michael@0: // An iterator keeps its data alive.
michael@0: 
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: load(libdir + "referencesVia.js");
michael@0: var key = {};
michael@0: 
michael@0: function test(obj, edgeName) {
michael@0:     var iter = obj[std_iterator]();
michael@0:     referencesVia(iter, "**UNKNOWN SLOT 0**", obj);
michael@0:     referencesVia(obj, edgeName, key);
michael@0: }
michael@0: 
michael@0: test([key],                 "element[0]");
michael@0: test(Map([[key, 'value']]), "key");
michael@0: test(Set([key]),            "key");