diff --git a/doc/errinfo_api_function.html b/doc/errinfo_api_function.html index 7f3c0c4..5071481 100644 --- a/doc/errinfo_api_function.html +++ b/doc/errinfo_api_function.html @@ -30,7 +30,53 @@ boost typedef error_info<struct errinfo_api_function_,int> errinfo_api_function; }

This type is designed to be used as a standard error_info instance for transporting the name of a relevant API function (which does not use exceptions to report errors) in exceptions deriving from boost::exception.

-
+

Example:

+
#include <boost/exception/errinfo_api_function.hpp>
+#include <boost/exception/errinfo_at_line.hpp>
+#include <boost/exception/errinfo_errno.hpp>
+#include <boost/exception/errinfo_file_handle.hpp>
+#include <boost/exception/errinfo_file_name.hpp>
+#include <boost/exception/errinfo_file_open_mode.hpp>
+#include <boost/exception/info.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <stdio.h>
+#include <errno.h>
+#include <exception>
+
+struct error : virtual std::exception, virtual boost::exception { };
+struct file_error : virtual error { };
+struct file_open_error: virtual file_error { };
+struct file_read_error: virtual file_error { };
+
+boost::shared_ptr<FILE>
+open_file( char const * file, char const * mode )
+    {
+    if( FILE * f=fopen(file,mode) )
+        return boost::shared_ptr<FILE>(f,fclose);
+    else
+        BOOST_THROW_EXCEPTION(
+            file_open_error() <<
+            boost::errinfo_api_function("fopen") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_name(file) <<
+            boost::errinfo_file_open_mode(mode) );
+    }
+
+size_t
+read_file( boost::shared_ptr<FILE> const & f, void * buf, size_t size )
+    {
+    size_t nr=fread(buf,1,size,f.get());
+    if( ferror(f.get()) )
+        BOOST_THROW_EXCEPTION(
+            file_read_error() <<
+            boost::errinfo_api_function("fread") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_handle(f) );
+    return nr;
+    }
+

See Also:

boost/exception/errinfo_api_function.hpp
Frequently Asked Questions
diff --git a/doc/errinfo_at_line.html b/doc/errinfo_at_line.html index b3d8cf0..351c8a3 100644 --- a/doc/errinfo_at_line.html +++ b/doc/errinfo_at_line.html @@ -30,7 +30,53 @@ boost typedef error_info<struct errinfo_at_line_,int> errinfo_at_line; }

This type is designed to be used as a standard error_info instance for transporting a relevant text file line number, for example in parse error exceptions deriving from boost::exception.

-
+

Example:

+
#include <boost/exception/errinfo_api_function.hpp>
+#include <boost/exception/errinfo_at_line.hpp>
+#include <boost/exception/errinfo_errno.hpp>
+#include <boost/exception/errinfo_file_handle.hpp>
+#include <boost/exception/errinfo_file_name.hpp>
+#include <boost/exception/errinfo_file_open_mode.hpp>
+#include <boost/exception/info.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <stdio.h>
+#include <errno.h>
+#include <exception>
+
+struct error : virtual std::exception, virtual boost::exception { };
+struct file_error : virtual error { };
+struct file_open_error: virtual file_error { };
+struct file_read_error: virtual file_error { };
+
+boost::shared_ptr<FILE>
+open_file( char const * file, char const * mode )
+    {
+    if( FILE * f=fopen(file,mode) )
+        return boost::shared_ptr<FILE>(f,fclose);
+    else
+        BOOST_THROW_EXCEPTION(
+            file_open_error() <<
+            boost::errinfo_api_function("fopen") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_name(file) <<
+            boost::errinfo_file_open_mode(mode) );
+    }
+
+size_t
+read_file( boost::shared_ptr<FILE> const & f, void * buf, size_t size )
+    {
+    size_t nr=fread(buf,1,size,f.get());
+    if( ferror(f.get()) )
+        BOOST_THROW_EXCEPTION(
+            file_read_error() <<
+            boost::errinfo_api_function("fread") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_handle(f) );
+    return nr;
+    }
+

See Also:

boost/exception/errinfo_at_line.hpp
diff --git a/doc/errinfo_errno.html b/doc/errinfo_errno.html index 8fd96e2..7d85257 100644 --- a/doc/errinfo_errno.html +++ b/doc/errinfo_errno.html @@ -31,7 +31,53 @@ boost typedef error_info<struct errinfo_errno_,int> errinfo_errno; }

This type is designed to be used as a standard error_info instance for transporting a relevant errno value in exceptions deriving from boost::exception.

-
+

Example:

+
#include <boost/exception/errinfo_api_function.hpp>
+#include <boost/exception/errinfo_at_line.hpp>
+#include <boost/exception/errinfo_errno.hpp>
+#include <boost/exception/errinfo_file_handle.hpp>
+#include <boost/exception/errinfo_file_name.hpp>
+#include <boost/exception/errinfo_file_open_mode.hpp>
+#include <boost/exception/info.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <stdio.h>
+#include <errno.h>
+#include <exception>
+
+struct error : virtual std::exception, virtual boost::exception { };
+struct file_error : virtual error { };
+struct file_open_error: virtual file_error { };
+struct file_read_error: virtual file_error { };
+
+boost::shared_ptr<FILE>
+open_file( char const * file, char const * mode )
+    {
+    if( FILE * f=fopen(file,mode) )
+        return boost::shared_ptr<FILE>(f,fclose);
+    else
+        BOOST_THROW_EXCEPTION(
+            file_open_error() <<
+            boost::errinfo_api_function("fopen") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_name(file) <<
+            boost::errinfo_file_open_mode(mode) );
+    }
+
+size_t
+read_file( boost::shared_ptr<FILE> const & f, void * buf, size_t size )
+    {
+    size_t nr=fread(buf,1,size,f.get());
+    if( ferror(f.get()) )
+        BOOST_THROW_EXCEPTION(
+            file_read_error() <<
+            boost::errinfo_api_function("fread") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_handle(f) );
+    return nr;
+    }
+

See Also:

boost/exception/errinfo_errno.hpp
Frequently Asked Questions
diff --git a/doc/errinfo_file_handle.html b/doc/errinfo_file_handle.html index 164a14b..6635c9d 100644 --- a/doc/errinfo_file_handle.html +++ b/doc/errinfo_file_handle.html @@ -31,7 +31,53 @@ boost typedef error_info<struct errinfo_file_handle_,weak_ptr<FILE> > errinfo_file_handle; }

This type is designed to be used as a standard error_info instance for transporting a relevant FILE pointer managed by a boost::shared_ptr<FILE> in exceptions deriving from boost::exception.

-
+

Example:

+
#include <boost/exception/errinfo_api_function.hpp>
+#include <boost/exception/errinfo_at_line.hpp>
+#include <boost/exception/errinfo_errno.hpp>
+#include <boost/exception/errinfo_file_handle.hpp>
+#include <boost/exception/errinfo_file_name.hpp>
+#include <boost/exception/errinfo_file_open_mode.hpp>
+#include <boost/exception/info.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <stdio.h>
+#include <errno.h>
+#include <exception>
+
+struct error : virtual std::exception, virtual boost::exception { };
+struct file_error : virtual error { };
+struct file_open_error: virtual file_error { };
+struct file_read_error: virtual file_error { };
+
+boost::shared_ptr<FILE>
+open_file( char const * file, char const * mode )
+    {
+    if( FILE * f=fopen(file,mode) )
+        return boost::shared_ptr<FILE>(f,fclose);
+    else
+        BOOST_THROW_EXCEPTION(
+            file_open_error() <<
+            boost::errinfo_api_function("fopen") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_name(file) <<
+            boost::errinfo_file_open_mode(mode) );
+    }
+
+size_t
+read_file( boost::shared_ptr<FILE> const & f, void * buf, size_t size )
+    {
+    size_t nr=fread(buf,1,size,f.get());
+    if( ferror(f.get()) )
+        BOOST_THROW_EXCEPTION(
+            file_read_error() <<
+            boost::errinfo_api_function("fread") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_handle(f) );
+    return nr;
+    }
+

See Also:

boost/exception/errinfo_file_handle.hpp
diff --git a/doc/errinfo_file_name.html b/doc/errinfo_file_name.html index f3a3ed6..6abfc32 100644 --- a/doc/errinfo_file_name.html +++ b/doc/errinfo_file_name.html @@ -31,7 +31,53 @@ boost typedef error_info<struct errinfo_file_name_,std::string> errinfo_file_name; }

This type is designed to be used as a standard error_info instance for transporting a relevant file name in exceptions deriving from boost::exception.

-
+

Example:

+
#include <boost/exception/errinfo_api_function.hpp>
+#include <boost/exception/errinfo_at_line.hpp>
+#include <boost/exception/errinfo_errno.hpp>
+#include <boost/exception/errinfo_file_handle.hpp>
+#include <boost/exception/errinfo_file_name.hpp>
+#include <boost/exception/errinfo_file_open_mode.hpp>
+#include <boost/exception/info.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <stdio.h>
+#include <errno.h>
+#include <exception>
+
+struct error : virtual std::exception, virtual boost::exception { };
+struct file_error : virtual error { };
+struct file_open_error: virtual file_error { };
+struct file_read_error: virtual file_error { };
+
+boost::shared_ptr<FILE>
+open_file( char const * file, char const * mode )
+    {
+    if( FILE * f=fopen(file,mode) )
+        return boost::shared_ptr<FILE>(f,fclose);
+    else
+        BOOST_THROW_EXCEPTION(
+            file_open_error() <<
+            boost::errinfo_api_function("fopen") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_name(file) <<
+            boost::errinfo_file_open_mode(mode) );
+    }
+
+size_t
+read_file( boost::shared_ptr<FILE> const & f, void * buf, size_t size )
+    {
+    size_t nr=fread(buf,1,size,f.get());
+    if( ferror(f.get()) )
+        BOOST_THROW_EXCEPTION(
+            file_read_error() <<
+            boost::errinfo_api_function("fread") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_handle(f) );
+    return nr;
+    }
+

See Also:

boost/exception/errinfo_file_name.hpp
Frequently Asked Questions
diff --git a/doc/errinfo_file_open_mode.html b/doc/errinfo_file_open_mode.html index 3a1bc9b..74b0d79 100644 --- a/doc/errinfo_file_open_mode.html +++ b/doc/errinfo_file_open_mode.html @@ -31,7 +31,53 @@ boost typedef error_info<struct errinfo_file_open_mode_,std::string> errinfo_file_open_mode; }

This type is designed to be used as a standard error_info instance for transporting the string passed as a second argument to fopen in exceptions indicating fopen failures and deriving from boost::exception.

-
+

Example:

+
#include <boost/exception/errinfo_api_function.hpp>
+#include <boost/exception/errinfo_at_line.hpp>
+#include <boost/exception/errinfo_errno.hpp>
+#include <boost/exception/errinfo_file_handle.hpp>
+#include <boost/exception/errinfo_file_name.hpp>
+#include <boost/exception/errinfo_file_open_mode.hpp>
+#include <boost/exception/info.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <stdio.h>
+#include <errno.h>
+#include <exception>
+
+struct error : virtual std::exception, virtual boost::exception { };
+struct file_error : virtual error { };
+struct file_open_error: virtual file_error { };
+struct file_read_error: virtual file_error { };
+
+boost::shared_ptr<FILE>
+open_file( char const * file, char const * mode )
+    {
+    if( FILE * f=fopen(file,mode) )
+        return boost::shared_ptr<FILE>(f,fclose);
+    else
+        BOOST_THROW_EXCEPTION(
+            file_open_error() <<
+            boost::errinfo_api_function("fopen") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_name(file) <<
+            boost::errinfo_file_open_mode(mode) );
+    }
+
+size_t
+read_file( boost::shared_ptr<FILE> const & f, void * buf, size_t size )
+    {
+    size_t nr=fread(buf,1,size,f.get());
+    if( ferror(f.get()) )
+        BOOST_THROW_EXCEPTION(
+            file_read_error() <<
+            boost::errinfo_api_function("fread") <<
+            boost::errinfo_errno(errno) <<
+            boost::errinfo_file_handle(f) );
+    return nr;
+    }
+

See Also:

boost/exception/errinfo_file_open_mode.hpp
Frequently Asked Questions
diff --git a/doc/source/boost-exception.reno b/doc/source/boost-exception.reno index 69db62a..b2d4bf9 100644 --- a/doc/source/boost-exception.reno +++ b/doc/source/boost-exception.reno @@ -39,7 +39,7 @@ - 72 + 73 0 @@ -53,29 +53,18 @@ - 2 - 126BB1D8971585CBE7D78EF3C12259D72FD5E973A84626AA9FC3234220A11CAB - 3471702891 - 969 - 344 - A7FD310E1340E103081DA2A7899DA0E213C696C84D52C17ADA09F6942EE97D47 - 2978648279 - 530 - 433 + 0 - 0 - ../../../../boost/exception/detail/error_info_impl.hpp - 0 - 0 + 1 - <string>error_info</string> + <string>using virtual inheritance in exception types</string> @@ -102,33 +91,29 @@ - 3 - DA1CAA5F6BAB712AD89E8A0B7D83961FCE4AF9FD198791C9F6EA299800A64FAC - 3553871704 - 612 - 1496 - 154AC930BD1FDCADE24CDB07DBD3163CA26378AF4F1D428C34B67D1F68A60891 - 50905072 - 586 - 23 - CD1241D84950468704F3C3F04116B8DA5162A8BEA4364F10951232F49113C5DE - 1658463867 - 121 - 453 + 2 + 625285100233119FB4542EB54530FC7CB802D9A50B06D6CFB397730CDB1ED7D8 + 4080542391 + 9174 + 323 + F3FB15CD82336271C6E875BC620385322777D16F0B7C233300783CE35710CCBF + 3292878997 + 282 + 7287 0 - 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61 + 41 reno_context @@ -2607,68 +1686,29 @@ - 1 - FC684D0DD5A9732B4130F2AB3DB6E0491D0F523E14B7FB738B2019EA2C7F8717 - 2229778754 - 631 - 319 + 2 + F7633FDCF6615C0199645701EE6E7ACE5CBCD7A7CF6838573791E91ABB3C09F2 + 1668435395 + 1332 + 396 + A1F443AF571973A12005D2F7D4AE09A32AAF686FEEAE272EC21512A65EB943E8 + 3879093659 + 1300 + 26 0 - ../../example/cloning_2.cpp + ../../../../boost/exception/info_tuple.hpp 0 0 - <string>cloning and re-throwing an exception</string> - - - cloning_and_rethrowing - - - - - - 0 - - - - - 0 - - 62 - - reno_context - - - - - - - 1 - 2F432507CFD796BE673F33D9AC68C535F1ED1F4FCD3A8E3AEEC320D9795FB4AE - 2319362875 - 2574 - 323 - - - - - - 0 - ../../../../boost/exception/get_error_info.hpp - 0 - 0 - - - - - <string>boost/exception/get_error_info.hpp</string> + <string>tuple/operator<<</string> @@ -2686,45 +1726,7 @@ 0 - 63 - - reno_context - - - - - - - 0 - - - - - - 1 - - - - - <string>transporting of exceptions between threads</string> - - - tutorial_exception_ptr - - - - - - 1 - 2 - (:include include:) (:auto also:) - - - - - 0 - - 64 + 42 reno_context @@ -2777,7 +1779,7 @@ 0 - 65 + 43 reno_context @@ -2787,28 +1789,28 @@ 2 - CEB9022E39DA32E612158FF553D383E13D300D1202CEB754E28B716040EFC414 - 1114955626 - 11770 - 723 - 6B3B617AC518A2177BDB89656E726B4E4D79577E289130493A61BAE24FB64838 - 3173127726 - 1101 - 2184 + AED5E79246B32BDF0E5C6CD8BDDC3370FD0BA1EFE3D4CE76C4A6D36A123F2E20 + 228982966 + 3918 + 518 + D31BCE814DF5B8B718E7EB67A194AD08EF716A26D422E436596ABA1F145007D8 + 4055211476 + 525 + 3387 0 - ../../../../boost/exception_ptr.hpp + ../../../../boost/exception/info.hpp 0 0 - <string>unknown_exception</string> + <string>exception/operator<<</string> @@ -2826,7 +1828,261 @@ 0 - 66 + 44 + + reno_context + + + + + + + 0 + + + + + + 1 + + + + + <string>boost exception</string> + + + boost-exception + + + + + + 1 + 2 + (:include include:) + + + + + 0 + + 45 + + reno_context + + + + + + + 0 + + + + + + 1 + + + + + <string>Motivation</string> + + + motivation + + + + + + 7 + 2 + (:include include:) (:auto also explicit=" + 1 + + 0 + + 46 + + reno_context + + + + + + + 0 + + + + + + 1 + + + + + <string>exception types as simple semantic tags</string> + + + + + + + + 2 + + 1 + + 0 + + 47 + + reno_context + + + + + + + 1 + C95CEF2E9D0BAA1E950509471062916DB849A46A19F7692BA478030E79B338EB + 1917376632 + 706 + 408 + + + + + + 0 + ../../example/enable_error_info.cpp + 0 + 0 + + + + + <string>integrating boost exception in existing exception class hierarchies</string> + + + tutorial_enable_error_info + + + + + 2 + + 1 + + 0 + + -15 + + + 2 + ":) + + + + + 0 + + 48 + + reno_context + + + + + + + 2 + 126A895281064E2195458B8A47CD73DB7E3BE3608F250925E07AF4230CBDDE1D + 4231421785 + 307 + 344 + 16179B125E2BC6D993FBE4BA5E9A96DBAE43CA1443C7D281B659D020B6725983 + 1126376090 + 92 + 209 + + + + + + 0 + ../../../../boost/exception/errinfo_type_info_name.hpp + 0 + 0 + + + + + <string>errinfo_type_info_name</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 49 + + reno_context + + + + + + + 1 + 04DDC793002AFCF4F4166D250C67D09B6FE8B86224318ED7847AD6EC423B70CA + 922651615 + 433 + 1061 + + + + + + 0 + ../../../../boost/throw_exception.hpp + 0 + 0 + + + + + <string>BOOST_THROW_EXCEPTION</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 50 reno_context @@ -2875,7 +2131,20 @@ 0 - 67 + -46 + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 51 reno_context @@ -2885,71 +2154,24 @@ 1 - D194983FA4C182AB869F1AB542797B3EDCCBAEB0A6E67B2DCEE5EA2C7F58853C - 1308852571 - 395 - 307 + 2CCD2A79129C832AB12435E43BB35DE67318A8940A36530EF83C5E617987D661 + 2091122505 + 699 + 323 0 - ../../example/cloning_1.cpp + ../../../../boost/exception/all.hpp 0 0 - <string>using enable_current_exception at the time of the throw</string> - - - using_enable_cloning - - - - - - 0 - - - - - 0 - - 68 - - reno_context - - - - - - - 2 - F7633FDCF6615C0199645701EE6E7ACE5CBCD7A7CF6838573791E91ABB3C09F2 - 1668435395 - 1332 - 396 - A1F443AF571973A12005D2F7D4AE09A32AAF686FEEAE272EC21512A65EB943E8 - 3879093659 - 1300 - 26 - - - - - - 0 - ../../../../boost/exception/info_tuple.hpp - 0 - 0 - - - - - <string>tuple/operator<<</string> + <string>boost/exception/all.hpp</string> @@ -2967,7 +2189,7 @@ 0 - 69 + 52 reno_context @@ -2987,7 +2209,7 @@ - <string>using virtual inheritance in exception types</string> + <string>boost/exception/enable_error_info.hpp</string> @@ -3005,7 +2227,7 @@ 0 - 70 + 53 reno_context @@ -3014,41 +2236,60 @@ - 1 - 977045132A532A0071B0B53F737D85367CE9A331402F96790E45B3B6F2FC88A6 - 1875939463 - 529 - 382 + 2 + CEB9022E39DA32E612158FF553D383E13D300D1202CEB754E28B716040EFC414 + 1114955626 + 11770 + 723 + AF894656AC8CED6190EEEE08B051DBF2106A393E313BB5BB1C17D4808EFED761 + 1496105832 + 1753 + 429 0 - ../../example/error_info_1.cpp + ../../../../boost/exception_ptr.hpp 0 0 - <string>adding of arbitrary data at the point of the throw</string> + <string>exception_ptr</string> - adding_data_at_throw + - 0 + 1 + 2 + (:include include:) (:auto also:) 0 - 71 + -47 + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 54 reno_context @@ -3058,9 +2299,201 @@ 1 - 283AE6BE0920B1882100C426958FDF998DEE10226546B300B45C1A26B242FC25 - 722381934 - 617 + A95165313334B684C85659D05D3D8EB17F4AF552EDCB3C180AC1F85D18C99CBF + 115507474 + 2037 + 91 + + + + + + 0 + ../../../../boost/throw_exception.hpp + 0 + 0 + + + + + <string>boost/throw_exception.hpp</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 55 + + reno_context + + + + + + + 2 + 307034E20863A00923777A60D9495B4076B7F917D5B97203025299060F0833E0 + 3948311309 + 396 + 344 + F8ED2052577830AC0C515EC5932BB14445DD5DA714782281FCDB1776961FECB1 + 3880328768 + 82 + 308 + + + + + + 0 + ../../../../boost/exception/errinfo_file_name.hpp + 0 + 0 + + + + + <string>errinfo_file_name</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 56 + + reno_context + + + + + + + 2 + FEABD2D011FBCE667D26BAD68A1C65D81E98DD40081CC70F2738AC3151A8FC4A + 4260129224 + 2393 + 504 + C708EDCAC3964E2F3C3A081700112C5F15C7BF7A61FDF2EF39D112FC9B987CE3 + 1739153824 + 2361 + 26 + + + + + + 0 + ../../../../boost/exception/get_error_info.hpp + 0 + 0 + + + + + <string>get_error_info</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 57 + + reno_context + + + + + + + 2 + DA1CAA5F6BAB712AD89E8A0B7D83961FCE4AF9FD198791C9F6EA299800A64FAC + 3553871704 + 612 + 1496 + 154AC930BD1FDCADE24CDB07DBD3163CA26378AF4F1D428C34B67D1F68A60891 + 50905072 + 586 + 23 + + + + + + 0 + ../../../../boost/throw_exception.hpp + 0 + 0 + + + + + <string>throw_exception</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 58 + + reno_context + + + + + + + 1 + DE766B811244919E8E1EA54FC747A8487BCE57F1AB592932640FC90428B617A5 + 414875037 + 427 323 @@ -3068,14 +2501,14 @@ 0 - ../../../../boost/exception/errinfo_errno.hpp + ../../../../boost/exception/errinfo_file_open_mode.hpp 0 0 - <string>boost/exception/errinfo_errno.hpp</string> + <string>boost/exception/errinfo_file_open_mode.hpp</string> @@ -3093,7 +2526,7 @@ 0 - 72 + 59 reno_context @@ -3102,28 +2535,21 @@ - 1 - 625285100233119FB4542EB54530FC7CB802D9A50B06D6CFB397730CDB1ED7D8 - 4080542391 - 9174 - 323 + 0 - 0 - ../../../../boost/exception/exception.hpp - 0 - 0 + 1 - <string>boost/exception/exception.hpp</string> + <string>Macros</string> - + macros @@ -3138,7 +2564,7 @@ 0 - 73 + 60 reno_context @@ -3187,7 +2613,7 @@ 0 - 74 + 61 reno_context @@ -3236,7 +2662,140 @@ 0 - 75 + 62 + + reno_context + + + + + + + 1 + 977045132A532A0071B0B53F737D85367CE9A331402F96790E45B3B6F2FC88A6 + 1875939463 + 529 + 382 + + + + + + 0 + ../../example/error_info_1.cpp + 0 + 0 + + + + + <string>adding of arbitrary data at the point of the throw</string> + + + adding_data_at_throw + + + + + + 0 + + + + + 0 + + 63 + + reno_context + + + + + + + 1 + 283AE6BE0920B1882100C426958FDF998DEE10226546B300B45C1A26B242FC25 + 722381934 + 617 + 323 + + + + + + 0 + ../../../../boost/exception/errinfo_errno.hpp + 0 + 0 + + + + + <string>boost/exception/errinfo_errno.hpp</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 64 + + reno_context + + + + + + + 1 + 625285100233119FB4542EB54530FC7CB802D9A50B06D6CFB397730CDB1ED7D8 + 4080542391 + 9174 + 323 + + + + + + 0 + ../../../../boost/exception/exception.hpp + 0 + 0 + + + + + <string>boost/exception/exception.hpp</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 65 reno_context @@ -3285,7 +2844,7 @@ 0 - 76 + 66 reno_context @@ -3330,6 +2889,490 @@ (:include include:) (:auto also:) + + + 0 + + 67 + + reno_context + + + + + + + 2 + 126BB1D8971585CBE7D78EF3C12259D72FD5E973A84626AA9FC3234220A11CAB + 3471702891 + 969 + 344 + A7FD310E1340E103081DA2A7899DA0E213C696C84D52C17ADA09F6942EE97D47 + 2978648279 + 530 + 433 + + + + + + 0 + ../../../../boost/exception/detail/error_info_impl.hpp + 0 + 0 + + + + + <string>error_info</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 68 + + reno_context + + + + + + + 3 + DA1CAA5F6BAB712AD89E8A0B7D83961FCE4AF9FD198791C9F6EA299800A64FAC + 3553871704 + 612 + 1496 + 154AC930BD1FDCADE24CDB07DBD3163CA26378AF4F1D428C34B67D1F68A60891 + 50905072 + 586 + 23 + CD1241D84950468704F3C3F04116B8DA5162A8BEA4364F10951232F49113C5DE + 1658463867 + 121 + 453 + + + + + + 0 + ../../../../boost/throw_exception.hpp + 0 + 0 + + + + + <string>configuration macros</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 69 + + reno_context + + + + + + + 0 + + + + + + 1 + + + + + <string>transporting of arbitrary data to the catch site</string> + + + tutorial_transporting_data + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 70 + + reno_context + + + + + + + 1 + 66EFC83C830F0B00D0C9399B475099072E2674B3C694F9152645A33E3D7AC303 + 561674611 + 417 + 323 + + + + + + 0 + ../../../../boost/exception/errinfo_file_name.hpp + 0 + 0 + + + + + <string>boost/exception/errinfo_file_name.hpp</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 71 + + reno_context + + + + + + + 1 + 641BB230CEBF638811480BE0E3A96ABCB7CC9CC7E1C1A9C51FBAB296FFB6B7B1 + 4248389286 + 4113 + 323 + + + + + + 0 + ../../../../boost/exception/info.hpp + 0 + 0 + + + + + <string>boost/exception/info.hpp</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 72 + + reno_context + + + + + + + 1 + 4EDD3DF2332B6D9D22AC9AD90B850ACC715A24DD466E675014CBED25C63C255F + 4175717823 + 328 + 323 + + + + + + 0 + ../../../../boost/exception/errinfo_type_info_name.hpp + 0 + 0 + + + + + <string>boost/exception/errinfo_type_info_name.hpp</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 73 + + reno_context + + + + + + + 1 + CAD6C404CB725D336A44920D2341ECA131149AB02C368B59028F8147F16737BF + 2258638601 + 94 + 227 + + + + + + 0 + ../../../../boost/exception/info_tuple.hpp + 0 + 0 + + + + + <string>boost/exception/info_tuple.hpp</string> + + + + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 74 + + reno_context + + + + + + + 1 + 66E0BD9724AB83012F5B35D887E3313960DC0E69B94E0C03CA1F3C85A0D84A5C + 2883671483 + 311 + 306 + + + + + + 0 + ../../example/logging.cpp + 0 + 0 + + + + + <string>diagnostic information</string> + + + tutorial_diagnostic_information + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 75 + + reno_context + + + + + + + 0 + + + + + + 1 + + + + + <string>Synopsis</string> + + + synopsis + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 76 + + reno_context + + + + + + + 0 + + + + + + 1 + + + + + <string>Headers</string> + + + headers + + + + + + 1 + 2 + (:include include:) (:auto also:) + + + + + 0 + + 77 + + reno_context + + + + + + + 1 + F812D8AE60189369CED7A3FD72733A65B57D56637E6721867F52A82EB319731A + 3974553696 + 1432 + 352 + + + + + + 0 + ../../example/errinfos.cpp + 0 + 0 + + + + + <string>errinfos example</string> + + + + + + + + + 0 + + @@ -3337,13 +3380,13 @@ def - 77 + 78 reno_layer - 72 + 73 0 @@ -3352,45 +3395,7 @@ - 9 - 2 - [@template <class Tag,class T> class (:link - 1 - - 0 - - -5 - - - 2 - :) { public: (:include - 1 - - 0 - - -55 - - - 2 - decl pre_indent="4":) (:include - 1 - - 0 - - -29 - - - 2 - decl pre_indent="4":) (:include - 1 - - 0 - - -60 - - - 2 - decl pre_indent="4":) };@] + 0 @@ -3511,7 +3516,36 @@ - 0 + 7 + 2 + [@class (:link + 1 + + 0 + + -16 + + + 2 + :) { protected: (:include + 1 + + 0 + + -42 + + + 2 + decl pre_indent="4":) (:include + 1 + + 0 + + -11 + + + 2 + decl pre_indent="4":) };@] @@ -3610,27 +3644,7 @@ - 5 - 2 - [@typedef - 1 - - 0 - - -5 - - - 2 - <struct errinfo_file_name_,std::string> - 1 - - 0 - - -25 - - - 2 - ;@] + 0 @@ -3641,7 +3655,27 @@ - 0 + 5 + 2 + [@typedef + 1 + + 0 + + -67 + + + 2 + <struct errinfo_api_function_,int> + 1 + + 0 + + -26 + + + 2 + ;@] @@ -3685,36 +3719,7 @@ - 7 - 2 - [@class (:link - 1 - - 0 - - -30 - - - 2 - :) { protected: (:include - 1 - - 0 - - -64 - - - 2 - decl pre_indent="4":) (:include - 1 - - 0 - - -43 - - - 2 - decl pre_indent="4":) };@] + 0 @@ -3743,7 +3748,7 @@ 0 - -5 + -67 2 @@ -3800,7 +3805,27 @@ - 0 + 5 + 2 + [@typedef + 1 + + 0 + + -67 + + + 2 + <struct errinfo_file_handle_,weak_ptr<FILE> > + 1 + + 0 + + -36 + + + 2 + ;@] @@ -3906,18 +3931,7 @@ 0 - -46 - - - - 0 - - - - - 0 - - -47 + -48 @@ -3928,33 +3942,22 @@ 0 - -5 + -67 2 - <struct errinfo_api_function_,int> + <struct errinfo_type_info_name_,std::string> 1 0 - -47 + -48 2 ;@] - - - 0 - - -48 - - - - 0 - - 0 @@ -3977,6 +3980,17 @@ 0 + + + 0 + + -46 + + + + 0 + + 0 @@ -3996,27 +4010,7 @@ - 5 - 2 - [@typedef - 1 - - 0 - - -5 - - - 2 - <struct errinfo_type_info_name_,std::string> - 1 - - 0 - - -52 - - - 2 - ;@] + 0 @@ -4030,6 +4024,17 @@ 0 + + + 0 + + -47 + + + + 0 + + 0 @@ -4049,7 +4054,27 @@ - 0 + 5 + 2 + [@typedef + 1 + + 0 + + -67 + + + 2 + <struct errinfo_file_name_,std::string> + 1 + + 0 + + -55 + + + 2 + ;@] @@ -4093,27 +4118,7 @@ - 5 - 2 - [@typedef - 1 - - 0 - - -5 - - - 2 - <struct errinfo_file_handle_,weak_ptr<FILE> > - 1 - - 0 - - -59 - - - 2 - ;@] + 0 @@ -4179,7 +4184,27 @@ - 0 + 5 + 2 + [@typedef + 1 + + 0 + + -67 + + + 2 + <struct errinfo_at_line_,int> + 1 + + 0 + + -65 + + + 2 + ;@] @@ -4190,7 +4215,27 @@ - 0 + 5 + 2 + [@typedef + 1 + + 0 + + -67 + + + 2 + <struct errinfo_file_open_mode_,std::string> + 1 + + 0 + + -66 + + + 2 + ;@] @@ -4201,7 +4246,45 @@ - 0 + 9 + 2 + [@template <class Tag,class T> class (:link + 1 + + 0 + + -67 + + + 2 + :) { public: (:include + 1 + + 0 + + -30 + + + 2 + decl pre_indent="4":) (:include + 1 + + 0 + + -18 + + + 2 + decl pre_indent="4":) (:include + 1 + + 0 + + -40 + + + 2 + decl pre_indent="4":) };@] @@ -4289,27 +4372,7 @@ - 5 - 2 - [@typedef - 1 - - 0 - - -5 - - - 2 - <struct errinfo_at_line_,int> - 1 - - 0 - - -75 - - - 2 - ;@] + 0 @@ -4320,27 +4383,18 @@ - 5 - 2 - [@typedef - 1 - - 0 - - -5 - - - 2 - <struct errinfo_file_open_mode_,std::string> - 1 - - 0 - - -76 - - - 2 - ;@] + 0 + + + + + 0 + + -77 + + + + 0 @@ -4350,13 +4404,13 @@ api - 78 + 79 reno_layer - 72 + 73 0 @@ -4387,18 +4441,7 @@ - 3 - 2 - [@(:include - 1 - - 0 - - -25 - - - 2 - def:)@] + 0 @@ -4409,27 +4452,7 @@ - 5 - 2 - [@(:include - 1 - - 0 - - -5 - - - 2 - def:) (:include - 1 - - 0 - - -50 - - - 2 - decl:)@] + 0 @@ -4440,18 +4463,63 @@ - 3 + 13 2 [@(:include 1 0 - -52 + -31 2 - def:)@] + decl:) (:include + 1 + + 0 + + -8 + + + 2 + decl:) (:include + 1 + + 0 + + -53 + + + 2 + decl:) (:include + 1 + + 0 + + -13 + + + 2 + decl:) (:include + 1 + + 0 + + -17 + + + 2 + decl:) (:include + 1 + + 0 + + -33 + + + 2 + decl:)@] @@ -4473,18 +4541,7 @@ - 3 - 2 - [@(:include - 1 - - 0 - - -68 - - - 2 - decl:)@] + 0 @@ -4495,7 +4552,18 @@ - 0 + 3 + 2 + [@(:include + 1 + + 0 + + -65 + + + 2 + def:)@] @@ -4517,18 +4585,7 @@ - 3 - 2 - [@(:include - 1 - - 0 - - -75 - - - 2 - def:)@] + 0 @@ -4590,20 +4647,20 @@ 0 - -28 + -61 2 - decl:) namespace boost { (:include + decl:) (:include 1 0 - -35 + -50 2 - decl:) }@] + decl:)@] @@ -4647,7 +4704,18 @@ - 0 + 3 + 2 + [@(:include + 1 + + 0 + + -36 + + + 2 + def:)@] @@ -4658,27 +4726,7 @@ - 5 - 2 - [@(:include - 1 - - 0 - - -74 - - - 2 - decl:) (:include - 1 - - 0 - - -66 - - - 2 - decl:)@] + 0 @@ -4711,59 +4759,14 @@ - 13 + 3 2 [@(:include 1 0 - -65 - - - 2 - decl:) (:include - 1 - - 0 - - -20 - - - 2 - decl:) (:include - 1 - - 0 - - -17 - - - 2 - decl:) (:include - 1 - - 0 - - -37 - - - 2 - decl:) (:include - 1 - - 0 - - -22 - - - 2 - decl:) (:include - 1 - - 0 - - -36 + -56 2 @@ -4855,7 +4858,18 @@ - 0 + 3 + 2 + [@(:include + 1 + + 0 + + -22 + + + 2 + decl:)@] @@ -4877,7 +4891,18 @@ - 0 + 3 + 2 + [@(:include + 1 + + 0 + + -28 + + + 2 + decl:)@] @@ -4898,156 +4923,6 @@ -39 - - 0 - - - - - 0 - - -40 - - - - 29 - 2 - [@#include <(:link - 1 - - 0 - - -24 - - - 2 - :)> #include <(:link - 1 - - 0 - - -73 - - - 2 - :)> #include <(:link - 1 - - 0 - - -72 - - - 2 - :)> #include <(:link - 1 - - 0 - - -62 - - - 2 - :)> #include <(:link - 1 - - 0 - - -8 - - - 2 - :)> #include <(:link - 1 - - 0 - - -11 - - - 2 - :)> #include <(:link - 1 - - 0 - - -27 - - - 2 - :)> #include <(:link - 1 - - 0 - - -58 - - - 2 - :)> #include <(:link - 1 - - 0 - - -14 - - - 2 - :)> #include <(:link - 1 - - 0 - - -71 - - - 2 - :)> #include <(:link - 1 - - 0 - - -53 - - - 2 - :)> #include <(:link - 1 - - 0 - - -7 - - - 2 - :)> #include <(:link - 1 - - 0 - - -41 - - - 2 - :)> #include <(:link - 1 - - 0 - - -9 - - - 2 - :)>@] - - - - - 0 - - -41 - - 3 2 @@ -5056,13 +4931,35 @@ 0 - -76 + -26 2 def:)@] + + + 0 + + -40 + + + + 0 + + + + + 0 + + -41 + + + + 0 + + 0 @@ -5071,18 +4968,7 @@ - 3 - 2 - [@(:include - 1 - - 0 - - -38 - - - 2 - decl:)@] + 0 @@ -5118,28 +5004,6 @@ 0 - - - 0 - - -46 - - - - 0 - - - - - 0 - - -47 - - - - 0 - - 0 @@ -5177,13 +5041,152 @@ 0 - -51 + -46 0 + + + 0 + + -51 + + + + 29 + 2 + [@#include <(:link + 1 + + 0 + + -19 + + + 2 + :)> #include <(:link + 1 + + 0 + + -60 + + + 2 + :)> #include <(:link + 1 + + 0 + + -64 + + + 2 + :)> #include <(:link + 1 + + 0 + + -27 + + + 2 + :)> #include <(:link + 1 + + 0 + + -71 + + + 2 + :)> #include <(:link + 1 + + 0 + + -73 + + + 2 + :)> #include <(:link + 1 + + 0 + + -9 + + + 2 + :)> #include <(:link + 1 + + 0 + + -39 + + + 2 + :)> #include <(:link + 1 + + 0 + + -12 + + + 2 + :)> #include <(:link + 1 + + 0 + + -63 + + + 2 + :)> #include <(:link + 1 + + 0 + + -23 + + + 2 + :)> #include <(:link + 1 + + 0 + + -70 + + + 2 + :)> #include <(:link + 1 + + 0 + + -58 + + + 2 + :)> #include <(:link + 1 + + 0 + + -72 + + + 2 + :)>@] + + 0 @@ -5192,7 +5195,18 @@ - 0 + 3 + 2 + [@(:include + 1 + + 0 + + -6 + + + 2 + decl:)@] @@ -5203,18 +5217,18 @@ - 3 - 2 - [@(:include - 1 - - 0 - - -59 - - - 2 - def:)@] + 0 + + + + + 0 + + -47 + + + + 0 @@ -5225,7 +5239,27 @@ - 0 + 5 + 2 + [@(:include + 1 + + 0 + + -49 + + + 2 + decl:) namespace boost { (:include + 1 + + 0 + + -57 + + + 2 + decl:) }@] @@ -5247,18 +5281,7 @@ - 3 - 2 - [@(:include - 1 - - 0 - - -49 - - - 2 - decl:)@] + 0 @@ -5269,18 +5292,7 @@ - 3 - 2 - [@(:include - 1 - - 0 - - -45 - - - 2 - decl:)@] + 0 @@ -5298,7 +5310,7 @@ 0 - -47 + -66 2 @@ -5324,7 +5336,18 @@ - 0 + 3 + 2 + [@(:include + 1 + + 0 + + -67 + + + 2 + decl:)@] @@ -5346,18 +5369,7 @@ - 3 - 2 - [@(:include - 1 - - 0 - - -23 - - - 2 - decl:)@] + 0 @@ -5368,7 +5380,18 @@ - 0 + 3 + 2 + [@(:include + 1 + + 0 + + -32 + + + 2 + def:)@] @@ -5379,7 +5402,54 @@ - 0 + 11 + 2 + [@(:include + 1 + + 0 + + -16 + + + 2 + def:) (:include + 1 + + 0 + + -67 + + + 2 + decl:) typedef (:link + 1 + + 0 + + -67 + + + 2 + :)<struct throw_function_,char const *> throw_function; typedef (:link + 1 + + 0 + + -67 + + + 2 + :)<struct throw_file_,char const *> throw_file; typedef (:link + 1 + + 0 + + -67 + + + 2 + :)<struct throw_line_,int> throw_line;@] @@ -5444,17 +5514,6 @@ -70 - - 0 - - - - - 0 - - -71 - - 3 2 @@ -5463,7 +5522,7 @@ 0 - -32 + -55 2 @@ -5474,18 +5533,18 @@ 0 - -72 + -71 - 11 + 5 2 [@(:include 1 0 - -30 + -67 2 @@ -5494,38 +5553,33 @@ 0 - -5 + -43 2 - decl:) typedef (:link + decl:)@] + + + + + 0 + + -72 + + + + 3 + 2 + [@(:include 1 0 - -5 + -48 2 - :)<struct throw_function_,char const *> throw_function; typedef (:link - 1 - - 0 - - -5 - - - 2 - :)<struct throw_file_,char const *> throw_file; typedef (:link - 1 - - 0 - - -5 - - - 2 - :)<struct throw_line_,int> throw_line;@] + def:)@] @@ -5543,7 +5597,7 @@ 0 - -5 + -41 2 @@ -5583,6 +5637,17 @@ 0 + + + 0 + + -77 + + + + 0 + + @@ -5590,13 +5655,13 @@ decl - 79 + 80 reno_layer - 72 + 73 0 @@ -5605,18 +5670,7 @@ - 3 - 2 - [@template <class Tag,class T> class (:link - 1 - - 0 - - -5 - - - 2 - :);@] + 0 @@ -5627,7 +5681,18 @@ - 0 + 3 + 2 + [@template <class T> ---unspecified--- (:link + 1 + + 0 + + -6 + + + 2 + :)( T const & x );@] @@ -5649,7 +5714,27 @@ - 0 + 5 + 2 + [@typedef (:link + 1 + + 0 + + -67 + + + 2 + :)<struct tag_original_exception_type,std::type_info const *> + 1 + + 0 + + -8 + + + 2 + ;@] @@ -5682,7 +5767,18 @@ - 0 + 3 + 2 + [@(:link + 1 + + 0 + + -11 + + + 2 + mod="m":)();@] @@ -5704,7 +5800,27 @@ - 0 + 5 + 2 + [@template <class T> (:link + 1 + + 0 + + -53 + + + 2 + :) (:link + 1 + + 0 + + -13 + + + 2 + :)( T const & e );@] @@ -5736,32 +5852,52 @@ -16 - - 0 - - - - - 0 - - -17 - - 3 2 - [@typedef ---unspecified--- (:link + [@class (:link 1 0 - -17 + -16 2 :);@] + + + 0 + + -17 + + + + 5 + 2 + [@(:link + 1 + + 0 + + -53 + + + 2 + :) (:link + 1 + + 0 + + -17 + + + 2 + :)();@] + + 0 @@ -5770,7 +5906,27 @@ - 0 + 5 + 2 + [@(:link + 1 + + 0 + + -18 + + + 2 + mod="m":)( (:link + 1 + + 0 + + -30 + + + 2 + mod="m":) const & v );@] @@ -5792,27 +5948,7 @@ - 5 - 2 - [@typedef (:link - 1 - - 0 - - -5 - - - 2 - :)<struct tag_original_exception_type,std::type_info const *> - 1 - - 0 - - -20 - - - 2 - ;@] + 0 @@ -5834,18 +5970,9 @@ - 5 + 3 2 - [@(:link - 1 - - 0 - - -17 - - - 2 - :) (:link + [@template <class E> E * 1 0 @@ -5854,7 +5981,7 @@ 2 - :)();@] + ();@] @@ -5865,27 +5992,7 @@ - 5 - 2 - [@template <class ErrorInfo,class E> typename ErrorInfo::(:link - 1 - - 0 - - -55 - - - 2 - mod="m":) const * (:link - 1 - - 0 - - -23 - - - 2 - :)( E const & x );@] + 0 @@ -5940,18 +6047,9 @@ - 19 + 3 2 - [@#if !defined( BOOST_EXCEPTION_DISABLE ) #include <(:link - 1 - - 0 - - -72 - - - 2 - :)> #include <boost/current_function.hpp> #define (:link + [@template <class T> ---unspecified--- (:link 1 0 @@ -5960,70 +6058,7 @@ 2 - :)(x)\ ::boost::(:link - 1 - - 0 - - -35 - - - 2 - :)( ::boost::(:link - 1 - - 0 - - -38 - - - 2 - :)(x) <<\ ::boost::(:link - 1 - - 0 - - -72 - - - 2 - |throw_function:)(BOOST_CURRENT_FUNCTION) <<\ ::boost::(:link - 1 - - 0 - - -72 - - - 2 - |throw_file:)(__FILE__) <<\ ::boost::(:link - 1 - - 0 - - -72 - - - 2 - |throw_line:)((int)__LINE__) ) #else #define (:link - 1 - - 0 - - -28 - - - 2 - :)(x) ::boost::(:link - 1 - - 0 - - -35 - - - 2 - :)(x) #endif@] + :)( T const & e );@] @@ -6034,27 +6069,7 @@ - 5 - 2 - [@(:link - 1 - - 0 - - -29 - - - 2 - mod="m":)( (:link - 1 - - 0 - - -55 - - - 2 - mod="m":) const & v );@] + 0 @@ -6067,7 +6082,7 @@ 3 2 - [@class (:link + [@typedef T (:link 1 0 @@ -6076,7 +6091,7 @@ 2 - :);@] + mod="m":);@] @@ -6087,7 +6102,27 @@ - 0 + 5 + 2 + [@class (:link + 1 + + 0 + + -31 + + + 2 + :): public std::exception public boost:: + 1 + + 0 + + -16 + + + 2 + { ---unspecified--- };@] @@ -6109,7 +6144,27 @@ - 0 + 5 + 2 + [@void (:link + 1 + + 0 + + -33 + + + 2 + :)( (:link + 1 + + 0 + + -53 + + + 2 + :) const & ep ); @@ -6131,27 +6186,7 @@ - 5 - 2 - [@#ifdef BOOST_NO_EXCEPTIONS void (:link - 1 - - 0 - - -35 - - - 2 - :)( std::exception const & e ); // user defined #else template <class E> void (:link - 1 - - 0 - - -35 - - - 2 - :)( E const & e ); #endif@] + 0 @@ -6162,27 +6197,7 @@ - 5 - 2 - [@void (:link - 1 - - 0 - - -36 - - - 2 - :)( (:link - 1 - - 0 - - -17 - - - 2 - :) const & ep ); + 0 @@ -6193,27 +6208,7 @@ - 5 - 2 - [@template <class T> (:link - 1 - - 0 - - -17 - - - 2 - :) (:link - 1 - - 0 - - -37 - - - 2 - :)( T const & e );@] + 0 @@ -6224,18 +6219,7 @@ - 3 - 2 - [@template <class T> ---unspecified--- (:link - 1 - - 0 - - -38 - - - 2 - :)( T const & x );@] + 0 @@ -6257,7 +6241,27 @@ - 0 + 5 + 2 + [@(:link + 1 + + 0 + + -30 + + + 2 + mod="m":) const & (:link + 1 + + 0 + + -40 + + + 2 + mod="m":)() const;@] @@ -6268,7 +6272,36 @@ - 0 + 7 + 2 + [@template <class E, class Tag1, class T1, ..., class TagN, class TN> E const & (:link + 1 + + 0 + + -41 + + + 2 + mod="/":)( E const & x, (:link http://www.boost.org/libs/tuple/doc/tuple_users_guide.html|tuple:)< (:link + 1 + + 0 + + -67 + + + 2 + :)<Tag1,T1>, ..., (:link + 1 + + 0 + + -67 + + + 2 + :)<TagN,TN> > const & v );@] @@ -6279,7 +6312,36 @@ - 0 + 7 + 2 + [@(:link + 1 + + 0 + + -42 + + + 2 + mod="m":)(); (:link + 1 + + 0 + + -42 + + + 2 + mod="m":)( (:link + 1 + + 0 + + -16 + + + 2 + :) const & x );@] @@ -6290,9 +6352,9 @@ - 3 + 5 2 - [@(:link + [@template <class E, class Tag, class T> E const & (:link 1 0 @@ -6301,7 +6363,16 @@ 2 - mod="m":)();@] + mod="/":)( E const & x, (:link + 1 + + 0 + + -67 + + + 2 + :)<Tag,T> const & v );@] @@ -6322,39 +6393,6 @@ -45 - - 3 - 2 - [@template <class E> E * - 1 - - 0 - - -45 - - - 2 - ();@] - - - - - 0 - - -46 - - - - 0 - - - - - 0 - - -47 - - 0 @@ -6378,9 +6416,18 @@ - 3 + 19 2 - [@template <class T> ---unspecified--- (:link + [@#if !defined( BOOST_EXCEPTION_DISABLE ) #include <(:link + 1 + + 0 + + -64 + + + 2 + :)> #include <boost/current_function.hpp> #define (:link 1 0 @@ -6389,7 +6436,70 @@ 2 - :)( T const & e );@] + :)(x)\ ::boost::(:link + 1 + + 0 + + -57 + + + 2 + :)( ::boost::(:link + 1 + + 0 + + -6 + + + 2 + :)(x) <<\ ::boost::(:link + 1 + + 0 + + -64 + + + 2 + |throw_function:)(BOOST_CURRENT_FUNCTION) <<\ ::boost::(:link + 1 + + 0 + + -64 + + + 2 + |throw_file:)(__FILE__) <<\ ::boost::(:link + 1 + + 0 + + -64 + + + 2 + |throw_line:)((int)__LINE__) ) #else #define (:link + 1 + + 0 + + -49 + + + 2 + :)(x) ::boost::(:link + 1 + + 0 + + -57 + + + 2 + :)(x) #endif@] @@ -6400,9 +6510,9 @@ - 5 + 3 2 - [@template <class E, class Tag, class T> E const & (:link + [@std::string (:link 1 0 @@ -6411,16 +6521,18 @@ 2 - mod="/":)( E const & x, (:link - 1 - - 0 - - -5 - - - 2 - :)<Tag,T> const & v );@] + :)();@] + + + + + 0 + + -46 + + + + 0 @@ -6452,6 +6564,28 @@ -53 + + 3 + 2 + [@typedef ---unspecified--- (:link + 1 + + 0 + + -53 + + + 2 + :);@] + + + + + 0 + + -47 + + 0 @@ -6475,18 +6609,7 @@ - 3 - 2 - [@typedef T (:link - 1 - - 0 - - -55 - - - 2 - mod="m":);@] + 0 @@ -6497,7 +6620,27 @@ - 0 + 5 + 2 + [@template <class ErrorInfo,class E> typename ErrorInfo::(:link + 1 + + 0 + + -30 + + + 2 + mod="m":) const * (:link + 1 + + 0 + + -56 + + + 2 + :)( E const & x );@] @@ -6508,7 +6651,27 @@ - 0 + 5 + 2 + [@#ifdef BOOST_NO_EXCEPTIONS void (:link + 1 + + 0 + + -57 + + + 2 + :)( std::exception const & e ); // user defined #else template <class E> void (:link + 1 + + 0 + + -57 + + + 2 + :)( E const & e ); #endif@] @@ -6541,27 +6704,7 @@ - 5 - 2 - [@(:link - 1 - - 0 - - -55 - - - 2 - mod="m":) const & (:link - 1 - - 0 - - -60 - - - 2 - mod="m":)() const;@] + 0 @@ -6572,7 +6715,36 @@ - 0 + 7 + 2 + [@template <class E> std::string (:link + 1 + + 0 + + -61 + + + 2 + :)( E const & e ); std::string (:link + 1 + + 0 + + -61 + + + 2 + :)( + 1 + + 0 + + -53 + + + 2 + const & p );@] @@ -6605,36 +6777,7 @@ - 7 - 2 - [@(:link - 1 - - 0 - - -64 - - - 2 - mod="m":)(); (:link - 1 - - 0 - - -64 - - - 2 - mod="m":)( (:link - 1 - - 0 - - -30 - - - 2 - :) const & x );@] + 0 @@ -6645,27 +6788,7 @@ - 5 - 2 - [@class (:link - 1 - - 0 - - -65 - - - 2 - :): public std::exception public boost:: - 1 - - 0 - - -30 - - - 2 - { ---unspecified--- };@] + 0 @@ -6676,18 +6799,7 @@ - 3 - 2 - [@std::string (:link - 1 - - 0 - - -66 - - - 2 - :)();@] + 0 @@ -6698,7 +6810,18 @@ - 0 + 3 + 2 + [@template <class Tag,class T> class (:link + 1 + + 0 + + -67 + + + 2 + :);@] @@ -6709,36 +6832,7 @@ - 7 - 2 - [@template <class E, class Tag1, class T1, ..., class TagN, class TN> E const & (:link - 1 - - 0 - - -68 - - - 2 - mod="/":)( E const & x, (:link http://www.boost.org/libs/tuple/doc/tuple_users_guide.html|tuple:)< (:link - 1 - - 0 - - -5 - - - 2 - :)<Tag1,T1>, ..., (:link - 1 - - 0 - - -5 - - - 2 - :)<TagN,TN> > const & v );@] + 0 @@ -6804,36 +6898,7 @@ - 7 - 2 - [@template <class E> std::string (:link - 1 - - 0 - - -74 - - - 2 - :)( E const & e ); std::string (:link - 1 - - 0 - - -74 - - - 2 - :)( - 1 - - 0 - - -17 - - - 2 - const & p );@] + 0 @@ -6858,6 +6923,17 @@ 0 + + + 0 + + -77 + + + + 0 + + @@ -6865,13 +6941,13 @@ include - 80 + 81 reno_layer - 72 + 73 0 @@ -6880,189 +6956,27 @@ - 41 + 5 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: T must have accessible copy constructor and must not be a reference (there is no requirement that T's copy constructor does not throw.) !!!!Description: This class template is used to associate a Tag type with a value type T. Objects of type (:link + (:auto !!!:) Exception types should use virtual inheritance when deriving from other exception types. This insight is due to Andrew Koenig. Using virtual inheritance prevents ambiguity problems in the exception handler: [@#include <iostream> struct my_exc1 : std::exception { char const* what() const throw(); }; struct my_exc2 : std::exception { char const* what() const throw(); }; struct your_exc3 : my_exc1, my_exc2 {}; int main() { try { throw your_exc3(); } catch(std::exception const& e) {} catch(...) { std::cout << "whoops!" << std::endl; } }@] The program above outputs "whoops!" because the conversion to std::exception is ambiguous. The overhead introduced by virtual inheritance is always negligible in the context of exception handling. Note that virtual bases are initialized directly by the constructor of the most-derived-type (the type passed to the throw statement, in case of exceptions.) However, typically this detail is of no concern when boost::(:link 1 0 - -5 + -16 2 - :)<Tag,T> can be passed to (:link + :) is used, because it enables exception types to be trivial structs with no members (there's nothing to initialize.) See (:link 1 0 - -50 + -46 2 - mod="/":) to be stored in objects of type boost::(:link - 1 - - 0 - - -30 - - - 2 - :). !!!!Usage: The header <(:link - 1 - - 0 - - -73 - - - 2 - :)> provides a declaration of the (:link - 1 - - 0 - - -5 - - - 2 - :) template, which is sufficient for the purpose of typedefing an instance for specific Tag and T, for example: [@#include <(:link - 1 - - 0 - - -73 - - - 2 - :)> struct tag_errno; typedef boost::(:link - 1 - - 0 - - -5 - - - 2 - :)<tag_errno,int> errno_info;@] Or, the shorter equivalent: [@#include <(:link - 1 - - 0 - - -73 - - - 2 - :)> typedef boost::(:link - 1 - - 0 - - -5 - - - 2 - :)<struct tag_errno,int> errno_info;@] This errno_info typedef can be passed to (:link - 1 - - 0 - - -50 - - - 2 - mod="/":) (#include <(:link - 1 - - 0 - - -8 - - - 2 - :)> first) to store an int named tag_errno in exceptions of types that derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :): [@throw file_read_error() (:link - 1 - - 0 - - -50 - - - 2 - |<<:) errno_info(errno);@] It can also be passed to (:link - 1 - - 0 - - -23 - - - 2 - :) (#include <(:link - 1 - - 0 - - -62 - - - 2 - :)> first) to retrieve the tag_errno int from a boost::(:link - 1 - - 0 - - -30 - - - 2 - :): [@catch( boost::(:link - 1 - - 0 - - -30 - - - 2 - :) & x ) { if( int const * e=boost::(:link - 1 - - 0 - - -23 - - - 2 - :)<errno_info>(x) ) .... }@] For convenience and uniformity, Boost Exception defines the following commonly used (:link - 1 - - 0 - - -5 - - - 2 - :) typedefs, ready for use with (:link - 1 - - 0 - - -50 - - - 2 - mod="/":): (:pagelist tags="error_info_instance":) + mod="w":). @@ -7073,90 +6987,27 @@ - 19 + 5 2 - (:auto !!:) Boost Exception responds to the following configuration macros: '''BOOST_NO_RTTI'''\\ '''BOOST_NO_TYPEID''' The first macro prevents Boost Exception from using dynamic_cast and dynamic typeid. If the second macro is also defined, Boost Exception does not use static typeid either. There are no observable degrading effects on the library functionality, except for the following: ->By default, the (:link + (:auto !!!:) (:include synopsis:) !!!!Requirements: T must be a class with an accessible no-throw copy constructor as per (15.5.1). !!!!Returns: * If T derives from boost::(:link 1 0 - -23 + -16 2 - :) function template can be called with any exception type. If BOOST_NO_RTTI is defined, (:link + :), the returned object is of type T and is a copy of x. * Otherwise, the returned object is of an unspecified type that derives publicly from both T and boost::(:link 1 0 - -23 + -16 2 - :) can be used only with objects of type boost::(:link - 1 - - 0 - - -30 - - - 2 - :). !!!!Note: The library needs RTTI functionality. Disabling the language RTTI support enables an internal RTTI system, which may have more or less overhead depending on the platform. '''BOOST_EXCEPTION_DISABLE''' By default, (:link - 1 - - 0 - - -49 - - - 2 - :) and (:link - 1 - - 0 - - -38 - - - 2 - :) are integrated directly in the (:link - 1 - - 0 - - -35 - - - 2 - :) function. Defining BOOST_EXCEPTION_DISABLE disables this integration. Note that on some non-conformant compilers, for example MSVC 7.0 and older, as well as BCC, BOOST_EXCEPTION_DISABLE is implicitly defined in (:link - 1 - - 0 - - -19 - - - 2 - :). '''BOOST_NO_EXCEPTIONS''' This macro disables exception handling in Boost, forwarding all exceptions to a user-defined non-template version of boost:: - 1 - - 0 - - -35 - - - 2 - . However, unless BOOST_EXCEPTION_DISABLE is also defined, users can still examine the exception object for any data added at the point of the throw, or use boost:: - 1 - - 0 - - -74 - - - 2 - (of course under BOOST_NO_EXCEPTIONS, the user-defined boost::throw_exception is not allowed to return to the caller.) + :). The T sub-object is initialized from x by the T copy constructor. !!!!Throws: Nothing. @@ -7167,9 +7018,54 @@ - 1 + 11 2 - (:auto !!:) !!!Synopsis (:include synopsis:) + !!!!Example: this is a possible output from the (:link + 1 + + 0 + + -61 + + + 2 + :) function, as used in ''libs/exception/example/example_io.cpp:'' [@example_io.cpp(70): Throw in function class boost::shared_ptr<struct _iobuf> __cdecl my_fopen(const char *,const char *) Dynamic exception type: class boost::exception_detail::clone_impl<struct fopen_error> std::exception::what: example_io error [struct boost::(:link + 1 + + 0 + + -26 + + + 2 + :)_ *] = fopen [struct boost::(:link + 1 + + 0 + + -32 + + + 2 + :)_ *] = 2, "No such file or directory" [struct boost::(:link + 1 + + 0 + + -55 + + + 2 + :)_ *] = tmp1.txt [struct boost::(:link + 1 + + 0 + + -66 + + + 2 + :)_ *] = rb@] @@ -7180,9 +7076,45 @@ - 1 + 9 2 - (:auto !!:) !!!Synopsis (:include synopsis:) + (:auto !!!:) (:include synopsis:) This + 1 + + 0 + + -67 + + + 2 + typedef is used by + 1 + + 0 + + -17 + + + 2 + if it defaults to returning an + 1 + + 0 + + -53 + + + 2 + that refers to an object of type + 1 + + 0 + + -31 + + + 2 + , to record in it the std::type_info of the original exception object. @@ -7206,27 +7138,18 @@ - 11 + 19 2 - (:auto !!:) All exception types that derive from boost::(:link + (:auto !!!:) The code snippet below demonstrates how boost::(:link http://www.boost.org/libs/tuple/doc/tuple_users_guide.html|tuple:) can be used to bundle the name of the function that failed, together with the reported errno so that they can be added to exception objects more conveniently together: [@#include <(:link 1 0 - -30 + -73 2 - :) can be used as type-safe containers of arbitrary data objects, while complying with the no-throw requirements (15.5.1) of the ANSI C++ standard for exception types. When exceptions derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :), arbitrary data can be added to exception objects: *At the point of the throw; *At a later time as exceptions bubble up the call stack. (:include + :)> #include <(:link 1 0 @@ -7235,1634 +7158,12 @@ 2 - :) (:include + :)> #include <(:link 1 0 - -51 - - - 2 - :) (:include - 1 - - 0 - - -33 - - - 2 - :) - - - - - 0 - - -11 - - - - 1 - 2 - (:auto !!:) !!!Synopsis (:include synopsis:) - - - - - 0 - - -12 - - - - 19 - 2 - (:auto !!:) Boost Exception provides a namespace-scope function (:link - 1 - - 0 - - -74 - - - 2 - :) which takes a boost::(:link - 1 - - 0 - - -30 - - - 2 - :). The returned string contains: *the string representation of all data objects added to the boost::(:link - 1 - - 0 - - -30 - - - 2 - :) through (:link - 1 - - 0 - - -50 - - - 2 - mod="/":); *the output from std::exception::what; *additional platform-specific diagnostic information. The returned string is not presentable as a friendly user message, but because it is generated automatically, it is useful for debugging or logging purposes. Here is an example: [@#include <(:link - 1 - - 0 - - -40 - - - 2 - :)> #include <iostream> void f(); //throws unknown types that derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :). void g() { try { f(); } catch( boost::(:link - 1 - - 0 - - -30 - - - 2 - :) & e ) { std::cerr << (:link - 1 - - 0 - - -74 - - - 2 - :)(e); } }@] (:include - 1 - - 0 - - -16 - - - 2 - :) - - - - - 0 - - -13 - - - - 73 - 2 - !!Synopsis List of documented definitions, declarations and includes by header file: `#include <(:link - 1 - - 0 - - -72 - - - 2 - :)> [@(:include - 1 - - 0 - - -72 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -73 - - - 2 - :)> [@(:include - 1 - - 0 - - -73 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -8 - - - 2 - :)> [@(:include - 1 - - 0 - - -8 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -11 - - - 2 - :)> [@(:include - 1 - - 0 - - -11 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -42 - - - 2 - :)> [@(:include - 1 - - 0 - - -42 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -24 - - - 2 - :)> [@(:include - 1 - - 0 - - -24 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -57 - - - 2 - :)> [@(:include - 1 - - 0 - - -57 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -27 - - - 2 - :)> [@(:include - 1 - - 0 - - -27 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -56 - - - 2 - :)> [@(:include - 1 - - 0 - - -56 - - - 2 - synopsis:)@] `#include <(:link - 1 - - 0 - - -19 - - - 2 - :)> [@(:include - 1 - - 0 - - -19 - - - 2 - synopsis:)@] `#include < - 1 - - 0 - - -58 - - - 2 - > (:include - 1 - - 0 - - -58 - - - 2 - synopsis:) `#include < - 1 - - 0 - - -14 - - - 2 - > (:include - 1 - - 0 - - -14 - - - 2 - synopsis:) `#include < - 1 - - 0 - - -71 - - - 2 - > (:include - 1 - - 0 - - -71 - - - 2 - synopsis:) `#include < - 1 - - 0 - - -53 - - - 2 - > (:include - 1 - - 0 - - -53 - - - 2 - synopsis:) `#include < - 1 - - 0 - - -7 - - - 2 - > (:include - 1 - - 0 - - -7 - - - 2 - synopsis:) `#include < - 1 - - 0 - - -41 - - - 2 - > (:include - 1 - - 0 - - -41 - - - 2 - synopsis:) `#include < - 1 - - 0 - - -9 - - - 2 - > (:include - 1 - - 0 - - -9 - - - 2 - synopsis:) `#include < - 1 - - 0 - - -40 - - - 2 - > (:include - 1 - - 0 - - -40 - - - 2 - synopsis:) - - - - - 0 - - -14 - - - - 1 - 2 - (:auto !!:) !!!Synopsis (:include synopsis:) - - - - - 0 - - -15 - - - - 3 - 2 - (:auto !!:) This header has been deprecated. Please #include < - 1 - - 0 - - -40 - - - 2 - > instead. - - - - - 0 - - -16 - - - - 11 - 2 - !!!!Example: this is a possible output from the (:link - 1 - - 0 - - -74 - - - 2 - :) function, as used in ''libs/exception/example/example_io.cpp:'' [@example_io.cpp(70): Throw in function class boost::shared_ptr<struct _iobuf> __cdecl my_fopen(const char *,const char *) Dynamic exception type: class boost::exception_detail::clone_impl<struct fopen_error> std::exception::what: example_io error [struct boost::(:link - 1 - - 0 - - -47 - - - 2 - :)_ *] = fopen [struct boost::(:link - 1 - - 0 - - -32 - - - 2 - :)_ *] = 2, "No such file or directory" [struct boost::(:link - 1 - - 0 - - -25 - - - 2 - :)_ *] = tmp1.txt [struct boost::(:link - 1 - - 0 - - -76 - - - 2 - :)_ *] = rb@] - - - - - 0 - - -17 - - - - 25 - 2 - (:auto !!!:) (:include synopsis:) The (:link - 1 - - 0 - - -17 - - - 2 - :) type can be used to refer to a copy of an exception object. It is Default Constructible, Copy Constructible, Assignable and Equality Comparable; (:link - 1 - - 0 - - -17 - - - 2 - :)'s operations do not throw. The referenced object remains valid at least as long as there is an (:link - 1 - - 0 - - -17 - - - 2 - :) object that refers to it. Two instances of (:link - 1 - - 0 - - -17 - - - 2 - :) are equivalent and compare equal if and only if they refer to the same exception. The default constructor of (:link - 1 - - 0 - - -17 - - - 2 - :) produces the null value of the type. The null value is equivalent only to itself. !!!!Thread safety * It is legal for multiple threads to hold (:link - 1 - - 0 - - -17 - - - 2 - :) references to the same exception object. * It is illegal for multiple threads to modify the same (:link - 1 - - 0 - - -17 - - - 2 - :) object concurrently. * While calling (:link - 1 - - 0 - - -22 - - - 2 - :) makes a copy of the current exception object, it is still possible for the two copies to share internal state. Therefore, in general it is not safe to call (:link - 1 - - 0 - - -36 - - - 2 - :) concurrently to throw the same exception object into multiple threads. !!!!Nesting of exceptions: An (:link - 1 - - 0 - - -17 - - - 2 - :) can be added as (:link - 1 - - 0 - - -5 - - - 2 - :) to any boost::(:link - 1 - - 0 - - -30 - - - 2 - :). This is a convenient way to nest exceptions. There is no limit on the depth of the nesting, however cyclic references result in undefined behavior. - - - - - 0 - - -18 - - - - 79 - 2 - (:auto !!:) !!!Why doesn't boost::exception derive from std::exception? Despite that (:link - 1 - - 0 - - -69 - - - 2 - |virtual inheritance should be used in deriving from base exception types:), many programmers fail to follow this principle when deriving from std::exception. If boost::(:link - 1 - - 0 - - -30 - - - 2 - :) derives from std::exception, using the (:link - 1 - - 0 - - -38 - - - 2 - :) function with such user-defined types would introduce dangerous ambiguity which would break all catch(std::exception &) statements. Of course, boost::(:link - 1 - - 0 - - -30 - - - 2 - :) should not be used to replace std::exception as a base type in exception type hierarchies. Instead, it should be included as a virtual base, in addition to std::exception (which should also be derived virtually.) !!!Why is boost::exception abstract? To prevent exception-neutral contexts from erroneously erasing the type of the original exception when adding (:link - 1 - - 0 - - -5 - - - 2 - :) to an active exception object: [@catch( boost::(:link - 1 - - 0 - - -30 - - - 2 - :) & e ) { e (:link - 1 - - 0 - - -50 - - - 2 - |<<:) foo_info(foo); throw e; //Compile error: boost::(:link - 1 - - 0 - - -30 - - - 2 - :) is abstract }@] The correct code is: [@catch( boost::(:link - 1 - - 0 - - -30 - - - 2 - :) & e ) { e (:link - 1 - - 0 - - -50 - - - 2 - |<<:) foo_info(foo); throw; //Okay, re-throwing the original exception object. }@] !!!What is the space overhead of the boost::exception base class? The space overhead for the boost::exception data members is negligible in the context of exception handling. Throwing objects that derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) does not by itself cause dynamic memory allocations. Deriving from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) enables any data to be added to exceptions, which usually does allocate memory. However, this memory is reclaimed when the exception has been handled, and since typically user code does not allocate memory during the unrolling of the stack, adding error info to exceptions should not cause memory fragmentation. !!!Should I use boost::throw_exception or BOOST_THROW_EXCEPTION or just throw? The benefit of calling boost::(:link - 1 - - 0 - - -35 - - - 2 - :) instead of using throw directly is that it ensures that the emitted exception derives from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) and that it is compatible with boost::(:link - 1 - - 0 - - -22 - - - 2 - :). The (:link - 1 - - 0 - - -28 - - - 2 - :) macro also results in a call to boost::(:link - 1 - - 0 - - -35 - - - 2 - :), but in addition it records in the exception object the __FILE__ and __LINE__ of the throw, as well as the pretty name of the function that throws. This has virtually no overhead, yet enables boost::(:link - 1 - - 0 - - -74 - - - 2 - :) to compose a more useful, if not user-friendly message. Typical use of boost::(:link - 1 - - 0 - - -74 - - - 2 - :) is: [@catch( boost::exception & e ) { std::cerr << "OMG!" << boost::diagnostic_information(e); } catch( ... ) { std::cerr << "OMG!!!"; }@] This is a possible message it may display, the first line is only possible if (:link - 1 - - 0 - - -28 - - - 2 - :) is used: [@example_io.cpp(70): Throw in function class boost::shared_ptr<struct _iobuf> __cdecl my_fopen(const char *,const char *) Dynamic exception type: class boost::exception_detail::clone_impl<class fopen_error> std::exception::what: example_io error [struct boost::(:link - 1 - - 0 - - -47 - - - 2 - :)_ *] = fopen [struct boost::(:link - 1 - - 0 - - -32 - - - 2 - :)_ *] = 2, "No such file or directory" [struct boost::(:link - 1 - - 0 - - -25 - - - 2 - :)_ *] = tmp1.txt [struct boost::(:link - 1 - - 0 - - -76 - - - 2 - :)_ *] = rb@] !!!Why is boost::exception integrated in boost::throw_exception? The boost::(:link - 1 - - 0 - - -35 - - - 2 - :) function predates the Boost Exception library and there has been some concern about its current behavior of injecting boost::(:link - 1 - - 0 - - -30 - - - 2 - :) as a base of any exception passed to boost::(:link - 1 - - 0 - - -35 - - - 2 - :). Such concerns are dictated by the typical strict interpretation of a common principle in C and C++, that users only pay for features they actually use. The problem is that users of Boost Exception can't by themselves cause a library to throw types that derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :), and without this they can't use any of the Boost Exception facilities. For example, if a user wants to use Boost Serialization in a separate thread, it is desirable to be able to transport exceptions emitted by that library into the main thread where they can be analyzed to generate a user-friendly message. This can be easily achieved using boost::(:link - 1 - - 0 - - -17 - - - 2 - :), but this requires that Boost Serialization throws exceptions using boost::(:link - 1 - - 0 - - -49 - - - 2 - :). If Boost Serialization calls boost::(:link - 1 - - 0 - - -35 - - - 2 - :) to throw, this behavior happens automatically and transparently. The cost of this integration is: * In terms of space: a pointer and 3 ints are added to the static size of exception objects. * In terms of speed: the pointer is initialized to null at the point of the throw. * In terms of coupling: about 400 self-contained lines of C++ with no external includes. !!!Why use operator<< overload for adding info to exceptions? Before throwing an object of type that derives from boost::(:link - 1 - - 0 - - -30 - - - 2 - :), it is often desirable to add one or more (:link - 1 - - 0 - - -5 - - - 2 - :) objects in it. The syntactic sugar provided by (:link - 1 - - 0 - - -50 - - - 2 - :) allows this to be done directly in a throw expression: [@throw error() (:link - 1 - - 0 - - -50 - - - 2 - |<<:) foo_info(foo) (:link - 1 - - 0 - - -50 - - - 2 - |<<:) bar_info(bar);@] which saves typing compared to this possible alternative: [@error e; e.add(foo_info(foo)); e.add(bar_info(bar)); throw e;@] and looks better than something like: [@throw error().add(foo_info(foo)).add(bar_info(bar));@] !!!Why is operator<< allowed to throw? This question is referring to the following issue. Consider this throw statement example: [@throw file_open_error() (:link - 1 - - 0 - - -50 - - - 2 - |<<:) file_name(fn);@] The intention here is to throw a file_open_error, however if (:link - 1 - - 0 - - -50 - - - 2 - mod="/":) fails to copy the std::string contained in the file_name (:link - 1 - - 0 - - -5 - - - 2 - :) wrapper, a std::bad_alloc could propagate instead. This behavior seems undesirable to some programmers. Bjarne Stroustrup, The C++ Programming Language, 3rd Edition, page 371: ->''"Throwing an exception requires an object to throw. A C++ implementation is required to have enough spare memory to be able to throw bad_alloc in case of memory exhaustion. However, it is possible that throwing some other exception will cause memory exhaustion."'' So, an attempt to throw any exception may already result in propagating std::bad_alloc instead. - - - - - 0 - - -19 - - - - 1 - 2 - (:auto !!:) !!!Synopsis (:include synopsis:) - - - - - 0 - - -20 - - - - 9 - 2 - (:auto !!!:) (:include synopsis:) This - 1 - - 0 - - -5 - - - 2 - typedef is used by - 1 - - 0 - - -22 - - - 2 - if it defaults to returning an - 1 - - 0 - - -17 - - - 2 - that refers to an object of type - 1 - - 0 - - -65 - - - 2 - , to record in it the std::type_info of the original exception object. - - - - - 0 - - -21 - - - - 1 - 2 - (:auto !:) This is an alphabetical list of all Boost Exception documentation pages. (:pagelist fmt="index" except_tags="index noindex" mod="w":) - - - - - 0 - - -22 - - - - 33 - 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: The (:link - 1 - - 0 - - -22 - - - 2 - :) function must not be called outside of a catch block. !!!!Returns: * An (:link - 1 - - 0 - - -17 - - - 2 - :) that refers to the currently handled exception or a copy of the currently handled exception. * If the function needs to allocate memory and the attempt fails, it returns an (:link - 1 - - 0 - - -17 - - - 2 - :) that refers to an instance of std::bad_alloc. !!!!Throws: Nothing. !!!!Notes: * It is unspecified whether the return values of two successive calls to (:link - 1 - - 0 - - -22 - - - 2 - :) refer to the same exception object. * Correct implementation of (:link - 1 - - 0 - - -22 - - - 2 - :) may require compiler support, unless (:link - 1 - - 0 - - -49 - - - 2 - :) was used at the time the currently handled exception object was passed to throw. Whenever - 1 - - 0 - - -22 - - - 2 - fails to properly copy the current exception object, it returns an - 1 - - 0 - - -17 - - - 2 - to an object of type that is as close as possible to the original exception type, using - 1 - - 0 - - -65 - - - 2 - as a final fallback. All such types derive from boost:: - 1 - - 0 - - -30 - - - 2 - , and: ** if the original exception object derives from boost::(:link - 1 - - 0 - - -30 - - - 2 - :), then the boost::(:link - 1 - - 0 - - -30 - - - 2 - :) sub-object of the object referred to by the returned - 1 - - 0 - - -17 - - - 2 - is initialized by the boost::(:link - 1 - - 0 - - -30 - - - 2 - :) copy constructor; ** if available, the exception contains the std::type_info of the original exception object, accessible through - 1 - - 0 - - -23 - - - 2 - < - 1 - - 0 - - -20 - - - 2 - >. - - - - - 0 - - -23 - - - - 13 - 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: * ErrorInfo must be an instance of the (:link - 1 - - 0 - - -5 - - - 2 - :) template. * E must be polymorphic. !!!!Returns: * If dynamic_cast<boost::(:link - 1 - - 0 - - -30 - - - 2 - :) const *>(&x) is 0, or if x does not store an object of type ErrorInfo, the returned value is null. * Otherwise, the returned pointer points to the stored value (use (:link - 1 - - 0 - - -50 - - - 2 - mod="/":) to store values in exception objects.) When x is destroyed, any pointers returned by (:link - 1 - - 0 - - -23 - - - 2 - :) become invalid. !!!!Throws: Nothing. !!!!Note: The interface of (:link - 1 - - 0 - - -23 - - - 2 - :) may be affected by the build (:link - 1 - - 0 - - -6 - - - 2 - :). - - - - - 0 - - -24 - - - - 1 - 2 - (:auto !!:) !!!Synopsis (:include synopsis:) - - - - - 0 - - -25 - - - - 5 - 2 - (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard - 1 - - 0 - - -5 - - - 2 - instance for transporting a relevant file name in exceptions deriving from boost:: - 1 - - 0 - - -30 - - - 2 - . - - - - - 0 - - -26 - - - - 7 - 2 - (:auto !!!:) Deriving from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) effectively decouples the semantics of a failure from the information that is relevant to each individual instance of reporting a failure with a given semantic. In other words: with boost::(:link - 1 - - 0 - - -30 - - - 2 - :), what data a given exception object transports depends primarily on the context in which failures are reported (not on its type.) Since exception types need no members, it becomes very natural to throw exceptions that derive from more than one type to indicate multiple appropriate semantics: [@struct exception_base: virtual std::exception, virtual boost::(:link - 1 - - 0 - - -30 - - - 2 - :) { }; struct io_error: virtual exception_base { }; struct file_error: virtual io_error { }; struct read_error: virtual io_error { }; struct file_read_error: virtual file_error, virtual read_error { };@] Using this approach, exception types become a simple tagging system for categorizing errors and selecting failures in exception handlers. - - - - - 0 - - -27 - - - - 1 - 2 - (:auto !!:) !!!Synopsis (:include synopsis:) - - - - - 0 - - -28 - - - - 7 - 2 - (:auto !!!:) (:include synopsis:) This macro takes an exception object, records BOOST_CURRENT_FUNCTION, __FILE__ and __LINE__ in it, and forwards it to - 1 - - 0 - - -35 - - - 2 - . To recover this information at the catch site, use - 1 - - 0 - - -23 - - - 2 - ; the information is also included in the message returned by - 1 - - 0 - - -74 - - - 2 - . - - - - - 0 - - -29 - - - - 3 - 2 - (:auto !!!:) (:include synopsis:) !!!!Effects: Stores a copy of v in the - 1 - - 0 - - -5 - - - 2 - object. (:include throws:) - - - - - 0 - - -30 - - - - 13 - 2 - (:auto !!!:) (:include synopsis:) Class boost::(:link - 1 - - 0 - - -30 - - - 2 - :) is designed to be used as a universal base for user-defined exception types. An object of any type deriving from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) can store data of arbitrary types, using the (:link - 1 - - 0 - - -5 - - - 2 - :) wrapper and (:link - 1 - - 0 - - -50 - - - 2 - mod="/":). To retrieve data from a boost::(:link - 1 - - 0 - - -30 - - - 2 - :) object, use the (:link - 1 - - 0 - - -23 - - - 2 - :) function template. - - - - - 0 - - -31 - - - - 1 - 2 - (:auto !!:) (:pagelist tags="hpp" except_tags="noindex":) - - - - - 0 - - -32 - - - - 5 - 2 - (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard (:link - 1 - - 0 - - -5 - - - 2 - :) instance for transporting a relevant errno value in exceptions deriving from boost::(:link - 1 - - 0 - - -30 - - - 2 - :). - - - - - 0 - - -33 - - - - 19 - 2 - (:auto !!!:) The code snippet below demonstrates how boost::(:link http://www.boost.org/libs/tuple/doc/tuple_users_guide.html|tuple:) can be used to bundle the name of the function that failed, together with the reported errno so that they can be added to exception objects more conveniently together: [@#include <(:link - 1 - - 0 - - -11 + -39 2 @@ -8871,25 +7172,7 @@ 0 - -7 - - - 2 - :)> #include <(:link - 1 - - 0 - - -58 - - - 2 - :)> #include <(:link - 1 - - 0 - - -71 + -63 2 @@ -8898,7 +7181,7 @@ 0 - -47 + -26 2 @@ -8916,7 +7199,7 @@ 0 - -30 + -16 2 @@ -8925,7 +7208,7 @@ 0 - -25 + -55 2 @@ -8934,13 +7217,1275 @@ 0 - -23 + -56 2 :). + + + 0 + + -11 + + + + 3 + 2 + (:auto !!!:) (:include decl:) !!!!Effects: Frees all resources associated with a boost::(:link + 1 + + 0 + + -16 + + + 2 + :) object. !!!!Throws: Nothing. + + + + + 0 + + -12 + + + + 1 + 2 + (:auto !!:) !!!Synopsis (:include synopsis:) + + + + + 0 + + -13 + + + + 5 + 2 + (:auto !!!:) (:include synopsis:) !!!!Effects: As if [@try { throw + 1 + + 0 + + -28 + + + 2 + (e); } catch(...) { return (:link + 1 + + 0 + + -17 + + + 2 + :)(); }@] + + + + + 0 + + -14 + + + + 1 + 2 + (:auto !:) This is an alphabetical list of all Boost Exception documentation pages. (:pagelist fmt="index" except_tags="index noindex" mod="w":) + + + + + 0 + + -15 + + + + 79 + 2 + (:auto !!:) !!!Why doesn't boost::exception derive from std::exception? Despite that (:link + 1 + + 0 + + -5 + + + 2 + |virtual inheritance should be used in deriving from base exception types:), many programmers fail to follow this principle when deriving from std::exception. If boost::(:link + 1 + + 0 + + -16 + + + 2 + :) derives from std::exception, using the (:link + 1 + + 0 + + -6 + + + 2 + :) function with such user-defined types would introduce dangerous ambiguity which would break all catch(std::exception &) statements. Of course, boost::(:link + 1 + + 0 + + -16 + + + 2 + :) should not be used to replace std::exception as a base type in exception type hierarchies. Instead, it should be included as a virtual base, in addition to std::exception (which should also be derived virtually.) !!!Why is boost::exception abstract? To prevent exception-neutral contexts from erroneously erasing the type of the original exception when adding (:link + 1 + + 0 + + -67 + + + 2 + :) to an active exception object: [@catch( boost::(:link + 1 + + 0 + + -16 + + + 2 + :) & e ) { e (:link + 1 + + 0 + + -43 + + + 2 + |<<:) foo_info(foo); throw e; //Compile error: boost::(:link + 1 + + 0 + + -16 + + + 2 + :) is abstract }@] The correct code is: [@catch( boost::(:link + 1 + + 0 + + -16 + + + 2 + :) & e ) { e (:link + 1 + + 0 + + -43 + + + 2 + |<<:) foo_info(foo); throw; //Okay, re-throwing the original exception object. }@] !!!What is the space overhead of the boost::exception base class? The space overhead for the boost::exception data members is negligible in the context of exception handling. Throwing objects that derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) does not by itself cause dynamic memory allocations. Deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) enables any data to be added to exceptions, which usually does allocate memory. However, this memory is reclaimed when the exception has been handled, and since typically user code does not allocate memory during the unrolling of the stack, adding error info to exceptions should not cause memory fragmentation. !!!Should I use boost::throw_exception or BOOST_THROW_EXCEPTION or just throw? The benefit of calling boost::(:link + 1 + + 0 + + -57 + + + 2 + :) instead of using throw directly is that it ensures that the emitted exception derives from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) and that it is compatible with boost::(:link + 1 + + 0 + + -17 + + + 2 + :). The (:link + 1 + + 0 + + -49 + + + 2 + :) macro also results in a call to boost::(:link + 1 + + 0 + + -57 + + + 2 + :), but in addition it records in the exception object the __FILE__ and __LINE__ of the throw, as well as the pretty name of the function that throws. This has virtually no overhead, yet enables boost::(:link + 1 + + 0 + + -61 + + + 2 + :) to compose a more useful, if not user-friendly message. Typical use of boost::(:link + 1 + + 0 + + -61 + + + 2 + :) is: [@catch( boost::exception & e ) { std::cerr << "OMG!" << boost::diagnostic_information(e); } catch( ... ) { std::cerr << "OMG!!!"; }@] This is a possible message it may display, the first line is only possible if (:link + 1 + + 0 + + -49 + + + 2 + :) is used: [@example_io.cpp(70): Throw in function class boost::shared_ptr<struct _iobuf> __cdecl my_fopen(const char *,const char *) Dynamic exception type: class boost::exception_detail::clone_impl<class fopen_error> std::exception::what: example_io error [struct boost::(:link + 1 + + 0 + + -26 + + + 2 + :)_ *] = fopen [struct boost::(:link + 1 + + 0 + + -32 + + + 2 + :)_ *] = 2, "No such file or directory" [struct boost::(:link + 1 + + 0 + + -55 + + + 2 + :)_ *] = tmp1.txt [struct boost::(:link + 1 + + 0 + + -66 + + + 2 + :)_ *] = rb@] !!!Why is boost::exception integrated in boost::throw_exception? The boost::(:link + 1 + + 0 + + -57 + + + 2 + :) function predates the Boost Exception library and there has been some concern about its current behavior of injecting boost::(:link + 1 + + 0 + + -16 + + + 2 + :) as a base of any exception passed to boost::(:link + 1 + + 0 + + -57 + + + 2 + :). Such concerns are dictated by the typical strict interpretation of a common principle in C and C++, that users only pay for features they actually use. The problem is that users of Boost Exception can't by themselves cause a library to throw types that derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :), and without this they can't use any of the Boost Exception facilities. For example, if a user wants to use Boost Serialization in a separate thread, it is desirable to be able to transport exceptions emitted by that library into the main thread where they can be analyzed to generate a user-friendly message. This can be easily achieved using boost::(:link + 1 + + 0 + + -53 + + + 2 + :), but this requires that Boost Serialization throws exceptions using boost::(:link + 1 + + 0 + + -28 + + + 2 + :). If Boost Serialization calls boost::(:link + 1 + + 0 + + -57 + + + 2 + :) to throw, this behavior happens automatically and transparently. The cost of this integration is: * In terms of space: a pointer and 3 ints are added to the static size of exception objects. * In terms of speed: the pointer is initialized to null at the point of the throw. * In terms of coupling: about 400 self-contained lines of C++ with no external includes. !!!Why use operator<< overload for adding info to exceptions? Before throwing an object of type that derives from boost::(:link + 1 + + 0 + + -16 + + + 2 + :), it is often desirable to add one or more (:link + 1 + + 0 + + -67 + + + 2 + :) objects in it. The syntactic sugar provided by (:link + 1 + + 0 + + -43 + + + 2 + :) allows this to be done directly in a throw expression: [@throw error() (:link + 1 + + 0 + + -43 + + + 2 + |<<:) foo_info(foo) (:link + 1 + + 0 + + -43 + + + 2 + |<<:) bar_info(bar);@] which saves typing compared to this possible alternative: [@error e; e.add(foo_info(foo)); e.add(bar_info(bar)); throw e;@] and looks better than something like: [@throw error().add(foo_info(foo)).add(bar_info(bar));@] !!!Why is operator<< allowed to throw? This question is referring to the following issue. Consider this throw statement example: [@throw file_open_error() (:link + 1 + + 0 + + -43 + + + 2 + |<<:) file_name(fn);@] The intention here is to throw a file_open_error, however if (:link + 1 + + 0 + + -43 + + + 2 + mod="/":) fails to copy the std::string contained in the file_name (:link + 1 + + 0 + + -67 + + + 2 + :) wrapper, a std::bad_alloc could propagate instead. This behavior seems undesirable to some programmers. Bjarne Stroustrup, The C++ Programming Language, 3rd Edition, page 371: ->''"Throwing an exception requires an object to throw. A C++ implementation is required to have enough spare memory to be able to throw bad_alloc in case of memory exhaustion. However, it is possible that throwing some other exception will cause memory exhaustion."'' So, an attempt to throw any exception may already result in propagating std::bad_alloc instead. + + + + + 0 + + -16 + + + + 13 + 2 + (:auto !!!:) (:include synopsis:) Class boost::(:link + 1 + + 0 + + -16 + + + 2 + :) is designed to be used as a universal base for user-defined exception types. An object of any type deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) can store data of arbitrary types, using the (:link + 1 + + 0 + + -67 + + + 2 + :) wrapper and (:link + 1 + + 0 + + -43 + + + 2 + mod="/":). To retrieve data from a boost::(:link + 1 + + 0 + + -16 + + + 2 + :) object, use the (:link + 1 + + 0 + + -56 + + + 2 + :) function template. + + + + + 0 + + -17 + + + + 33 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: The (:link + 1 + + 0 + + -17 + + + 2 + :) function must not be called outside of a catch block. !!!!Returns: * An (:link + 1 + + 0 + + -53 + + + 2 + :) that refers to the currently handled exception or a copy of the currently handled exception. * If the function needs to allocate memory and the attempt fails, it returns an (:link + 1 + + 0 + + -53 + + + 2 + :) that refers to an instance of std::bad_alloc. !!!!Throws: Nothing. !!!!Notes: * It is unspecified whether the return values of two successive calls to (:link + 1 + + 0 + + -17 + + + 2 + :) refer to the same exception object. * Correct implementation of (:link + 1 + + 0 + + -17 + + + 2 + :) may require compiler support, unless (:link + 1 + + 0 + + -28 + + + 2 + :) was used at the time the currently handled exception object was passed to throw. Whenever + 1 + + 0 + + -17 + + + 2 + fails to properly copy the current exception object, it returns an + 1 + + 0 + + -53 + + + 2 + to an object of type that is as close as possible to the original exception type, using + 1 + + 0 + + -31 + + + 2 + as a final fallback. All such types derive from boost:: + 1 + + 0 + + -16 + + + 2 + , and: ** if the original exception object derives from boost::(:link + 1 + + 0 + + -16 + + + 2 + :), then the boost::(:link + 1 + + 0 + + -16 + + + 2 + :) sub-object of the object referred to by the returned + 1 + + 0 + + -53 + + + 2 + is initialized by the boost::(:link + 1 + + 0 + + -16 + + + 2 + :) copy constructor; ** if available, the exception contains the std::type_info of the original exception object, accessible through + 1 + + 0 + + -56 + + + 2 + < + 1 + + 0 + + -8 + + + 2 + >. + + + + + 0 + + -18 + + + + 3 + 2 + (:auto !!!:) (:include synopsis:) !!!!Effects: Stores a copy of v in the + 1 + + 0 + + -67 + + + 2 + object. (:include throws:) + + + + + 0 + + -19 + + + + 1 + 2 + (:auto !!:) !!!Synopsis (:include synopsis:) + + + + + 0 + + -20 + + + + 3 + 2 + (:auto !!:) This header has been deprecated. Please #include < + 1 + + 0 + + -51 + + + 2 + > instead. + + + + + 0 + + -21 + + + + 1 + 2 + (:auto !!:) (:pagelist fmt="index" tags="function":) + + + + + 0 + + -22 + + + + 1 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: This function must not be called outside of a catch block. !!!!Returns: A pointer of type E to the current exception object, or null if the current exception object can not be converted to E *. !!!!Throws: Nothing. + + + + + 0 + + -23 + + + + 1 + 2 + (:auto !!:) !!!Synopsis (:include synopsis:) + + + + + 0 + + -24 + + + + 11 + 2 + (:auto !!:) Boost Exception supports transporting of exception objects between threads through cloning. This system is similar to (:link http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html|N2179:), but because Boost Exception can not rely on language support, the use of (:link + 1 + + 0 + + -28 + + + 2 + :) at the time of the throw is required in order to use cloning. !!!!Note: All exceptions emitted by the familiar function boost::(:link + 1 + + 0 + + -57 + + + 2 + :) are guaranteed to derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) and to support cloning. (:include + 1 + + 0 + + -25 + + + 2 + :) (:include + 1 + + 0 + + -38 + + + 2 + :) + + + + + 0 + + -25 + + + + 15 + 2 + (:auto !!!:) Here is how cloning can be enabled in a throw-expression (15.1): [@#include <(:link + 1 + + 0 + + -71 + + + 2 + :)> #include <(:link + 1 + + 0 + + -63 + + + 2 + :)> #include <stdio.h> #include <errno.h> struct file_read_error: virtual boost::(:link + 1 + + 0 + + -16 + + + 2 + :) { }; void file_read( FILE * f, void * buffer, size_t size ) { if( size!=fread(buffer,1,size,f) ) throw boost::(:link + 1 + + 0 + + -28 + + + 2 + :)(file_read_error()) << boost::(:link + 1 + + 0 + + -32 + + + 2 + :)(errno); }@] Of course, (:link + 1 + + 0 + + -28 + + + 2 + :) may be used with any exception type; there is no requirement that it should derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). + + + + + 0 + + -26 + + + + 7 + 2 + (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard (:link + 1 + + 0 + + -67 + + + 2 + :) instance for transporting the name of a relevant API function (which does not use exceptions to report errors) in exceptions deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!Example: (:include + 1 + + 0 + + -77 + + + 2 + :) + + + + + 0 + + -27 + + + + 1 + 2 + (:auto !!:) !!!Synopsis (:include synopsis:) + + + + + 0 + + -28 + + + + 21 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: * T must be a class with an accessible no-throw copy constructor. * If T has any virtual base types, those types must have an accessible default constructor. !!!!Returns: An object of ''unspecified'' type which derives publicly from T. That is, the returned object can be intercepted by a catch(T &). !!!!Description: This function is designed to be used directly in a throw-expression to enable the (:link + 1 + + 0 + + -53 + + + 2 + :) support in Boost Exception. For example: [@class my_exception: public std::exception { }; .... throw boost::(:link + 1 + + 0 + + -28 + + + 2 + :)(my_exception());@] Unless (:link + 1 + + 0 + + -28 + + + 2 + :) is called at the time an exception object is used in a throw-expression, an attempt to copy it using (:link + 1 + + 0 + + -17 + + + 2 + :) may return an (:link + 1 + + 0 + + -53 + + + 2 + :) which refers to an instance of (:link + 1 + + 0 + + -31 + + + 2 + :). See (:link + 1 + + 0 + + -17 + + + 2 + :) for details. !!!!Note: Instead of using the throw keyword directly, it is preferable to call boost::(:link + 1 + + 0 + + -57 + + + 2 + :). This is guaranteed to throw an exception that derives from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) and supports the (:link + 1 + + 0 + + -53 + + + 2 + :) functionality. + + + + + 0 + + -29 + + + + 19 + 2 + (:auto !!!:) Sometimes the throw site does not have all the information that is needed at the catch site to make sense of what went wrong. Let's say we have an exception type file_read_error, which takes a file name in its constructor. Consider the following function: [@void file_read( FILE * f, void * buffer, size_t size ) { if( size!=fread(buffer,1,size,f) ) throw file_read_error(????); }@] How can the file_read function pass a file name to the exception type constructor? All it has is a FILE handle. Using boost::(:link + 1 + + 0 + + -16 + + + 2 + :) allows us to free the file_read function from the burden of storing the file name in exceptions it throws: [@`#include <(:link + 1 + + 0 + + -51 + + + 2 + :)> #include <boost/shared_ptr.hpp> #include <stdio.h> #include <errno.h> struct file_read_error: virtual boost::(:link + 1 + + 0 + + -16 + + + 2 + :) { }; void file_read( FILE * f, void * buffer, size_t size ) { if( size!=fread(buffer,1,size,f) ) throw file_read_error() << boost::(:link + 1 + + 0 + + -32 + + + 2 + :)(errno); }@] If file_read detects a failure, it throws an exception which contains the information that is available at the time, namely the errno. Other relevant information, such as the file name, can be added in a context higher up the call stack, where it is known naturally: [@#include <(:link + 1 + + 0 + + -51 + + + 2 + :)> #include <boost/shared_ptr.hpp> #include <stdio.h> #include <string> boost::shared_ptr<FILE> file_open( char const * file_name, char const * mode ); void file_read( FILE * f, void * buffer, size_t size ); void parse_file( char const * file_name ) { boost::shared_ptr<FILE> f = file_open(file_name,"rb"); assert(f); try { char buf[1024]; file_read( f.get(), buf, sizeof(buf) ); } catch( boost::(:link + 1 + + 0 + + -16 + + + 2 + :) & e ) { e << boost::(:link + 1 + + 0 + + -55 + + + 2 + :)(file_name); throw; } }@] The above function is (almost) exception-neutral -- if an exception is emitted by any function call within the try block, parse_file does not need to do any real work, but it intercepts any boost::(:link + 1 + + 0 + + -16 + + + 2 + :) object, stores the file name, and re-throws using a throw-expression with no operand (15.1.6). The rationale for catching any boost::(:link + 1 + + 0 + + -16 + + + 2 + :) object is that the file name is relevant to any failure that occurs in parse_file, ''even if the failure is unrelated to file I/O''. + + + + + 0 + + -30 + + + + 5 + 2 + (:auto !!!:) (:include synopsis:) !!!!Definition: The expression + 1 + + 0 + + -67 + + + 2 + <Tag,T>::(:link + 1 + + 0 + + -30 + + + 2 + mod="m":) evaluates to T. + + + + + 0 + + -31 + + + + 5 + 2 + (:auto !!!:) (:include synopsis:) This type is used by the (:link + 1 + + 0 + + -53 + + + 2 + :) support in Boost Exception. Please see (:link + 1 + + 0 + + -17 + + + 2 + :). + + + + + 0 + + -32 + + + + 7 + 2 + (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard (:link + 1 + + 0 + + -67 + + + 2 + :) instance for transporting a relevant errno value in exceptions deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!Example: (:include + 1 + + 0 + + -77 + + + 2 + :) + + + + + 0 + + -33 + + + + 1 + 2 + (:auto !!!:) (:include synopsis:) !!!!Precondition: ep shall not be null. !!!!Throws: The exception to which ep refers. + + 0 @@ -8962,81 +8507,9 @@ - 17 + 1 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: E must derive publicly from std::exception. !!!!Effects: * If BOOST_NO_EXCEPTIONS is not defined, boost::(:link - 1 - - 0 - - -35 - - - 2 - :)(e) is equivalent to throw boost::(:link - 1 - - 0 - - -49 - - - 2 - :)(boost::(:link - 1 - - 0 - - -38 - - - 2 - :)(e)), unless BOOST_EXCEPTION_DISABLE is defined, in which case boost::(:link - 1 - - 0 - - -35 - - - 2 - :)(e) is equivalent to throw e; * If BOOST_NO_EXCEPTIONS is defined, the function is left undefined, and the user is expected to supply an appropriate definition. Callers of (:link - 1 - - 0 - - -35 - - - 2 - :) are allowed to assume that the function never returns; therefore, if the user-defined (:link - 1 - - 0 - - -35 - - - 2 - :) returns, the behavior is undefined. !!!!Note: Under BOOST_NO_EXCEPTIONS, unless BOOST_EXCEPTION_DISABLE is also defined, users can examine the passed exception object using boost:: - 1 - - 0 - - -23 - - - 2 - , or format an automatic diagnostic message using boost:: - 1 - - 0 - - -74 - - - 2 - . + (:auto !!:) !!!Synopsis (:include synopsis:) @@ -9047,9 +8520,36 @@ - 1 + 7 2 - (:auto !!!:) (:include synopsis:) !!!!Precondition: ep shall not be null. !!!!Throws: The exception to which ep refers. + (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard (:link + 1 + + 0 + + -67 + + + 2 + :) instance for transporting a relevant FILE pointer managed by a boost::shared_ptr<FILE> in exceptions deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!Example: (:include + 1 + + 0 + + -77 + + + 2 + :) @@ -9059,224 +8559,6 @@ -37 - - 5 - 2 - (:auto !!!:) (:include synopsis:) !!!!Effects: As if [@try { throw - 1 - - 0 - - -49 - - - 2 - (e); } catch(...) { return (:link - 1 - - 0 - - -22 - - - 2 - :)(); }@] - - - - - 0 - - -38 - - - - 5 - 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: T must be a class with an accessible no-throw copy constructor as per (15.5.1). !!!!Returns: * If T derives from boost::(:link - 1 - - 0 - - -30 - - - 2 - :), the returned object is of type T and is a copy of x. * Otherwise, the returned object is of an unspecified type that derives publicly from both T and boost::(:link - 1 - - 0 - - -30 - - - 2 - :). The T sub-object is initialized from x by the T copy constructor. !!!!Throws: Nothing. - - - - - 0 - - -39 - - - - 27 - 2 - (:auto !!:) Some exception hierarchies can not be modified to make boost::(:link - 1 - - 0 - - -30 - - - 2 - :) a base type. In this case, the (:link - 1 - - 0 - - -38 - - - 2 - :) function template can be used to make exception objects derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) anyway. Here is an example: [@#include <(:link - 1 - - 0 - - -40 - - - 2 - :)> #include <stdexcept> typedef boost::(:link - 1 - - 0 - - -5 - - - 2 - :)<struct tag_std_range_min,size_t> std_range_min; typedef boost::(:link - 1 - - 0 - - -5 - - - 2 - :)<struct tag_std_range_max,size_t> std_range_max; typedef boost::(:link - 1 - - 0 - - -5 - - - 2 - :)<struct tag_std_range_index,size_t> std_range_index; template <class T> class my_container { public: size_t size() const; T const & operator[]( size_t i ) const { if( i > size() ) throw boost::(:link - 1 - - 0 - - -38 - - - 2 - :)(std::range_error("Index out of range")) << std_range_min(0) << std_range_max(size()) << std_range_index(i); //.... } }; @] The call to (:link - 1 - - 0 - - -38 - - - 2 - :)<T> gets us an object of ''unspecified type'' which is guaranteed to derive from both boost::(:link - 1 - - 0 - - -30 - - - 2 - :) and T. This makes it possible to use (:link - 1 - - 0 - - -50 - - - 2 - mod="/":) to store additional information in the exception object. The exception can be intercepted as T &, so existing exception handling will not break. It can also be intercepted as boost::(:link - 1 - - 0 - - -30 - - - 2 - :) &, so that (:link - 1 - - 0 - - -10 - - - 2 - |more information can be added to the exception at a later time:). - - - - - 0 - - -40 - - - - 1 - 2 - (:auto !!:) !!!Synopsis (:include synopsis:) - - - - - 0 - - -41 - - - - 1 - 2 - (:auto !!:) !!!Synopsis (:include synopsis:) - - - - - 0 - - -42 - - 1 2 @@ -9287,262 +8569,13 @@ 0 - -43 + -38 - 3 + 37 2 - (:auto !!!:) (:include decl:) !!!!Effects: Frees all resources associated with a boost::(:link - 1 - - 0 - - -30 - - - 2 - :) object. !!!!Throws: Nothing. - - - - - 0 - - -44 - - - - 1 - 2 - (:auto !!:) (:pagelist tags="macro":) - - - - - 0 - - -45 - - - - 1 - 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: This function must not be called outside of a catch block. !!!!Returns: A pointer of type E to the current exception object, or null if the current exception object can not be converted to E *. !!!!Throws: Nothing. - - - - - 0 - - -46 - - - - 1 - 2 - (:auto !!:) (:pagelist fmt="index" tags="function":) - - - - - 0 - - -47 - - - - 5 - 2 - (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard - 1 - - 0 - - -5 - - - 2 - instance for transporting the name of a relevant API function (which does not use exceptions to report errors) in exceptions deriving from boost:: - 1 - - 0 - - -30 - - - 2 - . - - - - - 0 - - -48 - - - - 33 - 2 - (:auto !!!:) Traditionally, when using exceptions to report failures, the throw site: *creates an exception object of the appropriate type, and *stuffs it with data relevant to the detected error. A higher context in the program contains a catch statement which: *selects failures based on exception types, and *inspects exception objects for data required to deal with the problem. The main issue with this "traditional" approach is that often, the data available at the point of the throw is insufficient for the catch site to handle the failure. Here is an example of a catch statement: [@catch( file_read_error & e ) { std::cerr << e.file_name(); }@] And here is a possible matching throw: [@void read_file( FILE * f ) { .... size_t nr=fread(buf,1,count,f); if( ferror(f) ) throw file_read_error(???); .... }@] Clearly, the problem is that the handler requires a file name but the read_file function does not have a file name to put in the exception object; all it has is a FILE pointer! In an attempt to deal with this problem, we could modify read_file to accept a file name: [@void read_file( FILE * f, char const * name ) { .... size_t nr=fread(buf,1,count,f); if( ferror(f) ) throw file_read_error(name); .... }@] This is not a real solution: it simply shifts the burden of supplying a file name to the immediate caller of the read_file function. ->''In general, the data required to handle a given library-emitted exception depends on the program that links to it. Many contexts between the throw and the catch may have relevant information which must be transported to the exception handler.'' !!!Exception wrapping The idea of exception wrapping is to catch an exception from a lower level function (such as the read_file function above), and throw a new exception object that contains the original exception (and also carries a file name.) This method seems to be particularly popular with C++ programmers with Java background. Exception wrapping leads to the following problems: *To wrap an exception object it must be copied, which may result in slicing. *Wrapping is practically impossible to use in generic contexts. The second point is actually special case of violating the exception neutrality principle. Most contexts in a program can not handle exceptions; such contexts should not interfere with the process of exception handling. !!!The boost::exception solution *Simply derive your exception types from boost::(:link - 1 - - 0 - - -30 - - - 2 - :). *Confidently limit the throw site to provide only data that is available naturally. *Use exception-neutral contexts between the throw and the catch to augment exceptions with more relevant data as they bubble up. For example, in the throw statement below we only add the errno code, since this is the only failure-relevant information available in this context: [@struct exception_base: virtual std::exception, virtual boost::(:link - 1 - - 0 - - -30 - - - 2 - :) { }; struct io_error: virtual exception_base { }; struct file_read_error: virtual io_error { }; typedef boost::(:link - 1 - - 0 - - -5 - - - 2 - :)<struct tag_errno_code,int> errno_code; void read_file( FILE * f ) { .... size_t nr=fread(buf,1,count,f); if( ferror(f) ) throw file_read_error() (:link - 1 - - 0 - - -50 - - - 2 - |<<:) errno_code(errno); .... }@] In a higher exception-neutral context, we add the file name to ''any'' exception that derives from boost::(:link - 1 - - 0 - - -30 - - - 2 - :): [@typedef boost::(:link - 1 - - 0 - - -5 - - - 2 - :)<struct tag_file_name,std::string> file_name; .... try { if( FILE * fp=fopen("foo.txt","rt") ) { shared_ptr<FILE> f(fp,fclose); .... read_file(fp); //throws types deriving from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) do_something(); .... } else throw file_open_error() (:link - 1 - - 0 - - -50 - - - 2 - |<<:) errno_code(errno); } catch( boost::(:link - 1 - - 0 - - -30 - - - 2 - :) & e ) { e (:link - 1 - - 0 - - -50 - - - 2 - |<<:) file_name("foo.txt"); throw; }@] Finally here is how the handler retrieves data from exceptions that derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :): [@catch( io_error & e ) { std::cerr << "I/O Error!\n"; if( std::string const * fn=(:link - 1 - - 0 - - -23 - - - 2 - :)<file_name>(e) ) std::cerr << "File name: " << *fn << "\n"; if( int const * c=(:link - 1 - - 0 - - -23 - - - 2 - :)<errno_code>(e) ) std::cerr << "OS says: " << strerror(*c) << "\n"; }@] In addition, boost::(:link - 1 - - 0 - - -74 - - - 2 - :) can be used to compose an automatic (if not user-friendly) message that contains all of the (:link - 1 - - 0 - - -5 - - - 2 - :) objects added to a boost::(:link - 1 - - 0 - - -30 - - - 2 - :). This is useful for inclusion in logs and other diagnostic objects. - - - - - 0 - - -49 - - - - 21 - 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: * T must be a class with an accessible no-throw copy constructor. * If T has any virtual base types, those types must have an accessible default constructor. !!!!Returns: An object of ''unspecified'' type which derives publicly from T. That is, the returned object can be intercepted by a catch(T &). !!!!Description: This function is designed to be used directly in a throw-expression to enable the (:link + (:auto !!!:) When you catch an exception, you can call (:link 1 0 @@ -9551,34 +8584,52 @@ 2 - :) support in Boost Exception. For example: [@class my_exception: public std::exception { }; .... throw boost::(:link + :) to get an (:link 1 0 - -49 + -53 2 - :)(my_exception());@] Unless (:link + :) object: [@#include <(:link 1 0 - -49 + -9 2 - :) is called at the time an exception object is used in a throw-expression, an attempt to copy it using (:link + :)> #include <boost/thread.hpp> #include <boost/bind.hpp> void do_work(); //throws cloning-enabled boost::(:link 1 0 - -22 + -16 2 - :) may return an (:link + :)s void worker_thread( boost::(:link + 1 + + 0 + + -53 + + + 2 + :) & error ) { try { do_work(); error = boost::(:link + 1 + + 0 + + -53 + + + 2 + :)(); } catch( ... ) { error = boost::(:link 1 0 @@ -9587,43 +8638,7 @@ 2 - :) which refers to an instance of (:link - 1 - - 0 - - -65 - - - 2 - :). See (:link - 1 - - 0 - - -22 - - - 2 - :) for details. !!!!Note: Instead of using the throw keyword directly, it is preferable to call boost::(:link - 1 - - 0 - - -35 - - - 2 - :). This is guaranteed to throw an exception that derives from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) and supports the (:link + :)(); } }@] In the above example, note that (:link 1 0 @@ -9632,179 +8647,104 @@ 2 - :) functionality. + :) captures the original type of the exception object. The exception can be thrown again using the (:link + 1 + + 0 + + -33 + + + 2 + :) function: [@// ...continued void work() { boost::(:link + 1 + + 0 + + -53 + + + 2 + :) error; boost::(:link http://www.boost.org/doc/html/boost/thread.html|thread:) t( boost::(:link http://www.boost.org/libs/bind/bind.html|bind:)(worker_thread,boost::(:link http://www.boost.org/doc/html/ref.html|ref:)(error)) ); t.(:link http://www.boost.org/doc/html/boost/thread.html|join:)(); if( error ) boost::(:link + 1 + + 0 + + -33 + + + 2 + :)(error); }@] Note that (:link + 1 + + 0 + + -17 + + + 2 + :) could fail to copy the original exception object in the following cases: * if there is not enough memory, in which case the returned (:link + 1 + + 0 + + -53 + + + 2 + :) points to an instance of std::bad_alloc, or * if (:link + 1 + + 0 + + -28 + + + 2 + :) was not used in the throw-expression passed to the original throw statement and the current implementation does not have the necessary compiler-specific support to copy the exception automatically, in which case the returned (:link + 1 + + 0 + + -53 + + + 2 + :) points to an instance of (:link + 1 + + 0 + + -31 + + + 2 + :). Regardless, the use of (:link + 1 + + 0 + + -17 + + + 2 + :) and (:link + 1 + + 0 + + -33 + + + 2 + :) in the above examples is well-formed. 0 - -50 - - - - 7 - 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: E must be boost::(:link - 1 - - 0 - - -30 - - - 2 - :), or a type that derives (indirectly) from boost::(:link - 1 - - 0 - - -30 - - - 2 - :). !!!!Postcondition: A copy of v is stored into x. If x already contains data of type (:link - 1 - - 0 - - -5 - - - 2 - :)<Tag,T>, that data is overwritten. Basic exception safety guarantee. !!!!Returns: x. (:include throws:) - - - - - 0 - - -51 - - - - 19 - 2 - (:auto !!!:) Sometimes the throw site does not have all the information that is needed at the catch site to make sense of what went wrong. Let's say we have an exception type file_read_error, which takes a file name in its constructor. Consider the following function: [@void file_read( FILE * f, void * buffer, size_t size ) { if( size!=fread(buffer,1,size,f) ) throw file_read_error(????); }@] How can the file_read function pass a file name to the exception type constructor? All it has is a FILE handle. Using boost::(:link - 1 - - 0 - - -30 - - - 2 - :) allows us to free the file_read function from the burden of storing the file name in exceptions it throws: [@`#include <(:link - 1 - - 0 - - -40 - - - 2 - :)> #include <boost/shared_ptr.hpp> #include <stdio.h> #include <errno.h> struct file_read_error: virtual boost::(:link - 1 - - 0 - - -30 - - - 2 - :) { }; void file_read( FILE * f, void * buffer, size_t size ) { if( size!=fread(buffer,1,size,f) ) throw file_read_error() << boost::(:link - 1 - - 0 - - -32 - - - 2 - :)(errno); }@] If file_read detects a failure, it throws an exception which contains the information that is available at the time, namely the errno. Other relevant information, such as the file name, can be added in a context higher up the call stack, where it is known naturally: [@#include <(:link - 1 - - 0 - - -40 - - - 2 - :)> #include <boost/shared_ptr.hpp> #include <stdio.h> #include <string> boost::shared_ptr<FILE> file_open( char const * file_name, char const * mode ); void file_read( FILE * f, void * buffer, size_t size ); void parse_file( char const * file_name ) { boost::shared_ptr<FILE> f = file_open(file_name,"rb"); assert(f); try { char buf[1024]; file_read( f.get(), buf, sizeof(buf) ); } catch( boost::(:link - 1 - - 0 - - -30 - - - 2 - :) & e ) { e << boost::(:link - 1 - - 0 - - -25 - - - 2 - :)(file_name); throw; } }@] The above function is (almost) exception-neutral -- if an exception is emitted by any function call within the try block, parse_file does not need to do any real work, but it intercepts any boost::(:link - 1 - - 0 - - -30 - - - 2 - :) object, stores the file name, and re-throws using a throw-expression with no operand (15.1.6). The rationale for catching any boost::(:link - 1 - - 0 - - -30 - - - 2 - :) object is that the file name is relevant to any failure that occurs in parse_file, ''even if the failure is unrelated to file I/O''. - - - - - 0 - - -52 - - - - 5 - 2 - (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard - 1 - - 0 - - -5 - - - 2 - instance for transporting strings returned by std::type_info::name in exceptions deriving from boost:: - 1 - - 0 - - -30 - - - 2 - objects. - - - - - 0 - - -53 + -39 @@ -9817,7 +8757,149 @@ 0 - -54 + -40 + + + + 5 + 2 + (:auto !!!:) (:include synopsis:) !!!!Description: Returns a const reference to the copy of the value passed to (:link + 1 + + 0 + + -67 + + + 2 + :)'s constructor stored in the (:link + 1 + + 0 + + -67 + + + 2 + :) object. !!!!Throws: Nothing. + + + + + 0 + + -41 + + + + 5 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: E must be boost::(:link + 1 + + 0 + + -16 + + + 2 + :), or a type that derives (indirectly) from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!!Effects: Equivalent to x << v.(:link http://www.boost.org/libs/tuple/doc/tuple_users_guide.html#accessing_elements|get:)<0>() << ... << v.(:link http://www.boost.org/libs/tuple/doc/tuple_users_guide.html#accessing_elements|get:)<N>(). !!!!Returns: x. (:include throws:) + + + + + 0 + + -42 + + + + 7 + 2 + (:auto !!!:) (:include decl:) !!!!Effects: * Default constructor: initializes an empty boost::(:link + 1 + + 0 + + -16 + + + 2 + :) object. * Copy constructor: initializes a boost::(:link + 1 + + 0 + + -16 + + + 2 + :) object which shares ownership with x of all data added through (:link + 1 + + 0 + + -43 + + + 2 + mod="/":), including data that is added at a future time. !!!!Throws: Nothing. + + + + + 0 + + -43 + + + + 7 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: E must be boost::(:link + 1 + + 0 + + -16 + + + 2 + :), or a type that derives (indirectly) from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!!Postcondition: A copy of v is stored into x. If x already contains data of type (:link + 1 + + 0 + + -67 + + + 2 + :)<Tag,T>, that data is overwritten. Basic exception safety guarantee. !!!!Returns: x. (:include throws:) + + + + + 0 + + -44 @@ -9828,7 +8910,7 @@ 0 - -63 + -24 2 @@ -9837,7 +8919,7 @@ 0 - -35 + -57 2 @@ -9846,48 +8928,12 @@ 0 - -48 + -45 2 :) #Tutorial ##(:link 1 - - 0 - - -10 - - - 2 - mod="w":) ##(:link - 1 - - 0 - - -39 - - - 2 - mod="w":) ##(:link - 1 - - 0 - - -63 - - - 2 - mod="w":) ##(:link - 1 - - 0 - - -26 - - - 2 - mod="w":) ##(:link - 1 0 @@ -9900,38 +8946,29 @@ 0 - -12 + -47 2 - mod="w":) #Documentation ##Class (:link + mod="w":) ##(:link 1 0 - -30 + -24 2 - :) ##Throwing Exceptions ###(:link + mod="w":) ##(:link 1 0 - -28 + -46 2 - :) ###(:link - 1 - - 0 - - -35 - - - 2 - :) ##Transporting of Arbitrary Data to the Catch Site ###(:link + mod="w":) ##(:link 1 0 @@ -9940,52 +8977,25 @@ 2 - :) ###(:link + mod="w":) ##(:link 1 0 - -50 + -74 2 - :) ###(:link + mod="w":) #Documentation ##Class (:link 1 0 - -68 + -16 2 - :) ###(:link - 1 - - 0 - - -23 - - - 2 - :) ###(:link - 1 - - 0 - - -38 - - - 2 - :) ##(:link http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html|N2179:) Transporting of Exceptions between Threads ###(:link - 1 - - 0 - - -17 - - - 2 - :) ###(:link + :) ##Throwing Exceptions ###(:link 1 0 @@ -9999,7 +9009,16 @@ 0 - -22 + -57 + + + 2 + :) ##Transporting of Arbitrary Data to the Catch Site ###(:link + 1 + + 0 + + -67 2 @@ -10008,7 +9027,7 @@ 0 - -37 + -43 2 @@ -10017,7 +9036,7 @@ 0 - -36 + -41 2 @@ -10026,16 +9045,7 @@ 0 - -65 - - - 2 - :) ##Diagnostic Information ###(:link - 1 - - 0 - - -74 + -56 2 @@ -10044,20 +9054,38 @@ 0 - -66 + -6 2 - :) ##(:link + :) ##(:link http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html|N2179:) Transporting of Exceptions between Threads ###(:link 1 0 - -45 + -53 2 - :) #API ##(:link + :) ###(:link + 1 + + 0 + + -28 + + + 2 + :) ###(:link + 1 + + 0 + + -17 + + + 2 + :) ###(:link 1 0 @@ -10066,7 +9094,16 @@ 2 - :) ##(:link + :) ###(:link + 1 + + 0 + + -33 + + + 2 + :) ###(:link 1 0 @@ -10075,6 +9112,51 @@ 2 + :) ##Diagnostic Information ###(:link + 1 + + 0 + + -61 + + + 2 + :) ###(:link + 1 + + 0 + + -50 + + + 2 + :) ##(:link + 1 + + 0 + + -22 + + + 2 + :) #API ##(:link + 1 + + 0 + + -75 + + + 2 + :) ##(:link + 1 + + 0 + + -76 + + + 2 :) ##(:link 1 @@ -10086,42 +9168,6 @@ 2 :) ##(:link 1 - - 0 - - -46 - - - 2 - :) ##(:link - 1 - - 0 - - -44 - - - 2 - :) ##(:link - 1 - - 0 - - -6 - - - 2 - mod="w":) #(:link - 1 - - 0 - - -18 - - - 2 - mod="w":) #(:link - 1 0 @@ -10129,6 +9175,42 @@ 2 + :) ##(:link + 1 + + 0 + + -59 + + + 2 + :) ##(:link + 1 + + 0 + + -68 + + + 2 + mod="w":) #(:link + 1 + + 0 + + -15 + + + 2 + mod="w":) #(:link + 1 + + 0 + + -14 + + + 2 mod="w":) !!!Acknowledgements Thanks to Peter Dimov for his continuing help. Also thanks to Tobias Schwinger, Tom Brinkman, Pavel Vozenilek and everyone who participated in the review process. @@ -10136,38 +9218,337 @@ 0 - -55 + -45 - 5 + 33 2 - (:auto !!!:) (:include synopsis:) !!!!Definition: The expression + (:auto !!!:) Traditionally, when using exceptions to report failures, the throw site: *creates an exception object of the appropriate type, and *stuffs it with data relevant to the detected error. A higher context in the program contains a catch statement which: *selects failures based on exception types, and *inspects exception objects for data required to deal with the problem. The main issue with this "traditional" approach is that often, the data available at the point of the throw is insufficient for the catch site to handle the failure. Here is an example of a catch statement: [@catch( file_read_error & e ) { std::cerr << e.file_name(); }@] And here is a possible matching throw: [@void read_file( FILE * f ) { .... size_t nr=fread(buf,1,count,f); if( ferror(f) ) throw file_read_error(???); .... }@] Clearly, the problem is that the handler requires a file name but the read_file function does not have a file name to put in the exception object; all it has is a FILE pointer! In an attempt to deal with this problem, we could modify read_file to accept a file name: [@void read_file( FILE * f, char const * name ) { .... size_t nr=fread(buf,1,count,f); if( ferror(f) ) throw file_read_error(name); .... }@] This is not a real solution: it simply shifts the burden of supplying a file name to the immediate caller of the read_file function. ->''In general, the data required to handle a given library-emitted exception depends on the program that links to it. Many contexts between the throw and the catch may have relevant information which must be transported to the exception handler.'' !!!Exception wrapping The idea of exception wrapping is to catch an exception from a lower level function (such as the read_file function above), and throw a new exception object that contains the original exception (and also carries a file name.) This method seems to be particularly popular with C++ programmers with Java background. Exception wrapping leads to the following problems: *To wrap an exception object it must be copied, which may result in slicing. *Wrapping is practically impossible to use in generic contexts. The second point is actually special case of violating the exception neutrality principle. Most contexts in a program can not handle exceptions; such contexts should not interfere with the process of exception handling. !!!The boost::exception solution *Simply derive your exception types from boost::(:link 1 0 - -5 + -16 2 - <Tag,T>::(:link + :). *Confidently limit the throw site to provide only data that is available naturally. *Use exception-neutral contexts between the throw and the catch to augment exceptions with more relevant data as they bubble up. For example, in the throw statement below we only add the errno code, since this is the only failure-relevant information available in this context: [@struct exception_base: virtual std::exception, virtual boost::(:link 1 0 - -55 + -16 2 - mod="m":) evaluates to T. + :) { }; struct io_error: virtual exception_base { }; struct file_read_error: virtual io_error { }; typedef boost::(:link + 1 + + 0 + + -67 + + + 2 + :)<struct tag_errno_code,int> errno_code; void read_file( FILE * f ) { .... size_t nr=fread(buf,1,count,f); if( ferror(f) ) throw file_read_error() (:link + 1 + + 0 + + -43 + + + 2 + |<<:) errno_code(errno); .... }@] In a higher exception-neutral context, we add the file name to ''any'' exception that derives from boost::(:link + 1 + + 0 + + -16 + + + 2 + :): [@typedef boost::(:link + 1 + + 0 + + -67 + + + 2 + :)<struct tag_file_name,std::string> file_name; .... try { if( FILE * fp=fopen("foo.txt","rt") ) { shared_ptr<FILE> f(fp,fclose); .... read_file(fp); //throws types deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) do_something(); .... } else throw file_open_error() (:link + 1 + + 0 + + -43 + + + 2 + |<<:) errno_code(errno); } catch( boost::(:link + 1 + + 0 + + -16 + + + 2 + :) & e ) { e (:link + 1 + + 0 + + -43 + + + 2 + |<<:) file_name("foo.txt"); throw; }@] Finally here is how the handler retrieves data from exceptions that derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :): [@catch( io_error & e ) { std::cerr << "I/O Error!\n"; if( std::string const * fn=(:link + 1 + + 0 + + -56 + + + 2 + :)<file_name>(e) ) std::cerr << "File name: " << *fn << "\n"; if( int const * c=(:link + 1 + + 0 + + -56 + + + 2 + :)<errno_code>(e) ) std::cerr << "OS says: " << strerror(*c) << "\n"; }@] In addition, boost::(:link + 1 + + 0 + + -61 + + + 2 + :) can be used to compose an automatic (if not user-friendly) message that contains all of the (:link + 1 + + 0 + + -67 + + + 2 + :) objects added to a boost::(:link + 1 + + 0 + + -16 + + + 2 + :). This is useful for inclusion in logs and other diagnostic objects. 0 - -56 + -48 + + + + 5 + 2 + (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard + 1 + + 0 + + -67 + + + 2 + instance for transporting strings returned by std::type_info::name in exceptions deriving from boost:: + 1 + + 0 + + -16 + + + 2 + objects. + + + + + 0 + + -49 + + + + 7 + 2 + (:auto !!!:) (:include synopsis:) This macro takes an exception object, records BOOST_CURRENT_FUNCTION, __FILE__ and __LINE__ in it, and forwards it to + 1 + + 0 + + -57 + + + 2 + . To recover this information at the catch site, use + 1 + + 0 + + -56 + + + 2 + ; the information is also included in the message returned by + 1 + + 0 + + -61 + + + 2 + . + + + + + 0 + + -50 + + + + 9 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: This function must not be called outside of a catch block. !!!!Returns: If the current exception object can be converted to boost::(:link + 1 + + 0 + + -16 + + + 2 + :) or std::exception, this function returns the same string value returned by (:link + 1 + + 0 + + -61 + + + 2 + :) for the current exception object. Otherwise, an unspecified non-empty string is returned. Typical use is to call + 1 + + 0 + + -50 + + + 2 + from a top-level function to output diagnostic information about unhandled exceptions: [@int main() { try { run_program(); } catch( error & e ) { //handle error } catch( ...) { std::cerr << "Unhandled exception!" << std::endl << boost:: + 1 + + 0 + + -50 + + + 2 + (); } }@] + + + + + 0 + + -46 + + + + 7 + 2 + (:auto !!!:) Deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) effectively decouples the semantics of a failure from the information that is relevant to each individual instance of reporting a failure with a given semantic. In other words: with boost::(:link + 1 + + 0 + + -16 + + + 2 + :), what data a given exception object transports depends primarily on the context in which failures are reported (not on its type.) Since exception types need no members, it becomes very natural to throw exceptions that derive from more than one type to indicate multiple appropriate semantics: [@struct exception_base: virtual std::exception, virtual boost::(:link + 1 + + 0 + + -16 + + + 2 + :) { }; struct io_error: virtual exception_base { }; struct file_error: virtual io_error { }; struct read_error: virtual io_error { }; struct file_read_error: virtual file_error, virtual read_error { };@] Using this approach, exception types become a simple tagging system for categorizing errors and selecting failures in exception handlers. + + + + + 0 + + -51 + + + + 1 + 2 + (:auto !!:) !!!Synopsis (:include synopsis:) + + + + + 0 + + -52 @@ -10180,7 +9561,258 @@ 0 - -57 + -53 + + + + 25 + 2 + (:auto !!!:) (:include synopsis:) The (:link + 1 + + 0 + + -53 + + + 2 + :) type can be used to refer to a copy of an exception object. It is Default Constructible, Copy Constructible, Assignable and Equality Comparable; (:link + 1 + + 0 + + -53 + + + 2 + :)'s operations do not throw. The referenced object remains valid at least as long as there is an (:link + 1 + + 0 + + -53 + + + 2 + :) object that refers to it. Two instances of (:link + 1 + + 0 + + -53 + + + 2 + :) are equivalent and compare equal if and only if they refer to the same exception. The default constructor of (:link + 1 + + 0 + + -53 + + + 2 + :) produces the null value of the type. The null value is equivalent only to itself. !!!!Thread safety * It is legal for multiple threads to hold (:link + 1 + + 0 + + -53 + + + 2 + :) references to the same exception object. * It is illegal for multiple threads to modify the same (:link + 1 + + 0 + + -53 + + + 2 + :) object concurrently. * While calling (:link + 1 + + 0 + + -17 + + + 2 + :) makes a copy of the current exception object, it is still possible for the two copies to share internal state. Therefore, in general it is not safe to call (:link + 1 + + 0 + + -33 + + + 2 + :) concurrently to throw the same exception object into multiple threads. !!!!Nesting of exceptions: An (:link + 1 + + 0 + + -53 + + + 2 + :) can be added as (:link + 1 + + 0 + + -67 + + + 2 + :) to any boost::(:link + 1 + + 0 + + -16 + + + 2 + :). This is a convenient way to nest exceptions. There is no limit on the depth of the nesting, however cyclic references result in undefined behavior. + + + + + 0 + + -47 + + + + 27 + 2 + (:auto !!:) Some exception hierarchies can not be modified to make boost::(:link + 1 + + 0 + + -16 + + + 2 + :) a base type. In this case, the (:link + 1 + + 0 + + -6 + + + 2 + :) function template can be used to make exception objects derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) anyway. Here is an example: [@#include <(:link + 1 + + 0 + + -51 + + + 2 + :)> #include <stdexcept> typedef boost::(:link + 1 + + 0 + + -67 + + + 2 + :)<struct tag_std_range_min,size_t> std_range_min; typedef boost::(:link + 1 + + 0 + + -67 + + + 2 + :)<struct tag_std_range_max,size_t> std_range_max; typedef boost::(:link + 1 + + 0 + + -67 + + + 2 + :)<struct tag_std_range_index,size_t> std_range_index; template <class T> class my_container { public: size_t size() const; T const & operator[]( size_t i ) const { if( i > size() ) throw boost::(:link + 1 + + 0 + + -6 + + + 2 + :)(std::range_error("Index out of range")) << std_range_min(0) << std_range_max(size()) << std_range_index(i); //.... } }; @] The call to (:link + 1 + + 0 + + -6 + + + 2 + :)<T> gets us an object of ''unspecified type'' which is guaranteed to derive from both boost::(:link + 1 + + 0 + + -16 + + + 2 + :) and T. This makes it possible to use (:link + 1 + + 0 + + -43 + + + 2 + mod="/":) to store additional information in the exception object. The exception can be intercepted as T &, so existing exception handling will not break. It can also be intercepted as boost::(:link + 1 + + 0 + + -16 + + + 2 + :) &, so that (:link + 1 + + 0 + + -69 + + + 2 + |more information can be added to the exception at a later time:). + + + + + 0 + + -54 @@ -10189,6 +9821,198 @@ (:auto !!:) !!!Synopsis (:include synopsis:) + + + 0 + + -55 + + + + 7 + 2 + (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard (:link + 1 + + 0 + + -67 + + + 2 + :) instance for transporting a relevant file name in exceptions deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!Example: (:include + 1 + + 0 + + -77 + + + 2 + :) + + + + + 0 + + -56 + + + + 13 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: * ErrorInfo must be an instance of the (:link + 1 + + 0 + + -67 + + + 2 + :) template. * E must be polymorphic. !!!!Returns: * If dynamic_cast<boost::(:link + 1 + + 0 + + -16 + + + 2 + :) const *>(&x) is 0, or if x does not store an object of type ErrorInfo, the returned value is null. * Otherwise, the returned pointer points to the stored value (use (:link + 1 + + 0 + + -43 + + + 2 + mod="/":) to store values in exception objects.) When x is destroyed, any pointers returned by (:link + 1 + + 0 + + -56 + + + 2 + :) become invalid. !!!!Throws: Nothing. !!!!Note: The interface of (:link + 1 + + 0 + + -56 + + + 2 + :) may be affected by the build (:link + 1 + + 0 + + -68 + + + 2 + :). + + + + + 0 + + -57 + + + + 17 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: E must derive publicly from std::exception. !!!!Effects: * If BOOST_NO_EXCEPTIONS is not defined, boost::(:link + 1 + + 0 + + -57 + + + 2 + :)(e) is equivalent to throw boost::(:link + 1 + + 0 + + -28 + + + 2 + :)(boost::(:link + 1 + + 0 + + -6 + + + 2 + :)(e)), unless BOOST_EXCEPTION_DISABLE is defined, in which case boost::(:link + 1 + + 0 + + -57 + + + 2 + :)(e) is equivalent to throw e; * If BOOST_NO_EXCEPTIONS is defined, the function is left undefined, and the user is expected to supply an appropriate definition. Callers of (:link + 1 + + 0 + + -57 + + + 2 + :) are allowed to assume that the function never returns; therefore, if the user-defined (:link + 1 + + 0 + + -57 + + + 2 + :) returns, the behavior is undefined. !!!!Note: Under BOOST_NO_EXCEPTIONS, unless BOOST_EXCEPTION_DISABLE is also defined, users can examine the passed exception object using boost:: + 1 + + 0 + + -56 + + + 2 + , or format an automatic diagnostic message using boost:: + 1 + + 0 + + -61 + + + 2 + . + + 0 @@ -10210,27 +10034,9 @@ - 5 + 1 2 - (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard - 1 - - 0 - - -5 - - - 2 - instance for transporting a relevant FILE pointer managed by a boost::shared_ptr<FILE> in exceptions deriving from boost:: - 1 - - 0 - - -30 - - - 2 - . + (:auto !!:) (:pagelist tags="macro":) @@ -10240,212 +10046,6 @@ -60 - - 5 - 2 - (:auto !!!:) (:include synopsis:) !!!!Description: Returns a const reference to the copy of the value passed to (:link - 1 - - 0 - - -5 - - - 2 - :)'s constructor stored in the (:link - 1 - - 0 - - -5 - - - 2 - :) object. !!!!Throws: Nothing. - - - - - 0 - - -61 - - - - 37 - 2 - (:auto !!!:) When you catch an exception, you can call (:link - 1 - - 0 - - -22 - - - 2 - :) to get an (:link - 1 - - 0 - - -17 - - - 2 - :) object: [@#include <(:link - 1 - - 0 - - -27 - - - 2 - :)> #include <boost/thread.hpp> #include <boost/bind.hpp> void do_work(); //throws cloning-enabled boost::(:link - 1 - - 0 - - -30 - - - 2 - :)s void worker_thread( boost::(:link - 1 - - 0 - - -17 - - - 2 - :) & error ) { try { do_work(); error = boost::(:link - 1 - - 0 - - -17 - - - 2 - :)(); } catch( ... ) { error = boost::(:link - 1 - - 0 - - -22 - - - 2 - :)(); } }@] In the above example, note that (:link - 1 - - 0 - - -22 - - - 2 - :) captures the original type of the exception object. The exception can be thrown again using the (:link - 1 - - 0 - - -36 - - - 2 - :) function: [@// ...continued void work() { boost::(:link - 1 - - 0 - - -17 - - - 2 - :) error; boost::(:link http://www.boost.org/doc/html/boost/thread.html|thread:) t( boost::(:link http://www.boost.org/libs/bind/bind.html|bind:)(worker_thread,boost::(:link http://www.boost.org/doc/html/ref.html|ref:)(error)) ); t.(:link http://www.boost.org/doc/html/boost/thread.html|join:)(); if( error ) boost::(:link - 1 - - 0 - - -36 - - - 2 - :)(error); }@] Note that (:link - 1 - - 0 - - -22 - - - 2 - :) could fail to copy the original exception object in the following cases: * if there is not enough memory, in which case the returned (:link - 1 - - 0 - - -17 - - - 2 - :) points to an instance of std::bad_alloc, or * if (:link - 1 - - 0 - - -49 - - - 2 - :) was not used in the throw-expression passed to the original throw statement and the current implementation does not have the necessary compiler-specific support to copy the exception automatically, in which case the returned (:link - 1 - - 0 - - -17 - - - 2 - :) points to an instance of (:link - 1 - - 0 - - -65 - - - 2 - :). Regardless, the use of (:link - 1 - - 0 - - -22 - - - 2 - :) and (:link - 1 - - 0 - - -36 - - - 2 - :) in the above examples is well-formed. - - - - - 0 - - -62 - - 1 2 @@ -10456,40 +10056,22 @@ 0 - -63 + -61 - 11 + 37 2 - (:auto !!:) Boost Exception supports transporting of exception objects between threads through cloning. This system is similar to (:link http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html|N2179:), but because Boost Exception can not rely on language support, the use of (:link + (:auto !!!:) (:include synopsis:) !!!!Returns: A string value that contains varying amount of implementation-specific diagnostic information about the passed object: *If E can be statically converted to boost::(:link 1 0 - -49 + -16 2 - :) at the time of the throw is required in order to use cloning. !!!!Note: All exceptions emitted by the familiar function boost::(:link - 1 - - 0 - - -35 - - - 2 - :) are guaranteed to derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :) and to support cloning. (:include + :), the returned value contains the string representations of all (:link 1 0 @@ -10498,7 +10080,34 @@ 2 - :) (:include + :) objects stored in the boost::(:link + 1 + + 0 + + -16 + + + 2 + :) through (:link + 1 + + 0 + + -43 + + + 2 + mod="/":), along with other diagnostic information relevant to the exception. If e can be dynamically converted to std::exception, the returned value also contains the what() string. *Otherwise, if E can be statically converted std::exception: **if e can be dynamically converted to boost::exception, the returned value is the same as if E could be statically converted to boost::(:link + 1 + + 0 + + -16 + + + 2 + :); **otherwise the returned value contains the what() string. *Otherwise, the boost::(:link 1 0 @@ -10507,6 +10116,114 @@ 2 + :) template is not available. The string representation of each (:link + 1 + + 0 + + -67 + + + 2 + :) object is deduced by a function call that is bound at the time the (:link + 1 + + 0 + + -67 + + + 2 + :)<Tag,T> template is instantiated. The following overload resolutions are attempted in order: #Unqualified call to to_string(x), where x is of type (:link + 1 + + 0 + + -67 + + + 2 + :)<Tag,T> (the return value is expected to be of type std::string.) #Unqualified call to to_string(x.(:link + 1 + + 0 + + -40 + + + 2 + mod="m":)()) (the return value is expected to be of type std::string.) #Unqualified call to s << x.(:link + 1 + + 0 + + -40 + + + 2 + mod="m":)(), where s is a std::ostringstream. The first successfully bound function is used at the time (:link + 1 + + 0 + + -61 + + + 2 + :) is called; if all 3 overload resolutions are unsuccessful, the system is unable to convert the (:link + 1 + + 0 + + -67 + + + 2 + :) object to string, and ''an unspecified stub string value is used without issuing a compile error.'' The + 1 + + 0 + + -53 + + + 2 + overload of + 1 + + 0 + + -61 + + + 2 + is equivalent to: [@if( p ) try { + 1 + + 0 + + -33 + + + 2 + (p); } catch(...) { return + 1 + + 0 + + -50 + + + 2 + (); } else return <unspecified-string-value>;@] !!!!Notes: *The format of the returned string is unspecified. *The returned string is ''not'' user-friendly. *The returned string may include additional platform-specific diagnostic information. (:include + 1 + + 0 + + -7 + + + 2 :) @@ -10514,265 +10231,7 @@ 0 - -64 - - - - 7 - 2 - (:auto !!!:) (:include decl:) !!!!Effects: * Default constructor: initializes an empty boost::(:link - 1 - - 0 - - -30 - - - 2 - :) object. * Copy constructor: initializes a boost::(:link - 1 - - 0 - - -30 - - - 2 - :) object which shares ownership with x of all data added through (:link - 1 - - 0 - - -50 - - - 2 - mod="/":), including data that is added at a future time. !!!!Throws: Nothing. - - - - - 0 - - -65 - - - - 5 - 2 - (:auto !!!:) (:include synopsis:) This type is used by the (:link - 1 - - 0 - - -17 - - - 2 - :) support in Boost Exception. Please see (:link - 1 - - 0 - - -22 - - - 2 - :). - - - - - 0 - - -66 - - - - 9 - 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: This function must not be called outside of a catch block. !!!!Returns: If the current exception object can be converted to boost::(:link - 1 - - 0 - - -30 - - - 2 - :) or std::exception, this function returns the same string value returned by (:link - 1 - - 0 - - -74 - - - 2 - :) for the current exception object. Otherwise, an unspecified non-empty string is returned. Typical use is to call - 1 - - 0 - - -66 - - - 2 - from a top-level function to output diagnostic information about unhandled exceptions: [@int main() { try { run_program(); } catch( error & e ) { //handle error } catch( ...) { std::cerr << "Unhandled exception!" << std::endl << boost:: - 1 - - 0 - - -66 - - - 2 - (); } }@] - - - - - 0 - - -67 - - - - 15 - 2 - (:auto !!!:) Here is how cloning can be enabled in a throw-expression (15.1): [@#include <(:link - 1 - - 0 - - -8 - - - 2 - :)> #include <(:link - 1 - - 0 - - -71 - - - 2 - :)> #include <stdio.h> #include <errno.h> struct file_read_error: virtual boost::(:link - 1 - - 0 - - -30 - - - 2 - :) { }; void file_read( FILE * f, void * buffer, size_t size ) { if( size!=fread(buffer,1,size,f) ) throw boost::(:link - 1 - - 0 - - -49 - - - 2 - :)(file_read_error()) << boost::(:link - 1 - - 0 - - -32 - - - 2 - :)(errno); }@] Of course, (:link - 1 - - 0 - - -49 - - - 2 - :) may be used with any exception type; there is no requirement that it should derive from boost::(:link - 1 - - 0 - - -30 - - - 2 - :). - - - - - 0 - - -68 - - - - 5 - 2 - (:auto !!!:) (:include synopsis:) !!!!Requirements: E must be boost::(:link - 1 - - 0 - - -30 - - - 2 - :), or a type that derives (indirectly) from boost::(:link - 1 - - 0 - - -30 - - - 2 - :). !!!!Effects: Equivalent to x << v.(:link http://www.boost.org/libs/tuple/doc/tuple_users_guide.html#accessing_elements|get:)<0>() << ... << v.(:link http://www.boost.org/libs/tuple/doc/tuple_users_guide.html#accessing_elements|get:)<N>(). !!!!Returns: x. (:include throws:) - - - - - 0 - - -69 - - - - 5 - 2 - (:auto !!!:) Exception types should use virtual inheritance when deriving from other exception types. This insight is due to Andrew Koenig. Using virtual inheritance prevents ambiguity problems in the exception handler: [@#include <iostream> struct my_exc1 : std::exception { char const* what() const throw(); }; struct my_exc2 : std::exception { char const* what() const throw(); }; struct your_exc3 : my_exc1, my_exc2 {}; int main() { try { throw your_exc3(); } catch(std::exception const& e) {} catch(...) { std::cout << "whoops!" << std::endl; } }@] The program above outputs "whoops!" because the conversion to std::exception is ambiguous. The overhead introduced by virtual inheritance is always negligible in the context of exception handling. Note that virtual bases are initialized directly by the constructor of the most-derived-type (the type passed to the throw statement, in case of exceptions.) However, typically this detail is of no concern when boost::(:link - 1 - - 0 - - -30 - - - 2 - :) is used, because it enables exception types to be trivial structs with no members (there's nothing to initialize.) See (:link - 1 - - 0 - - -26 - - - 2 - mod="w":). - - - - - 0 - - -70 + -62 @@ -10783,7 +10242,7 @@ 0 - -40 + -51 2 @@ -10792,7 +10251,7 @@ 0 - -5 + -67 2 @@ -10801,7 +10260,7 @@ 0 - -30 + -16 2 @@ -10810,7 +10269,7 @@ 0 - -5 + -67 2 @@ -10819,7 +10278,7 @@ 0 - -30 + -16 2 @@ -10828,7 +10287,7 @@ 0 - -50 + -43 2 @@ -10837,7 +10296,7 @@ 0 - -23 + -56 2 @@ -10846,13 +10305,477 @@ 0 - -23 + -56 2 :) function template is instantiated with the typedef from (1), and is passed an exception object of a polymorphic type. If the exception object contains the requested value, err will point to it; otherwise a null pointer is returned. + + + 0 + + -63 + + + + 1 + 2 + (:auto !!:) !!!Synopsis (:include synopsis:) + + + + + 0 + + -64 + + + + 1 + 2 + (:auto !!:) !!!Synopsis (:include synopsis:) + + + + + 0 + + -65 + + + + 7 + 2 + (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard (:link + 1 + + 0 + + -67 + + + 2 + :) instance for transporting a relevant text file line number, for example in parse error exceptions deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!Example: (:include + 1 + + 0 + + -77 + + + 2 + :) + + + + + 0 + + -66 + + + + 7 + 2 + (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard (:link + 1 + + 0 + + -67 + + + 2 + :) instance for transporting the string passed as a second argument to fopen in exceptions indicating fopen failures and deriving from boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!Example: (:include + 1 + + 0 + + -77 + + + 2 + :) + + + + + 0 + + -67 + + + + 41 + 2 + (:auto !!!:) (:include synopsis:) !!!!Requirements: T must have accessible copy constructor and must not be a reference (there is no requirement that T's copy constructor does not throw.) !!!!Description: This class template is used to associate a Tag type with a value type T. Objects of type (:link + 1 + + 0 + + -67 + + + 2 + :)<Tag,T> can be passed to (:link + 1 + + 0 + + -43 + + + 2 + mod="/":) to be stored in objects of type boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!!Usage: The header <(:link + 1 + + 0 + + -60 + + + 2 + :)> provides a declaration of the (:link + 1 + + 0 + + -67 + + + 2 + :) template, which is sufficient for the purpose of typedefing an instance for specific Tag and T, for example: [@#include <(:link + 1 + + 0 + + -60 + + + 2 + :)> struct tag_errno; typedef boost::(:link + 1 + + 0 + + -67 + + + 2 + :)<tag_errno,int> errno_info;@] Or, the shorter equivalent: [@#include <(:link + 1 + + 0 + + -60 + + + 2 + :)> typedef boost::(:link + 1 + + 0 + + -67 + + + 2 + :)<struct tag_errno,int> errno_info;@] This errno_info typedef can be passed to (:link + 1 + + 0 + + -43 + + + 2 + mod="/":) (#include <(:link + 1 + + 0 + + -71 + + + 2 + :)> first) to store an int named tag_errno in exceptions of types that derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :): [@throw file_read_error() (:link + 1 + + 0 + + -43 + + + 2 + |<<:) errno_info(errno);@] It can also be passed to (:link + 1 + + 0 + + -56 + + + 2 + :) (#include <(:link + 1 + + 0 + + -27 + + + 2 + :)> first) to retrieve the tag_errno int from a boost::(:link + 1 + + 0 + + -16 + + + 2 + :): [@catch( boost::(:link + 1 + + 0 + + -16 + + + 2 + :) & x ) { if( int const * e=boost::(:link + 1 + + 0 + + -56 + + + 2 + :)<errno_info>(x) ) .... }@] For convenience and uniformity, Boost Exception defines the following commonly used (:link + 1 + + 0 + + -67 + + + 2 + :) typedefs, ready for use with (:link + 1 + + 0 + + -43 + + + 2 + mod="/":): (:pagelist tags="error_info_instance":) + + + + + 0 + + -68 + + + + 19 + 2 + (:auto !!:) Boost Exception responds to the following configuration macros: '''BOOST_NO_RTTI'''\\ '''BOOST_NO_TYPEID''' The first macro prevents Boost Exception from using dynamic_cast and dynamic typeid. If the second macro is also defined, Boost Exception does not use static typeid either. There are no observable degrading effects on the library functionality, except for the following: ->By default, the (:link + 1 + + 0 + + -56 + + + 2 + :) function template can be called with any exception type. If BOOST_NO_RTTI is defined, (:link + 1 + + 0 + + -56 + + + 2 + :) can be used only with objects of type boost::(:link + 1 + + 0 + + -16 + + + 2 + :). !!!!Note: The library needs RTTI functionality. Disabling the language RTTI support enables an internal RTTI system, which may have more or less overhead depending on the platform. '''BOOST_EXCEPTION_DISABLE''' By default, (:link + 1 + + 0 + + -28 + + + 2 + :) and (:link + 1 + + 0 + + -6 + + + 2 + :) are integrated directly in the (:link + 1 + + 0 + + -57 + + + 2 + :) function. Defining BOOST_EXCEPTION_DISABLE disables this integration. Note that on some non-conformant compilers, for example MSVC 7.0 and older, as well as BCC, BOOST_EXCEPTION_DISABLE is implicitly defined in (:link + 1 + + 0 + + -54 + + + 2 + :). '''BOOST_NO_EXCEPTIONS''' This macro disables exception handling in Boost, forwarding all exceptions to a user-defined non-template version of boost:: + 1 + + 0 + + -57 + + + 2 + . However, unless BOOST_EXCEPTION_DISABLE is also defined, users can still examine the exception object for any data added at the point of the throw, or use boost:: + 1 + + 0 + + -61 + + + 2 + (of course under BOOST_NO_EXCEPTIONS, the user-defined boost::throw_exception is not allowed to return to the caller.) + + + + + 0 + + -69 + + + + 11 + 2 + (:auto !!:) All exception types that derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :) can be used as type-safe containers of arbitrary data objects, while complying with the no-throw requirements (15.5.1) of the ANSI C++ standard for exception types. When exceptions derive from boost::(:link + 1 + + 0 + + -16 + + + 2 + :), arbitrary data can be added to exception objects: *At the point of the throw; *At a later time as exceptions bubble up the call stack. (:include + 1 + + 0 + + -62 + + + 2 + :) (:include + 1 + + 0 + + -29 + + + 2 + :) (:include + 1 + + 0 + + -10 + + + 2 + :) + + + + + 0 + + -70 + + + + 1 + 2 + (:auto !!:) !!!Synopsis (:include synopsis:) + + 0 @@ -10900,32 +10823,32 @@ - 37 + 19 2 - (:auto !!!:) (:include synopsis:) !!!!Returns: A string value that contains varying amount of implementation-specific diagnostic information about the passed object: *If E can be statically converted to boost::(:link + (:auto !!:) Boost Exception provides a namespace-scope function (:link 1 0 - -30 + -61 2 - :), the returned value contains the string representations of all (:link + :) which takes a boost::(:link 1 0 - -5 + -16 2 - :) objects stored in the boost::(:link + :). The returned string contains: *the string representation of all data objects added to the boost::(:link 1 0 - -30 + -16 2 @@ -10934,128 +10857,20 @@ 0 - -50 + -43 2 - mod="/":), along with other diagnostic information relevant to the exception. If e can be dynamically converted to std::exception, the returned value also contains the what() string. *Otherwise, if E can be statically converted std::exception: **if e can be dynamically converted to boost::exception, the returned value is the same as if E could be statically converted to boost::(:link + mod="/":); *the output from std::exception::what; *additional platform-specific diagnostic information. The returned string is not presentable as a friendly user message, but because it is generated automatically, it is useful for debugging or logging purposes. Here is an example: [@#include <(:link 1 0 - -30 + -51 2 - :); **otherwise the returned value contains the what() string. *Otherwise, the boost::(:link - 1 - - 0 - - -74 - - - 2 - :) template is not available. The string representation of each (:link - 1 - - 0 - - -5 - - - 2 - :) object is deduced by a function call that is bound at the time the (:link - 1 - - 0 - - -5 - - - 2 - :)<Tag,T> template is instantiated. The following overload resolutions are attempted in order: #Unqualified call to to_string(x), where x is of type (:link - 1 - - 0 - - -5 - - - 2 - :)<Tag,T> (the return value is expected to be of type std::string.) #Unqualified call to to_string(x.(:link - 1 - - 0 - - -60 - - - 2 - mod="m":)()) (the return value is expected to be of type std::string.) #Unqualified call to s << x.(:link - 1 - - 0 - - -60 - - - 2 - mod="m":)(), where s is a std::ostringstream. The first successfully bound function is used at the time (:link - 1 - - 0 - - -74 - - - 2 - :) is called; if all 3 overload resolutions are unsuccessful, the system is unable to convert the (:link - 1 - - 0 - - -5 - - - 2 - :) object to string, and ''an unspecified stub string value is used without issuing a compile error.'' The - 1 - - 0 - - -17 - - - 2 - overload of - 1 - - 0 - - -74 - - - 2 - is equivalent to: [@if( p ) try { - 1 - - 0 - - -36 - - - 2 - (p); } catch(...) { return - 1 - - 0 - - -66 - - - 2 - (); } else return <unspecified-string-value>;@] !!!!Notes: *The format of the returned string is unspecified. *The returned string is ''not'' user-friendly. *The returned string may include additional platform-specific diagnostic information. (:include + :)> #include <iostream> void f(); //throws unknown types that derive from boost::(:link 1 0 @@ -11064,6 +10879,33 @@ 2 + :). void g() { try { f(); } catch( boost::(:link + 1 + + 0 + + -16 + + + 2 + :) & e ) { std::cerr << (:link + 1 + + 0 + + -61 + + + 2 + :)(e); } }@] (:include + 1 + + 0 + + -7 + + + 2 :) @@ -11075,27 +10917,333 @@ - 5 + 73 2 - (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard + !!Synopsis List of documented definitions, declarations and includes by header file: `#include <(:link 1 0 - -5 + -64 2 - instance for transporting a relevant text file line number, for example in parse error exceptions deriving from boost:: + :)> [@(:include 1 0 - -30 + -64 2 - . + synopsis:)@] `#include <(:link + 1 + + 0 + + -60 + + + 2 + :)> [@(:include + 1 + + 0 + + -60 + + + 2 + synopsis:)@] `#include <(:link + 1 + + 0 + + -71 + + + 2 + :)> [@(:include + 1 + + 0 + + -71 + + + 2 + synopsis:)@] `#include <(:link + 1 + + 0 + + -73 + + + 2 + :)> [@(:include + 1 + + 0 + + -73 + + + 2 + synopsis:)@] `#include <(:link + 1 + + 0 + + -52 + + + 2 + :)> [@(:include + 1 + + 0 + + -52 + + + 2 + synopsis:)@] `#include <(:link + 1 + + 0 + + -19 + + + 2 + :)> [@(:include + 1 + + 0 + + -19 + + + 2 + synopsis:)@] `#include <(:link + 1 + + 0 + + -35 + + + 2 + :)> [@(:include + 1 + + 0 + + -35 + + + 2 + synopsis:)@] `#include <(:link + 1 + + 0 + + -9 + + + 2 + :)> [@(:include + 1 + + 0 + + -9 + + + 2 + synopsis:)@] `#include <(:link + 1 + + 0 + + -37 + + + 2 + :)> [@(:include + 1 + + 0 + + -37 + + + 2 + synopsis:)@] `#include <(:link + 1 + + 0 + + -54 + + + 2 + :)> [@(:include + 1 + + 0 + + -54 + + + 2 + synopsis:)@] `#include < + 1 + + 0 + + -39 + + + 2 + > (:include + 1 + + 0 + + -39 + + + 2 + synopsis:) `#include < + 1 + + 0 + + -12 + + + 2 + > (:include + 1 + + 0 + + -12 + + + 2 + synopsis:) `#include < + 1 + + 0 + + -63 + + + 2 + > (:include + 1 + + 0 + + -63 + + + 2 + synopsis:) `#include < + 1 + + 0 + + -23 + + + 2 + > (:include + 1 + + 0 + + -23 + + + 2 + synopsis:) `#include < + 1 + + 0 + + -70 + + + 2 + > (:include + 1 + + 0 + + -70 + + + 2 + synopsis:) `#include < + 1 + + 0 + + -58 + + + 2 + > (:include + 1 + + 0 + + -58 + + + 2 + synopsis:) `#include < + 1 + + 0 + + -72 + + + 2 + > (:include + 1 + + 0 + + -72 + + + 2 + synopsis:) `#include < + 1 + + 0 + + -51 + + + 2 + > (:include + 1 + + 0 + + -51 + + + 2 + synopsis:) @@ -11106,27 +11254,184 @@ - 5 + 1 2 - (:auto !!!:) (:include synopsis:) This type is designed to be used as a standard + (:auto !!:) (:pagelist tags="hpp" except_tags="noindex":) + + + + + 0 + + -77 + + + + 37 + 2 + [@#include < 1 0 - -5 + -39 2 - instance for transporting the string passed as a second argument to fopen in exceptions indicating fopen failures and deriving from boost:: + > #include < 1 0 - -30 + -12 2 - . + > #include < + 1 + + 0 + + -63 + + + 2 + > #include < + 1 + + 0 + + -23 + + + 2 + > #include < + 1 + + 0 + + -70 + + + 2 + > #include < + 1 + + 0 + + -58 + + + 2 + > #include < + 1 + + 0 + + -71 + + + 2 + > #include < + 1 + + 0 + + -54 + + + 2 + > #include <boost/shared_ptr.hpp> #include <boost/weak_ptr.hpp> #include <stdio.h> #include <errno.h> #include <exception> struct error : virtual std::exception, virtual boost:: + 1 + + 0 + + -16 + + + 2 + { }; struct file_error : virtual error { }; struct file_open_error: virtual file_error { }; struct file_read_error: virtual file_error { }; boost::shared_ptr<FILE> open_file( char const * file, char const * mode ) { if( FILE * f=fopen(file,mode) ) return boost::shared_ptr<FILE>(f,fclose); else + 1 + + 0 + + -49 + + + 2 + ( file_open_error() << boost:: + 1 + + 0 + + -26 + + + 2 + ("fopen") << boost:: + 1 + + 0 + + -32 + + + 2 + (errno) << boost:: + 1 + + 0 + + -55 + + + 2 + (file) << boost:: + 1 + + 0 + + -66 + + + 2 + (mode) ); } size_t read_file( boost::shared_ptr<FILE> const & f, void * buf, size_t size ) { size_t nr=fread(buf,1,size,f.get()); if( ferror(f.get()) ) + 1 + + 0 + + -49 + + + 2 + ( file_read_error() << boost:: + 1 + + 0 + + -26 + + + 2 + ("fread") << boost:: + 1 + + 0 + + -32 + + + 2 + (errno) << boost:: + 1 + + 0 + + -36 + + + 2 + (f) ); return nr; }@] @@ -11136,13 +11441,13 @@ throws - 81 + 82 reno_layer - 72 + 73 0 @@ -11294,7 +11599,9 @@ - 0 + 1 + 2 + !!!!Throws: Any exception emitted by v's copy constructor. @@ -11415,9 +11722,7 @@ - 1 - 2 - !!!!Throws: Any exception emitted by v's copy constructor. + 0 @@ -11549,7 +11854,9 @@ - 0 + 1 + 2 + !!!!Throws: std::bad_alloc, or any exception emitted by T1..TN copy constructor. @@ -11571,7 +11878,9 @@ - 0 + 1 + 2 + !!!!Throws: std::bad_alloc, or any exception emitted by the T copy constructor. @@ -11596,28 +11905,6 @@ 0 - - - 0 - - -46 - - - - 0 - - - - - 0 - - -47 - - - - 0 - - 0 @@ -11648,9 +11935,18 @@ - 1 - 2 - !!!!Throws: std::bad_alloc, or any exception emitted by the T copy constructor. + 0 + + + + + 0 + + -46 + + + + 0 @@ -11686,6 +11982,17 @@ 0 + + + 0 + + -47 + + + + 0 + + 0 @@ -11848,9 +12155,7 @@ - 1 - 2 - !!!!Throws: std::bad_alloc, or any exception emitted by T1..TN copy constructor. + 0 @@ -11941,6 +12246,17 @@ 0 + + + 0 + + -77 + + + + 0 + + @@ -11948,13 +12264,13 @@ synopsis - 82 + 83 reno_layer - 72 + 73 0 @@ -11962,28 +12278,6 @@ -5 - - 3 - 2 - `#include <(:link - 1 - - 0 - - -8 - - - 2 - :)> [@namespace boost { (:include def pre_indent="4":) }@] - - - - - 0 - - -6 - - 0 @@ -11992,22 +12286,33 @@ 0 - -7 + -6 3 2 - [@#include < + `#include < 1 0 - -73 + -52 2 - > #include <string> namespace boost { (:include api pre_indent="4":) }@] + > [@namespace boost { (:include decl pre_indent="4":) }@] + + + + + 0 + + -7 + + + + 0 @@ -12020,16 +12325,16 @@ 3 2 - [@#include <(:link + `#include < 1 0 - -72 + -9 2 - :)> namespace boost { (:include api pre_indent="4":) }@] + > [@namespace boost { (:include decl pre_indent="4":) }@] @@ -12042,16 +12347,16 @@ 3 2 - [@#include < + [@#include <(:link 1 0 - -73 + -64 2 - > #include <string> namespace boost { (:include api pre_indent="4":) }@] + :)> namespace boost { (:include api pre_indent="4":) }@] @@ -12073,18 +12378,7 @@ - 3 - 2 - [@#include < - 1 - - 0 - - -8 - - - 2 - > #include <boost/tuple/tuple.hpp> namespace boost { (:include api pre_indent="4":) }@] + 0 @@ -12095,7 +12389,18 @@ - 0 + 3 + 2 + [@#include < + 1 + + 0 + + -60 + + + 2 + > namespace boost { (:include api pre_indent="4":) }@] @@ -12106,7 +12411,18 @@ - 0 + 3 + 2 + `#include <(:link + 1 + + 0 + + -9 + + + 2 + :)> [@namespace boost { (:include decl pre_indent="4":) }@] @@ -12117,18 +12433,7 @@ - 3 - 2 - [@#include < - 1 - - 0 - - -73 - - - 2 - > namespace boost { (:include api pre_indent="4":) }@] + 0 @@ -12150,7 +12455,18 @@ - 0 + 3 + 2 + `#include <(:link + 1 + + 0 + + -64 + + + 2 + :)> [@namespace boost { (:include def pre_indent="4":) }@] @@ -12168,7 +12484,7 @@ 0 - -27 + -9 2 @@ -12183,7 +12499,18 @@ - 0 + 3 + 2 + `#include <(:link + 1 + + 0 + + -71 + + + 2 + :)> [@(:include decl:)@] @@ -12194,9 +12521,18 @@ - 1 + 3 2 - (:include api:) + [@#include <string> namespace boost { (:include + 1 + + 0 + + -16 + + + 2 + decl pre_indent="4":) (:include api pre_indent="4":) }@] @@ -12207,18 +12543,7 @@ - 3 - 2 - `#include < - 1 - - 0 - - -27 - - - 2 - > [@namespace boost { (:include decl pre_indent="4":) }@] + 0 @@ -12242,16 +12567,16 @@ 3 2 - `#include <(:link + `#include < 1 0 - -27 + -35 2 - :)> [@namespace boost { (:include decl pre_indent="4":) }@] + > [@namespace boost { (:include decl pre_indent="4":) }@] @@ -12262,9 +12587,18 @@ - 1 + 3 2 - [@namespace boost { (:include decl pre_indent="4":) }@] + [@#include < + 1 + + 0 + + -60 + + + 2 + > namespace boost { template <class> class weak_ptr; (:include api pre_indent="4":) }@] @@ -12275,18 +12609,7 @@ - 3 - 2 - [@#include <string> namespace boost { (:include - 1 - - 0 - - -30 - - - 2 - decl pre_indent="4":) (:include api pre_indent="4":) }@] + 0 @@ -12297,27 +12620,7 @@ - 5 - 2 - `#include < - 1 - - 0 - - -7 - - - 2 - > (:include - 1 - - 0 - - -7 - - - 2 - synopsis:) + 0 @@ -12328,7 +12631,27 @@ - 0 + 5 + 2 + `#include < + 1 + + 0 + + -39 + + + 2 + > (:include + 1 + + 0 + + -39 + + + 2 + synopsis:) @@ -12339,18 +12662,9 @@ - 3 + 1 2 - [@#include <(:link - 1 - - 0 - - -72 - - - 2 - :)> namespace boost { (:include api pre_indent="4":) }@] + [@#include <boost/shared_ptr.hpp> namespace boost { (:include api pre_indent="4":) }@] @@ -12368,11 +12682,11 @@ 0 - -19 + -37 2 - > (:include decl:) + > [@namespace boost { (:include decl pre_indent="4":) }@] @@ -12383,18 +12697,7 @@ - 3 - 2 - `#include <(:link - 1 - - 0 - - -8 - - - 2 - :)> [@(:include decl:)@] + 0 @@ -12412,11 +12715,11 @@ 0 - -72 + -71 2 - :)> [@namespace boost { (:include def pre_indent="4":) }@] + :)> [@(:include decl:)@] @@ -12427,7 +12730,18 @@ - 0 + 3 + 2 + `#include <(:link + 1 + + 0 + + -9 + + + 2 + :)> [@namespace boost { (:include decl pre_indent="4":) }@] @@ -12445,7 +12759,7 @@ 0 - -71 + -63 2 @@ -12454,7 +12768,7 @@ 0 - -71 + -63 2 @@ -12469,7 +12783,18 @@ - 0 + 3 + 2 + `#include <(:link + 1 + + 0 + + -9 + + + 2 + :)> [@namespace boost { (:include decl pre_indent="4":) }@] @@ -12491,18 +12816,9 @@ - 3 + 1 2 - `#include <(:link - 1 - - 0 - - -19 - - - 2 - :)> [@namespace boost { (:include decl:) }@] + [@namespace boost { (:include api pre_indent="4":) }@] @@ -12513,18 +12829,27 @@ - 3 + 5 2 - `#include <(:link + `#include < 1 0 - -27 + -23 2 - :)> [@namespace boost { (:include decl pre_indent="4":) }@] + > (:include + 1 + + 0 + + -23 + + + 2 + synopsis:) @@ -12534,74 +12859,6 @@ -37 - - 3 - 2 - `#include <(:link - 1 - - 0 - - -27 - - - 2 - :)> [@namespace boost { (:include decl pre_indent="4":) }@] - - - - - 0 - - -38 - - - - 3 - 2 - `#include < - 1 - - 0 - - -42 - - - 2 - > [@namespace boost { (:include decl pre_indent="4":) }@] - - - - - 0 - - -39 - - - - 0 - - - - - 0 - - -40 - - - - 1 - 2 - [@(:include api:)@] - - - - - 0 - - -41 - - 3 2 @@ -12610,29 +12867,7 @@ 0 - -73 - - - 2 - > #include <string> namespace boost { (:include api pre_indent="4":) }@] - - - - - 0 - - -42 - - - - 3 - 2 - [@#include < - 1 - - 0 - - -72 + -64 2 @@ -12643,13 +12878,121 @@ 0 - -43 + -38 0 + + + 0 + + -39 + + + + 3 + 2 + [@#include < + 1 + + 0 + + -60 + + + 2 + > namespace boost { (:include api pre_indent="4":) }@] + + + + + 0 + + -40 + + + + 3 + 2 + `#include <(:link + 1 + + 0 + + -71 + + + 2 + :)> [@(:include decl:)@] + + + + + 0 + + -41 + + + + 5 + 2 + `#include <(:link + 1 + + 0 + + -73 + + + 2 + :)> [@namespace boost { (:include + 1 + + 0 + + -41 + + + 2 + decl pre_indent="4":) }@] + + + + + 0 + + -42 + + + + 0 + + + + + 0 + + -43 + + + + 3 + 2 + `#include <(:link + 1 + + 0 + + -71 + + + 2 + :)>\\ [@namespace boost { (:include decl pre_indent="4":) }@] + + 0 @@ -12668,63 +13011,10 @@ -45 - - 3 - 2 - `#include < - 1 - - 0 - - -57 - - - 2 - > [@namespace boost { (:include decl pre_indent="4":) }@] - - - - - 0 - - -46 - - 0 - - - 0 - - -47 - - - - 5 - 2 - `#include < - 1 - - 0 - - -58 - - - 2 - > (:include - 1 - - 0 - - -58 - - - 2 - synopsis:) - - 0 @@ -12733,7 +13023,27 @@ - 0 + 5 + 2 + `#include < + 1 + + 0 + + -72 + + + 2 + > (:include + 1 + + 0 + + -72 + + + 2 + synopsis:) @@ -12751,11 +13061,11 @@ 0 - -56 + -54 2 - > [@namespace boost { (:include decl pre_indent="4":) }@] + > (:include decl:) @@ -12773,7 +13083,7 @@ 0 - -8 + -19 2 @@ -12784,13 +13094,26 @@ 0 - -51 + -46 0 + + + 0 + + -51 + + + + 1 + 2 + [@(:include api:)@] + + 0 @@ -12799,27 +13122,18 @@ - 5 + 3 2 - `#include < + [@#include < 1 0 - -9 + -64 2 - > (:include - 1 - - 0 - - -9 - - - 2 - synopsis:) + > namespace boost { (:include api pre_indent="4":) }@] @@ -12832,29 +13146,42 @@ 3 2 - [@#include < + `#include <(:link 1 0 - -73 + -9 2 - > namespace boost { template <class> class weak_ptr; (:include api pre_indent="4":) }@] + :)> [@namespace boost { (:include decl pre_indent="4":) }@] 0 - -54 + -47 0 + + + 0 + + -54 + + + + 1 + 2 + (:include api:) + + 0 @@ -12863,18 +13190,27 @@ - 3 + 5 2 - `#include <(:link + `#include < 1 0 - -8 + -70 2 - :)> [@(:include decl:)@] + > (:include + 1 + + 0 + + -70 + + + 2 + synopsis:) @@ -12885,18 +13221,9 @@ - 3 + 1 2 - [@#include < - 1 - - 0 - - -72 - - - 2 - > namespace boost { (:include api pre_indent="4":) }@] + [@namespace boost { (:include decl pre_indent="4":) }@] @@ -12907,9 +13234,18 @@ - 1 + 3 2 - [@namespace boost { (:include api pre_indent="4":) }@] + `#include <(:link + 1 + + 0 + + -54 + + + 2 + :)> [@namespace boost { (:include decl:) }@] @@ -12927,11 +13263,11 @@ 0 - -73 + -60 2 - > namespace boost { (:include api pre_indent="4":) }@] + > #include <string> namespace boost { (:include api pre_indent="4":) }@] @@ -12942,27 +13278,7 @@ - 5 - 2 - `#include < - 1 - - 0 - - -53 - - - 2 - > (:include - 1 - - 0 - - -53 - - - 2 - synopsis:) + 0 @@ -12973,18 +13289,9 @@ - 3 + 1 2 - `#include <(:link - 1 - - 0 - - -8 - - - 2 - :)> [@(:include decl:)@] + [@namespace boost { (:include api pre_indent="4":) }@] @@ -12994,52 +13301,6 @@ -61 - - 0 - - - - - 0 - - -62 - - - - 1 - 2 - [@#include <boost/shared_ptr.hpp> namespace boost { (:include api pre_indent="4":) }@] - - - - - 0 - - -63 - - - - 0 - - - - - 0 - - -64 - - - - 0 - - - - - 0 - - -65 - - 3 2 @@ -13048,29 +13309,7 @@ 0 - -27 - - - 2 - :)> [@namespace boost { (:include decl pre_indent="4":) }@] - - - - - 0 - - -66 - - - - 3 - 2 - `#include <(:link - 1 - - 0 - - -24 + -19 2 @@ -13081,7 +13320,7 @@ 0 - -67 + -62 @@ -13092,31 +13331,130 @@ 0 - -68 + -63 + + + + 3 + 2 + [@#include < + 1 + + 0 + + -60 + + + 2 + > #include <errno.h> namespace boost { (:include api pre_indent="4":) }@] + + + + + 0 + + -64 + + + + 1 + 2 + [@namespace boost { (:include api pre_indent="4":) }@] + + + + + 0 + + -65 5 2 + `#include < + 1 + + 0 + + -12 + + + 2 + > (:include + 1 + + 0 + + -12 + + + 2 + synopsis:) + + + + + 0 + + -66 + + + + 5 + 2 + `#include < + 1 + + 0 + + -58 + + + 2 + > (:include + 1 + + 0 + + -58 + + + 2 + synopsis:) + + + + + 0 + + -67 + + + + 3 + 2 `#include <(:link 1 0 - -11 + -71 2 - :)> [@namespace boost { (:include - 1 - - 0 - - -68 - - - 2 - decl pre_indent="4":) }@] + :)> [@namespace boost { (:include def pre_indent="4":) }@] + + + + + 0 + + -68 + + + + 0 @@ -13138,7 +13476,18 @@ - 0 + 3 + 2 + [@#include < + 1 + + 0 + + -60 + + + 2 + > #include <string> namespace boost { (:include api pre_indent="4":) }@] @@ -13151,16 +13500,16 @@ 3 2 - [@#include < + [@#include <(:link 1 0 - -73 + -64 2 - > #include <errno.h> namespace boost { (:include api pre_indent="4":) }@] + :)> namespace boost { (:include api pre_indent="4":) }@] @@ -13171,9 +13520,18 @@ - 1 + 3 2 - [@namespace boost { (:include api pre_indent="4":) }@] + [@#include < + 1 + + 0 + + -60 + + + 2 + > #include <string> namespace boost { (:include api pre_indent="4":) }@] @@ -13184,9 +13542,18 @@ - 1 + 3 2 - [@namespace boost { (:include api pre_indent="4":) }@] + [@#include < + 1 + + 0 + + -71 + + + 2 + > #include <boost/tuple/tuple.hpp> namespace boost { (:include api pre_indent="4":) }@] @@ -13197,18 +13564,7 @@ - 3 - 2 - `#include <(:link - 1 - - 0 - - -24 - - - 2 - :)>\\ [@namespace boost { (:include decl pre_indent="4":) }@] + 0 @@ -13219,27 +13575,7 @@ - 5 - 2 - `#include < - 1 - - 0 - - -14 - - - 2 - > (:include - 1 - - 0 - - -14 - - - 2 - synopsis:) + 0 @@ -13250,27 +13586,18 @@ - 5 - 2 - `#include < - 1 - - 0 - - -41 - - - 2 - > (:include - 1 - - 0 - - -41 - - - 2 - synopsis:) + 0 + + + + + 0 + + -77 + + + + 0 @@ -13283,14 +13610,14 @@ - 83 + 84 reno_context_map - 72 + 73 -5 @@ -13414,12 +13741,6 @@ -45 - - -46 - - - -47 - -48 @@ -13429,6 +13750,9 @@ -50 + + -46 + -51 @@ -13438,6 +13762,9 @@ -53 + + -47 + -54 @@ -13507,11 +13834,14 @@ -76 + + -77 + - 72 + 73 @@ -13526,7 +13856,7 @@ - -54 + -44 @@ -13543,92 +13873,7 @@ - -63 - - - - - - - 0 - - - - - - 1 - - - - -10 - - - - - - - 0 - - - - - - 1 - - - - -21 - - - - - - - 0 - - - - - - 1 - - - - -42 - - - - - - - 0 - - - - - - 1 - - - - -56 - - - - - - - 0 - - - - - - 1 - - - - -48 + -24 @@ -13662,7 +13907,7 @@ - -26 + -14 @@ -13679,7 +13924,58 @@ - -18 + -52 + + + + + + + 0 + + + + + + 1 + + + + -37 + + + + + + + 0 + + + + + + 1 + + + + -45 + + + + + + + 0 + + + + + + 1 + + + + -5 @@ -13713,7 +14009,41 @@ - -31 + -15 + + + + + + + 0 + + + + + + 1 + + + + -21 + + + + + + + 0 + + + + + + 1 + + + + -76 @@ -13747,7 +14077,7 @@ - -44 + -59 @@ -13764,7 +14094,7 @@ - -13 + -75 @@ -13788,7 +14118,7 @@ - -24 + -19 @@ -13812,7 +14142,7 @@ - -27 + -9 @@ -13836,7 +14166,7 @@ - -7 + -70 @@ -13864,7 +14194,7 @@ - -76 + -66 @@ -13888,7 +14218,7 @@ - -58 + -39 @@ -13916,7 +14246,7 @@ - -65 + -31 @@ -13944,7 +14274,7 @@ - -22 + -17 @@ -13972,7 +14302,7 @@ - -17 + -53 @@ -14000,7 +14330,7 @@ - -20 + -8 @@ -14028,7 +14358,7 @@ - -36 + -33 @@ -14056,7 +14386,7 @@ - -37 + -13 @@ -14080,7 +14410,7 @@ - -61 + -38 @@ -14104,7 +14434,31 @@ - -16 + -7 + + + + + + + 1 + F812D8AE60189369CED7A3FD72733A65B57D56637E6721867F52A82EB319731A + 3974553696 + 1432 + 352 + + + + + + 0 + ../../example/errinfos.cpp + 0 + 0 + + + + -77 @@ -14132,7 +14486,7 @@ - -52 + -48 @@ -14160,7 +14514,7 @@ - -29 + -18 @@ -14188,7 +14542,7 @@ - -50 + -43 @@ -14212,7 +14566,7 @@ - -71 + -63 @@ -14236,7 +14590,7 @@ - -67 + -25 @@ -14264,7 +14618,7 @@ - -45 + -22 @@ -14292,7 +14646,7 @@ - -23 + -56 @@ -14320,7 +14674,7 @@ - -59 + -36 @@ -14344,7 +14698,7 @@ - -33 + -10 @@ -14368,7 +14722,7 @@ - -12 + -74 @@ -14396,7 +14750,7 @@ - -74 + -61 @@ -14420,7 +14774,7 @@ - -9 + -72 @@ -14472,7 +14826,7 @@ - -40 + -51 @@ -14500,7 +14854,7 @@ - -47 + -26 @@ -14524,7 +14878,7 @@ - -14 + -12 @@ -14552,7 +14906,7 @@ - -75 + -65 @@ -14580,7 +14934,7 @@ - -66 + -50 @@ -14604,7 +14958,7 @@ - -53 + -23 @@ -14628,7 +14982,7 @@ - -51 + -29 @@ -14652,7 +15006,7 @@ - -57 + -35 @@ -14676,7 +15030,7 @@ - -41 + -58 @@ -14700,7 +15054,7 @@ - -70 + -62 @@ -14728,7 +15082,7 @@ - -5 + -67 @@ -14760,7 +15114,7 @@ - -55 + -30 @@ -14792,7 +15146,7 @@ - -60 + -40 @@ -14820,7 +15174,7 @@ - -35 + -57 @@ -14852,7 +15206,7 @@ - -6 + -68 @@ -14876,7 +15230,7 @@ - -62 + -27 @@ -14900,7 +15254,7 @@ - -8 + -71 @@ -14924,7 +15278,7 @@ - -11 + -73 @@ -14948,7 +15302,7 @@ - -19 + -54 @@ -14972,7 +15326,7 @@ - -28 + -49 @@ -14996,7 +15350,7 @@ - -72 + -64 @@ -15024,7 +15378,7 @@ - -43 + -11 @@ -15052,7 +15406,7 @@ - -49 + -28 @@ -15080,7 +15434,7 @@ - -38 + -6 @@ -15108,7 +15462,7 @@ - -30 + -16 @@ -15140,7 +15494,7 @@ - -64 + -42 @@ -15168,7 +15522,7 @@ - -25 + -55 @@ -15192,7 +15546,7 @@ - -39 + -47 @@ -15220,7 +15574,7 @@ - -73 + -60 @@ -15248,7 +15602,7 @@ - -68 + -41 @@ -15272,7 +15626,7 @@ - -15 + -20 @@ -15282,7 +15636,7 @@ - 84 + 85 tag_index @@ -15303,7 +15657,16 @@ -5 - type + tutorial + + + + 0 + + -6 + + + error_info free function @@ -15312,6 +15675,15 @@ -8 + type + + + + 0 + + -9 + + @@ -15321,7 +15693,7 @@ -10 - tutorial + noalso noindex tutorial @@ -15330,25 +15702,34 @@ -11 + function + + + + 0 + + -13 + + + exception_ptr free function + + + + 0 + + -14 + + 0 - -12 + -16 - diagnostic_information tutorial - - - - 0 - - -15 - - - noindex + type @@ -15357,7 +15738,16 @@ -17 - type + exception_ptr free function + + + + 0 + + -18 + + + function member @@ -15375,16 +15765,7 @@ -20 - type - - - - 0 - - -21 - - - + noindex @@ -15393,16 +15774,7 @@ -22 - exception_ptr free function - - - - 0 - - -23 - - - error_info free function + function @@ -15411,7 +15783,7 @@ -24 - + tutorial @@ -15420,6 +15792,15 @@ -25 + noindex tutorial + + + + 0 + + -26 + + error_info_instance noalso type @@ -15429,7 +15810,7 @@ -27 - + error_info @@ -15438,7 +15819,7 @@ -28 - macro + exception_ptr free function @@ -15447,7 +15828,7 @@ -29 - function member + noalso noindex tutorial @@ -15458,6 +15839,15 @@ type + + + 0 + + -31 + + + exception_ptr type + 0 @@ -15474,7 +15864,7 @@ -33 - noalso noindex tutorial + exception_ptr free function @@ -15483,7 +15873,7 @@ -35 - free function + @@ -15492,7 +15882,7 @@ -36 - exception_ptr free function + error_info_instance noalso type @@ -15501,7 +15891,7 @@ -37 - exception_ptr free function + exception_ptr @@ -15510,16 +15900,25 @@ -38 - error_info free function + noindex tutorial 0 - -39 + -40 - tutorial + function member + + + + 0 + + -41 + + + error_info free function @@ -15528,7 +15927,7 @@ -42 - error_info + function @@ -15537,22 +15936,22 @@ -43 - function + error_info free function 0 - -45 + -44 - function + noindex 0 - -47 + -48 error_info_instance noalso type @@ -15564,7 +15963,7 @@ -49 - exception_ptr free function + macro @@ -15573,16 +15972,7 @@ -50 - error_info free function - - - - 0 - - -51 - - - noalso noindex tutorial + function @@ -15591,22 +15981,13 @@ -52 - error_info_instance noalso type + error_info 0 - -54 - - - noindex - - - - 0 - - -55 + -53 type @@ -15615,65 +15996,74 @@ 0 - -56 - - - exception_ptr - - - - 0 - - -57 - - - - - - - 0 - - -59 - - - error_info_instance noalso type - - - - 0 - - -60 - - - function member - - - - 0 - - -61 - - - noindex tutorial - - - - 0 - - -62 - - - error_info - - - - 0 - - -63 + -47 tutorial + + + 0 + + -54 + + + + + + + 0 + + -55 + + + error_info_instance noalso type + + + + 0 + + -56 + + + error_info free function + + + + 0 + + -57 + + + free function + + + + 0 + + -60 + + + + + + + 0 + + -61 + + + diagnostic_information free function + + + + 0 + + -62 + + + noalso noindex tutorial + 0 @@ -15681,7 +16071,7 @@ -64 - function + @@ -15690,7 +16080,7 @@ -65 - exception_ptr type + error_info_instance noalso type @@ -15699,7 +16089,7 @@ -66 - function + error_info_instance noalso type @@ -15708,16 +16098,7 @@ -67 - noindex tutorial - - - - 0 - - -68 - - - error_info free function + type @@ -15732,16 +16113,7 @@ 0 - -70 - - - noalso noindex tutorial - - - - 0 - - -72 + -71 @@ -15762,25 +16134,7 @@ -74 - diagnostic_information free function - - - - 0 - - -75 - - - error_info_instance noalso type - - - - 0 - - -76 - - - error_info_instance noalso type + diagnostic_information tutorial diff --git a/example/Jamfile b/example/Jamfile index 244fefe..44e18bf 100644 --- a/example/Jamfile +++ b/example/Jamfile @@ -13,3 +13,4 @@ obj cloning_2 : cloning_2.cpp : multi ; obj info_tuple : info_tuple.cpp ; obj enable_error_info : enable_error_info.cpp ; obj logging : logging.cpp ; +obj errinfos : errinfos.cpp ; diff --git a/example/errinfos.cpp b/example/errinfos.cpp new file mode 100644 index 0000000..ed9a434 --- /dev/null +++ b/example/errinfos.cpp @@ -0,0 +1,53 @@ +//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. + +//Distributed under the Boost Software License, Version 1.0. (See accompanying +//file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + +//This example demonstrates the intended use of various commonly used +//error_info typedefs provided by Boost Exception. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct error : virtual std::exception, virtual boost::exception { }; +struct file_error : virtual error { }; +struct file_open_error: virtual file_error { }; +struct file_read_error: virtual file_error { }; + +boost::shared_ptr +open_file( char const * file, char const * mode ) + { + if( FILE * f=fopen(file,mode) ) + return boost::shared_ptr(f,fclose); + else + BOOST_THROW_EXCEPTION( + file_open_error() << + boost::errinfo_api_function("fopen") << + boost::errinfo_errno(errno) << + boost::errinfo_file_name(file) << + boost::errinfo_file_open_mode(mode) ); + } + +size_t +read_file( boost::shared_ptr const & f, void * buf, size_t size ) + { + size_t nr=fread(buf,1,size,f.get()); + if( ferror(f.get()) ) + BOOST_THROW_EXCEPTION( + file_read_error() << + boost::errinfo_api_function("fread") << + boost::errinfo_errno(errno) << + boost::errinfo_file_handle(f) ); + return nr; + }