[Bug libstdc++/45896] [C++0x] Facet time_get not reading dates according to the IEEE 1003 standard.

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45896
Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2010-10-05 17:57:04         |2019-3-20
           Severity|enhancement                 |normal

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Testcase from PR 89778:

#include <ctime>
#include <string>
#include <iomanip>
#include <sstream>
#include <iostream>

void printDate( const std::string &date_string ) {
  std::istringstream is( date_string );
  std::tm tm{};
  static const char *date_format( "%Y/%b/%d" );
  // d : parses the day of the month as a decimal number 
  //     (range [01,31]), leading zeroes permitted but not required 
  is >> std::get_time( &tm, date_format );
  char buf[ 20 ];
  std::strftime( buf, 20, date_format, &tm );
  std::cout << buf << '\n';
}

int main() {
  printDate( "2019/Apr/09" );
  printDate( "2019/Apr/9" );
  std::cout << '\n';
  printDate( "2017/Jan/02" );
  printDate( "2017/Jan/2" );
  std::cout << '\n';
  printDate( "2018/Dec/07" );
  printDate( "2018/Dec/7" );
}