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Merge pull request #28 from ohhmm/develop

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introducing get_tag and math sigmoid
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Edward Diener
2017-07-03 01:33:38 -04:00
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parent 3b126bdf8c 525c773836
commit 4265eb6319
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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" />
<title>The MPL Reference Manual: BOOST_MPL_GET_TAG_DEF</title>
<link rel="stylesheet" href="../style.css" type="text/css" />
</head>
<body class="docframe refmanual">
<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./introspection.html" class="navigation-link">Prev</a>&nbsp;<a href="./has-xxx-trait-named-def.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./introspection.html" class="navigation-link">Back</a>&nbsp;<a href="./get-tag-def.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./introspection.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./macros.html" class="navigation-link">Macros</a> / <a href="./introspection.html" class="navigation-link">Introspection</a> / <a href="./has-xxx-trait-def.html" class="navigation-link">BOOST_MPL_GET_TAG_DEF</a></td>
</tr></table><div class="header-separator"></div>
<div class="section" id="boost-mpl-has-xxx-trait-def">
<h1><a class="toc-backref" href="./introspection.html#id1595">BOOST_MPL_GET_TAG_DEF</a></h1>
<div class="section" id="id1329">
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
#define <a href="./has-xxx-trait-def.html" class="identifier">BOOST_MPL_GET_TAG_DEF</a>(name) \
<em>unspecified token sequence</em> \
/**/
</pre>
</div>
<div class="section" id="id1330">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p>Expands into a definition of a lazy getter <a class="reference internal" href="./metafunction.html">Metafunction</a> <tt class="literal"><span class="pre">get_tag_name</span></tt>
such that for any type <tt class="literal"><span class="pre">x</span></tt> <tt class="literal"><span class="pre">get_tag_name&lt;x&gt;::type</span> <span class="pre">is</span> <span class="pre">type</span></tt> where
<tt class="literal"><span class="pre">name</span></tt> is a nested type member of <tt class="literal"><span class="pre">x</span></tt>.</p>
</div>
<div class="section" id="id1331">
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
<pre class="literal-block">
#include &lt;<a href="../../../../boost/mpl/get_tag.hpp" class="header">boost/mpl/get_tag.hpp</a>&gt;
</pre>
</div>
<div class="section" id="id1332">
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
<table border="1" class="docutils table">
<colgroup>
<col width="15%" />
<col width="32%" />
<col width="53%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">Parameter</th>
<th class="head">Requirement</th>
<th class="head">Description</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><tt class="literal"><span class="pre">name</span></tt></td>
<td>A legal identifier token</td>
<td>A name of the member to get.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="id1333">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<p>For any legal C++ identifier <tt class="literal"><span class="pre">name</span></tt>:</p>
<pre class="literal-block">
<a href="./has-xxx-trait-def.html" class="identifier">BOOST_MPL_GET_TAG_DEF</a>(name)
</pre>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Precondition:</th><td class="field-body"><p class="first">Appears at namespace scope.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">None.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
<pre class="last literal-block">
namespace boost { namespace mpl {</pre>
<pre class="last literal-block">
template<typename T>&lt;class T&gt;
struct get_##name {
typedef typename T::name type;
};</pre>
<pre class="last literal-block">
}}<typename T>
</pre>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="id1334">
<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
<pre class="literal-block">
struct test_type_get_tag_def;
<a href="get-tag-def.html" class="identifier">BOOST_MPL_GET_TAG_DEF</a>(a_tag);
namespace boost { namespace mpl {
struct test_type_get_tag_def
{
typedef int a_tag;
};
}}
typedef boost::mpl::get_a_tag&lt;<test_type_get_tag_def>test_type_get_tag_def&gt;::type got_the_tag;
</pre>
</div>
<div class="section" id="id1335">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference internal" href="./macros.html">Macros</a>, <a class="reference internal" href="./has-xxx-trait-named-def.html">BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF</a>
<!-- Macros/Introspection/BOOST_MPL_GET_TAG_DEF -->
</div>
</div>
<div class="footer-separator"></div>
<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./introspection.html" class="navigation-link">Prev</a>&nbsp;<a href="./has-xxx-template-named-def.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./introspection.html" class="navigation-link">Back</a>&nbsp;<a href="./get-tag-def.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./introspection.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
<td><div class="copyright-footer"><div class="copyright">Copyright © 2017 Sergey Krivonos and Edward Diener</div>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body>
</html>

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<!-- Software License, Version 1.0. (See accompanying -->
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
<ul class="toc simple" id="outline">
<li><a class="reference internal" href="./get-tag-def.html" id="id1615">BOOST_MPL_GET_TAG_DEF</a></li>
<li><a class="reference internal" href="./has-xxx-template-def.html" id="id1593">BOOST_MPL_HAS_XXX_TEMPLATE_DEF</a></li>
<li><a class="reference internal" href="./has-xxx-template-named-def.html" id="id1594">BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF</a></li>
<li><a class="reference internal" href="./has-xxx-trait-def.html" id="id1595">BOOST_MPL_HAS_XXX_TRAIT_DEF</a></li>

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@ -276,6 +276,7 @@
</ul>
</li>
<li><a class="reference internal" href="./introspection.html" id="id1592">Introspection</a><ul class="toc" id="outline">
<li><a class="reference internal" href="./get-tag-def.html" id="id1615">BOOST_MPL_GET_TAG_DEF</a></li>
<li><a class="reference internal" href="./has-xxx-template-def.html" id="id1593">BOOST_MPL_HAS_XXX_TEMPLATE_DEF</a></li>
<li><a class="reference internal" href="./has-xxx-template-named-def.html" id="id1594">BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF</a></li>
<li><a class="reference internal" href="./has-xxx-trait-def.html" id="id1595">BOOST_MPL_HAS_XXX_TRAIT_DEF</a></li>

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#ifndef BOOST_MPL_GET_TAG_HPP_INCLUDED
#define BOOST_MPL_GET_TAG_HPP_INCLUDED
// Copyright Sergey Krivonos 2017
//
// 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)
//
// See http://www.boost.org/libs/mpl for documentation.
// $Id$
// $Date$
// $Revision$
#define BOOST_MPL_GET_TAG_DEF(TAG) \
namespace boost { namespace mpl { \
template<typename T> \
struct get_##TAG { \
typedef typename T::TAG type; \
}; \
}}
#endif

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test/Jamfile.v2
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@ -37,6 +37,7 @@ compile find_if.cpp ;
compile fold.cpp ;
run for_each.cpp ;
compile front.cpp ;
compile get_tag_def.cpp ;
compile has_xxx.cpp ;
compile identity.cpp ;
compile if.cpp ;

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// Copyright Sergey Krivonos 2017
//
// 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)
//
// See http://www.boost.org/libs/mpl for documentation.
// $Id$
// $Date$
// $Revision$
#include <boost/mpl/get_tag.hpp>
#include <boost/mpl/aux_/test.hpp>
#include <boost/mpl/aux_/test/assert.hpp>
#include <boost/type_traits/is_same.hpp>
struct test_type_get_tag_def
{
typedef int a_tag;
};
BOOST_MPL_GET_TAG_DEF(a_tag);
MPL_TEST_CASE()
{
MPL_ASSERT(( is_same<int, boost::mpl::get_a_tag<test_type_get_tag_def>::type> ));
MPL_ASSERT(( is_same<test_type_get_tag_def::a_tag, boost::mpl::get_a_tag<test_type_get_tag_def>::type> ));
}