1 files changed, 5 insertions, 0 deletions
diff --git a/src/comp/front/ast.rs b/src/comp/front/ast.rs
index d45260f3..52ae66c8 100644
--- a/src/comp/front/ast.rs
+++ b/src/comp/front/ast.rs
@@ -83,6 +83,11 @@ tag mutability {
     imm;
 }
 
+tag opacity {
+    op_abstract;
+    op_transparent;
+}
+
 tag layer {
     layer_value;
     layer_state;