Units developers/users,<br><br>I need some advice. I am fairly confident boost::units is the way for us to go and support a design- or compile-time unit safe calculations environment. However, now for the tricky business of exposing that functionality to the rest of our application. I am in the midst of trying to do this by exposing some Managed C++ classes, plausibly representing each kind of dimension; to get started with I implemented a base Quantity class, and I am extending that to a Length. I would like to include a quantity&lt;si::length&gt; member, for starters, but I am receiving a build error:<br>
<br>Error    2    error C4368: cannot define &#39;si_l&#39; as a member of managed &#39;CS::Boost::Units::Dimensions::Length&#39;: mixed types are not supported    c:\source\safetyvalve2011\cs.calculations.managed\units\Length.h    41    CS.Calculations.Managed<br>
<br>This might extend to include a quantity&lt;us::length&gt;, for instance; and so on for other unit systems.<br><br>Whatever .NET class we expose, this will act like the proxy between the application layer and the calculations layer; we might have Dimension-aware UI controls that work on Length, or Quantity, for instance. That sort of thing.<br>
<br>Anyone encountered anything like this before? Or have suggestions how we might overcome this hurdle?<br><br>I&#39;m puzzling this one through in the meantime...<br><br>Thank you...<br><br>Regards,<br><br>Michael<br>