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Add while-loop parsing

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Vili Sinervä 2025-01-31 20:08:24 +02:00
parent eb44a88121
commit d72fd82c7b
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1 changed files with 10 additions and 0 deletions
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10
src/compiler/parser/mod.rs
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@ -105,6 +105,7 @@ fn parse_term<'source>(pos: &mut usize, tokens: &[Token<'source>]) -> Expression
TokenType::Integer => parse_int_literal(pos, tokens),
TokenType::Identifier => match token.text {
"if" => parse_conditional(pos, tokens),
"while" => parse_while_loop(pos, tokens),
"true" | "false" => parse_bool_literal(pos, tokens),
"var" => panic!("Invalid variable declaration {}", token),
_ => {
@ -152,6 +153,15 @@ fn parse_conditional<'source>(pos: &mut usize, tokens: &[Token<'source>]) -> Exp
Conditional(start.loc, condition, then_expr, else_expr)
}
fn parse_while_loop<'source>(pos: &mut usize, tokens: &[Token<'source>]) -> Expression<'source> {
let start = consume_string(pos, tokens, "while");
let condition = Box::new(parse_expression(0, pos, tokens));
consume_string(pos, tokens, "do");
let do_expr = Box::new(parse_expression(0, pos, tokens));
While(start.loc, condition, do_expr)
}
fn parse_parenthesized<'source>(pos: &mut usize, tokens: &[Token<'source>]) -> Expression<'source> {
consume_string(pos, tokens, "(");
let expression = parse_expression(0, pos, tokens);