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iterator_util: Make Reverse constexpr

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C++17 makes non-member rbegin(), rend(), crbegin(), and crend() constexpr, allowing this to also be constexpr.
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Lioncash 2018-01-31 10:01:55 -05:00 committed by MerryMage
parent ab9b5fb8aa
commit 744495e23d
1 changed files with 3 additions and 3 deletions
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6
src/common/iterator_util.h
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@ -15,12 +15,12 @@ template<typename T>
struct ReverseAdapter { struct ReverseAdapter {
T& iterable; T& iterable;
auto begin() { constexpr auto begin() {
using namespace std; using namespace std;
return rbegin(iterable); return rbegin(iterable);
} }
auto end() { constexpr auto end() {
using namespace std; using namespace std;
return rend(iterable); return rend(iterable);
} }
@ -29,7 +29,7 @@ struct ReverseAdapter {
} // namespace detail } // namespace detail
template<typename T> template<typename T>
detail::ReverseAdapter<T> Reverse(T&& iterable) { constexpr detail::ReverseAdapter<T> Reverse(T&& iterable) {
return detail::ReverseAdapter<T>{iterable}; return detail::ReverseAdapter<T>{iterable};
} }