intuicio_parser/
literal.rs

1use crate::{ParseResult, Parser, ParserExt, ParserHandle, ParserOutput, ParserRegistry};
2use std::borrow::Cow;
3
4pub mod shorthand {
5    use super::*;
6
7    pub fn lit(value: impl Into<Cow<'static, str>>) -> ParserHandle {
8        LiteralParser::new(value).into_handle()
9    }
10}
11
12#[derive(Clone)]
13pub struct LiteralParser {
14    literal: Cow<'static, str>,
15}
16
17impl LiteralParser {
18    pub fn new(value: impl Into<Cow<'static, str>>) -> Self {
19        Self {
20            literal: value.into(),
21        }
22    }
23}
24
25impl Parser for LiteralParser {
26    fn parse<'a>(&self, _: &ParserRegistry, input: &'a str) -> ParseResult<'a> {
27        if input.starts_with(&*self.literal) {
28            Ok((
29                &input[self.literal.len()..],
30                ParserOutput::new(self.literal.to_string()).ok().unwrap(),
31            ))
32        } else {
33            Err(format!("Expected '{}'", self.literal).into())
34        }
35    }
36}
37
38#[cfg(test)]
39mod tests {
40    use crate::{literal::LiteralParser, shorthand::lit, ParserRegistry};
41
42    fn is_async<T: Send + Sync>() {}
43
44    #[test]
45    fn test_literal() {
46        is_async::<LiteralParser>();
47
48        let registry = ParserRegistry::default();
49        let keyword = lit("foo");
50        let (rest, result) = keyword.parse(&registry, "foo bar").unwrap();
51        assert_eq!(rest, " bar");
52        let result = result.consume::<String>().ok().unwrap();
53        assert_eq!(result.as_str(), "foo");
54    }
55}
intuicio_parser/literal.rs

intuicio_parser/
literal.rs
