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Implement %j specifier for std::chrono::duration

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This adds support for `%j` presentation type for duration types:

> "If the type being formatted is a specialization of duration, the decimal
number of days without padding."

Fixes #3643.
This commit is contained in:
Ivan Shapovalov 2023-12-02 19:12:36 +04:00
parent 69f01fe893
commit 78a611777e
2 changed files with 9 additions and 1 deletions
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8
include/fmt/chrono.h
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@ -1622,6 +1622,7 @@ struct chrono_format_checker : null_chrono_spec_handler<chrono_format_checker> {
template <typename Char>
FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
FMT_CONSTEXPR void on_day_of_year() {}
FMT_CONSTEXPR void on_24_hour(numeric_system, pad_type) {}
FMT_CONSTEXPR void on_12_hour(numeric_system, pad_type) {}
FMT_CONSTEXPR void on_minute(numeric_system, pad_type) {}
@ -1806,6 +1807,7 @@ struct chrono_formatter {
return true;
}
Rep days() const { return static_cast<Rep>(s.count() / 86400); }
Rep hour() const { return static_cast<Rep>(mod((s.count() / 3600), 24)); }
Rep hour12() const {
@ -1884,10 +1886,14 @@ struct chrono_formatter {
void on_dec0_week_of_year(numeric_system) {}
void on_dec1_week_of_year(numeric_system) {}
void on_iso_week_of_year(numeric_system) {}
void on_day_of_year() {}
void on_day_of_month(numeric_system) {}
void on_day_of_month_space(numeric_system) {}
void on_day_of_year() {
if (handle_nan_inf()) return;
write(days(), 0);
}
void on_24_hour(numeric_system ns, pad_type pad) {
if (handle_nan_inf()) return;

2
test/chrono-test.cc
View File

@ -537,6 +537,8 @@ TEST(chrono_test, format_specs) {
EXPECT_EQ("12", fmt::format("{:%I}", std::chrono::hours(24)));
EXPECT_EQ("04", fmt::format("{:%I}", std::chrono::hours(4)));
EXPECT_EQ("02", fmt::format("{:%I}", std::chrono::hours(14)));
EXPECT_EQ("12345", fmt::format("{:%j}", days(12345)));
EXPECT_EQ("12345", fmt::format("{:%j}", std::chrono::hours(12345 * 24 + 12)));
EXPECT_EQ("03:25:45",
fmt::format("{:%H:%M:%S}", std::chrono::seconds(12345)));
EXPECT_EQ("03:25", fmt::format("{:%R}", std::chrono::seconds(12345)));