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Special-case try macro to better support 2015 edition

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This commit is contained in:
Aleksey Kladov
2020-04-30 14:17:14 +02:00
parent 36775ef0d0
commit c51c8bfb84
3 changed files with 52 additions and 0 deletions
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16
crates/ra_parser/src/grammar/expressions/atom.rs
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@@ -535,6 +535,22 @@ fn break_expr(p: &mut Parser, r: Restrictions) -> CompletedMarker {
fn try_block_expr(p: &mut Parser, m: Option<Marker>) -> CompletedMarker {
assert!(p.at(T![try]));
let m = m.unwrap_or_else(|| p.start());
// Special-case `try!` as macro.
// This is a hack until we do proper edition support
if p.nth_at(1, T![!]) {
// test try_macro_fallback
// fn foo() { try!(Ok(())); }
let path = p.start();
let path_segment = p.start();
let name_ref = p.start();
p.bump_remap(IDENT);
name_ref.complete(p, NAME_REF);
path_segment.complete(p, PATH_SEGMENT);
path.complete(p, PATH);
let _block_like = items::macro_call_after_excl(p);
return m.complete(p, MACRO_CALL);
}
p.bump(T![try]);
block(p);
m.complete(p, TRY_EXPR)