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Use type_identity to block unnecessary template argument deduction (thanks Tim Song)

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This commit is contained in:
Victor Zverovich
2020-01-15 08:09:48 -08:00
parent 4bbe57cebf
commit c8dd9cc99d
7 changed files with 65 additions and 46 deletions
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12
test/format
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@@ -83,9 +83,9 @@ namespace std {
Out format_to(Out out, wstring_view fmt, const Args&... args);
template<class Out>
Out vformat_to(Out out, string_view fmt, format_args_t<Out, char> args);
Out vformat_to(Out out, string_view fmt, format_args_t<fmt::type_identity_t<Out>, char> args);
template<class Out>
Out vformat_to(Out out, wstring_view fmt, format_args_t<Out, wchar_t> args);
Out vformat_to(Out out, wstring_view fmt, format_args_t<fmt::type_identity_t<Out>, wchar_t> args);
template<class Out>
struct format_to_n_result {
@@ -730,17 +730,17 @@ wstring vformat(wstring_view fmt, wformat_args args);
template<class Out, class... Args>
Out format_to(Out out, string_view fmt, const Args&... args) {
using context = basic_format_context<Out, decltype(fmt)::value_type>;
return vformat_to(out, fmt, {make_format_args<context>(args...)});
return vformat_to(out, fmt, make_format_args<context>(args...));
}
template<class Out, class... Args>
Out format_to(Out out, wstring_view fmt, const Args&... args) {
using context = basic_format_context<Out, decltype(fmt)::value_type>;
return vformat_to(out, fmt, {make_format_args<context>(args...)});
return vformat_to(out, fmt, make_format_args<context>(args...));
}
template<class Out>
Out vformat_to(Out out, string_view fmt, format_args_t<Out, char> args) {
Out vformat_to(Out out, string_view fmt, format_args_t<fmt::type_identity_t<Out>, char> args) {
using range = fmt::internal::output_range<Out, char>;
detail::format_handler<detail::arg_formatter<range>, char, basic_format_context<Out, char>>
h(range(out), fmt, args, {});
@@ -749,7 +749,7 @@ template<class Out>
}
template<class Out>
Out vformat_to(Out out, wstring_view fmt, format_args_t<Out, wchar_t> args);
Out vformat_to(Out out, wstring_view fmt, format_args_t<fmt::type_identity_t<Out>, wchar_t> args);
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,