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use conditional_t inside detail::write instead of 2 overloads

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Alexey Ochapov 2020-08-19 22:17:17 +03:00
parent b1a55bc099
commit 6ec1ba5515
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1 changed files with 11 additions and 19 deletions
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30
include/fmt/format.h
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@ -1842,25 +1842,17 @@ OutputIt write(OutputIt out, const void* value) {
} }
template <typename Char, typename OutputIt, typename T, template <typename Char, typename OutputIt, typename T,
FMT_ENABLE_IF( typename Context = basic_format_context<OutputIt, Char>>
has_formatter<T, basic_format_context<OutputIt, Char>>::value)> auto write(OutputIt out, const T& value) ->
auto write(OutputIt out, const T& value) -> typename std::enable_if< typename std::enable_if<mapped_type_constant<T, Context>::value ==
mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value == type::custom_type,
type::custom_type, OutputIt>::type {
OutputIt>::type { using formatter_type =
basic_format_context<OutputIt, Char> ctx(out, {}, {}); conditional_t<has_formatter<T, Context>::value,
return formatter<T>().format(value, ctx); typename Context::template formatter_type<T>,
} fallback_formatter<T, Char>>;
Context ctx(out, {}, {});
template <typename Char, typename OutputIt, typename T, return formatter_type().format(value, ctx);
FMT_ENABLE_IF(has_fallback_formatter<
T, basic_format_context<OutputIt, Char>>::value)>
auto write(OutputIt out, const T& value) -> typename std::enable_if<
mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value ==
type::custom_type,
OutputIt>::type {
basic_format_context<OutputIt, Char> ctx(out, {}, {});
return fallback_formatter<T>().format(value, ctx);
} }
// An argument visitor that formats the argument and writes it via the output // An argument visitor that formats the argument and writes it via the output