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coord/ops: don't use multiplication for negation

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This commit is contained in:
Danny Robson 2015-10-19 12:04:39 +11:00
parent 5ed95ec952
commit 634f2af9cc
1 changed files with 13 additions and 3 deletions
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16
coord/ops.hpp
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@ -171,10 +171,20 @@ namespace util {
//------------------------------------------------------------------------- //-------------------------------------------------------------------------
// negation // negation
template <size_t S, typename T, template<size_t,typename> class K> template <
K<S,T> operator- (K<S,T> k) size_t S,
typename T,
template<size_t,typename> class K
>
typename std::enable_if<
std::is_signed<T>::value,
K<S,T>
>::type
operator- (K<S,T> k)
{ {
return k * T{-1}; for (auto &v: k)
v = -v;
return k;
} }