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Simplify formatter selection

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This commit is contained in:
Victor Zverovich 2019-01-30 19:39:42 -08:00
parent 7ca8fc3b17
commit 3f52336e6c
1 changed files with 9 additions and 20 deletions
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29
include/fmt/core.h
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@ -629,31 +629,20 @@ template <typename Context> class value {
}
value(const void* val) { pointer = val; }
template <
typename T,
typename std::enable_if<
!is_constructible<typename Context::template formatter_type<T>::type,
internal::dummy_formatter_arg>::value,
int>::type = 0>
explicit value(const T& val) {
template <typename T> explicit value(const T& val) {
custom.value = &val;
// Get the formatter type through the context to allow different contexts
// have different extension points, e.g. `formatter<T>` for `format` and
// `printf_formatter<T>` for `printf`.
typedef typename Context::template formatter_type<T>::type formatter;
custom.format = &format_custom_arg<T, formatter>;
}
template <
typename T,
typename std::enable_if<
is_constructible<typename Context::template formatter_type<T>::type,
internal::dummy_formatter_arg>::value,
int>::type = 0>
explicit value(const T& val) {
custom.value = &val;
custom.format =
&format_custom_arg<T, internal::fallback_formatter<T, char_type>>;
enum {
formattable =
!is_constructible<formatter, internal::dummy_formatter_arg>::value
};
custom.format = &format_custom_arg<
T, typename std::conditional<
formattable, formatter,
internal::fallback_formatter<T, char_type>>::type>;
}
const named_arg_base<char_type>& as_named_arg() {