var res = left, x;
while (stack.length) {
x = stack.shift();
- res = new Lambda_app(res, x.eval_loop([], eta));
+ // res = new Lambda_app(res, x.eval_loop([], eta));
+ res = new Lambda_app(res, reduce(x, eta, false));
}
return res;
}
- return unwind(this, stack);
+ // return unwind(this, stack);
+ // post-processor, trampoline to, args
+ return [null, null, unwind(this, stack)];
};
this.eval_cbv = function (aggressive) {
return this;
this.eval_loop = function (stack, eta) {
var new_stack = stack.slice(0);
new_stack.unshift(this.right);
- return this.left.eval_loop(new_stack, eta);
+ // return this.left.eval_loop(new_stack, eta);
+ // post-processor, trampoline to, args
+ return [null, this.left, new_stack, eta];
};
this.eval_cbv = function (aggressive) {
var left = this.left.eval_cbv(aggressive);
}
};
this.eval_loop = function (stack, eta) {
+ function post(evaluated_body) {
+ var term = new Lambda_lam(this.bound, evaluated_body);
+ if (eta) {
+ return term.check_eta();
+ } else {
+ return term;
+ }
+ }
if (stack.length === 0) {
- var term = new Lambda_lam(this.bound, this.body.eval_loop([], eta));
- if (eta) {
- return term.check_eta();
- } else {
- return term;
- }
+// var term = new Lambda_lam(this.bound, this.body.eval_loop([], eta));
+// if (eta) {
+// return term.check_eta();
+// } else {
+// return term;
+// }
+ // post-processor, trampoline to, args
+ return [post, this.body, [], eta];
} else {
var x = stack[0];
var xs = stack.slice(1);
- return subst(this.bound, x, this.body).eval_loop(xs, eta);
+ // return subst(this.bound, x, this.body).eval_loop(xs, eta);
+ // post-processor, trampoline to, args
+ return [null, subst(this.bound, x, this.body), xs, eta];
}
};
this.eval_cbv = function (aggressive) {
if (cbv) {
return expr.eval_cbv(cbv > 1);
} else {
- return expr.eval_loop([], eta);
+ // return expr.eval_loop([], eta);
+ var post = null, to_eval = expr, res = [[], eta];
+ while (to_eval !== null) {
+ res = to_eval.eval_loop.apply(to_eval, res);
+ post = res.shift();
+ to_eval = res.shift();
+ if (post) {
+ res = post(res);
+ }
+ }
+ return res[0];
}
}