function assert(b, str)
{
if (b) {
return;
} else {
throw "assertion failed: " + str;
}
}
var log_str = "";
function log(str)
{
log_str += str + ",";
}
function f(a, b, c)
{
var x = 10;
log("a="+a);
function g(d) {
function h() {
log("d=" + d);
log("x=" + x);
}
log("b=" + b);
log("c=" + c);
h();
}
g(4);
return g;
}
var g1 = f(1, 2, 3);
g1(5);
assert(log_str === "a=1,b=2,c=3,d=4,x=10,b=2,c=3,d=5,x=10,", "closure1");
function test_closure1()
{
function f2()
{
var val = 1;
function set(a) {
val = a;
}
function get(a) {
return val;
}
return { "set": set, "get": get };
}
var obj = f2();
obj.set(10);
var r;
r = obj.get();
assert(r === 10, "closure2");
}
function test_closure2()
{
var expr_func = function myfunc1(n) {
function myfunc2(n) {
return myfunc1(n - 1);
}
if (n == 0)
return 0;
else
return myfunc2(n);
};
var r;
r = expr_func(1);
assert(r === 0, "expr");
}
function test_closure3()
{
function fib(n)
{
if (n <= 0)
return 0;
else if (n === 1)
return 1;
else {
return fib(n - 1) + fib(n - 2);
}
}
var fib_func = function fib1(n)
{
if (n <= 0)
return 0;
else if (n == 1)
return 1;
else
return fib1(n - 1) + fib1(n - 2);
};
assert(fib(6) === 8, "fib");
assert(fib_func(6) === 8, "fib");
}
test_closure1();
test_closure2();
test_closure3();