/Src/Dependencies/Boost/libs/phoenix/doc/html/phoenix/modules/operator/supported_operators.html

http://hadesmem.googlecode.com/ · HTML · 110 lines · 106 code · 4 blank · 0 comment · 0 complexity · 9a381f4ea50f89205a73225a1d9580e6 MD5 · raw file 

    

  1. <html>
    2. 

  2. <head>
    3. 

  3. <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
    4. 

  4. <title>Supported operators</title>
    5. 

  5. <link rel="stylesheet" href="../../../boostbook.css" type="text/css">
    6. 

  6. <meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
    7. 

  7. <link rel="home" href="../../../index.html" title="Chapter&#160;1.&#160;Phoenix 3.0">
    8. 

  8. <link rel="up" href="../operator.html" title="Operator">
    9. 

  9. <link rel="prev" href="../operator.html" title="Operator">
    10. 

  10. </head>
    11. 

  11. <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
    12. 

  12. <table cellpadding="2" width="100%"><tr><td valign="top"></td></tr></table>
    13. 

  13. <hr>
    14. 

  14. <div class="spirit-nav">
    15. 

  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. 

  16. </div>
    17. 

  17. <div class="section">
    18. 

  18. <div class="titlepage"><div><div><h4 class="title">
    19. 

  19. <a name="phoenix.modules.operator.supported_operators"></a><a class="link" href="supported_operators.html" title="Supported operators">Supported
    20. 

  20.         operators</a>
    21. 

  21. </h4></div></div></div>
    22. 

  22. <a name="phoenix.modules.operator.supported_operators.unary_operators"></a><h6>
    23. 

  23. <a name="id856596"></a>
    24. 

  24.           <a class="link" href="supported_operators.html#phoenix.modules.operator.supported_operators.unary_operators">Unary
    25. 

  25.           operators</a>
    26. 

  26.         </h6>
    27. 

  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">&amp;</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. 

  28. <span class="identifier">postfix</span><span class="special">:</span>  <span class="special">++,</span> <span class="special">--</span>
    29. 

  29. </pre>
    30. 

  30. <a name="phoenix.modules.operator.supported_operators.binary_operators"></a><h6>
    31. 

  31. <a name="id856727"></a>
    32. 

  32.           <a class="link" href="supported_operators.html#phoenix.modules.operator.supported_operators.binary_operators">Binary
    33. 

  33.           operators</a>
    34. 

  34.         </h6>
    35. 

  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">&amp;=,</span> <span class="special">|=,</span> <span class="special">^=,</span> <span class="special">&lt;&lt;=,</span> <span class="special">&gt;&gt;=</span>
    36. 

  36. <span class="special">+,</span> <span class="special">-,</span> <span class="special">*,</span> <span class="special">/,</span> <span class="special">%,</span> <span class="special">&amp;,</span> <span class="special">|,</span> <span class="special">^,</span> <span class="special">&lt;&lt;,</span> <span class="special">&gt;&gt;</span>
    37. 

  37. <span class="special">==,</span> <span class="special">!=,</span> <span class="special">&lt;,</span> <span class="special">&gt;,</span> <span class="special">&lt;=,</span> <span class="special">&gt;=</span>
    38. 

  38. <span class="special">&amp;&amp;,</span> <span class="special">||,</span> <span class="special">-&gt;*</span>
    39. 

  39. </pre>
    40. 

  40. <a name="phoenix.modules.operator.supported_operators.ternary_operator"></a><h6>
    41. 

  41. <a name="id856928"></a>
    42. 

  42.           <a class="link" href="supported_operators.html#phoenix.modules.operator.supported_operators.ternary_operator">Ternary
    43. 

  43.           operator</a>
    44. 

  44.         </h6>
    45. 

  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. 

  46. </pre>
    47. 

  47. <p>
    48. 

  48.           The ternary operator deserves special mention. Since C++ does not allow
    49. 

  49.           us to overload the conditional expression: <code class="computeroutput"><span class="identifier">c</span>
    50. 

  50.           <span class="special">?</span> <span class="identifier">a</span>
    51. 

  51.           <span class="special">:</span> <span class="identifier">b</span></code>,
    52. 

  52.           the if_else pseudo function is provided for this purpose. The behavior
    53. 

  53.           is identical, albeit in a lazy manner.
    54. 

  54.         </p>
    55. 

  55. <a name="phoenix.modules.operator.supported_operators.member_pointer_operator"></a><h6>
    56. 

  56. <a name="id857031"></a>
    57. 

  57.           <a class="link" href="supported_operators.html#phoenix.modules.operator.supported_operators.member_pointer_operator">Member
    58. 

  58.           pointer operator</a>
    59. 

  59.         </h6>
    60. 

  60. <pre class="programlisting"><span class="identifier">a</span><span class="special">-&gt;*</span><span class="identifier">member_object_pointer</span>
    61. 

  61. <span class="identifier">a</span><span class="special">-&gt;*</span><span class="identifier">member_function_pointer</span>
    62. 

  62. </pre>
    63. 

  63. <p>
    64. 

  64.           The left hand side of the member pointer operator must be an actor returning
    65. 

  65.           a pointer type. The right hand side of the member pointer operator may
    66. 

  66.           be either a pointer to member object or pointer to member function.
    67. 

  67.         </p>
    68. 

  68. <p>
    69. 

  69.           If the right hand side is a member object pointer, the result is an actor
    70. 

  70.           which, when evaluated, returns a reference to that member. For example:
    71. 

  71.         </p>
    72. 

  72. <pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span>
    73. 

  73. <span class="special">{</span>
    74. 

  74.     <span class="keyword">int</span> <span class="identifier">member</span><span class="special">;</span>
    75. 

  75. <span class="special">};</span>
    76. 

  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. 

  78. <span class="special">...</span>
    79. 

  79. 

  80. <span class="special">(</span><span class="identifier">arg1</span><span class="special">-&gt;*&amp;</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-&gt;member
    81. 

  81. </span></pre>
    82. 

  82. <p>
    83. 

  83.           If the right hand side is a member function pointer, the result is an actor
    84. 

  84.           which, when invoked, calls the specified member function. For example:
    85. 

  85.         </p>
    86. 

  86. <pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">A</span>
    87. 

  87. <span class="special">{</span>
    88. 

  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. 

  89. <span class="special">};</span>
    90. 

  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. 

  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. 

  93. 

  94. <span class="special">(</span><span class="identifier">arg1</span><span class="special">-&gt;*&amp;</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-&gt;func(i)
    95. 

  95. </span></pre>
    96. 

  96. </div>
    97. 

  97. <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
    98. 

  98. <td align="left"></td>
    99. 

  99. <td align="right"><div class="copyright-footer">Copyright &#169; 2002-2005, 2010 Joel de Guzman, Dan Marsden, Thomas Heller<p>
    100. 

  100.         Distributed under the Boost Software License, Version 1.0. (See accompanying
    101. 

  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. 

  102.       </p>
    103. 

  103. </div></td>
    104. 

  104. </tr></table>
    105. 

  105. <hr>
    106. 

  106. <div class="spirit-nav">
    107. 

  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. 

  108. </div>
    109. 

  109. </body>
    110. 

  110. </html>
    111.