Method x

chapter21/src/test/java/com/seaofnodes/simple/Eval2.java:293–293

( Node n )

    static Object val( Node n ) { return F.get(n); }
    // Fetch and unbox as primitive long
    static long   x( Node n ) { Object d = F.get(n); return d==null ? 0 : (Long)  F.get(n);  }
    // Fetch and unbox as primitive double
    static double d( Node n ) { Object d = F.get(n); return d==null ? 0 : (Double)F.get(n);  }
    // Fetch and unbox a function constant