lisette_syntax/parse/
directives.rs

1use super::Parser;
2use crate::ast::{Expression, Literal};
3use crate::lex::TokenKind::*;
4use crate::types::Type;
5
6impl<'source> Parser<'source> {
7    pub fn parse_directive(&mut self) -> Expression {
8        let start = self.current_token();
9        let directive_name = start.text.strip_prefix('@').unwrap_or(start.text);
10
11        match directive_name {
12            "rawgo" => self.parse_rawgo_directive(),
13            _ => {
14                self.track_error("unknown directive", "There is no such directive.");
15                self.next();
16                if self.is(LeftParen) {
17                    self.collect_delimited_expressions(LeftParen, RightParen);
18                }
19                Expression::Unit {
20                    ty: Type::uninferred(),
21                    span: self.span_from_tokens(start),
22                }
23            }
24        }
25    }
26
27    fn parse_rawgo_directive(&mut self) -> Expression {
28        self.ensure(Directive);
29
30        let (args, _) = self.collect_delimited_expressions(LeftParen, RightParen);
31
32        let text = match args.into_iter().next() {
33            Some(Expression::Literal {
34                literal: Literal::String(s),
35                ..
36            }) => s,
37
38            _ => {
39                self.track_error("invalid call to rawgo", "Use `@rawgo(\"go code\")`.");
40                "?".to_string()
41            }
42        };
43
44        Expression::RawGo { text }
45    }
46}
lisette_syntax/parse/directives.rs

lisette_syntax/parse/
directives.rs
