Method call

chapter21/src/test/java/com/seaofnodes/simple/Eval2.java:211–221

( CallNode call )

    // Make a call.
    private static CFGNode call( CallNode call ) {
        // Set up the Return PC and return frame (which is just the current frame).
        // Really making a Continuation, but it's just a Closure
        Closure cont = new Closure(call.cend(),F);
        // Set the return continuation into the current frame RPC
        F.put(call, cont );
        // Next Frame to use
        F = new Frame(F);
        // Target function and environment
        return CODE.link(tfp(call.fptr()));
    }

    private static CFGNode ret( ReturnNode ret ) {
        // Fetch return expression value and continuation from current frame