| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Struct template extends</title> |
| <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> |
| <link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> |
| <link rel="up" href="../../proto/reference.html#header.boost.proto.extends_hpp" title="Header <boost/proto/extends.hpp>"> |
| <link rel="prev" href="is_proto_expr.html" title="Struct is_proto_expr"> |
| <link rel="next" href="extends/result.html" title="Struct template result"> |
| </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="is_proto_expr.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.extends_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="extends/result.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| <div class="refentry"> |
| <a name="boost.proto.extends"></a><div class="titlepage"></div> |
| <div class="refnamediv"> |
| <h2><span class="refentrytitle">Struct template extends</span></h2> |
| <p>boost::proto::extends — For adding behaviors to a Proto expression template.</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.extends_hpp" title="Header <boost/proto/extends.hpp>">boost/proto/extends.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <a class="link" href="../../Expr.html" title="Concept Expr">Expr</a><span class="special">,</span> <span class="keyword">typename</span> Derived<span class="special">,</span> |
| <span class="keyword">typename</span> <a class="link" href="../../Domain.html" title="Concept Domain">Domain</a> <span class="special">=</span> <a class="link" href="default_domain.html" title="Struct default_domain">proto::default_domain</a><span class="special">></span> |
| <span class="keyword">struct</span> <a class="link" href="extends.html" title="Struct template extends">extends</a> <span class="special">{</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">Expr</span><span class="special">::</span><span class="identifier">proto_base_expr</span> <a name="boost.proto.extends.proto_base_expr"></a><span class="identifier">proto_base_expr</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">Domain</span> <a name="boost.proto.extends.proto_domain"></a><span class="identifier">proto_domain</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">Derived</span> <a name="boost.proto.extends.proto_derived_expr"></a><span class="identifier">proto_derived_expr</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">proto_base_expr</span><span class="special">::</span><span class="identifier">proto_tag</span> <a name="boost.proto.extends.proto_tag"></a><span class="identifier">proto_tag</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">proto_base_expr</span><span class="special">::</span><span class="identifier">proto_args</span> <a name="boost.proto.extends.proto_args"></a><span class="identifier">proto_args</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">proto_base_expr</span><span class="special">::</span><span class="identifier">proto_arity</span> <a name="boost.proto.extends.proto_arity"></a><span class="identifier">proto_arity</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">proto_base_expr</span><span class="special">::</span><span class="identifier">proto_grammar</span> <a name="boost.proto.extends.proto_grammar"></a><span class="identifier">proto_grammar</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">proto_base_expr</span><span class="special">::</span><span class="identifier">proto_child</span><em class="replaceable"><code><span class="identifier">N</span></code></em> <a name="boost.proto.extends.proto_childN"></a><span class="identifier">proto_childN</span><span class="special">;</span> <span class="comment">// For each <em class="replaceable"><code>N</code></em> in <em class="replaceable"><code>[0,max(1,proto_arity_c))</code></em></span> |
| |
| <span class="comment">// member classes/structs/unions</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Signature<span class="special">></span> |
| <span class="keyword">struct</span> <a class="link" href="extends/result.html" title="Struct template result">result</a> <span class="special">{</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends/result.html#boost.proto.extends.result.type"><span class="identifier">type</span></a><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="extends.html#boost.proto.extendsconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <a class="link" href="extends.html#id1261172-bb"><span class="identifier">extends</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="extends.html#id1261174-bb"><span class="identifier">extends</span></a><span class="special">(</span><a class="link" href="extends.html" title="Struct template extends">extends</a> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="extends.html#id1261190-bb"><span class="identifier">extends</span></a><span class="special">(</span><span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="extends.html#id1261203-bb">public static functions</a></span> |
| <span class="keyword">static</span> <span class="identifier">Derived</span> <span class="keyword">const</span> <a class="link" href="extends.html#id1261208-bb"><span class="identifier">make</span></a><span class="special">(</span><span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="extends.html#id1261243-bb">public member functions</a></span> |
| <span class="identifier">proto_base_expr</span> <span class="special">&</span> <a class="link" href="extends.html#id1261250-bb"><span class="identifier">proto_base</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">proto_base_expr</span> <span class="keyword">const</span> <span class="special">&</span> <a class="link" href="extends.html#id1261270-bb"><span class="identifier">proto_base</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261294-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="identifier">A</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261339-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261378-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="identifier">A</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261419-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261463-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">A</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261507-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261546-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">A</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261587-bb"><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span></a><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span><span class="special">...</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261631-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">...</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span><span class="special">...</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a class="link" href="extends.html#id1261680-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">...</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="identifier">Expr</span> proto_expr_<span class="special">;</span> <span class="comment">// For exposition only.</span> |
| <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">long</span> proto_arity_c<span class="special">;</span> <span class="comment">// <code class="computeroutput">= proto_base_expr::proto_arity_c;</code></span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id2285766"></a><h2>Description</h2> |
| <p> |
| Use <code class="computeroutput">proto::extends<></code> to give expressions in your |
| domain custom data members and member functions. |
| </p> |
| <p> |
| Conceptually, using <code class="computeroutput">proto::extends<></code> is akin |
| to inheriting from <code class="computeroutput"><a class="link" href="expr.html" title="Struct template expr">proto::expr</a><></code> |
| and adding your own members. Using <code class="computeroutput">proto::extends<></code> is |
| generally preferrable to straight inheritance because the members that would be inherited from |
| <code class="computeroutput"><a class="link" href="expr.html" title="Struct template expr">proto::expr</a><></code> would |
| be wrong; they would incorrectly slice off your additional members when building |
| larger expressions from smaller ones. <code class="computeroutput">proto::extends<></code> |
| automatically gives your expression types the appropriate operator overloads that |
| preserve your domain-specific members when composing expression trees. |
| </p> |
| <p> |
| Expression extensions are typically defined as follows: |
| </p> |
| <p> |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">Expr</span> <span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">my_expr</span> |
| <span class="special">:</span> <span class="identifier">proto</span><span class="special">::</span><span class="identifier">extends</span><span class="special"><</span> |
| <span class="identifier">Expr</span> <span class="comment">// The expression type we're extending</span> |
| <span class="special">,</span> <span class="identifier">my_expr</span><span class="special"><</span> <span class="identifier">Expr</span> <span class="special">></span> <span class="comment">// The type we're defining</span> |
| <span class="special">,</span> <span class="identifier">my_domain</span> <span class="comment">// The domain associated with this expression extension</span> |
| <span class="special">></span> |
| <span class="special">{</span> |
| <span class="keyword">typedef</span> <span class="identifier">proto</span><span class="special">::</span><span class="identifier">extends</span><span class="special"><</span> <span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">my_expr</span><span class="special"><</span> <span class="identifier">Expr</span> <span class="special">></span><span class="special">,</span> <span class="identifier">my_domain</span> <span class="special">></span> <span class="identifier">base_type</span><span class="special">;</span> |
| |
| <span class="comment">// An expression extension is constructed from the expression</span> |
| <span class="comment">// it is extending.</span> |
| <span class="identifier">my_expr</span><span class="special">(</span> <span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">e</span> <span class="special">=</span> <span class="identifier">Expr</span><span class="special">(</span><span class="special">)</span> <span class="special">)</span> |
| <span class="special">:</span> <span class="identifier">base_type</span><span class="special">(</span> <span class="identifier">e</span> <span class="special">)</span> |
| <span class="special">{</span><span class="special">}</span> |
| |
| <span class="comment">// Unhide proto::extends::operator=</span> |
| <span class="comment">// (This is only necessary if a lazy assignment operator</span> |
| <span class="comment">// makes sense for your domain-specific language.)</span> |
| <span class="identifier">BOOST_PROTO_EXTENDS_USING_ASSIGN</span><span class="special">(</span><span class="identifier">my_expr</span><span class="special">)</span> |
| |
| <span class="comment">/* |
| ... domain-specific members go here ... |
| */</span> |
| <span class="special">}</span><span class="special">;</span></pre> |
| <p> |
| </p> |
| <p> |
| See also: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"><code class="computeroutput"><a class="link" href="../../BOOST_PROTO_EXTENDS.html" title="Macro BOOST_PROTO_EXTENDS">BOOST_PROTO_EXTENDS</a>()</code></li> |
| <li class="listitem"><code class="computeroutput"><a class="link" href="../../BOOST_PROTO_EXTENDS_USING_ASSIGN.html" title="Macro BOOST_PROTO_EXTENDS_USING_ASSIGN">BOOST_PROTO_EXTENDS_USING_ASSIGN</a>()</code></li> |
| <li class="listitem"><code class="computeroutput"><a class="link" href="../../BOOST_PROTO_EXTENDS_USING_ASSIGN_NON_DEPENDENT.html" title="Macro BOOST_PROTO_EXTENDS_USING_ASSIGN_NON_DEPENDENT">BOOST_PROTO_EXTENDS_USING_ASSIGN_NON_DEPENDENT</a>()</code></li> |
| </ul></div> |
| <p> |
| </p> |
| <div class="refsect2"> |
| <a name="id2286276"></a><h3> |
| <a name="boost.proto.extendsconstruct-copy-destruct"></a><code class="computeroutput">extends</code> |
| public |
| construct/copy/destruct</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"><pre class="literallayout"><a name="id1261172-bb"></a><span class="identifier">extends</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"><pre class="literallayout"><a name="id1261174-bb"></a><span class="identifier">extends</span><span class="special">(</span><a class="link" href="extends.html" title="Struct template extends">extends</a> <span class="keyword">const</span> <span class="special">&</span> that<span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"><pre class="literallayout"><a name="id1261190-bb"></a><span class="identifier">extends</span><span class="special">(</span><span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">&</span> expr_<span class="special">)</span><span class="special">;</span></pre></li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="id2286417"></a><h3> |
| <a name="id1261203-bb"></a><code class="computeroutput">extends</code> public static functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> |
| <pre class="literallayout"><span class="keyword">static</span> <span class="identifier">Derived</span> <span class="keyword">const</span> <a name="id1261208-bb"></a><span class="identifier">make</span><span class="special">(</span><span class="identifier">Expr</span> <span class="keyword">const</span> <span class="special">&</span> expr<span class="special">)</span><span class="special">;</span></pre> |
| <p>Construct an expression extension from the base expression.</p> |
| </li></ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="id2286501"></a><h3> |
| <a name="id1261243-bb"></a><code class="computeroutput">extends</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">proto_base_expr</span> <span class="special">&</span> <a name="id1261250-bb"></a><span class="identifier">proto_base</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><code class="computeroutput">proto_expr_.proto_base()</code></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Throws:</span></p></td> |
| <td>Will not throw.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">proto_base_expr</span> <span class="keyword">const</span> <span class="special">&</span> <a name="id1261270-bb"></a><span class="identifier">proto_base</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><code class="computeroutput">proto_expr_.proto_base()</code></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Throws:</span></p></td> |
| <td>Will not throw.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261294-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="identifier">A</span> <span class="special">&</span> a<span class="special">)</span><span class="special">;</span></pre> |
| <p>Lazy assignment expression</p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>A new expression node representing the assignment operation.</p></td> |
| </tr></tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261339-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span> a<span class="special">)</span><span class="special">;</span></pre> |
| <p> |
| This is an overloaded member function, provided for convenience. It differs from |
| the above function only in what argument(s) it accepts. |
| </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261378-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="identifier">A</span> <span class="special">&</span> a<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p> |
| This is an overloaded member function, provided for convenience. It differs from |
| the above function only in what argument(s) it accepts. |
| </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261419-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span> a<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p> |
| This is an overloaded member function, provided for convenience. It differs from |
| the above function only in what argument(s) it accepts. |
| </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261463-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">A</span> <span class="special">&</span> a<span class="special">)</span><span class="special">;</span></pre> |
| <p>Lazy subscript expression</p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>A new expression node representing the subscript operation.</p></td> |
| </tr></tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261507-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span> a<span class="special">)</span><span class="special">;</span></pre> |
| <p> |
| This is an overloaded member function, provided for convenience. It differs from |
| the above function only in what argument(s) it accepts. |
| </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261546-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">A</span> <span class="special">&</span> a<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p> |
| This is an overloaded member function, provided for convenience. It differs from |
| the above function only in what argument(s) it accepts. |
| </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261587-bb"></a><span class="keyword">operator</span><span class="special">[</span><span class="special">]</span><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span> a<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p> |
| This is an overloaded member function, provided for convenience. It differs from |
| the above function only in what argument(s) it accepts. |
| </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span><span class="special">...</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261631-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">...</span> a<span class="special">)</span><span class="special">;</span></pre> |
| <p>Lazy function call</p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>A new expression node representing the function call operation.</p></td> |
| </tr></tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span><span class="special">...</span> A<span class="special">></span> <em class="replaceable"><code><span class="identifier">unspecified</span></code></em> <a name="id1261680-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">A</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">...</span> a<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p> |
| This is an overloaded member function, provided for convenience. It differs from |
| the above function only in what argument(s) it accepts. |
| </p> |
| </li> |
| </ol></div> |
| </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="is_proto_expr.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.extends_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="extends/result.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |