functions round_cast and trunc_cast

[1czajnik@…]

The functions are general versions of iround, and alike functions.

template < class R, class T, class Policy >
inline R round_cast( T const& x, Policy const& pol )
{
    BOOST_MATH_STD_USING
    T r = boost::math::round(x,pol);
    if( r > boost::integer_traits<R>::const_max || r < boost::integer_traits<R>::const_min )
       return static_cast<R>( boost::math::policies::raise_rounding_error(
               "cz::ar::round_cast<target_type,%1%>(%1%)", 0, x, pol ) );
    return static_cast<R>(r);
}

template < class R, class T >
inline R round_cast( T const& x )
{
    return round_cast<R>( x, boost::math::policies::policy<>() );
}

Analogically for trunc()...

[genevivewoo@…]

round & trunc.hpp