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Auto merge of #12444 - XFFXFF:fix_12442, r=Veykril

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fix: parsing of `?` opt-out trait bounds

fixes #12442
This commit is contained in:
bors 2022-06-02 14:02:36 +00:00
commit 88024c7ec2
3 changed files with 54 additions and 0 deletions
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6
crates/parser/src/grammar/generic_params.rs
View file

@ -133,6 +133,12 @@ fn type_bound(p: &mut Parser) -> bool {
match p.current() {
LIFETIME_IDENT => lifetime(p),
T![for] => types::for_type(p, false),
T![?] if p.nth_at(1, T![for]) => {
// test question_for_type_trait_bound
// fn f<T>() where T: ?for<> Sized {}
p.bump_any();
types::for_type(p, false)
}
current => {
match current {
T![?] => p.bump_any(),

47
crates/parser/test_data/parser/inline/ok/0201_question_for_type_trait_bound.rast Normal file
View file

@ -0,0 +1,47 @@
SOURCE_FILE
FN
FN_KW "fn"
WHITESPACE " "
NAME
IDENT "f"
GENERIC_PARAM_LIST
L_ANGLE "<"
TYPE_PARAM
NAME
IDENT "T"
R_ANGLE ">"
PARAM_LIST
L_PAREN "("
R_PAREN ")"
WHITESPACE " "
WHERE_CLAUSE
WHERE_KW "where"
WHITESPACE " "
WHERE_PRED
PATH_TYPE
PATH
PATH_SEGMENT
NAME_REF
IDENT "T"
COLON ":"
WHITESPACE " "
TYPE_BOUND_LIST
TYPE_BOUND
QUESTION "?"
FOR_TYPE
FOR_KW "for"
GENERIC_PARAM_LIST
L_ANGLE "<"
R_ANGLE ">"
WHITESPACE " "
PATH_TYPE
PATH
PATH_SEGMENT
NAME_REF
IDENT "Sized"
WHITESPACE " "
BLOCK_EXPR
STMT_LIST
L_CURLY "{"
R_CURLY "}"
WHITESPACE "\n"

1
crates/parser/test_data/parser/inline/ok/0201_question_for_type_trait_bound.rs Normal file
View file

@ -0,0 +1 @@
fn f<T>() where T: ?for<> Sized {}