package main

var a = 1
var b = 1
var c = 1 // never modified
var d = []int{1, 2}
var e = []int{1, 2}
var f = []int{1, 2} // never modified
var g = map[string]int{"a": 1}
var h = map[string]int{"a": 1}
var i = map[string]int{"a": 1} // never modified
var j = T{a: 1}
var k = T{a: 1}
var l = T{a: 1} // never modified

func main() {
    a = 2      // modifies a
    modInt(&b) // modifies b
    useInt(c)  // uses c but doesn't modify

    d[0] = 2     // modifies d
    modSlice(e)  // modifies e
    useInt(f[0]) // uses f but doesn't modify

    g["a"] = 2     // modifies g
    modMap(h)      // modifies h
    useInt(i["a"]) // uses i but doesn't modify

    j.a = 2     // modifies j
    modT(&k)    // modifies k
    useInt(l.a) // uses i but doesn't modify
}

func modInt(in *int) {
    *in = 2
}

func modSlice(in []int) {
    in[0] = 2
}

func modMap(in map[string]int) {
    in["a"] = 2
}

func modT(in *T) {
    in.a = 2
}

func useInt(i int) {
    println(i)
}

type T struct {
    a int
}