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Merge change from Trunk to release.

Browse Source 
[SVN r71481]
This commit is contained in:
John Maddock
2011-04-25 12:26:48 +00:00
parent 023bec7ba0
commit e1a315e00e
170 changed files with 1098 additions and 446 deletions
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5
doc/Jamfile.v2
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@ -78,8 +78,9 @@ boostbook standalone
<format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/libs/type_traits/doc/html
;
#install html : ../../../doc/html/boostbook.css ;
#install ../ : ../../../boost.png ;
install pdf-install : standalone : <install-type>PDF <location>. <name>type_traits.pdf ;

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@ -14,7 +14,7 @@
[def __declval [@../../../utility/doc/html/declval.html declval]]
`#include <boost/type_traits/common_type.hpp>`
__header ` #include <boost/type_traits/common_type.hpp>` or ` #include <boost/type_traits.hpp>`
namespace boost {
template <class ...T> struct __common_type;

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@ -10,7 +10,7 @@
[/===================================================================]
`#include <boost/type_traits/conditional.hpp>`
__header ` #include <boost/type_traits/conditional.hpp>` or ` #include <boost/type_traits.hpp>`
namespace boost {
template <bool B, class T, class U> struct __conditional;

8
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@ -22,11 +22,13 @@ These two traits are synonyms for each other.
__compat If the compiler does not support partial-specialization of class
templates, then this template can not be used with function types.
Without some (as yet unspecified) help from the compiler,
Without some (unspecified) help from the compiler,
`has_nothrow_constructor` will never report that a class or struct has a
non-throwing default-constructor; this is always safe, if possibly sub-optimal.
Currently (May 2005) only Visual C++ 8 has the necessary compiler __intrinsics to ensure that this
trait "just works".
Currently (May 2011) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
Intel-11.0, and Codegear have the necessary compiler __intrinsics to ensure that this
trait "just works". You may also test to see if the necessary __intrinsics are available
by checking to see if the macro `BOOST_HAS_NOTHROW_CONSTRUCTOR` is defined.
__header ` #include <boost/type_traits/has_nothrow_constructor.hpp>` or ` #include <boost/type_traits.hpp>`

6
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@ -25,8 +25,10 @@ templates, then this template can not be used with function types.
Without some (as yet unspecified) help from the compiler,
`has_nothrow_copy` will never report that a class or struct has a
non-throwing copy-constructor; this is always safe, if possibly sub-optimal.
Currently (May 2005) only Visual C++ 8 has the necessary compiler __intrinsics to ensure that this
trait "just works".
Currently (May 2011) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
Intel-11.0, and Codegear have the necessary compiler __intrinsics to ensure that this
trait "just works". You may also test to see if the necessary __intrinsics are available
by checking to see if the macro `BOOST_HAS_NOTHROW_COPY` is defined.
__header ` #include <boost/type_traits/has_nothrow_copy.hpp>` or ` #include <boost/type_traits.hpp>`

9
doc/has_trivial_assign.qbk
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@ -21,9 +21,12 @@ templates, then this template can not be used with function types.
Without some (as yet unspecified) help from the compiler,
has_trivial_assign will never report that a user-defined class or struct has a
trivial constructor; this is always safe, if possibly sub-optimal. Currently
(May 2005) only MWCW 9 and Visual C++ 8 have the necessary compiler __intrinsics to detect
user-defined classes with trivial constructors.
trivial constructor; this is always safe, if possibly sub-optimal.
Currently (May 2011) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
Intel-11.0, and Codegear have the necessary compiler __intrinsics to ensure that this
trait "just works". You may also test to see if the necessary __intrinsics are available
by checking to see if the macro `BOOST_HAS_TRIVIAL_ASSIGN` is defined.
__std_ref 12.8p11.

9
doc/has_trivial_constructor.qbk
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@ -29,9 +29,12 @@ templates, then this template can not be used with function types.
Without some (as yet unspecified) help from the compiler,
has_trivial_constructor will never report that a user-defined class or struct has a
trivial constructor; this is always safe, if possibly sub-optimal. Currently
(May 2005) only MWCW 9 and Visual C++ 8 have the necessary compiler __intrinsics to detect
user-defined classes with trivial constructors.
trivial constructor; this is always safe, if possibly sub-optimal.
Currently (May 2011) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
Intel-11.0, and Codegear have the necessary compiler __intrinsics to ensure that this
trait "just works". You may also test to see if the necessary __intrinsics are available
by checking to see if the macro `BOOST_HAS_TRIVIAL_CONSTRUCTOR` is defined.
__std_ref 12.1p6.

9
doc/has_trivial_copy.qbk
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@ -27,9 +27,12 @@ templates, then this template can not be used with function types.
Without some (as yet unspecified) help from the compiler,
has_trivial_copy will never report that a user-defined class or struct has a
trivial constructor; this is always safe, if possibly sub-optimal. Currently
(May 2005) only MWCW 9 and Visual C++ 8 have the necessary compiler __intrinsics to detect
user-defined classes with trivial constructors.
trivial constructor; this is always safe, if possibly sub-optimal.
Currently (May 2011) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
Intel-11.0, and Codegear have the necessary compiler __intrinsics to ensure that this
trait "just works". You may also test to see if the necessary __intrinsics are available
by checking to see if the macro `BOOST_HAS_TRIVIAL_COPY` is defined.
__std_ref 12.8p6.

9
doc/has_trivial_destructor.qbk
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@ -23,9 +23,12 @@ templates, then this template can not be used with function types.
Without some (as yet unspecified) help from the compiler,
has_trivial_destructor will never report that a user-defined class or struct has a
trivial destructor; this is always safe, if possibly sub-optimal. Currently
(May 2005) only MWCW 9 and Visual C++ 8 have the necessary compiler __intrinsics to detect
user-defined classes with trivial constructors.
trivial destructor; this is always safe, if possibly sub-optimal.
Currently (May 2011) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
Intel-11.0, and Codegear have the necessary compiler __intrinsics to ensure that this
trait "just works". You may also test to see if the necessary __intrinsics are available
by checking to see if the macro `BOOST_HAS_TRIVIAL_DESTRUCTOR` is defined.
__std_ref 12.4p3.

8
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@ -17,8 +17,12 @@ Technical Report on C++ Library Extensions. However, there is currently no
way to portably implement this trait. The default version provided
always inherits from __false_type, and has to be explicitly specialized for
types with virtual destructors unless the compiler used has compiler __intrinsics
that enable the trait to do the right thing: currently (May 2005) only Visual C++
8 and GCC-4.3 have the necessary __intrinsics.
that enable the trait to do the right thing:
Currently (May 2011) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0,
Intel-11.0, and Codegear have the necessary compiler __intrinsics to ensure that this
trait "just works". You may also test to see if the necessary __intrinsics are available
by checking to see if the macro `BOOST_HAS_VIRTUAL_DESTRUCTOR` is defined.
__std_ref 12.4.

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@ -7,6 +7,13 @@
[section:history History]
[h4 Boost 1.47.0]
* [* Breaking change]: changed __is_convertible to C++0x behaviour when possible.
* Fixed issues [@https://svn.boost.org/trac/boost/ticket/5271 #5271],
[@https://svn.boost.org/trac/boost/ticket/4530 #4530].
[h4 Boost 1.45.0]
* Added new traits __add_rvalue_reference, __add_lvalue_reference and __common_type.

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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -57,7 +56,7 @@
method available to them.
</p>
<a name="boost_typetraits.background.type_traits"></a><h5>
<a name="id1005124"></a>
<a name="id1007922"></a>
<a class="link" href="background.html#boost_typetraits.background.type_traits">Type Traits</a>
</h5>
<p>
@ -85,7 +84,7 @@
given.
</p>
<a name="boost_typetraits.background.implementation"></a><h5>
<a name="id1005188"></a>
<a name="id1007985"></a>
<a class="link" href="background.html#boost_typetraits.background.implementation">Implementation</a>
</h5>
<p>
@ -175,7 +174,7 @@
in the default template.
</p>
<a name="boost_typetraits.background.optimized_copy"></a><h5>
<a name="id1014129"></a>
<a name="id1015349"></a>
<a class="link" href="background.html#boost_typetraits.background.optimized_copy">Optimized copy</a>
</h5>
<p>
@ -248,7 +247,7 @@
otherwise it will call the "slow but safe version".
</p>
<a name="boost_typetraits.background.was_it_worth_it_"></a><h5>
<a name="id1014495"></a>
<a name="id1015715"></a>
<a class="link" href="background.html#boost_typetraits.background.was_it_worth_it_">Was it worth it?</a>
</h5>
<p>
@ -380,7 +379,7 @@
</table></div>
</div>
<br class="table-break"><a name="boost_typetraits.background.pair_of_references"></a><h5>
<a name="id1014691"></a>
<a name="id1015912"></a>
<a class="link" href="background.html#boost_typetraits.background.pair_of_references">Pair of References</a>
</h5>
<p>
@ -598,7 +597,7 @@
easier to maintain and easier to understand.
</p>
<a name="boost_typetraits.background.conclusion"></a><h5>
<a name="id1015535"></a>
<a name="id1016755"></a>
<a class="link" href="background.html#boost_typetraits.background.conclusion">Conclusion</a>
</h5>
<p>
@ -611,7 +610,7 @@
can be optimal as well as generic.
</p>
<a name="boost_typetraits.background.acknowledgements"></a><h5>
<a name="id1015552"></a>
<a name="id1016772"></a>
<a class="link" href="background.html#boost_typetraits.background.acknowledgements">Acknowledgements</a>
</h5>
<p>
@ -619,7 +618,7 @@
comments when preparing this article.
</p>
<a name="boost_typetraits.background._anchor_id__background_references____references"></a><h5>
<a name="id1015569"></a>
<a name="id1016789"></a>
<a class="link" href="background.html#boost_typetraits.background._anchor_id__background_references____references"><a name="background.references"></a> References</a>
</h5>
<div class="orderedlist"><ol type="1">

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@ -1,4 +1,3 @@
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

1
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@ -1,4 +1,3 @@
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

1
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@ -1,4 +1,3 @@
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<html>
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@ -1,4 +1,3 @@
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<html>
<head>
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@ -104,7 +103,7 @@
<span class="keyword">struct</span> <a class="link" href="../reference/remove_volatile.html" title="remove_volatile">remove_volatile</a><span class="special">;</span>
</pre>
<a name="boost_typetraits.category.transform.broken_compiler_workarounds_"></a><h5>
<a name="id1020176"></a>
<a name="id1020853"></a>
<a class="link" href="transform.html#boost_typetraits.category.transform.broken_compiler_workarounds_">Broken
Compiler Workarounds:</a>
</h5>

1
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@ -1,4 +1,3 @@
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@ -1,4 +1,3 @@
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@ -27,8 +26,22 @@
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="boost_typetraits.history"></a><a class="link" href="history.html" title="History">History</a>
</h2></div></div></div>
<a name="boost_typetraits.history.boost_1_47_0"></a><h5>
<a name="id1078250"></a>
<a class="link" href="history.html#boost_typetraits.history.boost_1_47_0">Boost 1.47.0</a>
</h5>
<div class="itemizedlist"><ul type="disc">
<li>
<span class="bold"><strong>Breaking change</strong></span>: changed <a class="link" href="reference/is_convertible.html" title="is_convertible">is_convertible</a>
to C++0x behaviour when possible.
</li>
<li>
Fixed issues <a href="https://svn.boost.org/trac/boost/ticket/5271" target="_top">#5271</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4530" target="_top">#4530</a>.
</li>
</ul></div>
<a name="boost_typetraits.history.boost_1_45_0"></a><h5>
<a name="id1077080"></a>
<a name="id1078300"></a>
<a class="link" href="history.html#boost_typetraits.history.boost_1_45_0">Boost 1.45.0</a>
</h5>
<div class="itemizedlist"><ul type="disc">
@ -44,7 +57,7 @@
</li>
</ul></div>
<a name="boost_typetraits.history.boost_1_44_0"></a><h5>
<a name="id1077140"></a>
<a name="id1078360"></a>
<a class="link" href="history.html#boost_typetraits.history.boost_1_44_0">Boost 1.44.0</a>
</h5>
<div class="itemizedlist"><ul type="disc">
@ -60,7 +73,7 @@
</li>
</ul></div>
<a name="boost_typetraits.history.boost_1_42_0"></a><h5>
<a name="id1077195"></a>
<a name="id1078416"></a>
<a class="link" href="history.html#boost_typetraits.history.boost_1_42_0">Boost 1.42.0</a>
</h5>
<div class="itemizedlist"><ul type="disc"><li>

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@ -28,7 +27,9 @@
<a name="boost_typetraits.reference.common_type"></a><a class="link" href="common_type.html" title="common_type">common_type</a>
</h3></div></div></div>
<p>
<code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">common_type</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
<span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>
<span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">common_type</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
</p>
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="special">...</span><span class="identifier">T</span><span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="common_type.html" title="common_type">common_type</a><span class="special">;</span>
@ -74,7 +75,7 @@
template arguments is 3.
</p>
<a name="boost_typetraits.reference.common_type.configuration_macros"></a><h5>
<a name="id1034093"></a>
<a name="id1036155"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.configuration_macros">Configuration
macros</a>
</h5>
@ -104,7 +105,7 @@
Otherwise when BOOST_COMMON_TYPE_DONT_USE_TYPEOF is not defined it uses Boost.TypeOf.
</p>
<a name="boost_typetraits.reference.common_type.tutorial"></a><h5>
<a name="id1034150"></a>
<a name="id1036212"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.tutorial">Tutorial</a>
</h5>
<p>
@ -139,7 +140,7 @@
This is a very useful and broadly applicable utility.
</p>
<a name="boost_typetraits.reference.common_type.how_to_get_the_common_type_of_types_with_explicit_conversions_"></a><h5>
<a name="id1034451"></a>
<a name="id1036513"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.how_to_get_the_common_type_of_types_with_explicit_conversions_">How
to get the common type of types with explicit conversions?</a>
</h5>
@ -161,7 +162,7 @@
<span class="special">};</span>
</pre>
<a name="boost_typetraits.reference.common_type.how_important_is_the_order_of_the_common_type_lt__gt__template_arguments_"></a><h5>
<a name="id1034751"></a>
<a name="id1036813"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.how_important_is_the_order_of_the_common_type_lt__gt__template_arguments_">How
important is the order of the common_type&lt;&gt; template arguments?</a>
</h5>
@ -241,7 +242,7 @@
<span class="identifier">A</span><span class="special">&gt;</span></code>.
</p>
<a name="boost_typetraits.reference.common_type.can_the_common_type_of_two_types_be_a_third_type_"></a><h5>
<a name="id1035618"></a>
<a name="id1037680"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.can_the_common_type_of_two_types_be_a_third_type_">Can
the common_type of two types be a third type?</a>
</h5>
@ -268,7 +269,7 @@
<span class="identifier">B</span><span class="special">&gt;</span></code>.
</p>
<a name="boost_typetraits.reference.common_type.how_common_type_behaves_with_pointers_"></a><h5>
<a name="id1035897"></a>
<a name="id1037959"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.how_common_type_behaves_with_pointers_">How
common_type behaves with pointers?</a>
</h5>
@ -304,7 +305,7 @@
Of course the user can always make this specialization.
</p>
<a name="boost_typetraits.reference.common_type.can_you_explain_the_pros_cons_of_common_type_against_boost_typeof_"></a><h5>
<a name="id1036182"></a>
<a name="id1038821"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.can_you_explain_the_pros_cons_of_common_type_against_boost_typeof_">Can
you explain the pros/cons of common_type against Boost.Typeof?</a>
</h5>

5
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -28,7 +27,9 @@
<a name="boost_typetraits.reference.conditional"></a><a class="link" href="conditional.html" title="conditional">conditional</a>
</h3></div></div></div>
<p>
<code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">conditional</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
<span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>
<span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">conditional</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
</p>
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">bool</span> <span class="identifier">B</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">T</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">U</span><span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="conditional.html" title="conditional">conditional</a><span class="special">;</span>

1
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@ -1,4 +1,3 @@
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

1
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

1
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

1
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

13
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -49,11 +48,15 @@
can not be used with function types.
</p>
<p>
Without some (as yet unspecified) help from the compiler, <code class="computeroutput"><span class="identifier">has_nothrow_constructor</span></code>
Without some (unspecified) help from the compiler, <code class="computeroutput"><span class="identifier">has_nothrow_constructor</span></code>
will never report that a class or struct has a non-throwing default-constructor;
this is always safe, if possibly sub-optimal. Currently (May 2005) only Visual
C++ 8 has the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works".
this is always safe, if possibly sub-optimal. Currently (May 2011) compilers
more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear
have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_HAS_NOTHROW_CONSTRUCTOR</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>

11
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -51,9 +50,13 @@
<p>
Without some (as yet unspecified) help from the compiler, <code class="computeroutput"><span class="identifier">has_nothrow_copy</span></code>
will never report that a class or struct has a non-throwing copy-constructor;
this is always safe, if possibly sub-optimal. Currently (May 2005) only Visual
C++ 8 has the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works".
this is always safe, if possibly sub-optimal. Currently (May 2011) compilers
more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear
have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_HAS_NOTHROW_COPY</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>

1
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">

11
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -48,9 +47,13 @@
<p>
Without some (as yet unspecified) help from the compiler, has_trivial_assign
will never report that a user-defined class or struct has a trivial constructor;
this is always safe, if possibly sub-optimal. Currently (May 2005) only MWCW
9 and Visual C++ 8 have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to detect user-defined classes with trivial constructors.
this is always safe, if possibly sub-optimal. Currently (May 2011) compilers
more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear
have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_HAS_TRIVIAL_ASSIGN</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>C++ Standard Reference:</strong></span> 12.8p11.

11
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -56,9 +55,13 @@
<p>
Without some (as yet unspecified) help from the compiler, has_trivial_constructor
will never report that a user-defined class or struct has a trivial constructor;
this is always safe, if possibly sub-optimal. Currently (May 2005) only MWCW
9 and Visual C++ 8 have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to detect user-defined classes with trivial constructors.
this is always safe, if possibly sub-optimal. Currently (May 2011) compilers
more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear
have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_HAS_TRIVIAL_CONSTRUCTOR</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>C++ Standard Reference:</strong></span> 12.1p6.

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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -54,9 +53,13 @@
<p>
Without some (as yet unspecified) help from the compiler, has_trivial_copy
will never report that a user-defined class or struct has a trivial constructor;
this is always safe, if possibly sub-optimal. Currently (May 2005) only MWCW
9 and Visual C++ 8 have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to detect user-defined classes with trivial constructors.
this is always safe, if possibly sub-optimal. Currently (May 2011) compilers
more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear
have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_HAS_TRIVIAL_COPY</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>C++ Standard Reference:</strong></span> 12.8p6.

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@ -1,4 +1,3 @@
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<head>
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1
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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11
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -50,9 +49,13 @@
<p>
Without some (as yet unspecified) help from the compiler, has_trivial_destructor
will never report that a user-defined class or struct has a trivial destructor;
this is always safe, if possibly sub-optimal. Currently (May 2005) only MWCW
9 and Visual C++ 8 have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to detect user-defined classes with trivial constructors.
this is always safe, if possibly sub-optimal. Currently (May 2011) compilers
more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear
have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_HAS_TRIVIAL_DESTRUCTOR</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>C++ Standard Reference:</strong></span> 12.4p3.

10
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -42,8 +41,13 @@
trait. The default version provided always inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>,
and has to be explicitly specialized for types with virtual destructors unless
the compiler used has compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
that enable the trait to do the right thing: currently (May 2005) only Visual
C++ 8 and GCC-4.3 have the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>.
that enable the trait to do the right thing: Currently (May 2011) compilers
more recent than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear
have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_HAS_VIRTUAL_DESTRUCTOR</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>C++ Standard Reference:</strong></span> 12.4.

1
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@ -1,4 +1,3 @@
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<html>
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1
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@ -1,4 +1,3 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -32,17 +31,16 @@
</pre>
<p>
<span class="bold"><strong>Inherits:</strong></span> If Base is base class of type
Derived or if both types are the same then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
Derived or if both types are the same class type then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
</p>
<p>
This template will detect non-public base classes, and ambiguous base classes.
</p>
<p>
Note that <code class="computeroutput"><span class="identifier">is_base_of</span><span class="special">&lt;</span><span class="identifier">X</span><span class="special">,</span><span class="identifier">X</span><span class="special">&gt;</span></code> will always inherit from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>.
<span class="bold"><strong>This is the case even if <code class="computeroutput"><span class="identifier">X</span></code>
is not a class type</strong></span>. This is a change in behaviour from Boost-1.33
in order to track the Technical Report on C++ Library Extensions.
Note that <code class="computeroutput"><span class="identifier">is_base_of</span><span class="special">&lt;</span><span class="identifier">X</span><span class="special">,</span><span class="identifier">X</span><span class="special">&gt;</span></code> will inherit from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>
if X is a class type. This is a change in behaviour from Boost-1.39.0 in
order to track the emerging C++0x standard.
</p>
<p>
Types <code class="computeroutput"><span class="identifier">Base</span></code> and <code class="computeroutput"><span class="identifier">Derived</span></code> must not be incomplete types.

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@ -48,8 +47,12 @@
yet unspecified) help from the compiler, we cannot distinguish between union
and class types, as a result this type will erroneously inherit from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a> for
union types. See also <a class="link" href="is_union.html" title="is_union">is_union</a>.
Currently (May 2005) only Visual C++ 8 has the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to correctly identify union types, and therefore make is_class function correctly.
Currently (May 2011) compilers more recent than Visual C++ 8, GCC-4.3, Greenhills
6.0, Intel-11.0, and Codegear have the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_IS_CLASS</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>Examples:</strong></span>

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@ -31,7 +30,7 @@
<span class="keyword">struct</span> <span class="identifier">is_convertible</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
</pre>
<p>
<span class="bold"><strong>Inherits:</strong></span> If an imaginary lvalue of type
<span class="bold"><strong>Inherits:</strong></span> If an imaginary rvalue of type
<code class="computeroutput"><span class="identifier">From</span></code> is convertible to type
<code class="computeroutput"><span class="identifier">To</span></code> then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
@ -107,7 +106,7 @@
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">is_convertible</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">value</span></code>
is an integral constant expression that evaluates to <span class="emphasis"><em>false</em></span>.
is an integral constant expression that evaluates to <span class="emphasis"><em>true</em></span>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">is_convertible</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code>

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@ -53,7 +52,8 @@
</li>
<li>
the compiler providing <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to detect empty classes.
to detect empty classes - this latter case can be tested for by checking
to see if the macro BOOST_IS_EMPTY is defined.
</li>
</ul></div>
<p>

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@ -54,10 +53,15 @@
can not be used with function types.
</p>
<p>
Without some (as yet unspecified) help from the compiler, is<span class="underline">pod
will never report that a class or struct is a POD; this is always safe, if
possibly sub-optimal. Currently (May 2005) only MWCW 9 and Visual C++ 8 have
the necessary compiler-</span>_intrinsics.
Without some (as yet unspecified) help from the compiler, is_pod will never
report that a class or struct is a POD; this is always safe, if possibly
sub-optimal. Currently (May 2011) compilers more recent than Visual C++ 8,
GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear have the necessary compiler
<a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a> to ensure that
this trait "just works". You may also test to see if the necessary
<a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a> are available
by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_IS_POD</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>

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@ -1,4 +1,3 @@
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@ -31,7 +30,7 @@
<span class="keyword">struct</span> <span class="identifier">is_stateless</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
</pre>
<p>
<span class="bold"><strong>Inherits:</strong></span> Ff T is a stateless type then
<span class="bold"><strong>Inherits:</strong></span> If T is a stateless type then
inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
otherwise from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
</p>
@ -66,9 +65,10 @@
<p>
Without some (as yet unspecified) help from the compiler, is_stateless will
never report that a class or struct is stateless; this is always safe, if
possibly sub-optimal. Currently (May 2005) only MWCW 9 and Visual C++ 8 have
the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to make this template work automatically.
possibly sub-optimal. Currently (May 2011) compilers more recent than Visual
C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear have the necessary
compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a> to
ensure that this trait "just works".
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
@ -47,9 +46,13 @@
inherit from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
unless the user explicitly specializes the template for their user-defined
union types, or unless the compiler supplies some unspecified intrinsic that
implements this functionality. Currently (May 2005) only Visual C++ 8 has
implements this functionality. Currently (May 2011) compilers more recent
than Visual C++ 8, GCC-4.3, Greenhills 6.0, Intel-11.0, and Codegear have
the necessary compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
to make this trait "just work" without user intervention.
to ensure that this trait "just works". You may also test to see
if the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
are available by checking to see if the macro <code class="computeroutput"><span class="identifier">BOOST_IS_UNION</span></code>
is defined.
</p>
<p>
<span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>

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@ -84,9 +83,15 @@
that evaluates to <span class="emphasis"><em>true</em></span>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">is_virtual_base_of</span><span class="special">&lt;</span><span class="identifier">Base</span><span class="special">,</span> <span class="identifier">Derived</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is an integral constant expression
<code class="computeroutput"><span class="identifier">is_virtual_base_of</span><span class="special">&lt;</span><span class="identifier">SomeClassType</span><span class="special">,</span>
<span class="identifier">SomeClassType</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is an integral constant expression
that evaluates to <span class="emphasis"><em>true</em></span>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">is_virtual_base_of</span><span class="special">&lt;</span><span class="identifier">NotAClassType</span><span class="special">,</span>
<span class="identifier">NotAClassType</span><span class="special">&gt;::</span><span class="identifier">value</span></code> is an integral constant expression
that evaluates to <span class="emphasis"><em>false</em></span>.
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">is_virtual_base_of</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">U</span><span class="special">&gt;::</span><span class="identifier">value_type</span></code>
is the type <code class="computeroutput"><span class="keyword">bool</span></code>.

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