bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/parser/src/grammar.rs')
-rw-r--r--crates/parser/src/grammar.rs30
1 files changed, 30 insertions, 0 deletions
diff --git a/crates/parser/src/grammar.rs b/crates/parser/src/grammar.rs
index 485b612f08..15ec9e167e 100644
--- a/crates/parser/src/grammar.rs
+++ b/crates/parser/src/grammar.rs
@@ -200,6 +200,8 @@ impl BlockLike {
}
}
+const VISIBILITY_FIRST: TokenSet = TokenSet::new(&[T![pub], T![crate]]);
+
fn opt_visibility(p: &mut Parser<'_>, in_tuple_field: bool) -> bool {
match p.current() {
T![pub] => {
@@ -340,3 +342,31 @@ fn error_block(p: &mut Parser<'_>, message: &str) {
p.eat(T!['}']);
m.complete(p, ERROR);
}
+
+/// The `parser` passed this is required to at least consume one token if it returns `true`.
+/// If the `parser` returns false, parsing will stop.
+fn delimited(
+ p: &mut Parser<'_>,
+ bra: SyntaxKind,
+ ket: SyntaxKind,
+ delim: SyntaxKind,
+ first_set: TokenSet,
+ mut parser: impl FnMut(&mut Parser<'_>) -> bool,
+) {
+ p.bump(bra);
+ while !p.at(ket) && !p.at(EOF) {
+ if !parser(p) {
+ break;
+ }
+ if !p.at(delim) {
+ if p.at_ts(first_set) {
+ p.error(format!("expected {:?}", delim));
+ } else {
+ break;
+ }
+ } else {
+ p.bump(delim);
+ }
+ }
+ p.expect(ket);
+}