[Cppcms-users] booster::date_time parsing

[Pavel K. <un...@fu...>]

hello Artyom,

first of all, great work ;). combination your framework together with mongodb 
and graphicsmagick is amazingly _fast_ and pleasure to use.

i have 2 questions about booster::date_time / timezone:

1) should parsing handle time before unix era (1970...)? example:

	std::string tz = "Europe/Prague";
	booster::locale::calendar cal( context().locale(), tz );
	booster::locale::date_time dt( cal );

	std::stringstream ss;
	ss.imbue( cal.get_locale() );

	ss << "1955-07-21 07:21:07";	// produce 1969-01-01 01:00:00
	//ss << "1985-07-21 07:21:07";	// works as expected

	ss >> booster::locale::as::ftime( "%Y-%m-%d %H:%M:%S" ) >> dt;
	std::cout.imbue( cal.get_locale() );
	std::cout << booster::locale::as::ftime( "%Y-%m-%d %H:%M:%S" ) << dt << 
std::endl;

	booster::locale::date_time dt2( cal );
	dt2 -= 50 * booster::locale::period::year;	// works as expected
 	// 1961-03-16 ...
	std::cout << booster::locale::as::ftime( "%Y-%m-%d %H:%M:%S" ) << dt2 << 
std::endl;

2) is there a way how to obtain all available timezones? currenty i use  
icu::TimeZone::createEnumeration() directly.

pavel _ uni.