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Add size_cast for size reductions

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This commit is contained in:
Danny Robson 2012-06-08 16:46:03 +10:00
parent 58e69fbd44
commit 93275a43a7
1 changed files with 13 additions and 0 deletions
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13
types/casts.hpp
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@ -26,6 +26,7 @@
#include <limits>
//-----------------------------------------------------------------------------
namespace detail {
template <typename T, typename V>
T
@ -58,6 +59,7 @@ sign_cast (const V v)
{ return detail::_sign_cast<T,V>(v); }
//-----------------------------------------------------------------------------
namespace detail {
// Same sign, no possibility of truncation with larger target type
template <typename T, typename V>
@ -84,4 +86,15 @@ T
trunc_cast (V v)
{ return detail::_trunc_cast<T, V> (v); }
//-----------------------------------------------------------------------------
template <typename T, typename V>
T
size_cast (const V v) {
CHECK_HARD (std::numeric_limits<T>::min () <= v);
CHECK_HARD (std::numeric_limits<T>::max () >= v);
return static_cast<T> (v);
}
#endif