libstdc++-v3/testsuite/std/time/month_day/io.cc

// { dg-do run { target c++20 } }
// { dg-require-namedlocale "fr_FR.ISO8859-15" }
// { dg-timeout-factor 2 }

#include <chrono>
#include <sstream>
#include <testsuite_hooks.h>

void
test_ostream()
{
  using std::ostringstream;
  using namespace std::chrono;

  ostringstream ss;
  ss << January/14 << ' ' << February/30 << ' ' << March/34;
  VERIFY( ss.str() == "Jan/14 Feb/30 Mar/34 is not a valid day" );

  ss.str("");
  ss.imbue(std::locale(ISO_8859(15,fr_FR)));
  ss << July/27;
  VERIFY( ss.str() == "juil./27" );
}

void
test_format()
{
  using namespace std::chrono;
  std::locale loc_fr(ISO_8859(15,fr_FR));

  auto s = std::format("{:%b%%%B%t%m%n %d%%%e}", month(1)/day(3));
  VERIFY( s == "Jan%January\t01\n 03% 3" );
  s = std::format(loc_fr, "{:L%b%%%B%t%m%n %d%%%e}", month(1)/day(3));
  VERIFY( s == "janv.%janvier\t01\n 03% 3");

  s = std::format("{0:%m/%d} {0}", month(10)/day(13));
  VERIFY( s == "10/13 Oct/13" );
  s = std::format("{0:%m/%d} {0}", month(13)/day(34));
  VERIFY( s == "13/34 13 is not a valid month/34 is not a valid day" );

  std::string_view specs = "aAbBcCdDeFgGhHIjmMpqQrRSTuUVwWxXyYzZ";
  std::string_view my_specs = "bBdehm";
  for (char c : specs)
  {
    char fmt[] = { '{', ':', '%', c, '}' };
    try
    {
      auto md = month(1)/day(10);
      (void) std::vformat(std::string_view(fmt, 5), std::make_format_args(md));
      // The call above should throw for any conversion-spec not in my_specs:
      VERIFY(my_specs.find(c) != my_specs.npos);
    }
    catch (const std::format_error& e)
    {
      VERIFY(my_specs.find(c) == my_specs.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);
    }
  }
}

void
test_parse()
{
  using namespace std::chrono;
  std::istringstream is;
  month_day md{};

  is.str("jul 0123");
  VERIFY( is >> parse("%B %3e", md) );
  VERIFY( ! is.eof() );
  VERIFY( is.peek() == '3' );
  VERIFY( md == July/12 );

  is.str("August 11");
  VERIFY( is >> parse("%b %d", md) );
  VERIFY( ! is.eof() );
  VERIFY( md == August/11 );

  is.clear();
  is.str("012");
  VERIFY( is >> parse("%m%2d", md) );
  VERIFY( is.eof() );
  VERIFY( md == January/2 );

  is.clear();
  is.str("012/311");
  VERIFY( is >> parse("%4m/%d", md) );
  VERIFY( ! is.eof() );
  VERIFY( md == December/31 );

  is.clear();
  is.str("2023-7-31");
  VERIFY( is >> parse("%F", md) );
  VERIFY( ! is.eof() );
  VERIFY( md == July/31 );

  md = month(13)/day(32);
  is.clear();
  is.str("2023-13-1");
  VERIFY( ! (is >> parse("%F", md)) );
  VERIFY( is.eof() );
  VERIFY( md == month(13)/day(32) );

  md = month(13)/day(33);
  is.clear();
  is.str("2023-6-31");
  VERIFY( ! (is >> parse("%F", md)) ); // June only has 30 days.
  VERIFY( ! is.eof() );
  VERIFY( md == month(13)/day(33) );

  md = month(13)/day(34);
  is.clear();
  is.str("6-31");
  VERIFY( ! (is >> parse("%m-%d", md)) ); // June only has 30 days in any year.
  VERIFY( ! is.eof() );
  VERIFY( md == month(13)/day(34) );

  md = month(13)/day(35);
  is.clear();
  is.str("2023-2-29");
  VERIFY( ! (is >> parse("%Y-%m-%e", md)) ); // Feb only has 28 days in 2023.
  VERIFY( ! is.eof() );
  VERIFY( md == month(13)/day(35) );

  is.clear();
  is.str("2-29");
  VERIFY( is >> parse("%m-%d", md) ); // But Feb has 29 days in some years.
  VERIFY( ! is.eof() );
  VERIFY( md == February/29 );

  is.clear();
  is.str("2023-W32-5");
  VERIFY( is >> parse("%G-W%V-%u", md) );
  VERIFY( ! is.eof() );
  VERIFY( md == August/11 );
}

int main()
{
  test_ostream();
  test_format();
  test_parse();
}