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  28 <h2><span class="refentrytitle">Macro BOOST_UNITS_DEFINE_CONVERSION_FACTOR</span></h2>
  29 <p>BOOST_UNITS_DEFINE_CONVERSION_FACTOR</p>
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  31 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  32 <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="boost_units/Reference.html#header.boost.units.conversion_hpp" title="Header &lt;boost/units/conversion.hpp&gt;">boost/units/conversion.hpp</a>&gt;
  33
  34 </span>BOOST_UNITS_DEFINE_CONVERSION_FACTOR(Source, Destination, type_, value_)</pre></div>
  35 <div class="refsect1">
  36 <a name="idp492892240"></a><h2>Description</h2>
  37 <p>Defines the conversion factor from a base unit to any unit or to another base unit with the correct dimensions. Uses of this macro must appear at global scope. If the destination unit is a base unit or a unit that contains only one base unit which is raised to the first power (e.g. feet-&gt;meters) the reverse (meters-&gt;feet in this example) need not be defined explicitly. </p>
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  42 <td align="right"><div class="copyright-footer">Copyright &#169; 2003-2008 Matthias Christian Schabel<br>Copyright &#169; 2007-2010 Steven
  43       Watanabe<p>
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