parse string to std::time::Duration

Parse string to Duration . The String value unit support for one of:[y,mon,w,d,h,m,s]

• y:Year. Support string value: ["y" | "year" | "Y" | "YEAR" | "Year"]. e.g. 1y
• mon:Month.Support string value:` ["mon" | "MON" | "Month" | "month" | "MONTH"]. e.g. 1mon
• w:Week.Support string value: ["w" | "W" | "Week" | "WEEK" | "week"]. e.g. 1w
• d:Day.Support string value: ["d" | "D" | "Day" | "DAY" | "day"]. e.g. 1d
• h:Hour.Support string value: ["h" | "H" | "Hour" | "HOUR" | "hour"]. e.g. 1h
• m:Minute.Support string value: ["m" | "M" | "Minute" | "MINUTE" | "minute"]. e.g. 1m
• m:Second.Support string value: ["s" | "S" | "Second" | "SECOND" | "second"]. e.g. 1s

Also,duration_str support time duration simple evaluation(+,*). See example:

example

[dependencies]
duration-str = "0.1" 

use duration_str::parse;
use std::time::Duration;

fn main() {
    let duration = parse("1d").unwrap();
    assert_eq!(duration,Duration::new(24*60*60,0));

    let duration = parse("3m+31").unwrap();
    assert_eq!(duration,Duration::new(211,0));

    let duration = parse("3m + 31").unwrap();
    assert_eq!(duration,Duration::new(211,0));

    let duration = parse("1m*10").unwrap();
    assert_eq!(duration,Duration::new(600,0));

    let duration = parse("1m * 10").unwrap();
    assert_eq!(duration,Duration::new(600,0));
}