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Simplify locale handling

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This commit is contained in:
Victor Zverovich
2025-08-31 09:33:43 -07:00
parent 69324379f2
commit 489fd7ca4b
9 changed files with 116 additions and 127 deletions
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include/fmt/format-inl.h
+32 -27
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@@ -41,6 +41,38 @@ FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
}
#endif
#if FMT_USE_LOCALE
namespace detail {
using std::locale;
using std::numpunct;
using std::use_facet;
} // namespace detail
template <typename Locale, enable_if_t<(sizeof(Locale::collate) != 0), int>>
locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
static_assert(std::is_same<Locale, std::locale>::value, "");
}
#else
namespace detail {
struct locale {};
template <typename Char> struct numpunct {
auto grouping() const -> std::string { return "\03"; }
auto thousands_sep() const -> Char { return ','; }
auto decimal_point() const -> Char { return '.'; }
};
template <typename Facet> Facet use_facet(locale) { return {}; }
} // namespace detail
#endif // FMT_USE_LOCALE
template <typename Locale> auto locale_ref::get() const -> Locale {
using namespace detail;
static_assert(std::is_same<Locale, locale>::value, "");
#if FMT_USE_LOCALE
if (locale_) return *static_cast<const locale*>(locale_);
#endif
return locale();
}
namespace detail {
// DEPRECATED!
@@ -87,33 +119,6 @@ inline void fwrite_all(const void* ptr, size_t count, FILE* stream) {
FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
}
#if FMT_USE_LOCALE
using std::locale;
using std::numpunct;
using std::use_facet;
template <typename Locale>
locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
static_assert(std::is_same<Locale, locale>::value, "");
}
#else
struct locale {};
template <typename Char> struct numpunct {
auto grouping() const -> std::string { return "\03"; }
auto thousands_sep() const -> Char { return ','; }
auto decimal_point() const -> Char { return '.'; }
};
template <typename Facet> Facet use_facet(locale) { return {}; }
#endif // FMT_USE_LOCALE
template <typename Locale> auto locale_ref::get() const -> Locale {
static_assert(std::is_same<Locale, locale>::value, "");
#if FMT_USE_LOCALE
if (locale_) return *static_cast<const locale*>(locale_);
#endif
return locale();
}
template <typename Char>
FMT_FUNC auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char> {
auto&& facet = use_facet<numpunct<Char>>(loc.get<locale>());