35 lines
816 B
Rust
35 lines
816 B
Rust
use nom::{
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character::complete::{char, one_of},
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combinator::{map, recognize},
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multi::{many0, many1},
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sequence::{preceded, terminated},
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};
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use crate::parser::{IResult, Span};
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pub fn hexadecimal(input: Span) -> IResult<Span, u64> {
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map(
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preceded(
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char('h'),
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recognize(many1(terminated(
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one_of("0123456789abcdefABCDEF"),
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many0(char('_')),
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))),
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),
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|out: Span| {
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u64::from_str_radix(&str::replace(out.fragment(), "_", ""), 16).expect("error parsing literal")
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},
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)(input)
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_hex() {
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assert_eq!(hexadecimal("hfF".into()).unwrap().1, 0xff);
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assert_eq!(hexadecimal("hF".into()).unwrap().1, 0xf);
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}
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}
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