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// { dg-options "-std=gnu++20" }
// { dg-do run { target c++20 } }
#include <chrono>
#include <sstream>
#include <testsuite_hooks.h>
void
test_ostream()
{
using std::ostringstream;
using namespace std::chrono;
auto t = sys_days{July/1/2015} - 500ms;
auto u = clock_cast<utc_clock>(t);
std::string_view results[] = {
"2015-06-30 23:59:59.500 UTC",
"2015-06-30 23:59:59.750 UTC",
"2015-06-30 23:59:60.000 UTC",
"2015-06-30 23:59:60.250 UTC",
"2015-06-30 23:59:60.500 UTC",
"2015-06-30 23:59:60.750 UTC",
"2015-07-01 00:00:00.000 UTC",
"2015-07-01 00:00:00.250 UTC",
};
for (auto result : results)
{
ostringstream out;
out << u << " UTC";
VERIFY( out.str() == result );
u += 250ms;
}
}
void
test_format()
{
using namespace std::chrono_literals;
std::chrono::utc_time<std::chrono::milliseconds> t(1671470812708ms);
// Every conversion specifier is valid for a utc_time except %q and %Q.
std::string_view specs = "aAbBcCdDeFgGhHIjmMpqQrRSTuUVwWxXyYzZ";
std::string_view badspecs = "qQ";
std::ostringstream ss;
std::wostringstream wss;
const auto& ct = std::use_facet<std::ctype<wchar_t>>(wss.getloc());
for (char c : specs)
{
char fmt[] = { '{', ':', '%', c, '}' };
try
{
ss << std::vformat(std::string_view(fmt, 5),
std::make_format_args(t));
ss << " | ";
// The call above should throw for any conversion-spec in badspecs:
VERIFY(badspecs.find(c) == badspecs.npos);
}
catch (const std::format_error& e)
{
VERIFY(badspecs.find(c) != badspecs.npos);
std::string_view s = e.what();
// Libstdc++-specific message:
VERIFY(s.find("format argument does not contain the information "
"required by the chrono-specs") != s.npos);
}
wchar_t wfmt[] = { L'{', L':', L'%', ct.widen(c), L'}' };
try
{
wss << std::vformat(std::wstring_view(wfmt, 5),
std::make_wformat_args(t));
wss << L" | ";
// The call above should throw for any conversion-spec in badspecs:
VERIFY(badspecs.find(c) == badspecs.npos);
}
catch (const std::format_error& e)
{
VERIFY(badspecs.find(c) != badspecs.npos);
std::string_view s = e.what();
// Libstdc++-specific message:
VERIFY(s.find("format argument does not contain the information "
"required by the chrono-specs") != s.npos);
}
}
std::string s = ss.str();
VERIFY( s == "Mon | Monday | Dec | December | Mon Dec 19 17:26:25.708 2022"
" | 20 | 19 | 12/19/22 | 19 | 2022-12-19 | 22 | 2022 | Dec"
" | 17 | 05 | 353 | 12 | 26 | PM | 05:26:25.708 PM | 17:26"
" | 25.708 | 17:26:25.708 | 1 | 51 | 51 | 1 | 51 | 12/19/22"
" | 17:26:25.708 | 22 | 2022 | +0000 | UTC | " );
std::wstring ws = wss.str();
VERIFY( ws == L"Mon | Monday | Dec | December | Mon Dec 19 17:26:25.708 2022"
" | 20 | 19 | 12/19/22 | 19 | 2022-12-19 | 22 | 2022 | Dec"
" | 17 | 05 | 353 | 12 | 26 | PM | 05:26:25.708 PM | 17:26"
" | 25.708 | 17:26:25.708 | 1 | 51 | 51 | 1 | 51 | 12/19/22"
" | 17:26:25.708 | 22 | 2022 | +0000 | UTC | " );
std::chrono::utc_seconds leap(1483228800s + 26s); // 1 Jan 2017
s = std::format("{:%T}", leap - 1s);
VERIFY( s == "23:59:59" );
s = std::format("{:%T}", leap);
VERIFY( s == "23:59:60" );
s = std::format("{:%T}", leap + 10ms);
VERIFY( s == "23:59:60.010" );
s = std::format("{:%T}", leap + 1s);
VERIFY( s == "00:00:00" );
}
int main()
{
test_ostream();
test_format();
}
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