magc 0.8.0

The Mag Language Compiler
Documentation 
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//! Parse a named pattern and return it as a single entry of a key-value association.

use crate::parser::{Parser, ParserResult, PrefixParselet};

use crate::types::{Expression, ExpressionKind, Token, TokenKind};

#[derive(Debug, Clone)]
/// Parse a list of expressions enclosed in brackets, like `[1, 2, 3]`.
pub struct ListParselet;

impl PrefixParselet for ListParselet {
    fn parse(&self, parser: &mut Parser, _token: Token) -> ParserResult {
        let kind;

        if parser.peek()?.kind == TokenKind::RightBracket {
            kind = ExpressionKind::List(None);
        } else {
            kind = ExpressionKind::List(Some(Box::new(parser.parse_expression(0)?)));
        }

        parser.consume_expect(TokenKind::RightBracket)?;

        Ok(Expression {
            kind,
            start_pos: 0,
            end_pos: 0,
        })
    }
}