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| <h2><span class="refentrytitle">Class template quantity<BOOST_UNITS_DIMENSIONLESS_UNIT(System), Y></span></h2> |
| <p>boost::units::quantity<BOOST_UNITS_DIMENSIONLESS_UNIT(System), Y></p> |
| </div> |
| <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="comment">// In header: <<a class="link" href="../../boost_units/Reference.html#header.boost.units.quantity_hpp" title="Header <boost/units/quantity.hpp>">boost/units/quantity.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System<span class="special">,</span> <span class="keyword">typename</span> Y<span class="special">></span> |
| <span class="keyword">class</span> <a class="link" href="quantity_BOOS_idp342141856.html" title="Class template quantity<BOOST_UNITS_DIMENSIONLESS_UNIT(System), Y>">quantity</a><span class="special"><</span><span class="identifier">BOOST_UNITS_DIMENSIONLESS_UNIT</span><span class="special">(</span><span class="identifier">System</span><span class="special">)</span><span class="special">,</span> <span class="identifier">Y</span><span class="special">></span> <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <a class="link" href="dimensionless_type.html" title="Struct dimensionless_type">dimensionless_type</a><span class="special">,</span> <span class="identifier">System</span> <span class="special">></span><span class="special">,</span> <span class="identifier">Y</span> <span class="special">></span> <a name="boost.units.quantity_BOOS_idp342141856.this_type"></a><span class="identifier">this_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">Y</span> <a name="boost.units.quantity_BOOS_idp342141856.value_type"></a><span class="identifier">value_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">System</span> <a name="boost.units.quantity_BOOS_idp342141856.system_type"></a><span class="identifier">system_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <a class="link" href="dimensionless_type.html" title="Struct dimensionless_type">dimensionless_type</a> <a name="boost.units.quantity_BOOS_idp342141856.dimension_type"></a><span class="identifier">dimension_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">dimension_type</span><span class="special">,</span> <span class="identifier">system_type</span> <span class="special">></span> <a name="boost.units.quantity_BOOS_idp342141856.unit_type"></a><span class="identifier">unit_type</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="quantity_BOOS_idp342141856.html#boost.units.quantity_BOOS_idp342141856construct-copy-destruct">construct/copy/destruct</a></span> |
| <a class="link" href="quantity_BOOS_idp342141856.html#idp342163152-bb"><span class="identifier">quantity</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="quantity_BOOS_idp342141856.html#idp342163440-bb"><span class="identifier">quantity</span></a><span class="special">(</span><span class="identifier">value_type</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="quantity_BOOS_idp342141856.html#idp342165152-bb"><span class="identifier">quantity</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> YY<span class="special">></span> |
| <a class="link" href="quantity_BOOS_idp342141856.html#idp342167392-bb"><span class="identifier">quantity</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">dimension_type</span><span class="special">,</span> <span class="identifier">system_type</span> <span class="special">></span><span class="special">,</span> <span class="identifier">YY</span> <span class="special">></span> <span class="special">&</span><span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> YY<span class="special">></span> |
| <span class="keyword">explicit</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342171600-bb"><span class="identifier">quantity</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">dimension_type</span><span class="special">,</span> <span class="identifier">system_type</span> <span class="special">></span><span class="special">,</span> <span class="identifier">YY</span> <span class="special">></span> <span class="special">&</span><span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System2<span class="special">,</span> <span class="keyword">typename</span> Y2<span class="special">></span> |
| <a class="link" href="quantity_BOOS_idp342141856.html#idp342179472-bb"><span class="identifier">quantity</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <a class="link" href="dimensionless_type.html" title="Struct dimensionless_type">dimensionless_type</a><span class="special">,</span> <span class="identifier">System2</span> <span class="special">></span><span class="special">,</span> <span class="identifier">Y2</span> <span class="special">></span> <span class="special">&</span><span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System2<span class="special">,</span> <span class="keyword">typename</span> Y2<span class="special">></span> |
| <span class="keyword">explicit</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342186848-bb"><span class="identifier">quantity</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <a class="link" href="dimensionless_type.html" title="Struct dimensionless_type">dimensionless_type</a><span class="special">,</span> <span class="identifier">System2</span> <span class="special">></span><span class="special">,</span> <span class="identifier">Y2</span> <span class="special">></span> <span class="special">&</span><span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System2<span class="special">,</span> <span class="keyword">typename</span> Y2<span class="special">></span> |
| <span class="keyword">explicit</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342194496-bb"><span class="identifier">quantity</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <a class="link" href="dimensionless_type.html" title="Struct dimensionless_type">dimensionless_type</a><span class="special">,</span> <span class="identifier">System2</span> <span class="special">></span><span class="special">,</span> <span class="identifier">Y2</span> <span class="special">></span> <span class="special">&</span><span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342166128-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> YY<span class="special">></span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342176080-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">dimension_type</span><span class="special">,</span> <span class="identifier">system_type</span> <span class="special">></span><span class="special">,</span> <span class="identifier">YY</span> <span class="special">></span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System2<span class="special">></span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342200096-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <span class="identifier">BOOST_UNITS_DIMENSIONLESS_UNIT</span><span class="special">(</span><span class="identifier">System2</span><span class="special">)</span><span class="special">,</span> <span class="identifier">Y</span> <span class="special">></span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="quantity_BOOS_idp342141856.html#idp342151296-bb">public member functions</a></span> |
| <a class="link" href="quantity_BOOS_idp342141856.html#idp342151856-bb"><span class="keyword">operator</span> <span class="identifier">value_type</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342153712-bb"><span class="identifier">value</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342155648-bb"><span class="keyword">operator</span><span class="special">+=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342157584-bb"><span class="keyword">operator</span><span class="special">-=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342159520-bb"><span class="keyword">operator</span><span class="special">*=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342161456-bb"><span class="keyword">operator</span><span class="special">/=</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="quantity_BOOS_idp342141856.html#idp342203024-bb">public static functions</a></span> |
| <span class="keyword">static</span> <span class="identifier">this_type</span> <a class="link" href="quantity_BOOS_idp342141856.html#idp342203584-bb"><span class="identifier">from_value</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="idp495061616"></a><h2>Description</h2> |
| <p>Specialization for dimensionless quantities. Implicit conversions between unit systems are allowed because all dimensionless quantities are equivalent. Implicit construction and assignment from and conversion to <code class="computeroutput">value_type</code> is also allowed. </p> |
| <div class="refsect2"> |
| <a name="idp495063232"></a><h3> |
| <a name="boost.units.quantity_BOOS_idp342141856construct-copy-destruct"></a><code class="computeroutput">quantity</code> |
| public |
| construct/copy/destruct</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"><pre class="literallayout"><a name="idp342163152-bb"></a><span class="identifier">quantity</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="idp342163440-bb"></a><span class="identifier">quantity</span><span class="special">(</span><span class="identifier">value_type</span> val<span class="special">)</span><span class="special">;</span></pre>construction from raw <code class="computeroutput">value_type</code> is allowed </li> |
| <li class="listitem"><pre class="literallayout"><a name="idp342165152-bb"></a><span class="identifier">quantity</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span> source<span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> YY<span class="special">></span> |
| <a name="idp342167392-bb"></a><span class="identifier">quantity</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">dimension_type</span><span class="special">,</span> <span class="identifier">system_type</span> <span class="special">></span><span class="special">,</span> <span class="identifier">YY</span> <span class="special">></span> <span class="special">&</span> source<span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span></pre>implicit conversion between value types is allowed if allowed for value types themselves </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> YY<span class="special">></span> |
| <span class="keyword">explicit</span> <a name="idp342171600-bb"></a><span class="identifier">quantity</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">dimension_type</span><span class="special">,</span> <span class="identifier">system_type</span> <span class="special">></span><span class="special">,</span> <span class="identifier">YY</span> <span class="special">></span> <span class="special">&</span> source<span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span></pre>implicit conversion between value types is not allowed if not allowed for value types themselves </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System2<span class="special">,</span> <span class="keyword">typename</span> Y2<span class="special">></span> |
| <a name="idp342179472-bb"></a><span class="identifier">quantity</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <a class="link" href="dimensionless_type.html" title="Struct dimensionless_type">dimensionless_type</a><span class="special">,</span> <span class="identifier">System2</span> <span class="special">></span><span class="special">,</span> <span class="identifier">Y2</span> <span class="special">></span> <span class="special">&</span> source<span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span></pre>implicit conversion between different unit systems is allowed </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System2<span class="special">,</span> <span class="keyword">typename</span> Y2<span class="special">></span> |
| <span class="keyword">explicit</span> <a name="idp342186848-bb"></a><span class="identifier">quantity</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <a class="link" href="dimensionless_type.html" title="Struct dimensionless_type">dimensionless_type</a><span class="special">,</span> <span class="identifier">System2</span> <span class="special">></span><span class="special">,</span> <span class="identifier">Y2</span> <span class="special">></span> <span class="special">&</span> source<span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span></pre>implicit conversion between different unit systems is allowed </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System2<span class="special">,</span> <span class="keyword">typename</span> Y2<span class="special">></span> |
| <span class="keyword">explicit</span> <a name="idp342194496-bb"></a><span class="identifier">quantity</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <a class="link" href="dimensionless_type.html" title="Struct dimensionless_type">dimensionless_type</a><span class="special">,</span> <span class="identifier">System2</span> <span class="special">></span><span class="special">,</span> <span class="identifier">Y2</span> <span class="special">></span> <span class="special">&</span> source<span class="special">,</span> |
| <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>conversion between different unit systems is explicit when the units are not equivalent. </p> |
| </li> |
| <li class="listitem"><pre class="literallayout"><span class="identifier">this_type</span> <span class="special">&</span> <a name="idp342166128-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span> source<span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> YY<span class="special">></span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a name="idp342176080-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <a class="link" href="unit.html" title="Class template unit">unit</a><span class="special"><</span> <span class="identifier">dimension_type</span><span class="special">,</span> <span class="identifier">system_type</span> <span class="special">></span><span class="special">,</span> <span class="identifier">YY</span> <span class="special">></span> <span class="special">&</span> source<span class="special">)</span><span class="special">;</span></pre>implicit assignment between value types is allowed if allowed for value types themselves </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> System2<span class="special">></span> |
| <span class="identifier">this_type</span> <span class="special">&</span> <a name="idp342200096-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="quantity.html" title="Class template quantity">quantity</a><span class="special"><</span> <span class="identifier">BOOST_UNITS_DIMENSIONLESS_UNIT</span><span class="special">(</span><span class="identifier">System2</span><span class="special">)</span><span class="special">,</span> <span class="identifier">Y</span> <span class="special">></span> <span class="special">&</span> source<span class="special">)</span><span class="special">;</span></pre>implicit assignment between different unit systems is allowed </li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="idp495225040"></a><h3> |
| <a name="idp342151296-bb"></a><code class="computeroutput">quantity</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="idp342151856-bb"></a><span class="keyword">operator</span> <span class="identifier">value_type</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>implicit conversion to <code class="computeroutput">value_type</code> is allowed </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&</span> <a name="idp342153712-bb"></a><span class="identifier">value</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>constant accessor to value <p>can add a quantity of the same type if add_typeof_helper<value_type,value_type>::type is convertible to value_type </p> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">this_type</span> <span class="special">&</span> <a name="idp342155648-bb"></a><span class="keyword">operator</span><span class="special">+=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span> source<span class="special">)</span><span class="special">;</span></pre>can subtract a quantity of the same type if subtract_typeof_helper<value_type,value_type>::type is convertible to value_type </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">this_type</span> <span class="special">&</span> <a name="idp342157584-bb"></a><span class="keyword">operator</span><span class="special">-=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">this_type</span> <span class="special">&</span> source<span class="special">)</span><span class="special">;</span></pre>can multiply a quantity by a scalar value_type if multiply_typeof_helper<value_type,value_type>::type is convertible to value_type </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">this_type</span> <span class="special">&</span> <a name="idp342159520-bb"></a><span class="keyword">operator</span><span class="special">*=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&</span> val<span class="special">)</span><span class="special">;</span></pre>can divide a quantity by a scalar value_type if divide_typeof_helper<value_type,value_type>::type is convertible to value_type </li> |
| <li class="listitem"><pre class="literallayout"><span class="identifier">this_type</span> <span class="special">&</span> <a name="idp342161456-bb"></a><span class="keyword">operator</span><span class="special">/=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&</span> val<span class="special">)</span><span class="special">;</span></pre></li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="idp495271280"></a><h3> |
| <a name="idp342203024-bb"></a><code class="computeroutput">quantity</code> public static functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"> |
| <pre class="literallayout"><span class="keyword">static</span> <span class="identifier">this_type</span> <a name="idp342203584-bb"></a><span class="identifier">from_value</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&</span> val<span class="special">)</span><span class="special">;</span></pre>Construct quantity directly from <code class="computeroutput">value_type</code>. </li></ol></div> |
| </div> |
| </div> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2003-2008 Matthias Christian Schabel<br>Copyright © 2007-2010 Steven |
| Watanabe<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
| </p> |
| </div></td> |
| </tr></table> |
| <hr> |
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