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
use nom::{bytes::complete::tag, combinator::value, IResult};
pub fn true_parser(input: &str) -> IResult<&str, bool> {
value(true, tag("true"))(input)
}
pub fn false_parser(input: &str) -> IResult<&str, bool> {
value(false, tag("false"))(input)
}
#[cfg(test)]
mod tests {
use nom::error::{Error, ErrorKind};
use nom::Err;
use super::*;
#[test]
fn pass_true() {
assert_eq!(true_parser("true false"), Ok((" false", true)));
}
#[test]
fn failed_true() {
assert_eq!(
true_parser("false"),
Err(Err::Error(Error::new("false", ErrorKind::Tag)))
);
}
#[test]
fn pass_false() {
assert_eq!(false_parser("false true"), Ok((" true", false)));
}
#[test]
fn failed_false() {
assert_eq!(
false_parser("true"),
Err(Err::Error(Error::new("true", ErrorKind::Tag)))
);
}
}