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Merge #4225

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4225: Special-case try macro_rules r=matklad a=edwin0cheng

Similar to #4221, but for `macro_rules! try {}`

Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
This commit is contained in:
bors[bot] 2020-04-30 17:11:18 +00:00 committed by GitHub
commit 861652ffa6
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3 changed files with 39 additions and 0 deletions
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11
crates/ra_parser/src/grammar/items.rs
View file

@ -415,6 +415,17 @@ pub(super) fn macro_call_after_excl(p: &mut Parser) -> BlockLike {
if p.at(IDENT) {
name(p);
}
// Special-case `macro_rules! try`.
// This is a hack until we do proper edition support
// test try_macro_rules
// macro_rules! try { () => {} }
if p.at(T![try]) {
let m = p.start();
p.bump_remap(IDENT);
m.complete(p, NAME);
}
match p.current() {
T!['{'] => {
token_tree(p);

27
crates/ra_syntax/test_data/parser/inline/ok/0160_try_macro_rules.rast Normal file
View file

@ -0,0 +1,27 @@
SOURCE_FILE@0..30
MACRO_CALL@0..29
PATH@0..11
PATH_SEGMENT@0..11
NAME_REF@0..11
IDENT@0..11 "macro_rules"
BANG@11..12 "!"
WHITESPACE@12..13 " "
NAME@13..16
IDENT@13..16 "try"
WHITESPACE@16..17 " "
TOKEN_TREE@17..29
L_CURLY@17..18 "{"
WHITESPACE@18..19 " "
TOKEN_TREE@19..21
L_PAREN@19..20 "("
R_PAREN@20..21 ")"
WHITESPACE@21..22 " "
EQ@22..23 "="
R_ANGLE@23..24 ">"
WHITESPACE@24..25 " "
TOKEN_TREE@25..27
L_CURLY@25..26 "{"
R_CURLY@26..27 "}"
WHITESPACE@27..28 " "
R_CURLY@28..29 "}"
WHITESPACE@29..30 "\n"

1
crates/ra_syntax/test_data/parser/inline/ok/0160_try_macro_rules.rs Normal file
View file

@ -0,0 +1 @@
macro_rules! try { () => {} }