Remove high-order bits from attributes

1 files changed, 23 insertions, 0 deletions

diff --git a/src/parser/event_parser/parser.rs b/src/parser/event_parser/parser.rs
index 2bc9dd34f..2cbe370be 100644
--- a/src/parser/event_parser/parser.rs
+++ b/src/parser/event_parser/parser.rs
@@ -67,6 +67,29 @@ impl CompleteMarker {
     }
 }
 
+pub(crate) struct TokenSet {
+    pub tokens: &'static [SyntaxKind]
+}
+
+impl TokenSet {
+    pub fn contains(&self, kind: SyntaxKind) -> bool {
+        self.tokens.contains(&kind)
+    }
+}
+
+#[macro_export]
+macro_rules! token_set {
+    ($($t:ident),*) => {
+        TokenSet {
+            tokens: &[$($t),*],
+        }
+    };
+
+    ($($t:ident),* ,) => {
+        token_set!($($t),*)
+    };
+}
+
 
 pub(crate) struct Parser<'t> {
     #[allow(unused)]