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Update optional documentation.
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<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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<title>In-Place Factories</title>
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<link rel="stylesheet" href="../boostbook.css" type="text/css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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<link rel="home" href="../index.html" title="Chapter 1. Boost.Optional">
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<link rel="up" href="../index.html" title="Chapter 1. Boost.Optional">
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<link rel="prev" href="rebinding_semantics_for_assignment_of_optional_references.html" title="Rebinding semantics for assignment of optional references">
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<div class="spirit-nav">
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<a accesskey="p" href="rebinding_semantics_for_assignment_of_optional_references.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><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="a_note_about_optional_bool_.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a>
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</div>
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<div class="section">
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<div class="section boost_optional_in_place_factories">
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="boost_optional.in_place_factories"></a><a class="link" href="in_place_factories.html" title="In-Place Factories">In-Place Factories</a>
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</h2></div></div></div>
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</p>
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<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">X</span>
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<span class="special">{</span>
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<span class="identifier">X</span> <span class="special">(</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">:::</span><span class="identifier">string</span> <span class="special">)</span> <span class="special">;</span>
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<span class="identifier">X</span> <span class="special">(</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">)</span> <span class="special">;</span>
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<span class="special">}</span> <span class="special">;</span>
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<span class="keyword">class</span> <span class="identifier">W</span>
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@ -50,8 +50,8 @@
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<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">()</span>
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<span class="special">{</span>
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<span class="comment">// Temporary object created.
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</span> <span class="identifier">W</span> <span class="special">(</span> <span class="identifier">X</span><span class="special">(</span><span class="number">123</span><span class="special">,</span><span class="string">"hello"</span><span class="special">)</span> <span class="special">)</span> <span class="special">;</span>
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<span class="comment">// Temporary object created.</span>
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<span class="identifier">W</span> <span class="special">(</span> <span class="identifier">X</span><span class="special">(</span><span class="number">123</span><span class="special">,</span><span class="string">"hello"</span><span class="special">)</span> <span class="special">)</span> <span class="special">;</span>
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<span class="special">}</span>
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</pre>
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<p>
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@ -71,9 +71,9 @@
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<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">()</span>
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<span class="special">{</span>
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<span class="comment">// Wrapped object constructed in-place
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</span> <span class="comment">// No temporary created.
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</span> <span class="identifier">W</span> <span class="special">(</span><span class="number">123</span><span class="special">,</span><span class="string">"hello"</span><span class="special">)</span> <span class="special">;</span>
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<span class="comment">// Wrapped object constructed in-place</span>
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<span class="comment">// No temporary created.</span>
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<span class="identifier">W</span> <span class="special">(</span><span class="number">123</span><span class="special">,</span><span class="string">"hello"</span><span class="special">)</span> <span class="special">;</span>
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<span class="special">}</span>
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</pre>
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<p>
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@ -119,15 +119,15 @@
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<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">()</span>
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<span class="special">{</span>
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<span class="comment">// Wrapped object constructed in-place via a TypedInPlaceFactory.
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</span> <span class="comment">// No temporary created.
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</span> <span class="identifier">W</span> <span class="special">(</span> <span class="identifier">TypedInPlaceFactory2</span><span class="special"><</span><span class="identifier">X</span><span class="special">,</span><span class="keyword">int</span><span class="special">,</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">>(</span><span class="number">123</span><span class="special">,</span><span class="string">"hello"</span><span class="special">))</span> <span class="special">;</span>
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<span class="comment">// Wrapped object constructed in-place via a TypedInPlaceFactory.</span>
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<span class="comment">// No temporary created.</span>
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<span class="identifier">W</span> <span class="special">(</span> <span class="identifier">TypedInPlaceFactory2</span><span class="special"><</span><span class="identifier">X</span><span class="special">,</span><span class="keyword">int</span><span class="special">,</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">>(</span><span class="number">123</span><span class="special">,</span><span class="string">"hello"</span><span class="special">))</span> <span class="special">;</span>
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<span class="special">}</span>
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</pre>
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<p>
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The factories are divided in two groups:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<span class="underline">TypedInPlaceFactories</span>: those which
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take the target type as a primary template parameter.
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@ -170,9 +170,9 @@
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<span class="keyword">void</span> <span class="identifier">foo</span><span class="special">()</span>
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<span class="special">{</span>
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<span class="comment">// Wrapped object constructed in-place via a InPlaceFactory.
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</span> <span class="comment">// No temporary created.
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</span> <span class="identifier">W</span> <span class="special">(</span> <span class="identifier">in_place</span><span class="special">(</span><span class="number">123</span><span class="special">,</span><span class="string">"hello"</span><span class="special">)</span> <span class="special">)</span> <span class="special">;</span>
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<span class="comment">// Wrapped object constructed in-place via a InPlaceFactory.</span>
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<span class="comment">// No temporary created.</span>
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<span class="identifier">W</span> <span class="special">(</span> <span class="identifier">in_place</span><span class="special">(</span><span class="number">123</span><span class="special">,</span><span class="string">"hello"</span><span class="special">)</span> <span class="special">)</span> <span class="special">;</span>
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<span class="special">}</span>
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</pre>
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<p>
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