Apply PTAC naming simplification and preserve CodPTACParityRunner exception

src/main/java/cod/interpreter/TailCallSignal.java

@@ -0,0 +1,27 @@
+package cod.interpreter;
+
+import cod.interpreter.context.LambdaClosure;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public final class TailCallSignal extends RuntimeException {
+    public final String methodName;
+    public final LambdaClosure lambdaClosure;
+    public final List<Object> arguments;
+
+    private TailCallSignal(String methodName, LambdaClosure lambdaClosure, List<Object> arguments) {
+        this.methodName = methodName;
+        this.lambdaClosure = lambdaClosure;
+        this.arguments = arguments != null ? new ArrayList<Object>(arguments) : Collections.<Object>emptyList();
+    }
+
+    public static TailCallSignal forMethod(String methodName, List<Object> arguments) {
+        return new TailCallSignal(methodName, null, arguments);
+    }
+
+    public static TailCallSignal forLambda(LambdaClosure lambdaClosure, List<Object> arguments) {
+        return new TailCallSignal(null, lambdaClosure, arguments);
+    }
+}