std::basic_ios<CharT,Traits>::narrow
Min standard notice:
Converts a current locale-specific character c to its standard equivalent. The result is converted from char_type to char if needed. If no conversion can be performed, the function returns dfault.
# Declarations
char narrow( char_type c, char dfault ) const;
# Parameters
c: character to convertdfault: character to return if the conversion was unsuccessful
# Return value
Character converted to its standard equivalent and then to char. dfault is returned if the conversion fails.