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  49.   <div class="section" id="indirect">
    50. 

  50. <h1>indirect<a class="headerlink" href="#indirect" title="Permalink to this headline">¶</a></h1>
    51. 

  51. <div class="section" id="header">
    52. 

  52. <h2>Header<a class="headerlink" href="#header" title="Permalink to this headline">¶</a></h2>
    53. 

  53. <div class="highlight-cpp"><div class="highlight"><pre><span class="cp">#include</span> <span class="cpf">&lt;boost/hof/indirect.hpp&gt;</span><span class="cp"></span>
    54. 

  54. </pre></div>
    55. 

  55. </div>
    56. 

  56. </div>
    57. 

  57. <div class="section" id="description">
    58. 

  58. <h2>Description<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
    59. 

  59. <p>The <code class="docutils literal"><span class="pre">indirect</span></code> function adaptor dereferences the object before calling it.</p>
    60. 

  60. </div>
    61. 

  61. <div class="section" id="synopsis">
    62. 

  62. <h2>Synopsis<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
    63. 

  63. <div class="highlight-cpp"><div class="highlight"><pre><span class="k">template</span><span class="o">&lt;</span><span class="k">class</span> <span class="nc">F</span><span class="o">&gt;</span>
    64. 

  64. <span class="k">constexpr</span> <span class="n">indirect_adaptor</span><span class="o">&lt;</span><span class="n">F</span><span class="o">&gt;</span> <span class="n">indirect</span><span class="p">(</span><span class="n">F</span> <span class="n">f</span><span class="p">);</span>
    65. 

  65. </pre></div>
    66. 

  66. </div>
    67. 

  67. </div>
    68. 

  68. <div class="section" id="semantics">
    69. 

  69. <h2>Semantics<a class="headerlink" href="#semantics" title="Permalink to this headline">¶</a></h2>
    70. 

  70. <div class="highlight-cpp"><div class="highlight"><pre><span class="n">assert</span><span class="p">(</span><span class="n">indirect</span><span class="p">(</span><span class="n">f</span><span class="p">)(</span><span class="n">xs</span><span class="p">...)</span> <span class="o">==</span> <span class="p">(</span><span class="o">*</span><span class="n">f</span><span class="p">)(</span><span class="n">xs</span><span class="p">...));</span>
    71. 

  71. </pre></div>
    72. 

  72. </div>
    73. 

  73. </div>
    74. 

  74. <div class="section" id="requirements">
    75. 

  75. <h2>Requirements<a class="headerlink" href="#requirements" title="Permalink to this headline">¶</a></h2>
    76. 

  76. <p>F must be:</p>
    77. 

  77. <ul class="simple">
    78. 

  78. <li>MoveConstructible</li>
    79. 

  79. <li>Dereferenceable</li>
    80. 

  80. </ul>
    81. 

  81. </div>
    82. 

  82. <div class="section" id="example">
    83. 

  83. <h2>Example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2>
    84. 

  84. <div class="highlight-cpp"><div class="highlight"><pre><span class="cp">#include</span> <span class="cpf">&lt;boost/hof.hpp&gt;</span><span class="cp"></span>
    85. 

  85. <span class="cp">#include</span> <span class="cpf">&lt;cassert&gt;</span><span class="cp"></span>
    86. 

  86. <span class="cp">#include</span> <span class="cpf">&lt;memory&gt;</span><span class="cp"></span>
    87. 

  87. <span class="k">using</span> <span class="k">namespace</span> <span class="n">boost</span><span class="o">::</span><span class="n">hof</span><span class="p">;</span>
    88. 

  88. 

  89. <span class="k">struct</span> <span class="n">sum</span>
    90. 

  90. <span class="p">{</span>
    91. 

  91.     <span class="k">template</span><span class="o">&lt;</span><span class="k">class</span> <span class="nc">T</span><span class="p">,</span> <span class="k">class</span> <span class="nc">U</span><span class="o">&gt;</span>
    92. 

  92.     <span class="n">T</span> <span class="k">operator</span><span class="p">()(</span><span class="n">T</span> <span class="n">x</span><span class="p">,</span> <span class="n">U</span> <span class="n">y</span><span class="p">)</span> <span class="k">const</span>
    93. 

  93.     <span class="p">{</span>
    94. 

  94.         <span class="k">return</span> <span class="n">x</span><span class="o">+</span><span class="n">y</span><span class="p">;</span>
    95. 

  95.     <span class="p">}</span>
    96. 

  96. <span class="p">};</span>
    97. 

  97. 

  98. <span class="kt">int</span> <span class="nf">main</span><span class="p">()</span> <span class="p">{</span>
    99. 

  99.     <span class="kt">int</span> <span class="n">r</span> <span class="o">=</span> <span class="n">indirect</span><span class="p">(</span><span class="n">std</span><span class="o">::</span><span class="n">make_unique</span><span class="o">&lt;</span><span class="n">sum</span><span class="o">&gt;</span><span class="p">())(</span><span class="mi">3</span><span class="p">,</span><span class="mi">2</span><span class="p">);</span>
    100. 

  100.     <span class="n">assert</span><span class="p">(</span><span class="n">r</span> <span class="o">==</span> <span class="mi">5</span><span class="p">);</span>
    101. 

  101. <span class="p">}</span>
    102. 

  102. </pre></div>
    103. 

  103. </div>
    104. 

  104. </div>
    105. 

  105. </div>
    106. 

  106. 

  107. 

  108.       </div>
    109. 

  109.   </div>
    110. 

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    111. 

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    116. 

  116.             &#169; Copyright 2016, Paul Fultz II.
    117. 

  117.         
    118. 

  118.           Created using <a href="http://sphinx-doc.org/">Sphinx</a> 1.5.6.
    119. 

  119.           <p>Distributed under the Boost Software License, Version 1.0.
    120. 

  120.           (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at 
    121. 

  121.           <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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