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Implement workarounds for gcc 4.4

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This commit is contained in:
Victor Zverovich 2018-09-23 12:12:47 -07:00
parent 0ea3221d34
commit 48e6dcd0f2
2 changed files with 18 additions and 12 deletions
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4
include/fmt/color.h
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@ -266,6 +266,10 @@ template <>
inline void reset_color<wchar_t>(FILE *stream) FMT_NOEXCEPT {
fputs(internal::data::WRESET_COLOR, stream);
}
template <typename S>
struct is_format_string: std::integral_constant<
bool, std::is_empty<format_string_traits<S>>::value> {};
} // namespace internal
template <

26
include/fmt/core.h
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@ -216,6 +216,14 @@ FMT_CONSTEXPR size_t length(const Char *s) {
FMT_CONSTEXPR size_t length(const char *s) { return std::strlen(s); }
#endif
#if FMT_GCC_VERSION && FMT_GCC_VERSION < 405
template <typename... T>
struct is_constructible: std::false_type {};
#else
template <typename... T>
struct is_constructible: std::is_constructible<T...> {};
#endif
template <typename T>
struct no_formatter_error : std::false_type {};
} // namespace internal
@ -644,7 +652,7 @@ inline typename std::enable_if<
template <typename C, typename T, typename Char = typename C::char_type>
inline typename std::enable_if<
std::is_constructible<basic_string_view<Char>, T>::value,
internal::is_constructible<basic_string_view<Char>, T>::value,
init<C, basic_string_view<Char>, string_type>>::type
make_value(const T &val) { return basic_string_view<Char>(val); }
@ -652,7 +660,7 @@ template <typename C, typename T, typename Char = typename C::char_type>
inline typename std::enable_if<
!convert_to_int<T, Char>::value &&
!std::is_convertible<T, basic_string_view<Char>>::value &&
!std::is_constructible<basic_string_view<Char>, T>::value,
!internal::is_constructible<basic_string_view<Char>, T>::value,
// Implicit conversion to std::string is not handled here because it's
// unsafe: https://github.com/fmtlib/fmt/issues/729
init<C, const T &, custom_type>>::type
@ -1253,11 +1261,10 @@ namespace internal {
// If S is a format string type, format_string_traints<S>::char_type gives its
// character type.
template <typename S, typename Enable = void>
struct format_string_traits {
private:
// Use constructability as a way to detect if format_string_traits is
// specialized because other methods are broken on MSVC2013.
format_string_traits();
class format_string_traits {
// Use emptyness as a way to detect if format_string_traits is
// specialized because other methods are broken on MSVC2013 or gcc 4.4.
int dummy;
};
template <typename Char>
@ -1285,11 +1292,6 @@ struct format_string_traits<
basic_string_view<typename S::char_type>, S>::value>::type> :
format_string_traits_base<typename S::char_type> {};
template <typename S>
struct is_format_string :
std::integral_constant<
bool, std::is_constructible<format_string_traits<S>>::value> {};
template <typename S>
struct is_compile_string :
std::integral_constant<bool, std::is_base_of<compile_string, S>::value> {};