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<a name="typed_value"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Class template typed_value</span></h2>
<p>boost::program_options::typed_value — </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> T, <span class="bold"><strong>typename</strong></span> charT = <span class="bold"><strong>char</strong></span>>
<span class="bold"><strong>class</strong></span> typed_value
: : <span class="bold"><strong>public</strong></span> boost::program_options::value_semantic_codecvt_helper< charT >
{
<span class="bold"><strong>public</strong></span>:
<span class="emphasis"><em>// <a href="typed_value.html#typed_valueconstruct-copy-destruct">construct/copy/destruct</a></em></span>
<a href="typed_value.html#id1113060-bb">typed_value</a>(T *);
<span class="emphasis"><em>// <a href="typed_value.html#id934494-bb">public member functions</a></em></span>
<span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a href="typed_value.html#id934499-bb">default_value</a>(<span class="bold"><strong>const</strong></span> T &) ;
<span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a href="typed_value.html#id797160-bb">default_value</a>(<span class="bold"><strong>const</strong></span> T &, <span class="bold"><strong>const</strong></span> std::string &) ;
<span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a href="typed_value.html#id1008859-bb">notifier</a>(function1< <span class="bold"><strong>void</strong></span>, <span class="bold"><strong>const</strong></span> T & >) ;
<span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a href="typed_value.html#id760792-bb">composing</a>() ;
<span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a href="typed_value.html#id1112969-bb">multitoken</a>() ;
<span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a href="typed_value.html#id658034-bb">zero_tokens</a>() ;
<span class="type">std::string</span> <a href="typed_value.html#id798654-bb">name</a>() <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>bool</strong></span></span> <a href="typed_value.html#id998228-bb">is_composing</a>() <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>unsigned</strong></span></span> <a href="typed_value.html#id998241-bb">min_tokens</a>() <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>unsigned</strong></span></span> <a href="typed_value.html#id998254-bb">max_tokens</a>() <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>void</strong></span></span> <a href="typed_value.html#id908506-bb">xparse</a>(boost::any &, <span class="bold"><strong>const</strong></span> std::vector< std::basic_string< charT > > &) <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>virtual</strong></span> <span class="bold"><strong>bool</strong></span></span> <a href="typed_value.html#id1104904-bb">apply_default</a>(boost::any &) <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>void</strong></span></span> <a href="typed_value.html#id1104938-bb">notify</a>(<span class="bold"><strong>const</strong></span> boost::any &) <span class="bold"><strong>const</strong></span>;
};</pre></div>
<div class="refsect1" lang="en">
<a name="id1257056"></a><h2>Description</h2>
<p>Class which handles value of a specific type. </p>
<div class="refsect2" lang="en">
<a name="id1257063"></a><h3>
<a name="typed_valueconstruct-copy-destruct"></a><code class="computeroutput">typed_value</code> construct/copy/destruct</h3>
<div class="orderedlist"><ol type="1"><li>
<pre class="literallayout"><a name="id1113060-bb"></a>typed_value(T * store_to);</pre>
<p>Ctor. The 'store_to' parameter tells where to store the value when it's known. The parameter can be NULL. </p>
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<div class="refsect2" lang="en">
<a name="id1257100"></a><h3>
<a name="id934494-bb"></a><code class="computeroutput">typed_value</code> public member functions</h3>
<div class="orderedlist"><ol type="1">
<li>
<pre class="literallayout"><span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a name="id934499-bb"></a>default_value(<span class="bold"><strong>const</strong></span> T & v) ;</pre>
<p>Specifies default value, which will be used if none is explicitly specified. The type 'T' should provide operator<< for ostream. </p>
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<li>
<pre class="literallayout"><span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a name="id797160-bb"></a>default_value(<span class="bold"><strong>const</strong></span> T & v, <span class="bold"><strong>const</strong></span> std::string & textual) ;</pre>
<p>Specifies default value, which will be used if none is explicitly specified. Unlike the above overload, the type 'T' need not provide operator<< for ostream, but textual representation of default value must be provided by the user. </p>
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<li>
<pre class="literallayout"><span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a name="id1008859-bb"></a>notifier(function1< <span class="bold"><strong>void</strong></span>, <span class="bold"><strong>const</strong></span> T & > f) ;</pre>
<p>Specifies a function to be called when the final value is determined. </p>
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<li>
<pre class="literallayout"><span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a name="id760792-bb"></a>composing() ;</pre>
<p>Specifies that the value is composing. See the 'is_composing' method for explanation. </p>
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<li>
<pre class="literallayout"><span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a name="id1112969-bb"></a>multitoken() ;</pre>
<p>Specifies that the value can span multiple tokens. </p>
</li>
<li><pre class="literallayout"><span class="type"><a href="typed_value.html" title="Class template typed_value">typed_value</a> *</span> <a name="id658034-bb"></a>zero_tokens() ;</pre></li>
<li><pre class="literallayout"><span class="type">std::string</span> <a name="id798654-bb"></a>name() <span class="bold"><strong>const</strong></span>;</pre></li>
<li><pre class="literallayout"><span class="type"><span class="bold"><strong>bool</strong></span></span> <a name="id998228-bb"></a>is_composing() <span class="bold"><strong>const</strong></span>;</pre></li>
<li><pre class="literallayout"><span class="type"><span class="bold"><strong>unsigned</strong></span></span> <a name="id998241-bb"></a>min_tokens() <span class="bold"><strong>const</strong></span>;</pre></li>
<li><pre class="literallayout"><span class="type"><span class="bold"><strong>unsigned</strong></span></span> <a name="id998254-bb"></a>max_tokens() <span class="bold"><strong>const</strong></span>;</pre></li>
<li>
<pre class="literallayout"><span class="type"><span class="bold"><strong>void</strong></span></span> <a name="id908506-bb"></a>xparse(boost::any & value_store,
<span class="bold"><strong>const</strong></span> std::vector< std::basic_string< charT > > & new_tokens) <span class="bold"><strong>const</strong></span>;</pre>
<p>Creates an instance of the 'validator' class and calls its operator() to perform athe ctual conversion. </p>
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<li>
<pre class="literallayout"><span class="type"><span class="bold"><strong>virtual</strong></span> <span class="bold"><strong>bool</strong></span></span> <a name="id1104904-bb"></a>apply_default(boost::any & value_store) <span class="bold"><strong>const</strong></span>;</pre>
<p>If default value was specified via previous call to 'default_value', stores that value into 'value_store'. Returns true if default value was stored. </p>
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<li>
<pre class="literallayout"><span class="type"><span class="bold"><strong>void</strong></span></span> <a name="id1104938-bb"></a>notify(<span class="bold"><strong>const</strong></span> boost::any & value_store) <span class="bold"><strong>const</strong></span>;</pre>
<p>If an address of variable to store value was specified when creating *this, stores the value there. Otherwise, does nothing. </p>
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