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-rw-r--r--js/src/jsapi.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/js/src/jsapi.h b/js/src/jsapi.h
index 799396a0af..005d2278e4 100644
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -2154,6 +2154,13 @@ namespace JS {
extern JS_PUBLIC_API(bool)
OrdinaryHasInstance(JSContext* cx, HandleObject objArg, HandleValue v, bool* bp);
+// Implementation of
+// https://www.ecma-international.org/ecma-262/6.0/#sec-instanceofoperator
+// This is almost identical to JS_HasInstance, except the latter may call a
+// custom hasInstance class op instead of InstanceofOperator.
+extern JS_PUBLIC_API(bool)
+InstanceofOperator(JSContext* cx, HandleObject obj, HandleValue v, bool* bp);
+
} // namespace JS
extern JS_PUBLIC_API(void*)