import io:*
import vector:*

fun runLambda(func: fun():int):void {
    println(func())
}

fun somethingElse():int { return 4; }

fun callLambda(func: fun(int):void):void {
    func(10)
}

fun itr<T>(it: T, func: fun(T):T):T {
    println(it)
    return func(it);
}

fun main():int {
    var func = fun():void { println("8"); }
    func()
    runLambda(fun():int { return 9;})
    callLambda(fun(a:int):void { println(a);})
    var j = 0
    while (j < 10) j = itr(j, fun(a:int):int { return a+1; })

    runLambda(somethingElse)
    println("closures now")
    var a = 1337
    runLambda(fun():int { return a;})
    runLambda(fun():int { print(a); print(j); return j;})

    var v = vector(80)
    var idx = 0
    runLambda(fun():int { return v.get(idx);})

    var outside = 40
    runLambda(fun():int { var toRet = outside; outside += 1; return toRet;})
    println(outside)
    runLambda(fun():int { var toRet = outside; outside++; return toRet;})
    println(outside)

    return 0
}