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internal: Parse const trait bounds

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This commit is contained in:
Lukas Wirth 2021-10-19 14:15:47 +02:00
parent 401daa5f77
commit b219a4c465
8 changed files with 45 additions and 19 deletions
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22
crates/parser/src/grammar/generic_params.rs
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@ -100,7 +100,7 @@ fn lifetime_bounds(p: &mut Parser) {
}
// test type_param_bounds
// struct S<T: 'a + ?Sized + (Copy)>;
// struct S<T: 'a + ?Sized + (Copy) + ~const Drop>;
pub(super) fn bounds(p: &mut Parser) {
assert!(p.at(T![:]));
p.bump(T![:]);
@ -124,14 +124,24 @@ pub(super) fn bounds_without_colon_m(p: &mut Parser, marker: Marker) -> Complete
fn type_bound(p: &mut Parser) -> bool {
let m = p.start();
let has_paren = p.eat(T!['(']);
p.eat(T![?]);
match p.current() {
LIFETIME_IDENT => lifetime(p),
T![for] => types::for_type(p, false),
_ if paths::is_use_path_start(p) => types::path_type_(p, false),
_ => {
m.abandon(p);
return false;
current => {
match current {
T![?] => p.bump_any(),
T![~] => {
p.bump_any();
p.expect(T![const]);
}
_ => (),
}
if paths::is_use_path_start(p) {
types::path_type_(p, false);
} else {
m.abandon(p);
return false;
}
}
}
if has_paren {