1 files changed, 7 insertions, 0 deletions
diff --git a/src/wasm.h b/src/wasm.h
index d681f3f4b..bd2e31814 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -557,6 +557,7 @@ enum RefAsOp {
 };
 
 enum BrOnOp {
+  BrOnNull,
   BrOnCast,
   BrOnFunc,
   BrOnData,
@@ -1400,6 +1401,12 @@ public:
   // BrOnCast has an rtt that is used in the cast.
   Expression* rtt;
 
+  // TODO: BrOnNull also has an optional extra value in the spec, which we do
+  //       not support. See also the discussion on
+  //       https://github.com/WebAssembly/function-references/issues/45
+  //       - depending on the decision there, we may want to move BrOnNull into
+  //       Break or a new class of its own.
+
   void finalize();
 
   Type getCastType();