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-rw-r--r--src/wasm-traversal.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/wasm-traversal.h b/src/wasm-traversal.h
index 7b160ed3d..a2e29ea77 100644
--- a/src/wasm-traversal.h
+++ b/src/wasm-traversal.h
@@ -156,7 +156,10 @@ struct Walker : public VisitorType {
// Useful methods for visitor implementions
- // Replace the current node
+ // Replace the current node. You can call this in your visit*() methods.
+ // Note that the visit*() for the result node is not called for you (i.e.,
+ // just one visit*() method is called by the traversal; if you replace a node,
+ // and you want to process the output, you must do that explicitly).
void replaceCurrent(Expression *expression) {
replace = expression;
}