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Add support for yiled keyword

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This commit is contained in:
Daiki Ihara 2021-01-14 00:01:50 +09:00
parent d9b1fa6da3
commit 85cd3524e2
8 changed files with 95 additions and 27 deletions
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16
crates/parser/src/grammar/expressions/atom.rs
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@ -50,6 +50,7 @@ pub(super) const ATOM_EXPR_FIRST: TokenSet =
T![match],
T![unsafe],
T![return],
T![yield],
T![break],
T![continue],
T![async],
@ -142,6 +143,7 @@ pub(super) fn atom_expr(p: &mut Parser, r: Restrictions) -> Option<(CompletedMar
block_expr_unchecked(p)
}
T![return] => return_expr(p),
T![yield] => yield_expr(p),
T![continue] => continue_expr(p),
T![break] => break_expr(p, r),
_ => {
@ -508,6 +510,20 @@ fn return_expr(p: &mut Parser) -> CompletedMarker {
}
m.complete(p, RETURN_EXPR)
}
// test yield_expr
// fn foo() {
// yield;
// yield 1;
// }
fn yield_expr(p: &mut Parser) -> CompletedMarker {
assert!(p.at(T![yield]));
let m = p.start();
p.bump(T![yield]);
if p.at_ts(EXPR_FIRST) {
expr(p);
}
m.complete(p, YIELD_EXPR)
}
// test continue_expr
// fn foo() {