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  28. <h2><span class="refentrytitle">Macro BOOST_CONTRACT_STATIC_PUBLIC_FUNCTION</span></h2>
    29. 

  29. <p>BOOST_CONTRACT_STATIC_PUBLIC_FUNCTION &#8212; Program contracts that can be completely disabled at compile-time for static public functions. </p>
    30. 

  30. </div>
    31. 

  31. <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
    32. 

  32. <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="reference.html#header.boost.contract_macro_hpp" title="Header &lt;boost/contract_macro.hpp&gt;">boost/contract_macro.hpp</a>&gt;
    33. 

  33. 

  34. </span>BOOST_CONTRACT_STATIC_PUBLIC_FUNCTION(...)</pre></div>
    35. 

  35. <div class="refsect1">
    36. 

  36. <a name="idm45707992230320"></a><h2>Description</h2>
    37. 

  37. <p>This is used together with <code class="computeroutput"><a class="link" href="BOOST_CO_idm45394998748208.html" title="Macro BOOST_CONTRACT_PRECONDITION">BOOST_CONTRACT_PRECONDITION</a></code>,  <code class="computeroutput"><a class="link" href="BOOST_CO_idm45394998736528.html" title="Macro BOOST_CONTRACT_POSTCONDITION">BOOST_CONTRACT_POSTCONDITION</a></code>, <code class="computeroutput"><a class="link" href="BOOST_CONTRACT_EXCEPT.html" title="Macro BOOST_CONTRACT_EXCEPT">BOOST_CONTRACT_EXCEPT</a></code>, and <code class="computeroutput"><a class="link" href="BOOST_CONTRACT_OLD.html" title="Macro BOOST_CONTRACT_OLD">BOOST_CONTRACT_OLD</a></code> to specify preconditions, postconditions, exception guarantees, and old value copies at body that can be completely disabled at compile-time for static public functions:</p>
    38. 

  38. <pre class="programlisting"><span class="keyword">class</span> <span class="identifier">u</span> <span class="special">{</span>
    39. 

  39.     <span class="keyword">friend</span> <span class="keyword">class</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">contract</span><span class="special">::</span><span class="identifier">access</span><span class="special">;</span>
    40. 

  40. 

  41.     <span class="identifier">BOOST_CONTRACT_STATIC_INVARIANT</span><span class="special">(</span><span class="special">{</span> <span class="comment">// Optional (as for non-static).</span>
    42. 

  42.         <span class="identifier">BOOST_CONTRACT_ASSERT</span><span class="special">(</span><span class="special">...</span><span class="special">)</span><span class="special">;</span>
    43. 

  43.         <span class="special">...</span>
    44. 

  44.     <span class="special">}</span><span class="special">)</span>
    45. 

  45. 

  46. <span class="keyword">public</span><span class="special">:</span>
    47. 

  47.     <span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="special">...</span><span class="special">)</span> <span class="special">{</span>
    48. 

  48.         <span class="identifier">BOOST_CONTRACT_OLD_PTR</span><span class="special">(</span><span class="identifier">old_type</span><span class="special">)</span><span class="special">(</span><span class="identifier">old_var</span><span class="special">)</span><span class="special">;</span>
    49. 

  49.         <span class="identifier">BOOST_CONTRACT_PUBLIC_FUNCTION</span><span class="special">(</span><span class="identifier">u</span><span class="special">)</span>
    50. 

  50.             <span class="identifier">BOOST_CONTRACT_PRECONDITION</span><span class="special">(</span><span class="special">[</span><span class="special">&amp;</span><span class="special">]</span> <span class="special">{</span> <span class="comment">// Optional.</span>
    51. 

  51.                 <span class="identifier">BOOST_CONTRACT_ASSERT</span><span class="special">(</span><span class="special">...</span><span class="special">)</span><span class="special">;</span>
    52. 

  52.                 <span class="special">...</span>
    53. 

  53.             <span class="special">}</span><span class="special">)</span>
    54. 

  54.             <span class="identifier">BOOST_CONTRACT_OLD</span><span class="special">(</span><span class="special">[</span><span class="special">&amp;</span><span class="special">]</span> <span class="special">{</span> <span class="comment">// Optional.</span>
    55. 

  55.                 <span class="identifier">old_var</span> <span class="special">=</span> <span class="identifier">BOOST_CONTRACT_OLDOF</span><span class="special">(</span><span class="identifier">old_expr</span><span class="special">)</span><span class="special">;</span>
    56. 

  56.                 <span class="special">...</span>
    57. 

  57.             <span class="special">}</span><span class="special">)</span>
    58. 

  58.             <span class="identifier">BOOST_CONTRACT_POSTCONDITION</span><span class="special">(</span><span class="special">[</span><span class="special">&amp;</span><span class="special">]</span> <span class="special">{</span> <span class="comment">// Optional.</span>
    59. 

  59.                 <span class="identifier">BOOST_CONTRACT_ASSERT</span><span class="special">(</span><span class="special">...</span><span class="special">)</span><span class="special">;</span>
    60. 

  60.                 <span class="special">...</span>
    61. 

  61.             <span class="special">}</span><span class="special">)</span>
    62. 

  62.             <span class="identifier">BOOST_CONTRACT_EXCEPT</span><span class="special">(</span><span class="special">[</span><span class="special">&amp;</span><span class="special">]</span> <span class="special">{</span> <span class="comment">// Optional.</span>
    63. 

  63.                 <span class="identifier">BOOST_CONTRACT_ASSERT</span><span class="special">(</span><span class="special">...</span><span class="special">)</span><span class="special">;</span>
    64. 

  64.                 <span class="special">...</span>
    65. 

  65.             <span class="special">}</span><span class="special">)</span>
    66. 

  66.         <span class="special">;</span> <span class="comment">// Trailing `;` is required.</span>
    67. 

  67. 

  68.         <span class="special">...</span> <span class="comment">// Function body.</span>
    69. 

  69.     <span class="special">}</span>
    70. 

  70.     
    71. 

  71.     <span class="special">...</span>
    72. 

  72. <span class="special">}</span><span class="special">;</span>
    73. 

  73. </pre>
    74. 

  74. <p>For optimization, this can be omitted for static public functions that do not have preconditions, postconditions and exception guarantees, within classes that have no static invariants.</p>
    75. 

  75. <p><code class="computeroutput">BOOST_CONTRACT_STATIC_PUBLIC_FUNCTION(class_type)</code> expands to code equivalent to the following (note that no code is generated when  <code class="computeroutput"><a class="link" href="BOOST_CO_idm45394999586272.html" title="Macro BOOST_CONTRACT_NO_PUBLIC_FUNCTIONS">BOOST_CONTRACT_NO_PUBLIC_FUNCTIONS</a></code> is defined):</p>
    76. 

  76. <pre class="programlisting"><span class="preprocessor">#ifndef</span> <span class="identifier">BOOST_CONTRACT_NO_PUBLIC_FUNCTIONS</span>
    77. 

  77.     <span class="identifier">boost</span><span class="special">::</span><span class="identifier">contract</span><span class="special">::</span><span class="identifier">check</span> <span class="identifier">internal_var</span> <span class="special">=</span>
    78. 

  78.             <span class="identifier">boost</span><span class="special">::</span><span class="identifier">contract</span><span class="special">::</span><span class="identifier">public_function</span><span class="special">&lt;</span><span class="identifier">class_type</span><span class="special">&gt;</span><span class="special">(</span><span class="special">)</span>
    79. 

  79. <span class="preprocessor">#endif</span>
    80. 

  80. </pre>
    81. 

  81. <p>Where:</p>
    82. 

  82. <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
    83. 

  83. <li class="listitem"><p><code class="computeroutput"><span class="bold"><strong>class_type</strong></span></code> is the type of the class containing the static public function declaring the contract. (This is a variadic macro parameter so it can contain commas not protected by round parenthesis.) </p></li>
    84. 

  84. <li class="listitem"><p><code class="computeroutput"><span class="bold"><strong>internal_var</strong></span></code> is a variable name internally generated by this library (this name is unique but only on different line numbers so this macro cannot be expanded multiple times on the same line).</p></li>
    85. 

  85. </ul></div>
    86. 

  86. <p>
    87. 

  87. </p>
    88. 

  88. <p><span class="bold"><strong>See Also:</strong></span></p>
    89. 

  89. <p> <a class="link" href="boost_contract/extras.html#boost_contract.extras.disable_contract_compilation__macro_interface_" title="Disable Contract Compilation (Macro Interface)">
    90. 

  90.         Disable Contract Compilation</a>,  <a class="link" href="boost_contract/tutorial.html#boost_contract.tutorial.static_public_functions" title="Static Public Functions"> Static Public Functions</a> </p>
    91. 

  91. <p>
    92. 

  92. </p>
    93. 

  93. <p>
    94. 

  94. </p>
    95. 

  95. </div>
    96. 

  96. </div>
    97. 

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    98. 

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

  99. <td align="right"><div class="copyright-footer">Copyright &#169; 2008-2019 Lorenzo Caminiti<p>
    100. 

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

  101.         file LICENSE_1_0.txt or a 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>
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