pizarra 3.0.1

The backend for a simple vector hand-drawing application
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

use std::str::FromStr;

use lazy_static::lazy_static;
use regex::Regex;

use crate::geom::Angle;

use super::Error;

lazy_static! {
    static ref POINT_REGEX: Regex = Regex::new(r"(?x)
        (?P<x>-?\d+(\.\d+)?)
        \s+
        (?P<y>-?\d+(\.\d+)?)
    ").unwrap();
    static ref ANGLE_REGEX: Regex = Regex::new(r"(?x)
        rotate\(
            (?P<angle>-?\d+(\.\d*)?)
            (\s+(-?\d+(\.\d*)?)\s+(-?\d+(\.\d*)?))?
        \)
    ").unwrap();
}

impl FromStr for Angle {
    type Err = Error;

    fn from_str(s: &str) -> Result<Angle, Error> {
        if let Some(angle) = ANGLE_REGEX.captures(s) {
            Ok(Angle::from_degrees(angle["angle"].parse().map_err(|_| Error::AngleDoesntMatchRegex(s.into()))?))
        } else {
            Err(Error::AngleDoesntMatchRegex(s.into()))
        }
    }
}