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Make iterator_t an alias template

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This commit is contained in:
Victor Zverovich 2019-06-13 21:32:58 -07:00
parent 874d6727e4
commit 12f4683883
1 changed files with 4 additions and 5 deletions
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9
include/fmt/format.h
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@ -266,9 +266,8 @@ inline Dest bit_cast(const Source& source) {
}
// An implementation of iterator_t for pre-C++20 systems.
template <typename T> struct iterator_t {
typedef decltype(std::begin(std::declval<const T&>())) type;
};
template <typename T>
using iterator_t = decltype(std::begin(std::declval<T&>()));
template <typename Allocator>
typename Allocator::value_type* allocate(Allocator& alloc, std::size_t n) {
@ -3313,13 +3312,13 @@ arg_join<It, wchar_t> join(It begin, It end, wstring_view sep) {
\endrst
*/
template <typename Range>
arg_join<typename internal::iterator_t<Range>::type, char> join(
arg_join<internal::iterator_t<const Range>, char> join(
const Range& range, string_view sep) {
return join(std::begin(range), std::end(range), sep);
}
template <typename Range>
arg_join<typename internal::iterator_t<Range>::type, wchar_t> join(
arg_join<internal::iterator_t<const Range>, wchar_t> join(
const Range& range, wstring_view sep) {
return join(std::begin(range), std::end(range), sep);
}