1 files changed, 25 insertions, 0 deletions

diff --git a/src/parser/token_set.rs b/src/parser/token_set.rs
new file mode 100644
index 000000000..82558fa2e
--- /dev/null
+++ b/src/parser/token_set.rs
@@ -0,0 +1,25 @@
+use SyntaxKind;
+
+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),*)
+    };
+}
+