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1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> 4<title>Supported operators</title> 5<link rel="stylesheet" href="../../../boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.76.1"> 7<link rel="home" href="../../../index.html" title="Chapter 1. Phoenix 3.0"> 8<link rel="up" href="../operator.html" title="Operator"> 9<link rel="prev" href="../operator.html" title="Operator"> 10</head> 11<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 12<table cellpadding="2" width="100%"><tr><td valign="top"></td></tr></table> 13<hr> 14<div class="spirit-nav"> 15<a accesskey="p" href="../operator.html"><img src="../../../images/prev.png" alt="Prev"></a><a accesskey="u" href="../operator.html"><img src="../../../images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../images/home.png" alt="Home"></a> 16</div> 17<div class="section"> 18<div class="titlepage"><div><div><h4 class="title"> 19<a name="phoenix.modules.operator.supported_operators"></a><a class="link" href="supported_operators.html" title="Supported operators">Supported 20 operators</a> 21</h4></div></div></div> 22<a name="phoenix.modules.operator.supported_operators.unary_operators"></a><h6> 23<a name="id856596"></a> 24 <a class="link" href="supported_operators.html#phoenix.modules.operator.supported_operators.unary_operators">Unary 25 operators</a> 26 </h6> 27<pre class="programlisting"><span class="identifier">prefix</span><span class="special">:</span> <span class="special">~,</span> <span class="special">!,</span> <span class="special">-,</span> <span class="special">+,</span> <span class="special">++,</span> <span class="special">--,</span> <span class="special">&</span> <span class="special">(</span><span class="identifier">reference</span><span class="special">),</span> <span class="special">*</span> <span class="special">(</span><span class="identifier">dereference</span><span class="special">)</span> 28<span class="identifier">postfix</span><span class="special">:</span> <span class="special">++,</span> <span class="special">--</span> 29</pre> 30<a name="phoenix.modules.operator.supported_operators.binary_operators"></a><h6> 31<a name="id856727"></a> 32 <a class="link" href="supported_operators.html#phoenix.modules.operator.supported_operators.binary_operators">Binary 33 operators</a> 34 </h6> 35<pre class="programlisting"><span class="special">=,</span> <span class="special">[],</span> <span class="special">+=,</span> <span class="special">-=,</span> <span class="special">*=,</span> <span class="special">/=,</span> <span class="special">%=,</span> <span class="special">&=,</span> <span class="special">|=,</span> <span class="special">^=,</span> <span class="special"><<=,</span> <span class="special">>>=</span> 36<span class="special">+,</span> <span class="special">-,</span> <span class="special">*,</span> <span class="special">/,</span> <span class="special">%,</span> <span class="special">&,</span> <span class="special">|,</span> <span class="special">^,</span> <span class="special"><<,</span> <span class="special">>></span> 37<span class="special">==,</span> <span class="special">!=,</span> <span class="special"><,</span> <span class="special">>,</span> <span class="special"><=,</span> <span class="special">>=</span> 38<span class="special">&&,</span> <span class="special">||,</span> <span class="special">->*</span> 39</pre> 40<a name="phoenix.modules.operator.supported_operators.ternary_operator"></a><h6> 41<a name="id856928"></a> 42 <a class="link" href="supported_operators.html#phoenix.modules.operator.supported_operators.ternary_operator">Ternary 43 operator</a> 44 </h6> 45<pre class="programlisting"><span class="identifier">if_else</span><span class="special">(</span><span class="identifier">c</span><span class="special">,</span> <span class="identifier">a</span><span class="special">,</span> <span class="identifier">b</span><span class="special">)</span> 46</pre> 47<p> 48 The ternary operator deserves special mention. Since C++ does not allow 49 us to overload the conditional expression: <code class="computeroutput"><span class="identifier">c</span> 50 <span class="special">?</span> <span class="identifier">a</span> 51 <span class="special">:</span> <span class="identifier">b</span></code>, 52 the if_else pseudo function is provided for this purpose. The behavior 53 is identical, albeit in a lazy manner. 54 </p> 55<a name="phoenix.modules.operator.supported_operators.member_pointer_operator"></a><h6> 56<a name="id857031"></a> 57 <a class="link" href="supported_operators.html#phoenix.modules.operator.supported_operators.member_pointer_operator">Member 58 pointer operator</a> 59 </h6> 60<pre class="programlisting"><span class="identifier">a</span><span class="special">->*</span><span class="identifier">member_object_pointer</span> 61<span class="identifier">a</span><span class="special">->*</span><span class="identifier">member_function_pointer</span> 62</pre> 63<p> 64 The left hand side of the member pointer operator must be an actor returning 65 a pointer type. The right hand side of the member pointer operator may 66 be either a pointer to member object or pointer to member function. 67 </p> 68<p> 69 If the right hand side is a member object pointer, the result is an actor 70 which, when evaluated, returns a reference to that member. For example: 71 </p> 72<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> 73<span class="special">{</span> 74 <span class="keyword">int</span> <span class="identifier">member</span><span class="special">;</span> 75<span class="special">};</span> 76 77<span class="identifier">A</span><span class="special">*</span> <span class="identifier">a</span> <span class="special">=</span> <span class="keyword">new</span> <span class="identifier">A</span><span class="special">;</span> 78<span class="special">...</span> 79 80<span class="special">(</span><span class="identifier">arg1</span><span class="special">->*&</span><span class="identifier">A</span><span class="special">::</span><span class="identifier">member</span><span class="special">)(</span><span class="identifier">a</span><span class="special">);</span> <span class="comment">// returns member a->member 81</span></pre> 82<p> 83 If the right hand side is a member function pointer, the result is an actor 84 which, when invoked, calls the specified member function. For example: 85 </p> 86<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span> 87<span class="special">{</span> 88 <span class="keyword">int</span> <span class="identifier">func</span><span class="special">(</span><span class="keyword">int</span><span class="special">);</span> 89<span class="special">};</span> 90 91<span class="identifier">A</span><span class="special">*</span> <span class="identifier">a</span> <span class="special">=</span> <span class="keyword">new</span> <span class="identifier">A</span><span class="special">;</span> 92<span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> 93 94<span class="special">(</span><span class="identifier">arg1</span><span class="special">->*&</span><span class="identifier">A</span><span class="special">::</span><span class="identifier">func</span><span class="special">)(</span><span class="identifier">arg2</span><span class="special">)(</span><span class="identifier">a</span><span class="special">,</span> <span class="identifier">i</span><span class="special">);</span> <span class="comment">// returns a->func(i) 95</span></pre> 96</div> 97<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 98<td align="left"></td> 99<td align="right"><div class="copyright-footer">Copyright © 2002-2005, 2010 Joel de Guzman, Dan Marsden, Thomas Heller<p> 100 Distributed under the Boost Software License, Version 1.0. (See accompanying 101 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>) 102 </p> 103</div></td> 104</tr></table> 105<hr> 106<div class="spirit-nav"> 107<a accesskey="p" href="../operator.html"><img src="../../../images/prev.png" alt="Prev"></a><a accesskey="u" href="../operator.html"><img src="../../../images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../images/home.png" alt="Home"></a> 108</div> 109</body> 110</html>