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Fix handling of exotic character types

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This commit is contained in:
Victor Zverovich 2021-10-17 08:58:41 -07:00
parent 684e2fdc94
commit 1266c2b600
2 changed files with 13 additions and 2 deletions
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10
include/fmt/core.h
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@ -1285,8 +1285,14 @@ template <typename Context> struct arg_mapper {
FMT_CONSTEXPR FMT_INLINE auto map(T val) -> char_type {
return val;
}
template <typename T, FMT_ENABLE_IF(std::is_same<T, wchar_t>::value &&
!std::is_same<wchar_t, char_type>::value)>
template <typename T, enable_if_t<(std::is_same<T, wchar_t>::value ||
#ifdef __cpp_char8_t
std::is_same<T, char8_t>::value ||
#endif
std::is_same<T, char16_t>::value ||
std::is_same<T, char32_t>::value) &&
!std::is_same<T, char_type>::value,
int> = 0>
FMT_CONSTEXPR FMT_INLINE auto map(T) -> unformattable_char {
return {};
}

5
test/core-test.cc
View File

@ -739,6 +739,11 @@ TEST(core_test, is_formattable) {
static_assert(fmt::is_formattable<const signed char*>::value, "");
static_assert(fmt::is_formattable<const unsigned char*>::value, "");
static_assert(!fmt::is_formattable<wchar_t>::value, "");
#ifdef __cpp_char8_t
static_assert(!fmt::is_formattable<char8_t>::value, "");
#endif
static_assert(!fmt::is_formattable<char16_t>::value, "");
static_assert(!fmt::is_formattable<char32_t>::value, "");
static_assert(!fmt::is_formattable<const wchar_t*>::value, "");
static_assert(!fmt::is_formattable<const wchar_t[3]>::value, "");
static_assert(!fmt::is_formattable<fmt::basic_string_view<wchar_t>>::value,