I&#39;m looking to define local units specific to each instance of a class. In this specific case I need to define a unit called &quot;ticks&quot; that is an angle defined relative to degree_base_unit and radian_base_unit. <meta http-equiv="content-type" content="text/html; charset=utf-8">Local unit definitions are required because I am dealing with varying physical motors that measure their position in &quot;ticks&quot;. The number of ticks per radian is arbitrarily defined by the manufacturer, so each class needs an independent &quot;ticks&quot; definition for that specific device loaded by a config file at runtime (so the user is not required to recompile every time they use a new motor). Some of the pieces I need look to be there within a combination of the examples:<div>

<br></div><div><a href="http://www.boost.org/doc/libs/1_45_0/libs/units/example/runtime_conversion_factor.cpp">http://www.boost.org/doc/libs/1_45_0/libs/units/example/runtime_conversion_factor.cpp</a> - Defines a runtime conversion for global units defined to exist at compile time</div>

<div><a href="http://www.boost.org/doc/libs/1_45_0/libs/units/example/runtime_conversion_factor.cpp"></a><a href="http://www.boost.org/doc/libs/1_45_0/libs/units/example/radar_beam_height.cpp">http://www.boost.org/doc/libs/1_45_0/libs/units/example/radar_beam_height.cpp</a> - Defines a global unit defined at compile time</div>

<div><a href="http://www.boost.org/doc/libs/1_45_0/libs/units/example/radar_beam_height.cpp"></a><a href="http://www.boost.org/doc/libs/1_45_0/libs/units/example/runtime_unit.cpp">http://www.boost.org/doc/libs/1_45_0/libs/units/example/runtime_unit.cpp</a> - Only works for units defined at compile time</div>

<div><div><div><br></div><div>The key problem here is that I need to define my units locally since they are irrelevant anywhere else while retaining the conversion and type safety of boost.units. It looks like the macros BOOST_UNITS_DEFINE_CONVERSION_FACTOR and BOOST_UNITS_DEFINE_CONVERSION_FACTOR_TEMPLATE both require definition in the global namespace.</div>

<div><br></div><div>Any thoughts would be greatly appreciated.<br clear="all"><div><br></div>Cheers!<div>Andrew Hundt</div><br>
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