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diff --git a/doc/html/boost/proto/deduce_domain.html b/doc/html/boost/proto/deduce_domain.html new file mode 100755 index 0000000000..72c32a4973 --- /dev/null +++ b/doc/html/boost/proto/deduce_domain.html @@ -0,0 +1,121 @@ +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> +<title>Struct deduce_domain</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="../../proto/reference.html#header.boost.proto.domain_hpp" title="Header <boost/proto/domain.hpp>"> +<link rel="prev" href="basic_default_domain.html" title="Struct basic_default_domain"> +<link rel="next" href="is_domain.html" title="Struct template is_domain"> +</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="basic_default_domain.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.domain_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="is_domain.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +<div class="refentry"> +<a name="boost.proto.deduce_domain"></a><div class="titlepage"></div> +<div class="refnamediv"> +<h2><span class="refentrytitle">Struct deduce_domain</span></h2> +<p>boost::proto::deduce_domain — A pseudo-domain for use in functions and metafunctions that require a domain parameter. + It indicates that the domain of the parent node should be inferred from the domains of the child nodes.</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.domain_hpp" title="Header <boost/proto/domain.hpp>">boost/proto/domain.hpp</a>> + +</span> +<span class="keyword">struct</span> <a class="link" href="deduce_domain.html" title="Struct deduce_domain">deduce_domain</a> <span class="special">{</span> +<span class="special">}</span><span class="special">;</span></pre></div> +<div class="refsect1"> +<a name="id2715593"></a><h2>Description</h2> +<p> + When <code class="computeroutput">proto::deduce_domain</code> is used as a domain — either + explicitly or implicitly by + <code class="computeroutput"><a class="link" href="make_expr_id1503817.html" title="Function make_expr">proto::make_expr</a>()</code>, + <code class="computeroutput"><a class="link" href="unpack_expr_id1504094.html" title="Function unpack_expr">proto::unpack_expr</a>()</code>, + or Proto's operator overloads — Proto will use the domains of the child expressions to + compute the domain of the parent. It is done in such a way that (A) expressions in domains + that share a common super-domain are interoperable, and (B) expressions that are in + the default domain (or a sub-domain thereof) are interoperable with <span class="emphasis"><em>all</em></span> + expressions. The rules are as follows: + </p> +<div class="itemizedlist"><ul class="itemizedlist" type="disc"> +<li class="listitem"> + A sub-domain is <span class="emphasis"><em>stronger</em></span> than its super-domain. + </li> +<li class="listitem"> +<code class="computeroutput"><a class="link" href="default_domain.html" title="Struct default_domain">proto::default_domain</a></code>, + <code class="computeroutput"><a class="link" href="basic_default_domain.html" title="Struct basic_default_domain">proto::basic_default_domain</a></code> + and all their sub-domains are <span class="emphasis"><em>weaker</em></span> than all other domains. + </li> +<li class="listitem"> +<code class="computeroutput"><a class="link" href="basic_default_domain.html" title="Struct basic_default_domain">proto::basic_default_domain</a></code> + is weaker than + <code class="computeroutput"><a class="link" href="default_domain.html" title="Struct default_domain">proto::default_domain</a></code>. + </li> +<li class="listitem"> + For each child, define a set of domains <span class="emphasis"><em>S<sub>N</sub></em></span> + that includes the child's domain and all its super-domains. + </li> +<li class="listitem"> + Define a set <span class="emphasis"><em>I<sub>S</sub></em></span> that is the intersection of + all the individual sets <span class="emphasis"><em>S<sub>N</sub></em></span> that don't contain + <code class="computeroutput"><a class="link" href="default_domain.html" title="Struct default_domain">proto::default_domain</a></code> or + <code class="computeroutput"><a class="link" href="basic_default_domain.html" title="Struct basic_default_domain">proto::basic_default_domain</a></code>. + </li> +<li class="listitem"> + Define a set <span class="emphasis"><em>I<sub>W</sub></em></span> that is the intersection of + all the individual sets <span class="emphasis"><em>S<sub>N</sub></em></span> that contain + <code class="computeroutput"><a class="link" href="default_domain.html" title="Struct default_domain">proto::default_domain</a></code> or + <code class="computeroutput"><a class="link" href="basic_default_domain.html" title="Struct basic_default_domain">proto::basic_default_domain</a></code>. + </li> +<li class="listitem"> + Define a set <span class="emphasis"><em>P</em></span> that is the union of + <span class="emphasis"><em>I<sub>S</sub></em></span> and + <span class="emphasis"><em>I<sub>W</sub></em></span>. + </li> +<li class="listitem"> + The common domain is the strongest domain in set <span class="emphasis"><em>P</em></span>, with the + following caveats. + </li> +<li class="listitem"> + Let <span class="emphasis"><em>U</em></span> be the union of all sets + <span class="emphasis"><em>S<sub>N</sub></em></span>. If the result is + <code class="computeroutput"><a class="link" href="default_domain.html" title="Struct default_domain">proto::default_domain</a></code> or + <code class="computeroutput"><a class="link" href="basic_default_domain.html" title="Struct basic_default_domain">proto::basic_default_domain</a></code> + and <span class="emphasis"><em>U</em></span> contains an element that is <span class="emphasis"><em>not </em></span><code class="computeroutput"><a class="link" href="default_domain.html" title="Struct default_domain">proto::default_domain</a></code> or + <code class="computeroutput"><a class="link" href="basic_default_domain.html" title="Struct basic_default_domain">proto::basic_default_domain</a></code>, + it is an error. + </li> +</ul></div> +<p> + </p> +<p> + Note: the above description sounds like it would be expensive to compute at compile time. + In fact, it can all be done using C++ function overloading. + </p> +</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="basic_default_domain.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.domain_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="is_domain.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +</body> +</html> |