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Merge #3127

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3127: Support unnamed arguments in function pointers r=edwin0cheng a=hanmertens

Fixes #3089

Co-authored-by: Han Mertens <hanmertens@outlook.com>
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bors[bot] 2020-02-12 22:26:35 +00:00 committed by GitHub
commit 5e464d058b
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3 changed files with 31 additions and 1 deletions
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5
crates/ra_parser/src/grammar/params.rs
View file

@ -114,8 +114,11 @@ fn value_parameter(p: &mut Parser, flavor: Flavor) {
// test fn_pointer_param_ident_path
// type Foo = fn(Bar::Baz);
// type Qux = fn(baz: Bar::Baz);
// test fn_pointer_unnamed_arg
// type Foo = fn(_: bar);
Flavor::FnPointer => {
if p.at(IDENT) && p.nth(1) == T![:] && !p.nth_at(1, T![::]) {
if (p.at(IDENT) || p.at(UNDERSCORE)) && p.nth(1) == T![:] && !p.nth_at(1, T![::]) {
patterns::pattern_single(p);
types::ascription(p);
} else {

1
crates/ra_syntax/test_data/parser/inline/ok/0157_fn_pointer_unnamed_arg.rs Normal file
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@ -0,0 +1 @@
type Foo = fn(_: bar);

26
crates/ra_syntax/test_data/parser/inline/ok/0157_fn_pointer_unnamed_arg.txt Normal file
View file

@ -0,0 +1,26 @@
SOURCE_FILE@[0; 23)
TYPE_ALIAS_DEF@[0; 22)
TYPE_KW@[0; 4) "type"
WHITESPACE@[4; 5) " "
NAME@[5; 8)
IDENT@[5; 8) "Foo"
WHITESPACE@[8; 9) " "
EQ@[9; 10) "="
WHITESPACE@[10; 11) " "
FN_POINTER_TYPE@[11; 21)
FN_KW@[11; 13) "fn"
PARAM_LIST@[13; 21)
L_PAREN@[13; 14) "("
PARAM@[14; 20)
PLACEHOLDER_PAT@[14; 15)
UNDERSCORE@[14; 15) "_"
COLON@[15; 16) ":"
WHITESPACE@[16; 17) " "
PATH_TYPE@[17; 20)
PATH@[17; 20)
PATH_SEGMENT@[17; 20)
NAME_REF@[17; 20)
IDENT@[17; 20) "bar"
R_PAREN@[20; 21) ")"
SEMI@[21; 22) ";"
WHITESPACE@[22; 23) "\n"