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Add loc_value

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This commit is contained in:
Victor Zverovich 2022-09-02 13:45:23 -07:00
parent fc5e59fe4a
commit f187274d36
4 changed files with 52 additions and 38 deletions
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2
include/fmt/format-inl.h
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@ -118,7 +118,7 @@ template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref) {
}
#endif
FMT_FUNC auto write_int(appender out, unsigned long long value,
FMT_FUNC auto write_int(appender out, loc_value value,
const format_specs& specs, locale_ref loc) -> bool {
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
auto locale = loc.get<std::locale>();

49
include/fmt/format.h
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@ -985,6 +985,29 @@ constexpr auto compile_string_to_view(detail::std_string_view<Char> s)
}
} // namespace detail_exported
// A value to localize.
struct loc_value {
union {
unsigned long long ulong_long_value;
};
};
// A locale facet that formats numeric values in UTF-8.
// It is parameterized on the locale to avoid heavy <locale> include.
template <typename Locale> class num_format_facet : public Locale::facet {
public:
static FMT_API typename Locale::id id;
void put(appender out, loc_value val, const format_specs& specs,
Locale& loc) const {
do_put(out, val, specs, loc);
}
protected:
virtual void do_put(appender out, loc_value val, const format_specs& specs,
Locale& loc) const = 0;
};
FMT_BEGIN_DETAIL_NAMESPACE
template <typename T> struct is_integral : std::is_integral<T> {};
@ -2014,11 +2037,11 @@ auto write_int(OutputIt out, UInt value, unsigned prefix,
});
}
FMT_API auto write_int(appender out, unsigned long long value,
const format_specs& specs, locale_ref loc) -> bool;
FMT_API auto write_int(appender out, loc_value value, const format_specs& specs,
locale_ref loc) -> bool;
template <typename OutputIt, typename Char>
inline auto write_int(OutputIt, unsigned long long,
const basic_format_specs<Char>&, locale_ref) -> bool {
inline auto write_int(OutputIt, loc_value, const basic_format_specs<Char>&,
locale_ref) -> bool {
return false;
}
@ -2028,7 +2051,7 @@ auto write_int(OutputIt& out, UInt value, unsigned prefix,
auto result = false;
auto buf = memory_buffer();
if (sizeof(value) <= sizeof(unsigned long long))
result = write_int(appender(buf), static_cast<unsigned long long>(value),
result = write_int(appender(buf), {static_cast<unsigned long long>(value)},
specs, loc);
if (!result) {
auto grouping = digit_grouping<Char>(loc);
@ -4176,22 +4199,6 @@ extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
FMT_END_DETAIL_NAMESPACE
// A locale facet that formats numeric values in UTF-8.
// It is parameterized on the locale to avoid heavy <locale> include.
template <typename Locale> class num_format_facet : public Locale::facet {
public:
static FMT_API typename Locale::id id;
void put(appender out, unsigned long long val, const format_specs& specs,
Locale& loc) const {
do_put(out, val, specs, loc);
}
protected:
virtual void do_put(appender out, unsigned long long val,
const format_specs& specs, Locale& loc) const = 0;
};
#if FMT_USE_USER_DEFINED_LITERALS
inline namespace literals {
/**

23
test/format-test.cc
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@ -2311,3 +2311,26 @@ TEST(format_int_test, format_int) {
os << max_value<int64_t>();
EXPECT_EQ(os.str(), fmt::format_int(max_value<int64_t>()).str());
}
#ifdef FMT_STATIC_THOUSANDS_SEPARATOR
# include <locale>
class num_format : public fmt::num_format_facet<std::locale> {
protected:
void do_put(fmt::appender out, fmt::loc_value, const fmt::format_specs&,
std::locale&) const override;
};
void num_format::do_put(fmt::appender out, fmt::loc_value value,
const fmt::format_specs&, std::locale&) const {
fmt::format_to(out, "[{}]", value.ulong_long_value);
}
TEST(format_test, num_format) {
auto loc = std::locale(std::locale(), new num_format());
EXPECT_EQ(fmt::format(loc, "{:L}", 42), "[42]");
EXPECT_EQ(fmt::format(loc, "{:L}", -42), "[-42]");
}
#endif // FMT_STATIC_THOUSANDS_SEPARATOR

16
test/xchar-test.cc
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@ -520,20 +520,4 @@ TEST(locale_test, sign) {
EXPECT_EQ(fmt::format(std::locale(), L"{:L}", -50), L"-50");
}
class num_format : public fmt::num_format_facet<std::locale> {
protected:
void do_put(fmt::appender out, unsigned long long, const fmt::format_specs&,
std::locale&) const override;
};
void num_format::do_put(fmt::appender out, unsigned long long value,
const fmt::format_specs&, std::locale&) const {
fmt::format_to(out, "[{}]", value);
}
TEST(locale_test, num_format) {
auto loc = std::locale(std::locale(), new num_format());
EXPECT_EQ(fmt::format(loc, "{:L}", 42), "[42]");
}
#endif // FMT_STATIC_THOUSANDS_SEPARATOR