diff options
Diffstat (limited to 'doc/html/boost/get_id1673528.html')
-rwxr-xr-x | doc/html/boost/get_id1673528.html | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/doc/html/boost/get_id1673528.html b/doc/html/boost/get_id1673528.html deleted file mode 100755 index ce5a967398..0000000000 --- a/doc/html/boost/get_id1673528.html +++ /dev/null @@ -1,114 +0,0 @@ -<html> -<head> -<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> -<title>Function get</title> -<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> -<meta name="generator" content="DocBook XSL Stylesheets V1.76.1"> -<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> -<link rel="up" href="../variant/reference.html#header.boost.variant.get_hpp" title="Header <boost/variant/get.hpp>"> -<link rel="prev" href="bad_get.html" title="Class bad_get"> -<link rel="next" href="bad_visit.html" title="Class bad_visit"> -</head> -<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> -<table cellpadding="2" width="100%"><tr> -<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td> -<td align="center"><a href="../../../index.html">Home</a></td> -<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td> -<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> -<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> -<td align="center"><a href="../../../more/index.htm">More</a></td> -</tr></table> -<hr> -<div class="spirit-nav"> -<a accesskey="p" href="bad_get.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../variant/reference.html#header.boost.variant.get_hpp"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="bad_visit.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> -</div> -<div class="refentry"> -<a name="boost.get_id1673528"></a><div class="titlepage"></div> -<div class="refnamediv"> -<h2><span class="refentrytitle">Function get</span></h2> -<p>boost::get — Retrieves a value of a specified type from a given - <code class="computeroutput"><a class="link" href="variant.html" title="Class template variant">variant</a></code>.</p> -</div> -<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> -<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../variant/reference.html#header.boost.variant.get_hpp" title="Header <boost/variant/get.hpp>">boost/variant/get.hpp</a>> - -</span> -<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">,</span> <span class="keyword">typename</span> T1<span class="special">,</span> <span class="keyword">typename</span> T2<span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="keyword">typename</span> TN<span class="special">></span> - <span class="identifier">U</span> <span class="special">*</span> <span class="identifier">get</span><span class="special">(</span><a class="link" href="variant.html" title="Class template variant">variant</a><span class="special"><</span><span class="identifier">T1</span><span class="special">,</span> <span class="identifier">T2</span><span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="identifier">TN</span><span class="special">></span> <span class="special">*</span> operand<span class="special">)</span><span class="special">;</span> -<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">,</span> <span class="keyword">typename</span> T1<span class="special">,</span> <span class="keyword">typename</span> T2<span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="keyword">typename</span> TN<span class="special">></span> - <span class="keyword">const</span> <span class="identifier">U</span> <span class="special">*</span> <span class="identifier">get</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="variant.html" title="Class template variant">variant</a><span class="special"><</span><span class="identifier">T1</span><span class="special">,</span> <span class="identifier">T2</span><span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="identifier">TN</span><span class="special">></span> <span class="special">*</span> operand<span class="special">)</span><span class="special">;</span> -<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">,</span> <span class="keyword">typename</span> T1<span class="special">,</span> <span class="keyword">typename</span> T2<span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="keyword">typename</span> TN<span class="special">></span> - <span class="identifier">U</span> <span class="special">&</span> <span class="identifier">get</span><span class="special">(</span><a class="link" href="variant.html" title="Class template variant">variant</a><span class="special"><</span><span class="identifier">T1</span><span class="special">,</span> <span class="identifier">T2</span><span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="identifier">TN</span><span class="special">></span> <span class="special">&</span> operand<span class="special">)</span><span class="special">;</span> -<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">,</span> <span class="keyword">typename</span> T1<span class="special">,</span> <span class="keyword">typename</span> T2<span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="keyword">typename</span> TN<span class="special">></span> - <span class="keyword">const</span> <span class="identifier">U</span> <span class="special">&</span> <span class="identifier">get</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="variant.html" title="Class template variant">variant</a><span class="special"><</span><span class="identifier">T1</span><span class="special">,</span> <span class="identifier">T2</span><span class="special">,</span> <span class="special">...</span><span class="special">,</span> <span class="identifier">TN</span><span class="special">></span> <span class="special">&</span> operand<span class="special">)</span><span class="special">;</span></pre></div> -<div class="refsect1"> -<a name="id3711087"></a><h2>Description</h2> -<p>The <code class="computeroutput">get</code> function allows run-time checked, - type-safe retrieval of the content of the given - <code class="computeroutput"><a class="link" href="variant.html" title="Class template variant">variant</a></code>. The function succeeds - only if the content is of the specified type <code class="computeroutput">U</code>, with - failure indicated as described below.</p> -<p><span class="bold"><strong>Warning</strong></span>: After either - <code class="computeroutput">operand</code> or its content is destroyed (e.g., when the - given <code class="computeroutput"><a class="link" href="variant.html" title="Class template variant">variant</a></code> is assigned a - value of different type), the returned reference is invalidated. - Thus, significant care and caution must be extended when handling - the returned reference.</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term">Notes:</span></p></td> -<td>As part of its guarantee of type-safety, <code class="computeroutput">get</code> - enforces <code class="computeroutput">const</code>-correctness. Thus, the specified type - <code class="computeroutput">U</code> must be <code class="computeroutput">const</code>-qualified whenever - <code class="computeroutput">operand</code> or its content is likewise - <code class="computeroutput">const</code>-qualified. The converse, however, is not required: - that is, the specified type <code class="computeroutput">U</code> may be - <code class="computeroutput">const</code>-qualified even when <code class="computeroutput">operand</code> and its - content are not.</td> -</tr> -<tr> -<td><p><span class="term">Returns:</span></p></td> -<td>If passed a pointer, <code class="computeroutput">get</code> returns a pointer to - the value content if it is of the specified type <code class="computeroutput">U</code>; - otherwise, a null pointer is returned. If passed a reference, - <code class="computeroutput">get</code> returns a reference to the value content if it is of - the specified type <code class="computeroutput">U</code>; otherwise, an exception is thrown - (see below).</td> -</tr> -<tr> -<td><p><span class="term">Throws:</span></p></td> -<td>Overloads taking a - <code class="computeroutput"><a class="link" href="variant.html" title="Class template variant">variant</a></code> pointer will not - throw; the overloads taking a - <code class="computeroutput"><a class="link" href="variant.html" title="Class template variant">variant</a></code> reference throw - <code class="computeroutput"><a class="link" href="bad_get.html" title="Class bad_get">bad_get</a></code> if the content is not of - the specified type <code class="computeroutput">U</code>.</td> -</tr> -<tr> -<td><p><span class="term">Rationale:</span></p></td> -<td>While visitation via - <code class="computeroutput"><a class="link" href="apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code> - is generally preferred due to its greater safety, <code class="computeroutput">get</code> may - may be more convenient in some cases due to its straightforward - usage.</td> -</tr> -</tbody> -</table></div> -</div> -</div> -<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> -<td align="left"></td> -<td align="right"><div class="copyright-footer">Copyright © 2002, 2003 Eric Friedman, Itay Maman<p>Distributed under the Boost Software License, Version 1.0. - (See accompanying file <code class="filename">LICENSE_1_0.txt</code> 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> -</div></td> -</tr></table> -<hr> -<div class="spirit-nav"> -<a accesskey="p" href="bad_get.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../variant/reference.html#header.boost.variant.get_hpp"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="bad_visit.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> -</div> -</body> -</html> |