121 lines
2.3 KiB
Rust
121 lines
2.3 KiB
Rust
use nom::
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{
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IResult,
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branch::alt,
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bytes::complete::tag,
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character::complete::digit1,
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combinator::{map, map_res, opt, recognize},
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sequence::{pair, terminated},
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};
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use super::word_boundary;
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fn true_(i: &str) -> IResult<&str, bool>
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{
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map
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(
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terminated
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(
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tag("true"),
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word_boundary,
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),
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|_| true,
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)(i)
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}
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fn false_(i: &str) -> IResult<&str, bool>
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{
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map
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(
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terminated
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(
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tag("false"),
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word_boundary,
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),
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|_| false,
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)(i)
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}
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pub fn boolean(i: &str) -> IResult<&str, bool>
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{
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alt
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((
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true_,
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false_,
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))(i)
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}
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pub fn integer(i: &str) -> IResult<&str, i32>
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{
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map_res
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(
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recognize
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(
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terminated
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(
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pair
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(
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opt
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(
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alt
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((
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tag("-"),
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tag("+"),
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))
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),
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digit1,
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),
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word_boundary,
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)
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),
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std::str::FromStr::from_str,
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)(i)
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}
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#[cfg(test)]
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mod tests
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{
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use crate::parse::*;
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#[test]
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fn parse_boolean()
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{
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assert_eq!(boolean("true"), Ok(("", true)));
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assert_eq!(boolean("false"), Ok(("", false)));
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assert_eq!(boolean("true false"), Ok((" false", true)));
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assert_eq!(boolean("false true"), Ok((" true", false)));
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assert_eq!(boolean("true,"), Ok((",", true)));
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assert_eq!(boolean("false,"), Ok((",", false)));
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assert!(boolean("truefalse").is_err());
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assert!(boolean("falsetrue").is_err());
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assert!(boolean("truea").is_err());
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assert!(boolean("falsea").is_err());
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assert!(boolean("a").is_err());
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assert!(boolean("-").is_err());
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assert!(boolean(" ").is_err());
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}
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#[test]
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fn parse_integer()
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{
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assert_eq!(integer("0"), Ok(("", 0)));
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assert_eq!(integer("10000"), Ok(("", 10000)));
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assert_eq!(integer("+10000"), Ok(("", 10000)));
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assert_eq!(integer("-10000"), Ok(("", -10000)));
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assert_eq!(integer("0 42"), Ok((" 42", 0)));
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assert_eq!(integer("10000 42"), Ok((" 42", 10000)));
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assert_eq!(integer("+10000 42"), Ok((" 42", 10000)));
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assert_eq!(integer("-10000 42"), Ok((" 42", -10000)));
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assert_eq!(integer("10000,"), Ok((",", 10000)));
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assert_eq!(integer("+10000,"), Ok((",", 10000)));
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assert_eq!(integer("-10000,"), Ok((",", -10000)));
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assert!(integer("10000a").is_err());
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assert!(integer("+10000a").is_err());
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assert!(integer("-10000a").is_err());
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assert!(integer("1.5").is_err());
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assert!(integer("a").is_err());
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assert!(integer("-").is_err());
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assert!(integer(" ").is_err());
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}
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}
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