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<a name="boost_convert_c___reference"></a>Boost.Convert C++ Reference</h2></div></div></div>
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<a name="header.boost.convert_hpp"></a>Header &lt;<a href="../../../../boost/convert.hpp" target="_top">boost/convert.hpp</a>&gt;</h3></div></div></div>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="boost/throw_on_failure.html" title="Global throw_on_failure">throw_on_failure</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> TypeIn<span class="special">,</span> <span class="keyword">typename</span> Converter<span class="special">&gt;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special">&lt;</span> <span class="identifier">TypeOut</span> <span class="special">&gt;</span> <a class="link" href="boost/convert_idm46028266603248.html" title="Function template convert"><span class="identifier">convert</span></a><span class="special">(</span><span class="identifier">TypeIn</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Converter</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> TypeIn<span class="special">&gt;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special">&lt;</span> <span class="identifier">TypeOut</span> <span class="special">&gt;</span> <a class="link" href="boost/convert_idm46028266596000.html" title="Function template convert"><span class="identifier">convert</span></a><span class="special">(</span><span class="identifier">TypeIn</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// Boost.Convert non-optional deployment interface. </span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> TypeIn<span class="special">,</span> <span class="keyword">typename</span> Converter<span class="special">&gt;</span>
<span class="identifier">TypeOut</span> <a name="boost.convert_idm46028254718736"></a><span class="identifier">convert</span><span class="special">(</span><span class="identifier">TypeIn</span> <span class="keyword">const</span> <span class="special">&amp;</span> value_in<span class="special">,</span> <span class="identifier">Converter</span> <span class="keyword">const</span> <span class="special">&amp;</span> converter<span class="special">,</span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> TypeIn<span class="special">,</span> <span class="keyword">typename</span> Converter<span class="special">,</span>
<span class="keyword">typename</span> Fallback<span class="special">&gt;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">enable_if</span><span class="special">&lt;</span> <span class="identifier">is_convertible</span><span class="special">&lt;</span> <span class="identifier">Fallback</span><span class="special">,</span> <span class="identifier">TypeOut</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">TypeOut</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
<a name="boost.convert_idm46028254713472"></a><span class="identifier">convert</span><span class="special">(</span><span class="identifier">TypeIn</span> <span class="keyword">const</span> <span class="special">&amp;</span> value_in<span class="special">,</span> <span class="identifier">Converter</span> <span class="keyword">const</span> <span class="special">&amp;</span> converter<span class="special">,</span>
<span class="identifier">Fallback</span> <span class="keyword">const</span> <span class="special">&amp;</span> fallback<span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> TypeIn<span class="special">,</span> <span class="keyword">typename</span> Converter<span class="special">,</span>
<span class="keyword">typename</span> Fallback<span class="special">&gt;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">enable_if</span><span class="special">&lt;</span> <span class="identifier">cnv</span><span class="special">::</span><span class="identifier">is_fun</span><span class="special">&lt;</span> <span class="identifier">Fallback</span><span class="special">,</span> <span class="identifier">TypeOut</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">TypeOut</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
<a name="boost.convert_idm46028254708448"></a><span class="identifier">convert</span><span class="special">(</span><span class="identifier">TypeIn</span> <span class="keyword">const</span> <span class="special">&amp;</span> value_in<span class="special">,</span> <span class="identifier">Converter</span> <span class="keyword">const</span> <span class="special">&amp;</span> converter<span class="special">,</span>
<span class="identifier">Fallback</span> fallback<span class="special">)</span><span class="special">;</span>
<span class="keyword">namespace</span> <span class="identifier">cnv</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Converter<span class="special">,</span> <span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> TypeIn<span class="special">&gt;</span>
<span class="keyword">struct</span> <a class="link" href="boost/cnv/reference.html" title="Struct template reference">reference</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Converter<span class="special">,</span> <span class="keyword">typename</span> TypeOut<span class="special">&gt;</span>
<span class="keyword">struct</span> <a class="link" href="boost/cnv/referenc_idm46028266624448.html" title="Struct template reference&lt;Converter, TypeOut, void&gt;">reference</a><span class="special">&lt;</span><span class="identifier">Converter</span><span class="special">,</span> <span class="identifier">TypeOut</span><span class="special">,</span> <span class="keyword">void</span><span class="special">&gt;</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> TypeIn<span class="special">,</span> <span class="keyword">typename</span> Converter<span class="special">&gt;</span>
<a class="link" href="boost/cnv/reference.html" title="Struct template reference">reference</a><span class="special">&lt;</span> <span class="identifier">Converter</span><span class="special">,</span> <span class="identifier">TypeOut</span><span class="special">,</span> <span class="identifier">TypeIn</span> <span class="special">&gt;</span> <a class="link" href="boost/cnv/apply_idm46028266613520.html" title="Function template apply"><span class="identifier">apply</span></a><span class="special">(</span><span class="identifier">Converter</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> Converter<span class="special">&gt;</span>
<a class="link" href="boost/cnv/reference.html" title="Struct template reference">reference</a><span class="special">&lt;</span> <span class="identifier">Converter</span><span class="special">,</span> <span class="identifier">TypeOut</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">&gt;</span> <a name="boost.cnv.apply_idm46028266608080"></a><span class="identifier">apply</span><span class="special">(</span><span class="identifier">Converter</span> <span class="keyword">const</span> <span class="special">&amp;</span> cnv<span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
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