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Add support for time points with arbitrary durations (#2208)

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This commit is contained in:
Victor Zverovich 2021-04-02 11:17:14 -07:00
parent dac42f52b2
commit 06b3a1000c
2 changed files with 20 additions and 14 deletions
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6
include/fmt/chrono.h
View File

@ -401,9 +401,9 @@ inline size_t strftime(wchar_t* str, size_t count, const wchar_t* format,
}
} // namespace detail
template <typename Char>
struct formatter<std::chrono::time_point<std::chrono::system_clock>, Char>
: formatter<std::tm, Char> {
template <typename Char, typename Duration>
struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
Char> : formatter<std::tm, Char> {
template <typename FormatContext>
auto format(std::chrono::time_point<std::chrono::system_clock> val,
FormatContext& ctx) -> decltype(ctx.out()) {

28
test/chrono-test.cc
View File

@ -100,24 +100,30 @@ TEST(TimeTest, FormatTM) {
std::time_t t = std::chrono::system_clock::to_time_t(point);
std::tm tm = *std::localtime(&t);
char strftime_output[256];
std::strftime(strftime_output, sizeof(strftime_output),
"%Y-%m-%d %H:%M:%S", &tm);
std::strftime(strftime_output, sizeof(strftime_output), "%Y-%m-%d %H:%M:%S",
&tm);
EXPECT_EQ(strftime_output, fmt::format("{:%Y-%m-%d %H:%M:%S}", tm));
auto wstrftime_output = std::wstring();
std::copy(strftime_output, strftime_output + strlen(strftime_output),
std::back_inserter(wstrftime_output));
EXPECT_EQ(wstrftime_output,
fmt::format(L"{:%Y-%m-%d %H:%M:%S}", tm));
EXPECT_EQ(wstrftime_output, fmt::format(L"{:%Y-%m-%d %H:%M:%S}", tm));
}
template <typename TimePoint> std::string strftime(TimePoint tp) {
std::time_t t = std::chrono::system_clock::to_time_t(tp);
std::tm tm = *std::localtime(&t);
char output[256];
std::strftime(output, sizeof(output), "%Y-%m-%d %H:%M:%S", &tm);
return output;
}
TEST(TimeTest, TimePoint) {
auto point = std::chrono::system_clock::now();
std::time_t t = std::chrono::system_clock::to_time_t(point);
std::tm tm = *std::localtime(&t);
char strftime_output[256];
std::strftime(strftime_output, sizeof(strftime_output),
"%Y-%m-%d %H:%M:%S", &tm);
EXPECT_EQ(strftime_output, fmt::format("{:%Y-%m-%d %H:%M:%S}", point));
auto t1 = std::chrono::system_clock::now();
EXPECT_EQ(strftime(t1), fmt::format("{:%Y-%m-%d %H:%M:%S}", t1));
using time_point =
std::chrono::time_point<std::chrono::system_clock, std::chrono::seconds>;
auto t2 = time_point(std::chrono::seconds(42));
EXPECT_EQ(strftime(t2), fmt::format("{:%Y-%m-%d %H:%M:%S}", t2));
}
#define EXPECT_TIME(spec, time, duration) \