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
35
36
37
38
39
40
41
42
43
44
45
46

use nom::{
    bytes::complete::tag,
    character::complete::{char, digit1},
    combinator::{map_res, opt, recognize},
    sequence::tuple,
    IResult,
};
use std::str::FromStr;
#[cfg(test)]
mod tests;

/// `\d+`
pub fn parse_integer<T>(input: &str) -> IResult<&str, T>
where
    T: FromStr,
{
    map_res(recognize(digit1), str::parse)(input)
}

pub fn parse_i_px_maybe<T>(input: &str) -> IResult<&str, T>
where
    T: FromStr,
{
    let (rest, (i, _)) = tuple((parse_integer, opt(tag("px"))))(input)?;
    Ok((rest, i))
}

/// `\d+\.\d+`
pub fn parse_f32(input: &str) -> IResult<&str, f32> {
    let float1 = tuple((digit1, opt(tuple((tag("."), digit1)))));
    map_res(recognize(float1), str::parse)(input)
}

pub fn parse_f_percent(input: &str) -> IResult<&str, f32> {
    let (rest, (f, _)) = tuple((parse_f32, char('%')))(input)?;
    Ok((rest, f))
}

/// `\d+\/\d+`
pub fn parse_fraction(input: &str) -> IResult<&str, (usize, usize)> {
    let (rest, (a, _, b)) = tuple((parse_integer, tag("/"), parse_integer))(input)?;
    Ok((rest, (a, b)))
}

/// #50d71e
pub fn parser_color_hex() {}