nerdcruft/libcruft-util
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Use lowest instead of min in casting checks

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This commit is contained in:
Danny Robson 2012-06-14 18:31:58 +10:00
parent 71c0f02873
commit 9124791a59
1 changed files with 19 additions and 5 deletions
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24
types/casts.hpp
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@ -78,9 +78,23 @@ namespace detail {
template <typename T, typename V> template <typename T, typename V>
T T
_trunc_cast (const typename std::enable_if<sizeof (T) < sizeof (V) && _trunc_cast (const typename std::enable_if<sizeof (T) < sizeof (V) &&
std::is_signed<T>::value == std::is_signed<V>::value, V>::type v) { std::is_signed<T>::value == std::is_signed<V>::value &&
CHECK_HARD (v <= std::numeric_limits<T>::max ()); std::is_integral<T>::value, V>::type v) {
checK_hard (v >= std::numeric_limits<T>::min ()); CHECK_HARD (v <= std::numeric_limits<T>::max ());
CHECK_HARD (v >= std::numeric_limits<T>::lowest ());
return static_cast<T> (v);
}
template <typename T, typename V>
T
_trunc_cast (const typename std::enable_if<sizeof (T) < sizeof (V) &&
std::is_signed<T>::value == std::is_signed<V>::value &&
std::is_floating_point<T>::value, V>::type v) {
CHECK_HARD (v <= std::numeric_limits<T>::max ());
CHECK_HARD (v >= std::numeric_limits<T>::lowest ());
CHECK_HARD (exactly_equal (remainder (v, 1), 0.0));
return static_cast<T> (v); return static_cast<T> (v);
} }
@ -97,8 +111,8 @@ trunc_cast (V v)
template <typename T, typename V> template <typename T, typename V>
T T
size_cast (const V v) { size_cast (const V v) {
CHECK_HARD (std::numeric_limits<T>::min () <= v); CHECK_HARD (std::numeric_limits<T>::lowest () <= v);
CHECK_HARD (std::numeric_limits<T>::max () >= v); CHECK_HARD (std::numeric_limits<T>::max () >= v);
return static_cast<T> (v); return static_cast<T> (v);
} }