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floating_point_promotion

template <class T>
struct floating_point_promotion
{
   typedef see-below type;
};

type: If floating point promotion can be applied to an rvalue of type T, then applies floating point promotion to T and keeps cv-qualifiers of T, otherwise leaves T unchanged.

C++ Standard Reference: 4.6.

Header: #include <boost/type_traits/floating_point_promotion.hpp> or #include <boost/type_traits.hpp>

Table 1.18. Examples

Expression

Result Type

floating_point_promotion<float const>::type

double const

floating_point_promotion<float&>::type

float&

floating_point_promotion<short>::type

short



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