Re: [Boost-users] [Units] help with type-safe unit-specific conversions

AMDG justinleona@gmail.com wrote:

I have conversions working fine for built-in types, but for both scaled types and user-defined types I don't know how to get indirect conversions to compile.

Here is an example:

#include #include #include #include

void f() { typedef metric::bar_base_unit::unit_type bars;

typedef boost::units::scale<10,static_rational<3> > kilo_type; typedef make_scaled_unit::type kbars; const kbars kilobars;

typedef boost::units::scale<10,static_rational<6> > mega_type; typedef make_scaled_unitsi::pressure,mega_type::type mpa; const mpa megapascals;

typedef boost::units::quantitysi::pressure Pascals; typedef boost::units::quantity<mpa> Megapascals; typedef boost::units::quantity<kbars> Kilobars;

Megapascals p(.5*kilobars); std::cout << Kilobars(p) << std::endl; }

If I directly convert it works - e.g., Kilobars(Pascals(p)). Do I need to use BOOST_UNITS_DEFAULT_CONVERSION to set a default conversion? If so - which part(s) of the chain need it?

This ought to just work. Fixed in the trunk. In Christ, Steven Watanabe