gmaps_static/
marker_label.rs

1use std::fmt;
2use std::ops::RangeInclusive;
3use std::str::FromStr;
4
5#[derive(Clone)]
6pub struct MarkerLabel(char);
7
8impl MarkerLabel {
9    pub fn new(label: char) -> Result<Self, String> {
10        let label = label.to_ascii_uppercase();
11        if RangeInclusive::new('A', 'Z').contains(&label)
12            || RangeInclusive::new('0', '9').contains(&label)
13        {
14            return Ok(MarkerLabel(label));
15        }
16
17        Err(format!(
18            "Invalid Label '{}'. Only a char matching [A-Z0-9] is accepted",
19            label
20        ))
21    }
22}
23
24impl FromStr for MarkerLabel {
25    type Err = String;
26
27    fn from_str(label: &str) -> Result<Self, Self::Err> {
28        if label.len() != 1 {
29            return Err(format!(
30                "Invalid label '{}'. Only a string made of a char matching [A-Z0-9] is accepted",
31                label
32            ));
33        }
34
35        MarkerLabel::new(label.chars().next().unwrap())
36    }
37}
38
39impl From<char> for MarkerLabel {
40    fn from(c: char) -> Self {
41        MarkerLabel::new(c).unwrap()
42    }
43}
44
45impl fmt::Display for MarkerLabel {
46    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
47        write!(f, "{}", self.0)
48    }
49}
gmaps_static/marker_label.rs

gmaps_static/
marker_label.rs
