wright/parser/
identifier.rs

1//! Parsing implementation for [Identifier].
2
3use super::{
4    Parser,
5    error::{ParserError, ParserErrorKind},
6};
7use crate::{ast::identifier::Identifier, lexer::token::TokenTy};
8
9impl Identifier {
10    /// Parse an [Identifier] from a [Parser]. Leave the [Parser] unadvanced otherwise.
11    pub fn parse(parser: &mut Parser) -> Result<Self, ParserError> {
12        parser
13            .next_if_is(TokenTy::Identifier)
14            .map(|token| Identifier {
15                fragment: token.fragment,
16            })
17            .ok_or_else(|| {
18                ParserErrorKind::ExpectedIdentifier.at(parser.peek_fragment_or_rest_cloned())
19            })
20    }
21}
22
23#[cfg(test)]
24mod tests {
25    use crate::{
26        ast::identifier::Identifier,
27        lexer::Lexer,
28        parser::{Parser, error::ParserErrorKind},
29    };
30
31    #[test]
32    fn test_parse_ident() {
33        let mut parser = Parser::new(Lexer::new_test("source"));
34        let ident = Identifier::parse(&mut parser).unwrap();
35        assert_eq!(ident.fragment.as_str(), "source");
36        assert_eq!(parser.lexer().remaining.len(), 0);
37    }
38
39    #[test]
40    fn test_parse_ident_fail() {
41        for fail in ["12", "+", " ", " test", "_", "record"] {
42            let mut parser = Parser::new(Lexer::new_test(&fail));
43            let error = Identifier::parse(&mut parser).unwrap_err();
44            assert_eq!(error.kind, ParserErrorKind::ExpectedIdentifier);
45        }
46    }
47}
wright/parser/identifier.rs

wright/parser/
identifier.rs
