Method get

chapter21/src/test/java/com/seaofnodes/simple/Eval2.java:53–59

(Node n)

        }
        // Get a mapped Node, perhaps using the prior stack frame crawl
        Object get(Node n) {
            assert _refcnt>0;
            Object d = _data.get(n);
            return d != null ? d
                : _prior == null ? null
                : _prior.get(n);
        }

        // Short debugging print
        public String p() {