pug で年月日できる mixin

mixin_year_month_day.pug

//- +year_month_day(ture || false, start_year, end_year)
mixin year_month_day(required, start_year, end_year)
	select(name='year', required=required)
		option(value='', selected='selected') -
		- var y = start_year
		while y <= end_year
			option(value=y + '年')=y++ + '年'
	select(name='month', required=required)
		option(value='', selected='selected') -
		- var m = 1
		while m <= 12
			option(value=m + '月')=m++ + '月'
	select(name='day', required=required)
		option(value='', selected='selected') -
		- var d = 1
		while d <= 31
			option(value=d + '日')=d++ + '日'