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Add conditional_t for pre-C++14

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Victor Zverovich
2019-06-04 18:50:30 -07:00
parent 4aa0dc578b
commit c264e641ea
6 changed files with 36 additions and 40 deletions
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10
include/fmt/ranges.h
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@@ -94,11 +94,11 @@ template <typename T, typename _ = void> struct is_range_ : std::false_type {};
#if !FMT_MSC_VER || FMT_MSC_VER > 1800
template <typename T>
struct is_range_<T, typename std::conditional<
false,
conditional_helper<decltype(std::declval<T>().begin()),
decltype(std::declval<T>().end())>,
void>::type> : std::true_type {};
struct is_range_<
T, conditional_t<false,
conditional_helper<decltype(std::declval<T>().begin()),
decltype(std::declval<T>().end())>,
void>> : std::true_type {};
#endif
/// tuple_size and tuple_element check.