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Add some utility overloads

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This commit is contained in:
rexy712 2020-05-07 15:28:21 -07:00
parent a4487f29e1
commit 25599e61ec
1 changed files with 23 additions and 0 deletions
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23
include/rexy/cx/utility.hpp
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@ -34,6 +34,22 @@ namespace rexy::cx{
l = std::move(r); l = std::move(r);
r = std::move(tmp); r = std::move(tmp);
} }
template<class Iter1, class Iter2>
constexpr Iter2 swap_ranges(Iter1 start1, Iter1 end1, Iter2 start2)
noexcept(noexcept(cx::swap(*start1, *start2)))
{
while(start1 != end1){
cx::swap(start1++, start2++);
}
return start2;
}
template<class T, size_t N>
constexpr void swap(T (&l)[N], T (&r)[N])
noexcept(noexcept(cx::swap(*l, *r)))
{
cx::swap_ranges(l, l+N, r);
}
template<class T, class U = T> template<class T, class U = T>
constexpr T exchange(T& l, U&& r) constexpr T exchange(T& l, U&& r)
noexcept(std::is_nothrow_assignable<T,U&&>::value && noexcept(std::is_nothrow_assignable<T,U&&>::value &&
@ -74,6 +90,13 @@ namespace rexy::cx{
for(;*l == *r && *l;++l, ++r); for(;*l == *r && *l;++l, ++r);
return (static_cast<uchar>(*l)) - (static_cast<uchar>(*r)); return (static_cast<uchar>(*l)) - (static_cast<uchar>(*r));
} }
constexpr void memcpy(void* l, const void* r, size_t n){
char* ld = static_cast<char*>(l);
const char* rd = static_cast<const char*>(r);
for(size_t i = 0;i < n;++i){
ld[i] = rd[i];
}
}
} }
} }