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diff --git a/doc/html/boost/proto/operator_idm45506984344016.html b/doc/html/boost/proto/operator_idm45506984344016.html new file mode 100644 index 0000000000..aa19aa7284 --- /dev/null +++ b/doc/html/boost/proto/operator_idm45506984344016.html @@ -0,0 +1,118 @@ +<!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"> +<title>Function operator,</title> +<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> +<meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> +<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> +<link rel="up" href="../../proto/reference.html#header.boost.proto.transform.env_hpp" title="Header <boost/proto/transform/env.hpp>"> +<link rel="prev" href="env_var_idm45506984357536.html" title="Function env_var"> +<link rel="next" href="_env_var.html" title="Struct template _env_var"> +</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="env_var_idm45506984357536.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.transform.env_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="_env_var.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +<div class="refentry"> +<a name="boost.proto.operator_idm45506984344016"></a><div class="titlepage"></div> +<div class="refnamediv"> +<h2><span class="refentrytitle">Function operator,</span></h2> +<p>boost::proto::operator, — + For composing a larger transform environment from two smaller ones. + </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="../../proto/reference.html#header.boost.proto.transform.env_hpp" title="Header <boost/proto/transform/env.hpp>">boost/proto/transform/env.hpp</a>> + +</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Env<span class="special">,</span> <span class="keyword">typename</span> Key<span class="special">,</span> <span class="keyword">typename</span> Value<span class="special">></span> + <a class="link" href="env.html" title="Struct template env">proto::env</a><span class="special"><</span><span class="identifier">Key</span><span class="special">,</span> <span class="identifier">Value</span><span class="special">,</span> <em class="replaceable"><code><span class="identifier">UNCVREF</span></code></em><span class="special">(</span><span class="keyword">typename</span> <a class="link" href="result_of/as_env.html" title="Struct template as_env">proto::result_of::as_env</a><span class="special"><</span><span class="identifier">Env</span> <span class="special">&</span><span class="special">></span><span class="special">::</span><span class="identifier">type</span><span class="special">)</span><span class="special">></span> + <span class="keyword">operator</span><span class="special">,</span><span class="special">(</span><span class="identifier">Env</span> <span class="special">&</span> other<span class="special">,</span> <a class="link" href="env.html" title="Struct template env">proto::env</a><span class="special"><</span><span class="identifier">Key</span><span class="special">,</span> <span class="identifier">Value</span><span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> head<span class="special">)</span><span class="special">;</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Env<span class="special">,</span> <span class="keyword">typename</span> Key<span class="special">,</span> <span class="keyword">typename</span> Value<span class="special">></span> + <a class="link" href="env.html" title="Struct template env">proto::env</a><span class="special"><</span><span class="identifier">Key</span><span class="special">,</span> <span class="identifier">Value</span><span class="special">,</span> <em class="replaceable"><code><span class="identifier">UNCVREF</span></code></em><span class="special">(</span><span class="keyword">typename</span> <a class="link" href="result_of/as_env.html" title="Struct template as_env">proto::result_of::as_env</a><span class="special"><</span><span class="identifier">Env</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">></span><span class="special">::</span><span class="identifier">type</span><span class="special">)</span><span class="special">></span> + <span class="keyword">operator</span><span class="special">,</span><span class="special">(</span><span class="identifier">Env</span> <span class="keyword">const</span> <span class="special">&</span> other<span class="special">,</span> <a class="link" href="env.html" title="Struct template env">proto::env</a><span class="special"><</span><span class="identifier">Key</span><span class="special">,</span> <span class="identifier">Value</span><span class="special">></span> <span class="keyword">const</span> <span class="special">&</span> head<span class="special">)</span><span class="special">;</span></pre></div> +<div class="refsect1"> +<a name="idm45555172588032"></a><h2>Description</h2> +<p> + The effect of this function is to take two transform environments and compose them into + a larger environment that contains the key/values pairs of the two. The first argument + is allowed to not be a transform environment, in which case it is turned into one with + the <code class="computeroutput"><a class="link" href="as_env_idm45506990359280.html" title="Function as_env">proto::as_env()</a></code> function before composition with the + second argument. The second argument is required to be a transform environment with exactly + one key/value pair. + </p> +<p> + <span class="bold"><strong>Example:</strong></span> + </p> +<p> + Given user-defined keys <code class="computeroutput">key0</code> and <code class="computeroutput">key1</code> of types <code class="computeroutput">key0_type</code> + and <code class="computeroutput">key1_type</code>, the following code demonstrates how the chained use of <code class="computeroutput">operator,</code> + can build a composite transform environment containing a number of key/value pairs: + </p> +<pre class="programlisting"><code class="computeroutput"><a class="link" href="env.html" title="Struct template env">proto::env</a></code>< + key1_type + , int + , <code class="computeroutput"><a class="link" href="env.html" title="Struct template env">proto::env</a></code>< + key0_type + , char const (&)[6] + , <code class="computeroutput"><a class="link" href="env.html" title="Struct template env">proto::env</a></code><<code class="computeroutput"><a class="link" href="data_type.html" title="Struct data_type">proto::data_type</a></code>, int> + > +> myenv = (<code class="computeroutput"><a class="link" href="data.html" title="Global data">proto::data</a></code> = 1, key0 = "hello", key1 = 42); +// NOTE: operator, here --^ and here --^ + +// Check the results: +assert(1 == myenv[proto::data]); +assert(0 == std::strcmp(myenv[key0], "hello")); +assert(42 == myenv[key1]);</pre> +<p> + </p> +<p> + <span class="bold"><strong>Note:</strong></span> In the return type and the "Returns" clause, <code class="computeroutput"><em class="replaceable"><code>UNCVREF</code></em>(X)</code> is + the type <code class="computeroutput">X</code> stripped of top-level reference and cv-qualifiers. + </p> +<p> + <span class="bold"><strong>Note:</strong></span> In the "Returns" clause, <code class="computeroutput"><em class="replaceable"><code>cv</code></em></code> is replaced with <code class="computeroutput">const</code> + for the second overload, and nothing for the first. + </p> +<p> + <span class="bold"><strong>See also:</strong></span> + </p> +<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><code class="computeroutput"><a class="link" href="env.html#idm45506990490160-bb">proto::env::operator[]</a></code></li></ul></div> +<p> + </p> +<div class="variablelist"><table border="0" class="variablelist compact"> +<colgroup> +<col align="left" valign="top"> +<col> +</colgroup> +<tbody><tr> +<td><p><span class="term">Returns:</span></p></td> +<td><code class="computeroutput"><a class="link" href="env.html" title="Struct template env">proto::env</a><Key, Value, <em class="replaceable"><code>UNCVREF</code></em>(typename <a class="link" href="result_of/as_env.html" title="Struct template as_env">proto::result_of::as_env</a><Env <em class="replaceable"><code>cv</code></em> &>::type)>(head[Key()], <a class="link" href="as_env_idm45506990359280.html" title="Function as_env">proto::as_env</a>(other))</code></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 © 2008 Eric Niebler<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> +</div></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="env_var_idm45506984357536.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.transform.env_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="_env_var.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +</body> +</html> |