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Add conditional trait.

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Update and regenerate docs.
Update type_traits.hpp and add trivial test case for it.

[SVN r65575]
This commit is contained in:
John Maddock
2010-09-24 17:12:08 +00:00
parent edd98db5fb
commit c77a72a7cc
36 changed files with 256 additions and 63 deletions
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[/===================================================================]
[section:conditional conditional]
[/===================================================================]
`#include <boost/type_traits/conditional.hpp>`
namespace boost {
template <bool B, class T, class U> struct __conditional;
}
If B is true, the member typedef type shall equal T. If B is false, the member typedef type shall equal F.
This trait is really just an alias for `boost::mpl::if_c`.
[endsect]

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method available to them.
</p>
<a name="boost_typetraits.background.type_traits"></a><h5>
<a name="id902179"></a>
<a name="id1004852"></a>
<a class="link" href="background.html#boost_typetraits.background.type_traits">Type Traits</a>
</h5>
<p>
@ -84,7 +84,7 @@
given.
</p>
<a name="boost_typetraits.background.implementation"></a><h5>
<a name="id902243"></a>
<a name="id1004916"></a>
<a class="link" href="background.html#boost_typetraits.background.implementation">Implementation</a>
</h5>
<p>
@ -174,7 +174,7 @@
in the default template.
</p>
<a name="boost_typetraits.background.optimized_copy"></a><h5>
<a name="id902979"></a>
<a name="id1005652"></a>
<a class="link" href="background.html#boost_typetraits.background.optimized_copy">Optimized copy</a>
</h5>
<p>
@ -247,7 +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="id908330"></a>
<a name="id1011003"></a>
<a class="link" href="background.html#boost_typetraits.background.was_it_worth_it_">Was it worth it?</a>
</h5>
<p>
@ -280,7 +280,7 @@
</li>
</ul></div>
<div class="table">
<a name="id908374"></a><p class="title"><b>Table&#160;1.1.&#160;Time taken to copy 1000 elements using `copy&lt;const T*, T*&gt;` (times
<a name="id1011047"></a><p class="title"><b>Table&#160;1.1.&#160;Time taken to copy 1000 elements using `copy&lt;const T*, T*&gt;` (times
in micro-seconds)</b></p>
<div class="table-contents"><table class="table" summary="Time taken to copy 1000 elements using `copy&lt;const T*, T*&gt;` (times
in micro-seconds)">
@ -379,7 +379,7 @@
</table></div>
</div>
<br class="table-break"><a name="boost_typetraits.background.pair_of_references"></a><h5>
<a name="id908524"></a>
<a name="id1011197"></a>
<a class="link" href="background.html#boost_typetraits.background.pair_of_references">Pair of References</a>
</h5>
<p>
@ -416,7 +416,7 @@
to hold non-reference types, references, and constant references:
</p>
<div class="table">
<a name="id908786"></a><p class="title"><b>Table&#160;1.2.&#160;Required Constructor Argument Types</b></p>
<a name="id1011459"></a><p class="title"><b>Table&#160;1.2.&#160;Required Constructor Argument Types</b></p>
<div class="table-contents"><table class="table" summary="Required Constructor Argument Types">
<colgroup>
<col>
@ -481,7 +481,7 @@
adds a reference to its type, unless it is already a reference.
</p>
<div class="table">
<a name="id908894"></a><p class="title"><b>Table&#160;1.3.&#160;Using add_reference to synthesize the correct constructor type</b></p>
<a name="id1011567"></a><p class="title"><b>Table&#160;1.3.&#160;Using add_reference to synthesize the correct constructor type</b></p>
<div class="table-contents"><table class="table" summary="Using add_reference to synthesize the correct constructor type">
<colgroup>
<col>
@ -597,7 +597,7 @@
easier to maintain and easier to understand.
</p>
<a name="boost_typetraits.background.conclusion"></a><h5>
<a name="id909363"></a>
<a name="id1012036"></a>
<a class="link" href="background.html#boost_typetraits.background.conclusion">Conclusion</a>
</h5>
<p>
@ -610,7 +610,7 @@
can be optimal as well as generic.
</p>
<a name="boost_typetraits.background.acknowledgements"></a><h5>
<a name="id909380"></a>
<a name="id1012053"></a>
<a class="link" href="background.html#boost_typetraits.background.acknowledgements">Acknowledgements</a>
</h5>
<p>
@ -618,7 +618,7 @@
comments when preparing this article.
</p>
<a name="background.references"></a><a name="boost_typetraits.background.references"></a><h5>
<a name="id909400"></a>
<a name="id1012073"></a>
<a class="link" href="background.html#boost_typetraits.background.references">References</a>
</h5>
<div class="orderedlist"><ol type="1">

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<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <a class="link" href="../reference/add_volatile.html" title="add_volatile">add_volatile</a><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="../reference/conditional.html" title="Conditional">conditional</a><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="../reference/common_type.html" title="common_type">common_type</a><span class="special">;</span>
@ -100,7 +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="id913408"></a>
<a name="id1016142"></a>
<a class="link" href="transform.html#boost_typetraits.category.transform.broken_compiler_workarounds_">Broken
Compiler Workarounds:</a>
</h5>

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<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_44_0"></a><h5>
<a name="id969631"></a>
<a name="id1072742"></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">
@ -43,7 +43,7 @@
</li>
</ul></div>
<a name="boost_typetraits.history.boost_1_42_0"></a><h5>
<a name="id969687"></a>
<a name="id1072798"></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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@ -99,7 +99,7 @@
of the following macros:
</p>
<div class="table">
<a name="id915555"></a><p class="title"><b>Table&#160;1.4.&#160;Macros for Compiler Intrinsics</b></p>
<a name="id1018290"></a><p class="title"><b>Table&#160;1.4.&#160;Macros for Compiler Intrinsics</b></p>
<div class="table-contents"><table class="table" summary="Macros for Compiler Intrinsics">
<colgroup>
<col>

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<dt><span class="section"><a href="reference/add_volatile.html"> add_volatile</a></span></dt>
<dt><span class="section"><a href="reference/aligned_storage.html"> aligned_storage</a></span></dt>
<dt><span class="section"><a href="reference/alignment_of.html"> alignment_of</a></span></dt>
<dt><span class="section"><a href="reference/conditional.html"> Conditional</a></span></dt>
<dt><span class="section"><a href="reference/common_type.html"> common_type</a></span></dt>
<dt><span class="section"><a href="reference/decay.html"> decay</a></span></dt>
<dt><span class="section"><a href="reference/extent.html"> extent</a></span></dt>
@ -108,6 +109,8 @@
<dt><span class="section"><a href="reference/remove_volatile.html"> remove_volatile</a></span></dt>
<dt><span class="section"><a href="reference/type_with_alignment.html"> type_with_alignment</a></span></dt>
</dl></div>
<p>
</p>
<p>
</p>
</div>

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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>
<div class="table">
<a name="id921834"></a><p class="title"><b>Table&#160;1.5.&#160;Examples</b></p>
<a name="id1024568"></a><p class="title"><b>Table&#160;1.5.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
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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>
<div class="table">
<a name="id922312"></a><p class="title"><b>Table&#160;1.6.&#160;Examples</b></p>
<a name="id1025046"></a><p class="title"><b>Table&#160;1.6.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

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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>
<div class="table">
<a name="id922834"></a><p class="title"><b>Table&#160;1.7.&#160;Examples</b></p>
<a name="id1025568"></a><p class="title"><b>Table&#160;1.7.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
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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>
<div class="table">
<a name="id923444"></a><p class="title"><b>Table&#160;1.8.&#160;Examples</b></p>
<a name="id1026178"></a><p class="title"><b>Table&#160;1.8.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
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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>
<div class="table">
<a name="id923942"></a><p class="title"><b>Table&#160;1.9.&#160;Examples</b></p>
<a name="id1026676"></a><p class="title"><b>Table&#160;1.9.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/add_rvalue_reference.html
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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>
<div class="table">
<a name="id924446"></a><p class="title"><b>Table&#160;1.10.&#160;Examples</b></p>
<a name="id1027180"></a><p class="title"><b>Table&#160;1.10.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/add_volatile.html
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@ -53,7 +53,7 @@
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>
<div class="table">
<a name="id925014"></a><p class="title"><b>Table&#160;1.11.&#160;Examples</b></p>
<a name="id1027748"></a><p class="title"><b>Table&#160;1.11.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

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<link rel="home" href="../../index.html" title="Chapter&#160;1.&#160;Boost.TypeTraits">
<link rel="up" href="../reference.html" title="Alphabetical Reference">
<link rel="prev" href="aligned_storage.html" title="aligned_storage">
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@ -20,7 +20,7 @@
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@ -76,7 +76,7 @@
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<meta name="generator" content="DocBook XSL Stylesheets V1.74.0">
<link rel="home" href="../../index.html" title="Chapter&#160;1.&#160;Boost.TypeTraits">
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@ -20,7 +20,7 @@
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template arguments is 3.
</p>
<a name="boost_typetraits.reference.common_type.configuration_macros"></a><h5>
<a name="id928233"></a>
<a name="id1031139"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.configuration_macros">Configuration
macros</a>
</h5>
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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="id928289"></a>
<a name="id1031195"></a>
<a class="link" href="common_type.html#boost_typetraits.reference.common_type.tutorial">Tutorial</a>
</h5>
<p>
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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="id928590"></a>
<a name="id1031496"></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>
@ -160,7 +160,7 @@
<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="id928890"></a>
<a name="id1031797"></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>
@ -240,7 +240,7 @@
<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="id929759"></a>
<a name="id1032664"></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>
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<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="id930041"></a>
<a name="id1032946"></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>
@ -303,7 +303,7 @@
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="id930325"></a>
<a name="id1033231"></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>
@ -344,7 +344,7 @@
</tr></table>
<hr>
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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>
<div class="table">
<a name="id930714"></a><p class="title"><b>Table&#160;1.12.&#160;Examples</b></p>
<a name="id1033620"></a><p class="title"><b>Table&#160;1.12.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

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@ -49,7 +49,7 @@
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>
<div class="table">
<a name="id933358"></a><p class="title"><b>Table&#160;1.13.&#160;Examples</b></p>
<a name="id1036264"></a><p class="title"><b>Table&#160;1.13.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

4
doc/html/boost_typetraits/reference/function_traits.html
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@ -59,7 +59,7 @@
</p></td></tr>
</table></div>
<div class="table">
<a name="id933731"></a><p class="title"><b>Table&#160;1.14.&#160;Function Traits Members</b></p>
<a name="id1036637"></a><p class="title"><b>Table&#160;1.14.&#160;Function Traits Members</b></p>
<div class="table-contents"><table class="table" summary="Function Traits Members">
<colgroup>
<col>
@ -122,7 +122,7 @@
</table></div>
</div>
<br class="table-break"><div class="table">
<a name="id933949"></a><p class="title"><b>Table&#160;1.15.&#160;Examples</b></p>
<a name="id1036854"></a><p class="title"><b>Table&#160;1.15.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/integral_promotion.html
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@ -49,7 +49,7 @@
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>
<div class="table">
<a name="id940687"></a><p class="title"><b>Table&#160;1.16.&#160;Examples</b></p>
<a name="id1043593"></a><p class="title"><b>Table&#160;1.16.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/make_signed.html
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@ -54,7 +54,7 @@
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>
<div class="table">
<a name="id961588"></a><p class="title"><b>Table&#160;1.17.&#160;Examples</b></p>
<a name="id1065314"></a><p class="title"><b>Table&#160;1.17.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/make_unsigned.html
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@ -54,7 +54,7 @@
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>
<div class="table">
<a name="id962071"></a><p class="title"><b>Table&#160;1.18.&#160;Examples</b></p>
<a name="id1066343"></a><p class="title"><b>Table&#160;1.18.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/promote.html
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@ -51,7 +51,7 @@
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>
<div class="table">
<a name="id963756"></a><p class="title"><b>Table&#160;1.19.&#160;Examples</b></p>
<a name="id1066867"></a><p class="title"><b>Table&#160;1.19.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/remove_all_extents.html
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@ -54,7 +54,7 @@
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>
<div class="table">
<a name="id964853"></a><p class="title"><b>Table&#160;1.20.&#160;Examples</b></p>
<a name="id1067964"></a><p class="title"><b>Table&#160;1.20.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/remove_const.html
View File

@ -53,7 +53,7 @@
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>
<div class="table">
<a name="id965396"></a><p class="title"><b>Table&#160;1.21.&#160;Examples</b></p>
<a name="id1069600"></a><p class="title"><b>Table&#160;1.21.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/remove_cv.html
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@ -53,7 +53,7 @@
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>
<div class="table">
<a name="id967020"></a><p class="title"><b>Table&#160;1.22.&#160;Examples</b></p>
<a name="id1070131"></a><p class="title"><b>Table&#160;1.22.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/remove_extent.html
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@ -54,7 +54,7 @@
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>
<div class="table">
<a name="id967549"></a><p class="title"><b>Table&#160;1.23.&#160;Examples</b></p>
<a name="id1070660"></a><p class="title"><b>Table&#160;1.23.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/remove_pointer.html
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@ -55,7 +55,7 @@
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>
<div class="table">
<a name="id968103"></a><p class="title"><b>Table&#160;1.24.&#160;Examples</b></p>
<a name="id1071214"></a><p class="title"><b>Table&#160;1.24.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/remove_reference.html
View File

@ -53,7 +53,7 @@
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>
<div class="table">
<a name="id968616"></a><p class="title"><b>Table&#160;1.25.&#160;Examples</b></p>
<a name="id1071727"></a><p class="title"><b>Table&#160;1.25.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

2
doc/html/boost_typetraits/reference/remove_volatile.html
View File

@ -53,7 +53,7 @@
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>
<div class="table">
<a name="id969118"></a><p class="title"><b>Table&#160;1.26.&#160;Examples</b></p>
<a name="id1072229"></a><p class="title"><b>Table&#160;1.26.&#160;Examples</b></p>
<div class="table-contents"><table class="table" summary="Examples">
<colgroup>
<col>

5
doc/html/index.html
View File

@ -30,7 +30,7 @@
Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Robert
Ramey and Jeremy Siek</p></div>
<div><div class="legalnotice">
<a name="id902030"></a><p>
<a name="id1004703"></a><p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
@ -89,6 +89,7 @@
<dt><span class="section"><a href="boost_typetraits/reference/add_volatile.html"> add_volatile</a></span></dt>
<dt><span class="section"><a href="boost_typetraits/reference/aligned_storage.html"> aligned_storage</a></span></dt>
<dt><span class="section"><a href="boost_typetraits/reference/alignment_of.html"> alignment_of</a></span></dt>
<dt><span class="section"><a href="boost_typetraits/reference/conditional.html"> Conditional</a></span></dt>
<dt><span class="section"><a href="boost_typetraits/reference/common_type.html"> common_type</a></span></dt>
<dt><span class="section"><a href="boost_typetraits/reference/decay.html"> decay</a></span></dt>
<dt><span class="section"><a href="boost_typetraits/reference/extent.html"> extent</a></span></dt>
@ -171,7 +172,7 @@
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"><p><small>Last revised: September 11, 2010 at 19:00:56 +0100</small></p></td>
<td align="left"><p><small>Last revised: September 17, 2010 at 13:12:03 +0100</small></p></td>
<td align="right"><div class="copyright-footer"></div></td>
</tr></table>
<hr>

3
doc/transform_traits.qbk
View File

@ -35,6 +35,9 @@ result of applying the transformation to the template argument `T`.
template <class T>
struct __add_volatile;
template <bool B, class T, class U>
struct __conditional;
template <class... T>
struct __common_type;

2
doc/type_traits.qbk
View File

@ -108,6 +108,7 @@
[def __add_volatile [link boost_typetraits.reference.add_volatile add_volatile]]
[def __add_cv [link boost_typetraits.reference.add_cv add_cv]]
[def __common_type [link boost_typetraits.reference.common_type common_type]]
[def __conditional [link boost_typetraits.reference.conditional conditional]]
[def __type_with_alignment [link boost_typetraits.reference.type_with_alignment type_with_alignment]]
[def __aligned_storage [link boost_typetraits.reference.aligned_storage aligned_storage]]
@ -172,6 +173,7 @@ that is the result of the transformation.
[include add_volatile.qbk]
[include aligned_storage.qbk]
[include alignment_of.qbk]
[include conditional.qbk]
[include common_type.qbk]
[include decay.qbk]
[include extent.qbk]

26
include/boost/type_traits.hpp
View File

@ -12,10 +12,19 @@
#include "boost/type_traits/add_const.hpp"
#include "boost/type_traits/add_cv.hpp"
#include "boost/type_traits/add_lvalue_reference.hpp"
#include "boost/type_traits/add_pointer.hpp"
#include "boost/type_traits/add_reference.hpp"
#include "boost/type_traits/add_rvalue_reference.hpp"
#include "boost/type_traits/add_volatile.hpp"
#include "boost/type_traits/aligned_storage.hpp"
#include "boost/type_traits/alignment_of.hpp"
#include "boost/type_traits/common_type.hpp"
#include "boost/type_traits/conditional.hpp"
#include "boost/type_traits/decay.hpp"
#include "boost/type_traits/extent.hpp"
#include "boost/type_traits/floating_point_promotion.hpp"
#include "boost/type_traits/function_traits.hpp"
#if !defined(__BORLANDC__) && !defined(__CUDACC__)
#include "boost/type_traits/has_new_operator.hpp"
#endif
@ -28,14 +37,13 @@
#include "boost/type_traits/has_trivial_copy.hpp"
#include "boost/type_traits/has_trivial_destructor.hpp"
#include "boost/type_traits/has_virtual_destructor.hpp"
#include "boost/type_traits/is_signed.hpp"
#include "boost/type_traits/is_unsigned.hpp"
#include "boost/type_traits/is_abstract.hpp"
#include "boost/type_traits/is_arithmetic.hpp"
#include "boost/type_traits/is_array.hpp"
#include "boost/type_traits/is_base_and_derived.hpp"
#include "boost/type_traits/is_base_of.hpp"
#include "boost/type_traits/is_class.hpp"
#include <boost/type_traits/is_complex.hpp>
#include "boost/type_traits/is_compound.hpp"
#include "boost/type_traits/is_const.hpp"
#include "boost/type_traits/is_convertible.hpp"
@ -46,6 +54,7 @@
#include "boost/type_traits/is_function.hpp"
#include "boost/type_traits/is_fundamental.hpp"
#include "boost/type_traits/is_integral.hpp"
#include "boost/type_traits/is_lvalue_reference.hpp"
#include "boost/type_traits/is_member_function_pointer.hpp"
#include "boost/type_traits/is_member_object_pointer.hpp"
#include "boost/type_traits/is_member_pointer.hpp"
@ -55,16 +64,18 @@
#include "boost/type_traits/is_pointer.hpp"
#include "boost/type_traits/is_reference.hpp"
#include "boost/type_traits/is_rvalue_reference.hpp"
#include "boost/type_traits/is_lvalue_reference.hpp"
#include "boost/type_traits/is_signed.hpp"
#include "boost/type_traits/is_same.hpp"
#include "boost/type_traits/is_scalar.hpp"
#include "boost/type_traits/is_stateless.hpp"
#include "boost/type_traits/is_union.hpp"
#include "boost/type_traits/is_unsigned.hpp"
#include "boost/type_traits/is_void.hpp"
#include "boost/type_traits/is_virtual_base_of.hpp"
#include "boost/type_traits/is_volatile.hpp"
#include <boost/type_traits/make_unsigned.hpp>
#include <boost/type_traits/make_signed.hpp>
#include "boost/type_traits/rank.hpp"
#include "boost/type_traits/extent.hpp"
#include "boost/type_traits/remove_bounds.hpp"
#include "boost/type_traits/remove_extent.hpp"
#include "boost/type_traits/remove_all_extents.hpp"
@ -74,17 +85,10 @@
#include "boost/type_traits/remove_reference.hpp"
#include "boost/type_traits/remove_volatile.hpp"
#include "boost/type_traits/type_with_alignment.hpp"
#include "boost/type_traits/function_traits.hpp"
#include "boost/type_traits/aligned_storage.hpp"
#include "boost/type_traits/floating_point_promotion.hpp"
#if !(defined(__sgi) && defined(__EDG_VERSION__) && (__EDG_VERSION__ == 238))
#include "boost/type_traits/integral_promotion.hpp"
#include "boost/type_traits/promote.hpp"
#endif
#include <boost/type_traits/make_unsigned.hpp>
#include <boost/type_traits/make_signed.hpp>
#include <boost/type_traits/decay.hpp>
#include <boost/type_traits/is_complex.hpp>
#include "boost/type_traits/ice.hpp"

25
include/boost/type_traits/conditional.hpp Normal file
View File

@ -0,0 +1,25 @@
// (C) Copyright John Maddock 2010.
// Use, modification and distribution are subject to 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).
//
// See http://www.boost.org/libs/type_traits for most recent version including documentation.
#ifndef BOOST_TT_CONDITIONAL_HPP_INCLUDED
#define BOOST_TT_CONDITIONAL_HPP_INCLUDED
#include <boost/mpl/if.hpp>
namespace boost {
template <bool b, class T, class U>
struct conditional : public mpl::if_c<b, T, U>
{
};
} // namespace boost
#endif // BOOST_TT_CONDITIONAL_HPP_INCLUDED

31
test/conditional_test.cpp Normal file
View File

@ -0,0 +1,31 @@
// (C) Copyright John Maddock 2010.
// Use, modification and distribution are subject to 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)
#include "test.hpp"
#include "check_integral_constant.hpp"
#ifdef TEST_STD
# include <type_traits>
#else
# include <boost/type_traits/conditional.hpp>
#endif
#include <boost/type_traits/is_same.hpp>
TT_TEST_BEGIN(conditional)
BOOST_CHECK_INTEGRAL_CONSTANT((::tt::is_same< ::tt::conditional<true, int, long>::type, int>::value), true);
BOOST_CHECK_INTEGRAL_CONSTANT((::tt::is_same< ::tt::conditional<false, int, long>::type, long>::value), true);
BOOST_CHECK_INTEGRAL_CONSTANT((::tt::is_same< ::tt::conditional<true, int, long>::type, long>::value), false);
BOOST_CHECK_INTEGRAL_CONSTANT((::tt::is_same< ::tt::conditional<false, int, long>::type, int>::value), false);
TT_TEST_END

103
test/type_traits_test.cpp Normal file
View File

@ -0,0 +1,103 @@
// (C) Copyright John Maddock 2010.
// Use, modification and distribution are subject to 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)
#include <boost/type_traits.hpp>
//
// Just check that each trait actually exists, not
// that it gives the correct answer, we do that elsewhere:
//
typedef boost::add_const<int>::type t1;
typedef boost::add_cv<int>::type t2;
typedef boost::add_lvalue_reference<int>::type t3;
typedef boost::add_pointer<int>::type t4;
typedef boost::add_reference<int>::type t5;
typedef boost::add_rvalue_reference<int>::type t6;
typedef boost::add_volatile<int>::type t7;
typedef boost::aligned_storage<2>::type t8;
typedef boost::alignment_of<int>::type t9;
typedef boost::conditional<true, int, long>::type t10;
typedef boost::common_type<int, long>::type t11;
typedef boost::decay<int[2] >::type t12;
typedef boost::extent<int[3] >::type t13;
typedef boost::floating_point_promotion<int>::type t14;
typedef boost::function_traits<int (int) > t15;
typedef boost::has_new_operator<int> t16;
typedef boost::has_nothrow_assign<int> t17;
typedef boost::has_nothrow_constructor<int> t18;
typedef boost::has_nothrow_copy<int> t19;
typedef boost::has_nothrow_copy_constructor<int> t20;
typedef boost::has_nothrow_default_constructor<int> t21;
typedef boost::has_trivial_assign<int> t22;
typedef boost::has_trivial_constructor<int> t23;
typedef boost::has_trivial_copy<int> t24;
typedef boost::has_trivial_copy_constructor<int> t25;
typedef boost::has_trivial_default_constructor<int> t26;
typedef boost::has_trivial_destructor<int> t27;
typedef boost::has_virtual_destructor<int> t28;
typedef boost::integral_constant<int, 2> t29;
typedef boost::integral_promotion<short>::type t30;
typedef boost::is_abstract<int>::type t31;
typedef boost::is_arithmetic<int>::type t32;
typedef boost::is_array<int>::type t33;
typedef boost::is_base_of<int, long>::type t34;
typedef boost::is_class<int>::type t35;
typedef boost::is_complex<int>::type t36;
typedef boost::is_compound<int>::type t37;
typedef boost::is_const<int>::type t38;
typedef boost::is_convertible<int, long>::type t39;
typedef boost::is_empty<int>::type t40;
typedef boost::is_enum<int>::type t41;
typedef boost::is_floating_point<int>::type t42;
typedef boost::is_function<int>::type t43;
typedef boost::is_fundamental<int>::type t44;
typedef boost::is_integral<int>::type t45;
typedef boost::is_lvalue_reference<int>::type t46;
typedef boost::is_member_function_pointer<int>::type t47;
typedef boost::is_member_object_pointer<int>::type t48;
typedef boost::is_member_pointer<int>::type t49;
typedef boost::is_object<int>::type t50;
typedef boost::is_pod<int>::type t51;
typedef boost::is_pointer<int>::type t52;
typedef boost::is_polymorphic<int>::type t53;
typedef boost::is_reference<int>::type t54;
typedef boost::is_rvalue_reference<int>::type t55;
typedef boost::is_same<int, int>::type t56;
typedef boost::is_scalar<int>::type t57;
typedef boost::is_signed<int>::type t58;
typedef boost::is_stateless<int>::type t59;
typedef boost::is_union<int>::type t60;
typedef boost::is_unsigned<int>::type t61;
typedef boost::is_virtual_base_of<int, int>::type t62;
typedef boost::is_void<int>::type t63;
typedef boost::is_volatile<int>::type t64;
typedef boost::make_signed<int>::type t65;
typedef boost::make_unsigned<int>::type t66;
typedef boost::promote<int>::type t67;
typedef boost::rank<int>::type t68;
typedef boost::remove_all_extents<int>::type t69;
typedef boost::remove_const<int>::type t70;
typedef boost::remove_cv<int>::type t71;
typedef boost::remove_extent<int>::type t72;
typedef boost::remove_pointer<int>::type t73;
typedef boost::remove_reference<int>::type t74;
typedef boost::remove_volatile<int>::type t75;
typedef boost::type_with_alignment<4>::type t76;
int main()
{
return 0;
}