TR>
</Table>
<h3>Model of</h3>
The transform iterator adaptor (the type
<tt>transform_iterator_generator<...>::type</tt>) is a model of <a
href="http://www.sgi.com/tech/stl/InputIterator.html">Input Iterator</a><a href="#1">[1]</a>.
<h3>Members</h3>
The transform iterator type implements the member functions and
operators required of the <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>
concept, except that the <tt>reference</tt> type is the same as the <tt>value_type</tt>
so <tt>operator*()</tt> returns by-value. In addition it has the following constructor:
<pre>
transform_iterator_generator::type(const BaseIterator&amp; it,
const AdaptableUnaryFunction&amp; f = AdaptableUnaryFunction())
</pre>
<p>
<hr>
<p>
<h2><a name="make_transform_iterator">The Transform Iterator Object Generator</a></h2>
<pre>
template &lt;class AdaptableUnaryFunction, class BaseIterator&gt;
typename transform_iterator_generator&lt;AdaptableUnaryFunction,BaseIterator&gt;::type
make_transform_iterator(BaseIterator base,
const AdaptableUnaryFunction&amp; f = AdaptableUnaryFunction());
</pre>
This function provides a convenient way to create transform iterators.
<h3>Example</h3>
Continuing from the previous example, we use the <tt>make_transform_iterator()</tt>
function to add four to each element of the array.
<pre>
std::cout << "adding 4 to each element in the array:" << std::endl;
std::copy(boost::make_transform_iterator(x, boost::bind1st(std::plus<int>(), 4)),
boost::make_transform_iterator(x + N, boost::bind1st(std::plus<int>(), 4)),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
return 0;
}
</pre>
The output from this part is:
<pre>
5 6 7 8 9 10 11 12
</pre>
<h3>Notes</h3>
<a name="1">[1]</a> If the base iterator is a model of <a
href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">Random Access Iterator</a>
then the transform iterator will also suppport most of the
functionality required by the Random Access Iterator concept. However, a
transform iterator can never completely satisfy the requirements for
<a
href="http://www.sgi.com/tech/stl/ForwardIterator.html">Forward Iterator</a>
(or of any concepts that refine Forward Iterator, which includes
Random Access Iterator and Bidirectional Iterator) since the <tt>operator*</tt> of the transform
iterator always returns by-value.
<hr>
<p>Revised <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %b %Y" startspan -->19 Aug 2001<!--webbot bot="Timestamp" endspan i-checksum="14767" --></p>
<p><EFBFBD> Copyright Jeremy Siek 2000. Permission to copy, use,
modify, sell and distribute this document is granted provided this copyright
notice appears in all copies. This document is provided &quot;as is&quot;
without express or implied warranty, and with no claim as to its suitability for
any purpose.</p>
</body>
</html>

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@ -0,0 +1,76 @@
// (C) Copyright Jeremy Siek 2000. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
#include <functional>
#include <algorithm>
#include <iostream>
#include <boost/iterator_adaptors.hpp>
// What a bummer. We can't use std::binder1st with transform iterator
// because it does not have a default constructor. Here's a version
// that does.
namespace boost {
template <class Operation>
class binder1st
: public std::unary_function<typename Operation::second_argument_type,
typename Operation::result_type> {
protected:
Operation op;
typename Operation::first_argument_type value;
public:
binder1st() { } // this had to be added!
binder1st(const Operation& x,
const typename Operation::first_argument_type& y)
: op(x), value(y) {}
typename Operation::result_type
operator()(const typename Operation::second_argument_type& x) const {
return op(value, x);
}
};
template <class Operation, class T>
inline binder1st<Operation> bind1st(const Operation& op, const T& x) {
typedef typename Operation::first_argument_type arg1_type;
return binder1st<Operation>(op, arg1_type(x));
}
} // namespace boost
int
main(int, char*[])
{
// This is a simple example of using the transform_iterators class to
// generate iterators that multiply the value returned by dereferencing
// the iterator. In this case we are multiplying by 2.
// Would be cooler to use lambda library in this example.
int x[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
const int N = sizeof(x)/sizeof(int);
typedef boost::binder1st< std::multiplies<int> > Function;
typedef boost::transform_iterator_generator<Function, int*>::type doubling_iterator;
doubling_iterator i(x, boost::bind1st(std::multiplies<int>(), 2)),
i_end(x + N, boost::bind1st(std::multiplies<int>(), 2));
std::cout << "multiplying the array by 2:" << std::endl;
while (i != i_end)
std::cout << *i++ << " ";
std::cout << std::endl;
std::cout << "adding 4 to each element in the array:" << std::endl;
std::copy(boost::make_transform_iterator(x, boost::bind1st(std::plus<int>(), 4)),
boost::make_transform_iterator(x + N, boost::bind1st(std::plus<int>(), 4)),
std::ostream_iterator<int>(std::cout, " "));
std::cout << std::endl;
return 0;
}

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@ -0,0 +1,54 @@
// (C) Copyright Jeremy Siek 1999. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
// Revision History
// 08 Mar 2001 Jeremy Siek
// Moved test of transform iterator into its own file. It to
// to be in iterator_adaptor_test.cpp.
#include <boost/config.hpp>
#include <iostream>
#include <algorithm>
#include <boost/iterator_adaptors.hpp>
#include <boost/pending/iterator_tests.hpp>
struct mult_functor {
typedef int result_type;
typedef int argument_type;
// Functors used with transform_iterator must be
// DefaultConstructible, as the transform_iterator must be
// DefaultConstructible to satisfy the requirements for
// TrivialIterator.
mult_functor() { }
mult_functor(int aa) : a(aa) { }
int operator()(int b) const { return a * b; }
int a;
};
int
main()
{
const int N = 10;
// Borland is getting confused about typedef's and constructors here
// Test transform_iterator
{
int x[N], y[N];
for (int k = 0; k < N; ++k)
x[k] = k;
std::copy(x, x + N, y);
for (int k2 = 0; k2 < N; ++k2)
x[k2] = x[k2] * 2;
boost::transform_iterator_generator<mult_functor, int*>::type i(y, mult_functor(2));
boost::input_iterator_test(i, x[0], x[1]);
boost::input_iterator_test(boost::make_transform_iterator(&y[0], mult_functor(2)), x[0], x[1]);
}
std::cout << "test successful " << std::endl;
return 0;
}

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@ -1,620 +0,0 @@
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<meta name="Template"
content="C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\html.dot">
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<title>Type Traits</title>
</head>
<body bgcolor="#FFFFFF" link="#0000FF" vlink="#800080">
<h1><img src="../../c++boost.gif" width="276" height="86">Header
&lt;<a href="../../boost/detail/type_traits.hpp">boost/type_traits.hpp</a>&gt;</h1>
<p>The contents of &lt;boost/type_traits.hpp&gt; are declared in
namespace boost.</p>
<p>The file &lt;<a href="../../boost/detail/type_traits.hpp">boost/type_traits.hpp</a>&gt;
contains various template classes that describe the fundamental
properties of a type; each class represents a single type
property or a single type transformation. This documentation is
divided up into the following sections:</p>
<pre><a href="#fop">Fundamental type operations</a>
<a href="#fp">Fundamental type properties</a>
<a href="#misc">Miscellaneous</a>
<code> </code><a href="#cv">cv-Qualifiers</a>
<code> </code><a href="#ft">Fundamental Types</a>
<code> </code><a href="#ct">Compound Types</a>
<code> </code><a href="#ot">Object/Scalar Types</a>
<a href="#cs">Compiler Support Information</a>
<a href="#ec">Example Code</a></pre>
<h2><a name="fop"></a>Fundamental type operations</h2>
<p>Usage: &quot;class_name&lt;T&gt;::type&quot; performs
indicated transformation on type T.</p>
<table border="1" cellpadding="7" cellspacing="1" width="100%">
<tr>
<td valign="top" width="45%"><p align="center">Expression.</p>
</td>
<td valign="top" width="45%"><p align="center">Description.</p>
</td>
<td valign="top" width="33%"><p align="center">Compiler.</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>remove_volatile&lt;T&gt;::type</code></td>
<td valign="top" width="45%">Creates a type the same as T
but with any top level volatile qualifier removed. For
example &quot;volatile int&quot; would become &quot;int&quot;.</td>
<td valign="top" width="33%"><p align="center">P</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>remove_const&lt;T&gt;::type</code></td>
<td valign="top" width="45%">Creates a type the same as T
but with any top level const qualifier removed. For
example &quot;const int&quot; would become &quot;int&quot;.</td>
<td valign="top" width="33%"><p align="center">P</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>remove_cv&lt;T&gt;::type</code></td>
<td valign="top" width="45%">Creates a type the same as T
but with any top level cv-qualifiers removed. For example
&quot;const int&quot; would become &quot;int&quot;, and
&quot;volatile double&quot; would become &quot;double&quot;.</td>
<td valign="top" width="33%"><p align="center">P</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>remove_reference&lt;T&gt;::type</code></td>
<td valign="top" width="45%">If T is a reference type
then removes the reference, otherwise leaves T unchanged.
For example &quot;int&amp;&quot; becomes &quot;int&quot;
but &quot;int*&quot; remains unchanged.</td>
<td valign="top" width="33%"><p align="center">P</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>add_reference&lt;T&gt;::type</code></td>
<td valign="top" width="45%">If T is a reference type
then leaves T unchanged, otherwise converts T to a
reference type. For example &quot;int&amp;&quot; remains
unchanged, but &quot;double&quot; becomes &quot;double&amp;&quot;.</td>
<td valign="top" width="33%"><p align="center">P</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>remove_bounds&lt;T&gt;::type</code></td>
<td valign="top" width="45%">If T is an array type then
removes the top level array qualifier from T, otherwise
leaves T unchanged. For example &quot;int[2][3]&quot;
becomes &quot;int[3]&quot;.</td>
<td valign="top" width="33%"><p align="center">P</p>
</td>
</tr>
</table>
<p>&nbsp;</p>
<h2><a name="fp"></a>Fundamental type properties</h2>
<p>Usage: &quot;class_name&lt;T&gt;::value&quot; is true if
indicated property is true, false otherwise. (Note that class_name&lt;T&gt;::value
is always defined as a compile time constant).</p>
<h3><a name="misc"></a>Miscellaneous</h3>
<table border="1" cellspacing="1" width="100%">
<tr>
<td width="37%"><p align="center">Expression</p>
</td>
<td width="36%"><p align="center">Description</p>
</td>
<td width="27%"><p align="center">Compiler</p>
</td>
</tr>
<tr>
<td width="37%"><div align="center"><center><pre><code>is_same&lt;T,U&gt;::value</code></pre>
</center></div></td>
<td width="36%"><p align="center">True if T and U are the
same type.</p>
</td>
<td width="27%">&nbsp; </td>
</tr>
<tr>
<td width="37%"><div align="center"><center><pre>is_convertible&lt;T,U&gt;::value</pre>
</center></div></td>
<td width="36%"><p align="center">True if type T is
convertible to type U.</p>
</td>
<td width="27%">&nbsp;</td>
</tr>
<tr>
<td width="37%"><div align="center"><center><pre>alignment_of&lt;T&gt;::value</pre>
</center></div></td>
<td width="36%"><p align="center">An integral value
representing the minimum alignment requirements of type T
(strictly speaking defines a multiple of the type's
alignment requirement; for all compilers tested so far
however it does return the actual alignment).</p>
</td>
<td width="27%">&nbsp;</td>
</tr>
</table>
<p>&nbsp;</p>
<h3><a name="cv"></a>cv-Qualifiers</h3>
<p>The following classes determine what cv-qualifiers are present
on a type (see 3.93).</p>
<table border="1" cellpadding="7" cellspacing="1" width="100%">
<tr>
<td valign="top" width="37%"><p align="center">Expression.</p>
</td>
<td valign="top" width="37%"><p align="center">Description.</p>
</td>
<td valign="top" width="27%"><p align="center">Compiler.</p>
</td>
</tr>
<tr>
<td valign="top" width="37%"><code>is_const&lt;T&gt;::value</code></td>
<td valign="top" width="37%">True if type T is top-level
const qualified.</td>
<td valign="top" width="27%">&nbsp; </td>
</tr>
<tr>
<td valign="top" width="37%"><code>is_volatile&lt;T&gt;::value</code></td>
<td valign="top" width="37%">True if type T is top-level
volatile qualified.</td>
<td valign="top" width="27%">&nbsp; </td>
</tr>
</table>
<p>&nbsp;</p>
<h3><a name="ft"></a>Fundamental Types</h3>
<p>The following will only ever be true for cv-unqualified types;
these are closely based on the section 3.9 of the C++ Standard.</p>
<table border="1" cellpadding="7" cellspacing="1" width="100%">
<tr>
<td valign="top" width="45%"><p align="center">Expression.</p>
</td>
<td valign="top" width="45%"><p align="center">Description.</p>
</td>
<td valign="top" width="33%"><p align="center">Compiler.</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_void&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True only if T is void.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_standard_unsigned_integral&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True only if T is one of the
standard unsigned integral types (3.9.1 p3) - unsigned
char, unsigned short, unsigned int, and unsigned long.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_standard_signed_integral&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True only if T is one of the
standard signed integral types (3.9.1 p2) - signed char,
short, int, and long.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_standard_integral&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a standard
integral type(3.9.1 p7) - T is either char, wchar_t, bool
or either is_standard_signed_integral&lt;T&gt;::value or
is_standard_integral&lt;T&gt;::value is true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_standard_float&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is one of the
standard floating point types(3.9.1 p8) - float, double
or long double.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_standard_arithmetic&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a standard
arithmetic type(3.9.1 p8) - implies is_standard_integral
or is_standard_float is true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_standard_fundamental&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a standard
arithmetic type or if T is void.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_extension_unsigned_integral&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True for compiler specific
unsigned integral types.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_extension_signed_integral&lt;T&gt;&gt;:value</code></td>
<td valign="top" width="45%">True for compiler specific
signed integral types.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_extension_integral&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_extension_unsigned_integral&lt;T&gt;::value
or is_extension_signed_integral&lt;T&gt;::value is true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_extension_float&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True for compiler specific
floating point types.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_extension_arithmetic&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_extension_integral&lt;T&gt;::value
or is_extension_float&lt;T&gt;::value are true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>&nbsp;is_extension_fundamental&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_extension_arithmetic&lt;T&gt;::value
or is_void&lt;T&gt;::value are true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>&nbsp;is_unsigned_integral&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_standard_unsigned_integral&lt;T&gt;::value
or is_extention_unsigned_integral&lt;T&gt;::value are
true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_signed_integral&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_standard_signed_integral&lt;T&gt;::value
or is_extention_signed_integral&lt;T&gt;&gt;::value are
true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_integral&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_standard_integral&lt;T&gt;::value
or is_extention_integral&lt;T&gt;::value are true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_float&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_standard_float&lt;T&gt;::value
or is_extention_float&lt;T&gt;::value are true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_arithmetic&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_integral&lt;T&gt;::value
or is_float&lt;T&gt;::value are true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_fundamental&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if either is_arithmetic&lt;T&gt;::value
or is_void&lt;T&gt;::value are true.</td>
<td valign="top" width="33%">&nbsp;</td>
</tr>
</table>
<p>&nbsp;</p>
<h3><a name="ct"></a>Compound Types</h3>
<p>The following will only ever be true for cv-unqualified types,
as defined by the Standard.&nbsp;</p>
<table border="1" cellpadding="7" cellspacing="1" width="100%">
<tr>
<td valign="top" width="45%"><p align="center">Expression</p>
</td>
<td valign="top" width="45%"><p align="center">Description</p>
</td>
<td valign="top" width="33%"><p align="center">Compiler</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_array&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is an array type.</td>
<td valign="top" width="33%"><p align="center">P</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_pointer&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a regular
pointer type - including function pointers - but
excluding pointers to member functions (3.9.2 p1 and 8.3.1).</td>
<td valign="top" width="33%">&nbsp; </td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_member_pointer&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a pointer to a
non-static class member (3.9.2 p1 and 8.3.1).</td>
<td valign="top" width="33%">&nbsp; </td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_reference&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a reference
type (3.9.2 p1 and 8.3.2).</td>
<td valign="top" width="33%">&nbsp; </td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_class&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a class or
struct type.</td>
<td valign="top" width="33%"><p align="center">PD</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_union&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a union type.</td>
<td valign="top" width="33%"><p align="center">C</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_enum&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is an enumerator
type.</td>
<td valign="top" width="33%"><p align="center">C</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_compound&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is any of the
above compound types.</td>
<td valign="top" width="33%"><p align="center">PD</p>
</td>
</tr>
</table>
<p>&nbsp;</p>
<h3><a name="ot"></a>Object/Scalar Types</h3>
<p>The following ignore any top level cv-qualifiers: if <code>class_name&lt;T&gt;::value</code>
is true then <code>class_name&lt;cv-qualified-T&gt;::value</code>
will also be true.</p>
<table border="1" cellpadding="7" cellspacing="1" width="100%">
<tr>
<td valign="top" width="45%"><p align="center">Expression</p>
</td>
<td valign="top" width="45%"><p align="center">Description</p>
</td>
<td valign="top" width="33%"><p align="center">Compiler</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_object&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is not a reference
type, or a (possibly cv-qualified) void type.</td>
<td valign="top" width="33%"><p align="center">P</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_standard_scalar&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a standard
arithmetic type, an enumerated type, a pointer or a
member pointer.</td>
<td valign="top" width="33%"><p align="center">PD</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_extension_scalar&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is an extentions
arithmetic type, an enumerated type, a pointer or a
member pointer.</td>
<td valign="top" width="33%"><p align="center">PD</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_scalar&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is an arithmetic
type, an enumerated type, a pointer or a member pointer.</td>
<td valign="top" width="33%"><p align="center">PD</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_POD&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is a &quot;Plain
Old Data&quot; type (see 3.9 p2&amp;p3). Note that
although this requires compiler support to be correct in
all cases, if T is a scalar or an array of scalars then
we can correctly define T as a POD.</td>
<td valign="top" width="33%"><p align="center">PC</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>is_empty&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T is an empty struct
or class. If the compiler implements the &quot;zero sized
empty base classes&quot; optimisation, then is_empty will
correctly guess whether T is empty. Relies upon is_class
to determine whether T is a class type. Screens out enum
types by using is_convertible&lt;T,int&gt;, this means
that empty classes that overload operator int(), will not
be classified as empty.</td>
<td valign="top" width="33%"><p align="center">PCD</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>has_trivial_constructor&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T has a trivial
default constructor - that is T() is equivalent to memset.</td>
<td valign="top" width="33%"><p align="center">PC</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>has_trivial_copy&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T has a trivial copy
constructor - that is T(const T&amp;) is equivalent to
memcpy.</td>
<td valign="top" width="33%"><p align="center">PC</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>has_trivial_assign&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T has a trivial
assignment operator - that is if T::operator=(const T&amp;)
is equivalent to memcpy.</td>
<td valign="top" width="33%"><p align="center">PC</p>
</td>
</tr>
<tr>
<td valign="top" width="45%"><code>has_trivial_destructor&lt;T&gt;::value</code></td>
<td valign="top" width="45%">True if T has a trivial
destructor - that is if T::~T() has no effect.</td>
<td valign="top" width="33%"><p align="center">PC</p>
</td>
</tr>
</table>
<p>&nbsp;</p>
<h2><a name="cs"></a>Compiler Support Information</h2>
<p>The legends used in the tables above have the following
meanings:</p>
<table border="0" cellpadding="7" cellspacing="0" width="480">
<tr>
<td valign="top" width="50%"><p align="center">P</p>
</td>
<td valign="top" width="90%">Denotes that the class
requires support for partial specialisation of class
templates to work correctly.</td>
</tr>
<tr>
<td valign="top" width="50%"><p align="center">C</p>
</td>
<td valign="top" width="90%">Denotes that direct compiler
support for that traits class is required.</td>
</tr>
<tr>
<td valign="top" width="50%"><p align="center">D</p>
</td>
<td valign="top" width="90%">Denotes that the traits
class is dependent upon a class that requires direct
compiler support.</td>
</tr>
</table>
<p>&nbsp;</p>
<p>For those classes that are marked with a D or C, if compiler
support is not provided, this type trait may return &quot;false&quot;
when the correct value is actually &quot;true&quot;. The single
exception to this rule is &quot;is_class&quot;, which attempts to
guess whether or not T is really a class, and may return &quot;true&quot;
when the correct value is actually &quot;false&quot;. This can
happen if: T is a union, T is an enum, or T is a compiler-supplied
scalar type that is not specialised for in these type traits.</p>
<p><i>If there is no compiler support</i>, to ensure that these
traits <i>always</i> return the correct values, specialise 'is_enum'
for each user-defined enumeration type, 'is_union' for each user-defined
union type, 'is_empty' for each user-defined empty composite type,
and 'is_POD' for each user-defined POD type. The 'has_*' traits
should also be specialized if the user-defined type has those
traits and is <i>not</i> a POD.</p>
<p>The following rules are automatically enforced:</p>
<p>is_enum implies is_POD</p>
<p>is_POD implies has_*</p>
<p>This means, for example, if you have an empty POD-struct, just
specialize is_empty and is_POD, which will cause all the has_* to
also return true.</p>
<h2><a name="ec"></a>Example code</h2>
<p>Type-traits comes with two sample programs: <a
href="type_traits_test.cpp">type_traits_test.cpp</a> tests the
type traits classes - mostly this is a test of your compiler's
support for the concepts used in the type traits implementation,
while <a href="algo_opt_examples.cpp">algo_opt_examples.cpp</a>
uses the type traits classes to &quot;optimise&quot; some
familiar standard library algorithms.</p>
<p>There are four algorithm examples in algo_opt_examples.cpp:</p>
<table border="0" cellpadding="7" cellspacing="0" width="638">
<tr>
<td valign="top" width="50%"><pre>opt::copy</pre>
</td>
<td valign="top" width="50%">If the copy operation can be
performed using memcpy then does so, otherwise uses a
regular element by element copy (<i>c.f.</i> std::copy).</td>
</tr>
<tr>
<td valign="top" width="50%"><pre>opt::fill</pre>
</td>
<td valign="top" width="50%">If the fill operation can be
performed by memset, then does so, otherwise uses a
regular element by element assign. Also uses call_traits
to optimise how the parameters can be passed (<i>c.f.</i>
std::fill).</td>
</tr>
<tr>
<td valign="top" width="50%"><pre>opt::destroy_array</pre>
</td>
<td valign="top" width="50%">If the type in the array has
a trivial destructor then does nothing, otherwise calls
destructors for all elements in the array - this
algorithm is the reverse of std::uninitialized_copy / std::uninitialized_fill.</td>
</tr>
<tr>
<td valign="top" width="50%"><pre>opt::iter_swap</pre>
</td>
<td valign="top" width="50%">Determines whether the
iterator is a proxy-iterator: if it is then does a &quot;slow
and safe&quot; swap, otherwise calls std::swap on the
assumption that std::swap may be specialised for the
iterated type.</td>
</tr>
</table>
<p>&nbsp;</p>
<hr>
<p>Revised 01 September 2000</p>
<p><EFBFBD> Copyright boost.org 2000. Permission to copy, use, modify,
sell and distribute this document is granted provided this
copyright notice appears in all copies. This document is provided
&quot;as is&quot; without express or implied warranty, and with
no claim as to its suitability for any purpose.</p>
<p>Based on contributions by Steve Cleary, Beman Dawes, Howard
Hinnant and John Maddock.</p>
<p>Maintained by <a href="mailto:John_Maddock@compuserve.com">John
Maddock</a>, the latest version of this file can be found at <a
href="http://www.boost.org/">www.boost.org</a>, and the boost
discussion list at <a href="http://www.egroups.com/list/boost">www.egroups.com/list/boost</a>.</p>
</body>
</html>

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@ -1,672 +0,0 @@
// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
// Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// standalone test program for <boost/type_traits.hpp>
/* Release notes:
31 Jan 2001:
Added a test for is_array using a const array and a test for
is_convertible with a user-defined implicit conversion. Changed
signature of main() so that this program will link under
MSVC. (Jeremy Siek)
20 Jan 2001:
Suppress an expected warning for MSVC
Added a test to prove that we can use void with is_same<>
Removed "press any key to exit" as it interferes with testing in large
batches.
(David Abahams)
31st July 2000:
Added extra tests for is_empty, is_convertible, alignment_of.
23rd July 2000:
Removed all call_traits tests to call_traits_test.cpp
Removed all compressed_pair tests to compressed_pair_tests.cpp
Improved tests macros
Tidied up specialistions of type_types classes for test cases. */
#include <iostream>
#include <typeinfo>
#include <boost/type_traits.hpp>
#include <boost/utility.hpp>
#include "type_traits_test.hpp"
using namespace boost;
// Since there is no compiler support, we should specialize:
// is_enum for all enumerations (is_enum implies is_POD)
// is_union for all unions
// is_empty for all empty composites
// is_POD for all PODs (except enums) (is_POD implies has_*)
// has_* for any UDT that has that trait and is not POD
enum enum_UDT{ one, two, three };
struct UDT
{
UDT();
~UDT();
UDT(const UDT&);
UDT& operator=(const UDT&);
int i;
void f1();
int f2();
int f3(int);
int f4(int, float);
};
struct POD_UDT { int x; };
struct empty_UDT{ ~empty_UDT(){}; };
struct empty_POD_UDT{};
union union_UDT
{
int x;
double y;
~union_UDT();
};
union POD_union_UDT
{
int x;
double y;
};
union empty_union_UDT
{
~empty_union_UDT();
};
union empty_POD_union_UDT{};
#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
namespace boost {
template <> struct is_enum<enum_UDT>
{ static const bool value = true; };
template <> struct is_POD<POD_UDT>
{ static const bool value = true; };
// this type is not POD, so we have to specialize the has_* individually
template <> struct has_trivial_constructor<empty_UDT>
{ static const bool value = true; };
template <> struct has_trivial_copy<empty_UDT>
{ static const bool value = true; };
template <> struct has_trivial_assign<empty_UDT>
{ static const bool value = true; };
template <> struct is_POD<empty_POD_UDT>
{ static const bool value = true; };
template <> struct is_union<union_UDT>
{ static const bool value = true; };
template <> struct is_union<POD_union_UDT>
{ static const bool value = true; };
template <> struct is_POD<POD_union_UDT>
{ static const bool value = true; };
template <> struct is_union<empty_union_UDT>
{ static const bool value = true; };
// this type is not POD, so we have to specialize the has_* individually
template <> struct has_trivial_constructor<empty_union_UDT>
{ static const bool value = true; };
template <> struct has_trivial_copy<empty_union_UDT>
{ static const bool value = true; };
template <> struct has_trivial_assign<empty_union_UDT>
{ static const bool value = true; };
template <> struct is_union<empty_POD_union_UDT>
{ static const bool value = true; };
template <> struct is_POD<empty_POD_union_UDT>
{ static const bool value = true; };
}
#else
namespace boost {
template <> struct is_enum<enum_UDT>
{ enum{ value = true }; };
template <> struct is_POD<POD_UDT>
{ enum{ value = true }; };
// this type is not POD, so we have to specialize the has_* individually
template <> struct has_trivial_constructor<empty_UDT>
{ enum{ value = true }; };
template <> struct has_trivial_copy<empty_UDT>
{ enum{ value = true }; };
template <> struct has_trivial_assign<empty_UDT>
{ enum{ value = true }; };
template <> struct is_POD<empty_POD_UDT>
{ enum{ value = true }; };
template <> struct is_union<union_UDT>
{ enum{ value = true }; };
template <> struct is_union<POD_union_UDT>
{ enum{ value = true }; };
template <> struct is_POD<POD_union_UDT>
{ enum{ value = true }; };
template <> struct is_union<empty_union_UDT>
{ enum{ value = true }; };
// this type is not POD, so we have to specialize the has_* individually
template <> struct has_trivial_constructor<empty_union_UDT>
{ enum{ value = true }; };
template <> struct has_trivial_copy<empty_union_UDT>
{ enum{ value = true }; };
template <> struct has_trivial_assign<empty_union_UDT>
{ enum{ value = true }; };
template <> struct is_union<empty_POD_union_UDT>
{ enum{ value = true }; };
template <> struct is_POD<empty_POD_union_UDT>
{ enum{ value = true }; };
}
#endif
class Base { };
class Derived : public Base { };
class NonDerived { };
enum enum1
{
one_,two_
};
enum enum2
{
three_,four_
};
struct VB
{
virtual ~VB(){};
};
struct VD : VB
{
~VD(){};
};
//
// struct non_pointer:
// used to verify that is_pointer does not return
// true for class types that implement operator void*()
//
struct non_pointer
{
operator void*(){return this;}
};
//
// struct non_empty:
// used to verify that is_empty does not emit
// spurious warnings or errors.
//
struct non_empty : boost::noncopyable
{
int i;
};
struct implicitly_convertible_to_int {
operator int() { return 0; }
};
// Steve: All comments that I (Steve Cleary) have added below are prefixed with
// "Steve:" The failures that BCB4 has on the tests are due to Borland's
// not considering cv-qual's as a part of the type -- they are considered
// compiler hints only. These failures should be fixed before long.
int main(int, char*[])
{
std::cout << "Checking type operations..." << std::endl << std::endl;
// cv-qualifiers applied to reference types should have no effect
// declare these here for later use with is_reference and remove_reference:
typedef int& r_type;
#ifdef BOOST_MSVC
# pragma warning(push)
# pragma warning(disable:4181) // qualifier applied to reference type ignored
#endif
typedef const r_type cr_type;
#ifdef BOOST_MSVC
# pragma warning(pop)
#endif
type_test(int, remove_reference<int>::type)
type_test(const int, remove_reference<const int>::type)
type_test(int, remove_reference<int&>::type)
type_test(const int, remove_reference<const int&>::type)
type_test(volatile int, remove_reference<volatile int&>::type)
type_test(int, remove_reference<cr_type>::type)
type_test(int, remove_const<const int>::type)
// Steve: fails on BCB4
type_test(volatile int, remove_const<volatile int>::type)
// Steve: fails on BCB4
type_test(volatile int, remove_const<const volatile int>::type)
type_test(int, remove_const<int>::type)
type_test(int*, remove_const<int* const>::type)
type_test(int, remove_volatile<volatile int>::type)
// Steve: fails on BCB4
type_test(const int, remove_volatile<const int>::type)
// Steve: fails on BCB4
type_test(const int, remove_volatile<const volatile int>::type)
type_test(int, remove_volatile<int>::type)
type_test(int*, remove_volatile<int* volatile>::type)
type_test(int, remove_cv<volatile int>::type)
type_test(int, remove_cv<const int>::type)
type_test(int, remove_cv<const volatile int>::type)
type_test(int, remove_cv<int>::type)
type_test(int*, remove_cv<int* volatile>::type)
type_test(int*, remove_cv<int* const>::type)
type_test(int*, remove_cv<int* const volatile>::type)
type_test(const int *, remove_cv<const int * const>::type)
type_test(int, remove_bounds<int>::type)
type_test(int*, remove_bounds<int*>::type)
type_test(int, remove_bounds<int[3]>::type)
type_test(int[3], remove_bounds<int[2][3]>::type)
std::cout << std::endl << "Checking type properties..." << std::endl << std::endl;
value_test(true, (is_same<void, void>::value))
value_test(false, (is_same<int, void>::value))
value_test(false, (is_same<void, int>::value))
value_test(true, (is_same<int, int>::value))
value_test(false, (is_same<int, const int>::value))
value_test(false, (is_same<int, int&>::value))
value_test(false, (is_same<int*, const int*>::value))
value_test(false, (is_same<int*, int*const>::value))
value_test(false, (is_same<int, int[2]>::value))
value_test(false, (is_same<int*, int[2]>::value))
value_test(false, (is_same<int[4], int[2]>::value))
value_test(false, is_const<int>::value)
value_test(true, is_const<const int>::value)
value_test(false, is_const<volatile int>::value)
value_test(true, is_const<const volatile int>::value)
value_test(false, is_volatile<int>::value)
value_test(false, is_volatile<const int>::value)
value_test(true, is_volatile<volatile int>::value)
value_test(true, is_volatile<const volatile int>::value)
value_test(true, is_void<void>::value)
// Steve: fails on BCB4
// JM: but looks as though it should according to [3.9.3p1]?
//value_test(false, is_void<const void>::value)
value_test(false, is_void<int>::value)
value_test(false, is_standard_unsigned_integral<UDT>::value)
value_test(false, is_standard_unsigned_integral<void>::value)
value_test(false, is_standard_unsigned_integral<bool>::value)
value_test(false, is_standard_unsigned_integral<char>::value)
value_test(false, is_standard_unsigned_integral<signed char>::value)
value_test(true, is_standard_unsigned_integral<unsigned char>::value)
value_test(false, is_standard_unsigned_integral<wchar_t>::value)
value_test(false, is_standard_unsigned_integral<short>::value)
value_test(true, is_standard_unsigned_integral<unsigned short>::value)
value_test(false, is_standard_unsigned_integral<int>::value)
value_test(true, is_standard_unsigned_integral<unsigned int>::value)
value_test(false, is_standard_unsigned_integral<long>::value)
value_test(true, is_standard_unsigned_integral<unsigned long>::value)
value_test(false, is_standard_unsigned_integral<float>::value)
value_test(false, is_standard_unsigned_integral<double>::value)
value_test(false, is_standard_unsigned_integral<long double>::value)
#ifdef ULLONG_MAX
value_test(false, is_standard_unsigned_integral<long long>::value)
value_test(false, is_standard_unsigned_integral<unsigned long long>::value)
#endif
#if defined(__BORLANDC__) || defined(_MSC_VER)
value_test(false, is_standard_unsigned_integral<__int64>::value)
value_test(false, is_standard_unsigned_integral<unsigned __int64>::value)
#endif
value_test(false, is_standard_signed_integral<UDT>::value)
value_test(false, is_standard_signed_integral<void>::value)
value_test(false, is_standard_signed_integral<bool>::value)
value_test(false, is_standard_signed_integral<char>::value)
value_test(true, is_standard_signed_integral<signed char>::value)
value_test(false, is_standard_signed_integral<unsigned char>::value)
value_test(false, is_standard_signed_integral<wchar_t>::value)
value_test(true, is_standard_signed_integral<short>::value)
value_test(false, is_standard_signed_integral<unsigned short>::value)
value_test(true, is_standard_signed_integral<int>::value)
value_test(false, is_standard_signed_integral<unsigned int>::value)
value_test(true, is_standard_signed_integral<long>::value)
value_test(false, is_standard_signed_integral<unsigned long>::value)
value_test(false, is_standard_signed_integral<float>::value)
value_test(false, is_standard_signed_integral<double>::value)
value_test(false, is_standard_signed_integral<long double>::value)
#ifdef ULLONG_MAX
value_test(false, is_standard_signed_integral<long long>::value)
value_test(false, is_standard_signed_integral<unsigned long long>::value)
#endif
#if defined(__BORLANDC__) || defined(_MSC_VER)
value_test(false, is_standard_signed_integral<__int64>::value)
value_test(false, is_standard_signed_integral<unsigned __int64>::value)
#endif
value_test(false, is_standard_arithmetic<UDT>::value)
value_test(false, is_standard_arithmetic<void>::value)
value_test(true, is_standard_arithmetic<bool>::value)
value_test(true, is_standard_arithmetic<char>::value)
value_test(true, is_standard_arithmetic<signed char>::value)
value_test(true, is_standard_arithmetic<unsigned char>::value)
value_test(true, is_standard_arithmetic<wchar_t>::value)
value_test(true, is_standard_arithmetic<short>::value)
value_test(true, is_standard_arithmetic<unsigned short>::value)
value_test(true, is_standard_arithmetic<int>::value)
value_test(true, is_standard_arithmetic<unsigned int>::value)
value_test(true, is_standard_arithmetic<long>::value)
value_test(true, is_standard_arithmetic<unsigned long>::value)
value_test(true, is_standard_arithmetic<float>::value)
value_test(true, is_standard_arithmetic<double>::value)
value_test(true, is_standard_arithmetic<long double>::value)
#ifdef ULLONG_MAX
value_test(false, is_standard_arithmetic<long long>::value)
value_test(false, is_standard_arithmetic<unsigned long long>::value)
#endif
#if defined(__BORLANDC__) || defined(_MSC_VER)
value_test(false, is_standard_arithmetic<__int64>::value)
value_test(false, is_standard_arithmetic<unsigned __int64>::value)
#endif
value_test(false, is_standard_fundamental<UDT>::value)
value_test(true, is_standard_fundamental<void>::value)
value_test(true, is_standard_fundamental<bool>::value)
value_test(true, is_standard_fundamental<char>::value)
value_test(true, is_standard_fundamental<signed char>::value)
value_test(true, is_standard_fundamental<unsigned char>::value)
value_test(true, is_standard_fundamental<wchar_t>::value)
value_test(true, is_standard_fundamental<short>::value)
value_test(true, is_standard_fundamental<unsigned short>::value)
value_test(true, is_standard_fundamental<int>::value)
value_test(true, is_standard_fundamental<unsigned int>::value)
value_test(true, is_standard_fundamental<long>::value)
value_test(true, is_standard_fundamental<unsigned long>::value)
value_test(true, is_standard_fundamental<float>::value)
value_test(true, is_standard_fundamental<double>::value)
value_test(true, is_standard_fundamental<long double>::value)
#ifdef ULLONG_MAX
value_test(false, is_standard_fundamental<long long>::value)
value_test(false, is_standard_fundamental<unsigned long long>::value)
#endif
#if defined(__BORLANDC__) || defined(_MSC_VER)
value_test(false, is_standard_fundamental<__int64>::value)
value_test(false, is_standard_fundamental<unsigned __int64>::value)
#endif
value_test(false, is_arithmetic<UDT>::value)
value_test(true, is_arithmetic<char>::value)
value_test(true, is_arithmetic<signed char>::value)
value_test(true, is_arithmetic<unsigned char>::value)
value_test(true, is_arithmetic<wchar_t>::value)
value_test(true, is_arithmetic<short>::value)
value_test(true, is_arithmetic<unsigned short>::value)
value_test(true, is_arithmetic<int>::value)
value_test(true, is_arithmetic<unsigned int>::value)
value_test(true, is_arithmetic<long>::value)
value_test(true, is_arithmetic<unsigned long>::value)
value_test(true, is_arithmetic<float>::value)
value_test(true, is_arithmetic<double>::value)
value_test(true, is_arithmetic<long double>::value)
value_test(true, is_arithmetic<bool>::value)
#ifdef ULLONG_MAX
value_test(true, is_arithmetic<long long>::value)
value_test(true, is_arithmetic<unsigned long long>::value)
#endif
#if defined(__BORLANDC__) || defined(_MSC_VER)
value_test(true, is_arithmetic<__int64>::value)
value_test(true, is_arithmetic<unsigned __int64>::value)
#endif
value_test(false, is_array<int>::value)
value_test(false, is_array<int*>::value)
value_test(false, is_array<const int*>::value)
value_test(false, is_array<const volatile int*>::value)
value_test(true, is_array<int[2]>::value)
value_test(true, is_array<const int[2]>::value)
value_test(true, is_array<const volatile int[2]>::value)
value_test(true, is_array<int[2][3]>::value)
value_test(true, is_array<UDT[2]>::value)
value_test(false, is_array<int(&)[2]>::value)
value_test(true, is_array<const int[2]>::value)
typedef void(*f1)();
typedef int(*f2)(int);
typedef int(*f3)(int, bool);
typedef void (UDT::*mf1)();
typedef int (UDT::*mf2)();
typedef int (UDT::*mf3)(int);
typedef int (UDT::*mf4)(int, float);
value_test(false, is_const<f1>::value)
value_test(false, is_reference<f1>::value)
value_test(false, is_array<f1>::value)
value_test(false, is_pointer<int>::value)
value_test(false, is_pointer<int&>::value)
value_test(true, is_pointer<int*>::value)
value_test(true, is_pointer<const int*>::value)
value_test(true, is_pointer<volatile int*>::value)
value_test(true, is_pointer<non_pointer*>::value)
// Steve: was 'true', should be 'false', via 3.9.2p3, 3.9.3p1
value_test(false, is_pointer<int*const>::value)
// Steve: was 'true', should be 'false', via 3.9.2p3, 3.9.3p1
value_test(false, is_pointer<int*volatile>::value)
// Steve: was 'true', should be 'false', via 3.9.2p3, 3.9.3p1
value_test(false, is_pointer<int*const volatile>::value)
// JM 02 Oct 2000:
value_test(false, is_pointer<non_pointer>::value)
value_test(false, is_pointer<int*&>::value)
value_test(false, is_pointer<int(&)[2]>::value)
value_test(false, is_pointer<int[2]>::value)
value_test(false, is_pointer<char[sizeof(void*)]>::value)
value_test(true, is_pointer<f1>::value)
value_test(true, is_pointer<f2>::value)
value_test(true, is_pointer<f3>::value)
// Steve: was 'true', should be 'false', via 3.9.2p3
value_test(false, is_pointer<mf1>::value)
// Steve: was 'true', should be 'false', via 3.9.2p3
value_test(false, is_pointer<mf2>::value)
// Steve: was 'true', should be 'false', via 3.9.2p3
value_test(false, is_pointer<mf3>::value)
// Steve: was 'true', should be 'false', via 3.9.2p3
value_test(false, is_pointer<mf4>::value)
value_test(false, is_reference<bool>::value)
value_test(true, is_reference<int&>::value)
value_test(true, is_reference<const int&>::value)
value_test(true, is_reference<volatile int &>::value)
value_test(true, is_reference<r_type>::value)
value_test(true, is_reference<cr_type>::value)
value_test(true, is_reference<const UDT&>::value)
value_test(false, is_class<int>::value)
value_test(false, is_class<const int>::value)
value_test(false, is_class<volatile int>::value)
value_test(false, is_class<int*>::value)
value_test(false, is_class<int* const>::value)
value_test(false, is_class<int[2]>::value)
value_test(false, is_class<int&>::value)
value_test(false, is_class<mf4>::value)
value_test(false, is_class<f1>::value)
value_test(false, is_class<enum_UDT>::value)
value_test(true, is_class<UDT>::value)
value_test(true, is_class<UDT const>::value)
value_test(true, is_class<UDT volatile>::value)
value_test(true, is_class<empty_UDT>::value)
value_test(true, is_class<std::iostream>::value)
value_test(false, is_class<UDT*>::value)
value_test(false, is_class<UDT[2]>::value)
value_test(false, is_class<UDT&>::value)
value_test(true, is_object<int>::value)
value_test(true, is_object<UDT>::value)
value_test(false, is_object<int&>::value)
value_test(false, is_object<void>::value)
value_test(true, is_standard_scalar<int>::value)
value_test(true, is_extension_scalar<void*>::value)
value_test(false, is_enum<int>::value)
value_test(true, is_enum<enum_UDT>::value)
value_test(false, is_member_pointer<f1>::value)
value_test(false, is_member_pointer<f2>::value)
value_test(false, is_member_pointer<f3>::value)
value_test(true, is_member_pointer<mf1>::value)
value_test(true, is_member_pointer<mf2>::value)
value_test(true, is_member_pointer<mf3>::value)
value_test(true, is_member_pointer<mf4>::value)
value_test(false, is_empty<int>::value)
value_test(false, is_empty<int*>::value)
value_test(false, is_empty<int&>::value)
#if defined(__MWERKS__) || defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
// apparent compiler bug causes this to fail to compile:
value_fail(false, is_empty<int[2]>::value)
#else
value_test(false, is_empty<int[2]>::value)
#endif
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
value_fail(false, is_empty<f1>::value)
#else
value_test(false, is_empty<f1>::value)
#endif
value_test(false, is_empty<mf1>::value)
value_test(false, is_empty<UDT>::value)
value_test(true, is_empty<empty_UDT>::value)
value_test(true, is_empty<empty_POD_UDT>::value)
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
value_fail(true, is_empty<empty_union_UDT>::value)
#else
value_test(true, is_empty<empty_union_UDT>::value)
#endif
value_test(false, is_empty<enum_UDT>::value)
value_test(true, is_empty<boost::noncopyable>::value)
value_test(false, is_empty<non_empty>::value)
value_test(true, has_trivial_constructor<int>::value)
value_test(true, has_trivial_constructor<int*>::value)
value_test(true, has_trivial_constructor<int*const>::value)
value_test(true, has_trivial_constructor<const int>::value)
value_test(true, has_trivial_constructor<volatile int>::value)
value_test(true, has_trivial_constructor<int[2]>::value)
value_test(true, has_trivial_constructor<int[3][2]>::value)
value_test(true, has_trivial_constructor<int[2][4][5][6][3]>::value)
value_test(true, has_trivial_constructor<f1>::value)
value_test(true, has_trivial_constructor<mf2>::value)
value_test(false, has_trivial_constructor<UDT>::value)
value_test(true, has_trivial_constructor<empty_UDT>::value)
value_test(true, has_trivial_constructor<enum_UDT>::value)
value_test(true, has_trivial_copy<int>::value)
value_test(true, has_trivial_copy<int*>::value)
value_test(true, has_trivial_copy<int*const>::value)
value_test(true, has_trivial_copy<const int>::value)
// Steve: was 'false' -- should be 'true' via 3.9p3, 3.9p10
value_test(true, has_trivial_copy<volatile int>::value)
value_test(true, has_trivial_copy<int[2]>::value)
value_test(true, has_trivial_copy<int[3][2]>::value)
value_test(true, has_trivial_copy<int[2][4][5][6][3]>::value)
value_test(true, has_trivial_copy<f1>::value)
value_test(true, has_trivial_copy<mf2>::value)
value_test(false, has_trivial_copy<UDT>::value)
value_test(true, has_trivial_copy<empty_UDT>::value)
value_test(true, has_trivial_copy<enum_UDT>::value)
value_test(true, has_trivial_assign<int>::value)
value_test(true, has_trivial_assign<int*>::value)
value_test(true, has_trivial_assign<int*const>::value)
value_test(true, has_trivial_assign<const int>::value)
// Steve: was 'false' -- should be 'true' via 3.9p3, 3.9p10
value_test(true, has_trivial_assign<volatile int>::value)
value_test(true, has_trivial_assign<int[2]>::value)
value_test(true, has_trivial_assign<int[3][2]>::value)
value_test(true, has_trivial_assign<int[2][4][5][6][3]>::value)
value_test(true, has_trivial_assign<f1>::value)
value_test(true, has_trivial_assign<mf2>::value)
value_test(false, has_trivial_assign<UDT>::value)
value_test(true, has_trivial_assign<empty_UDT>::value)
value_test(true, has_trivial_assign<enum_UDT>::value)
value_test(true, has_trivial_destructor<int>::value)
value_test(true, has_trivial_destructor<int*>::value)
value_test(true, has_trivial_destructor<int*const>::value)
value_test(true, has_trivial_destructor<const int>::value)
value_test(true, has_trivial_destructor<volatile int>::value)
value_test(true, has_trivial_destructor<int[2]>::value)
value_test(true, has_trivial_destructor<int[3][2]>::value)
value_test(true, has_trivial_destructor<int[2][4][5][6][3]>::value)
value_test(true, has_trivial_destructor<f1>::value)
value_test(true, has_trivial_destructor<mf2>::value)
value_test(false, has_trivial_destructor<UDT>::value)
value_test(false, has_trivial_destructor<empty_UDT>::value)
value_test(true, has_trivial_destructor<enum_UDT>::value)
value_test(true, is_POD<int>::value)
value_test(true, is_POD<int*>::value)
// Steve: was 'true', should be 'false', via 3.9p10
value_test(false, is_POD<int&>::value)
value_test(true, is_POD<int*const>::value)
value_test(true, is_POD<const int>::value)
// Steve: was 'false', should be 'true', via 3.9p10
value_test(true, is_POD<volatile int>::value)
// Steve: was 'true', should be 'false', via 3.9p10
value_test(false, is_POD<const int&>::value)
value_test(true, is_POD<int[2]>::value)
value_test(true, is_POD<int[3][2]>::value)
value_test(true, is_POD<int[2][4][5][6][3]>::value)
value_test(true, is_POD<f1>::value)
value_test(true, is_POD<mf2>::value)
value_test(false, is_POD<UDT>::value)
value_test(false, is_POD<empty_UDT>::value)
value_test(true, is_POD<enum_UDT>::value)
value_test(true, (boost::is_convertible<implicitly_convertible_to_int,
int>::value));
value_test(true, (boost::is_convertible<Derived,Base>::value));
value_test(true, (boost::is_convertible<Derived,Derived>::value));
value_test(true, (boost::is_convertible<Base,Base>::value));
value_test(false, (boost::is_convertible<Base,Derived>::value));
value_test(true, (boost::is_convertible<Derived,Derived>::value));
value_test(false, (boost::is_convertible<NonDerived,Base>::value));
value_test(false, (boost::is_convertible<boost::noncopyable, int>::value));
value_test(true, (boost::is_convertible<float,int>::value));
#if defined(BOOST_MSVC6_MEMBER_TEMPLATES) || !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
value_test(false, (boost::is_convertible<float,void>::value));
value_test(false, (boost::is_convertible<void,float>::value));
value_test(true, (boost::is_convertible<void,void>::value));
#endif
value_test(true, (boost::is_convertible<enum1, int>::value));
value_test(true, (boost::is_convertible<Derived*, Base*>::value));
value_test(false, (boost::is_convertible<Base*, Derived*>::value));
value_test(true, (boost::is_convertible<Derived&, Base&>::value));
value_test(false, (boost::is_convertible<Base&, Derived&>::value));
value_test(true, (boost::is_convertible<const Derived*, const Base*>::value));
value_test(false, (boost::is_convertible<const Base*, const Derived*>::value));
value_test(true, (boost::is_convertible<const Derived&, const Base&>::value));
value_test(false, (boost::is_convertible<const Base&, const Derived&>::value));
value_test(false, (boost::is_convertible<const int *, int*>::value));
value_test(false, (boost::is_convertible<const int&, int&>::value));
value_test(true, (boost::is_convertible<int*, int[2]>::value));
value_test(false, (boost::is_convertible<const int*, int[3]>::value));
value_test(true, (boost::is_convertible<const int&, int>::value));
value_test(true, (boost::is_convertible<int(&)[4], const int*>::value));
value_test(true, (boost::is_convertible<int(&)(int), int(*)(int)>::value));
value_test(true, (boost::is_convertible<int *, const int*>::value));
value_test(true, (boost::is_convertible<int&, const int&>::value));
value_test(true, (boost::is_convertible<int[2], int*>::value));
value_test(true, (boost::is_convertible<int[2], const int*>::value));
value_test(false, (boost::is_convertible<const int[2], int*>::value));
align_test(int);
align_test(char);
align_test(double);
align_test(int[4]);
align_test(int(*)(int));
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
align_test(char&);
align_test(char (&)(int));
align_test(char(&)[4]);
#endif
align_test(int*);
//align_test(const int);
align_test(VB);
align_test(VD);
std::cout << std::endl << test_count << " tests completed (" << failures << " failures)";
return failures;
}

View File

@ -1,114 +0,0 @@
// boost::compressed_pair test program
// (C) Copyright John Maddock 2000. Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// common test code for type_traits_test.cpp/call_traits_test.cpp/compressed_pair_test.cpp
#ifndef BOOST_TYPE_TRAITS_TEST_HPP
#define BOOST_TYPE_TRAITS_TEST_HPP
// Variable declarations must come before test_align due to two-phase lookup
unsigned failures = 0;
unsigned test_count = 0;
//
// this one is here just to suppress warnings:
//
template <class T>
bool do_compare(T i, T j)
{
return i == j;
}
//
// this one is to verify that a constant is indeed a
// constant-integral-expression:
//
template <int>
struct ct_checker
{
};
#define BOOST_DO_JOIN( X, Y ) BOOST_DO_JOIN2(X,Y)
#define BOOST_DO_JOIN2(X, Y) X##Y
#define BOOST_JOIN( X, Y ) BOOST_DO_JOIN( X, Y )
#ifdef BOOST_MSVC
#define value_test(v, x) ++test_count;\
{typedef ct_checker<(x)> this_is_a_compile_time_check_;}\
if(!do_compare((int)v,(int)x)){++failures; std::cout << "checking value of " << #x << "...failed" << std::endl;}
#else
#define value_test(v, x) ++test_count;\
typedef ct_checker<(x)> BOOST_JOIN(this_is_a_compile_time_check_, __LINE__);\
if(!do_compare((int)v,(int)x)){++failures; std::cout << "checking value of " << #x << "...failed" << std::endl;}
#endif
#define value_fail(v, x) ++test_count; ++failures; std::cout << "checking value of " << #x << "...failed" << std::endl;
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
#define type_test(v, x) ++test_count;\
if(do_compare(boost::is_same<v, x>::value, false)){\
++failures; \
std::cout << "checking type of " << #x << "...failed" << std::endl; \
std::cout << " expected type was " << #v << std::endl; \
std::cout << " " << typeid(boost::is_same<v, x>).name() << "::value is false" << std::endl; }
#else
#define type_test(v, x) ++test_count;\
if(typeid(v) != typeid(x)){\
++failures; \
std::cout << "checking type of " << #x << "...failed" << std::endl; \
std::cout << " expected type was " << #v << std::endl; \
std::cout << " " << "typeid(" #v ") != typeid(" #x ")" << std::endl; }
#endif
template <class T>
struct test_align
{
struct padded
{
char c;
T t;
};
static void do_it()
{
padded p;
unsigned a = reinterpret_cast<char*>(&(p.t)) - reinterpret_cast<char*>(&p);
value_test(a, boost::alignment_of<T>::value);
}
};
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
template <class T>
struct test_align<T&>
{
static void do_it()
{
//
// we can't do the usual test because we can't take the address
// of a reference, so check that the result is the same as for a
// pointer type instead:
value_test(boost::alignment_of<T*>::value, boost::alignment_of<T&>::value);
}
};
#endif
#define align_test(T) test_align<T>::do_it()
//
// define tests here
//
// turn off some warnings:
#ifdef __BORLANDC__
#pragma option -w-8004
#endif
#ifdef BOOST_MSVC
#pragma warning (disable: 4018)
#endif
#endif // BOOST_TYPE_TRAITS_TEST_HPP

View File

@ -16,10 +16,53 @@
<h2>Contents</h2>
<ul>
<li>Class templates supporting the <a href="base_from_member.html">base-from-member
idiom</a></li>
<li>Function templates <a href="#checked_delete">checked_delete() and
checked_array_delete()</a></li>
<li>Function templates <a href="#functions next">next() and prior()</a></li>
<li>Class <a href="#Class noncopyable">noncopyable</a></li>
<li>Function template <a href="#addressof">addressof()</a></li>
<li>Function template <a href="tie.html">tie()</a> and supporting class tied.</li>
</ul>
<h2> Function templates <a name="checked_delete">checked_delete</a>() and
checked_array_delete()</h2>
<p>Deletion of a pointer to an incomplete type is an unsafe programming practice
because there is no way for the compiler to verify that the destructor is indeed
trivial.&nbsp; The checked_delete() and checked_array_delete() function
templates simply <b>delete</b> or <b>delete[]</b> their argument, but also
require that their argument be a complete type.&nbsp; They issue an appropriate
compiler error diagnostic if that requirement is not met.&nbsp; A typical
implementation is shown; other implementations may vary:</p>
<pre> template&lt; typename T &gt;
inline void checked_delete(T const volatile * x)
{
BOOST_STATIC_ASSERT( sizeof(T) ); // assert type complete at point
// of instantiation
delete x;
}
template&lt; typename T &gt;
inline void checked_array_delete(T const volatile * x)
{
BOOST_STATIC_ASSERT( sizeof(T) ); // assert type complete at point
// of instantiation
delete [] x;
}</pre>
<p>Contributed by Beman Dawes, based on a suggestion from Dave Abrahams,
generalizing an idea from Vladimir Prus, with comments from Rainer Deyke, John
Maddock, and others.</p>
<h3>Background</h3>
<p>The C++ Standard specifies that delete on a pointer to an incomplete types is
undefined behavior if the type has a non-trivial destructor in&nbsp; [expr.delete]
5.3.5 paragraph.&nbsp; No diagnostic is required.&nbsp; Some but not all
compilers issue warnings if the type is incomplete at point of deletion.</p>
<h2> <a name="functions next">Function</a> templates next() and prior()</h2>
<p>Certain data types, such as the C++ Standard Library's forward and
@ -81,7 +124,7 @@ CodeWarrior 5.0, and Microsoft Visual C++ 6.0 sp 3.</p>
<pre>// inside one of your own headers ...
#include &lt;boost/utility.hpp&gt;
class ResourceLadenFileSystem : noncopyable {
class ResourceLadenFileSystem : boost::noncopyable {
...</pre>
</blockquote>
@ -91,9 +134,55 @@ emphasize that it is to be used only as a base class.&nbsp; Dave Abrahams notes
concern about the effect on compiler optimization of adding (even trivial inline)
destructor declarations. He says &quot;Probably this concern is misplaced, because
noncopyable will be used mostly for classes which own resources and thus have non-trivial destruction semantics.&quot;</p>
<h2><a name="addressof">Function template addressof()</a></h2>
<p>Function <strong>addressof()</strong> returns the address of an object.</p>
<blockquote>
<pre>
template &lt;typename T&gt; inline T* addressof(T& v);
template &lt;typename T&gt; inline const T* addressof(const T& v);
template &lt;typename T&gt; inline volatile T* addressof(volatile T& v);
template &lt;typename T&gt; inline const volatile T* addressof(const volatile T& v);
</pre>
</blockquote>
<p>C++ allows programmers to replace the unary
<strong>operator&()</strong> class member used to get the address of
an object. Getting the real address of an object requires ugly
casting tricks to avoid invoking the overloaded
<strong>operator&()</strong>. Function <strong>addressof()</strong>
provides a wrapper around the necessary code to make it easy to get an
object's real address.
</p>
<p>The program <a href="addressof_test.cpp">addressof_test.cpp</a> can be
used to verify that <b>addressof()</b> works as expected.</p>
<p>Contributed by Brad King based on ideas from discussion with Doug Gregor.</p>
<h3>Example</h3>
<blockquote>
<pre>#include &lt;boost/utility.hpp&gt;
struct useless_type {};
class nonaddressable {
useless_type operator&() const;
};
void f() {
nonaddressable x;
nonaddressable* xp = boost::addressof(x);
// nonaddressable* xpe = &amp;x; /* error */
}</pre>
</blockquote>
<h2>Class templates for the Base-from-Member Idiom</h2>
<p>See <a href="base_from_member.html">separate documentation</a>.</p>
<h2>Function template tie()</h2>
<p>See <a href="tie.html">separate documentation</a>.</p>
<hr>
<p>Revised&nbsp; <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan
-->28 September, 2000<!--webbot bot="Timestamp" endspan i-checksum="39343"
-->10 September, 2001<!--webbot bot="Timestamp" endspan i-checksum="39328"
-->
</p>
<p><EFBFBD> Copyright boost.org 1999. Permission to copy, use, modify, sell and