nerdcruft/libcruft-util
1
0
Fork 0
Code Issues Releases Activity

types: add is_lossless_cast trait query

Browse Source
This commit is contained in:
Danny Robson 2014-07-15 19:51:42 +10:00
parent cb1824a387
commit 5820b75764
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
types/traits.hpp
View File

@ -52,4 +52,15 @@ template <typename T> struct always_unsigned {
template <> struct always_unsigned<double> { typedef double type; };
template <> struct always_unsigned<float > { typedef float type; };
//-----------------------------------------------------------------------------
template <typename T, typename U> struct is_lossless_cast : std::enable_if<
std::is_integral<T>::value &&
std::is_integral<U>::value &&
std::is_signed<T>::value == std::is_signed<U>::value &&
sizeof (T) <= sizeof (U),
std::true_type
>::value { };
#endif