use std::ops::{Rem, AddAssign};
pub fn get_days_of_month<T: Rem>(year: T, month: u32) -> u32 {
match month {
2 => if is_leap_year(year) { 29 } else { 28 },
4 | 6 | 9 | 11 => 30,
_ => 31,
}
}
pub fn is_leap_year<T: Rem>(year: T) -> bool {
match ((year % 100 as T) as i32, (year % 400 as T) as i32) {
(_, 0) => true,
(0, _) => false,
_ => year % 4 == 0,
}
}
pub fn next_day<N, T: AddAssign + Rem>(mut year: T, mut month: u32, mut day: u32) -> (T, u32, u32) {
let days_of_month = get_days_of_month(year, month);
day += 1;
if day > days_of_month {
month += 1;
day = 1;
}
if month > 12 {
year += 1;
month = 1;
}
(year, month, day)
}
non-primitive castエラーが出るんだけどどうすれば解決できる？
1 as Tでもできないし、1.parse()はstrじゃないから出来ない