package main

import "fmt"

type TestKey struct {
    i int
    s string
}

func ptr() (*int, *int) {
	i := 100
	return &i, &i
}


func main() {

    var errNil error
	var mapNil map[int]string
	//mapNil[1] = "aa"

    m := make(map[int]string)
    m[1] = "bb"

    assert(errNil == nil)
    assert(mapNil == nil)
    assert(m != nil)

    ms := make(map[string]int)
    ms["aa"] = 1
    assert(ms["aa"] == 1)

    mss := make(map[TestKey]int)
    mss[TestKey{1,"a"}] = 2
    assert(mss[TestKey{1,"a"}] == 2)
    assert(mss[TestKey{1,"b"}] == 0)

    mi := make(map[interface{}]int)
    mi[1] = 1
    mi["a"] = 2
    assert(mi[1] == 1)
    assert(mi["a"] == 2)
    mi["a"] = mi[1]
    assert(mi["a"] == 1)


    mp := make(map[*int]int)
    k, q := ptr()
    r,_ := ptr()
    mp[k] = 8
    assert(mp[q] == 8)
    assert(mp[r] == 0)
    assert(*k == *r)

    fmt.Println(k, q, r, *k, *q, *r)
}