| // $G $D/$F.go && $L $F.$A && ./$A.out |
| |
| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| type T struct { |
| a float64 |
| b int64 |
| c string |
| d byte |
| } |
| |
| var a = []int{ 1, 2, 3 } |
| var NIL []int |
| |
| func arraycmptest() { |
| if NIL != nil { |
| println("fail1:", NIL, "!= nil") |
| } |
| if nil != NIL { |
| println("fail2: nil !=", NIL) |
| } |
| if a == nil || nil == a { |
| println("fail3:", a, "== nil") |
| } |
| } |
| |
| func SameArray(a, b []int) bool { |
| if len(a) != len(b) || cap(a) != cap(b) { |
| return false |
| } |
| if len(a) > 0 && &a[0] != &b[0] { |
| return false |
| } |
| return true |
| } |
| |
| var t = T{1.5, 123, "hello", 255} |
| var mt = make(map[int]T) |
| var ma = make(map[int][]int) |
| |
| func maptest() { |
| mt[0] = t |
| t1 := mt[0] |
| if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d { |
| println("fail: map val struct", t1.a, t1.b, t1.c, t1.d) |
| } |
| |
| ma[1] = a |
| a1 := ma[1] |
| if !SameArray(a, a1) { |
| println("fail: map val array", a, a1) |
| } |
| } |
| |
| var ct = make(chan T) |
| var ca = make(chan []int) |
| |
| func send() { |
| ct <- t |
| ca <- a |
| } |
| |
| func chantest() { |
| go send() |
| |
| t1 := <-ct |
| if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d { |
| println("fail: map val struct", t1.a, t1.b, t1.c, t1.d) |
| } |
| |
| a1 := <-ca |
| if !SameArray(a, a1) { |
| println("fail: map val array", a, a1) |
| } |
| } |
| |
| type E struct { } |
| var e E |
| |
| func interfacetest() { |
| var i interface{} |
| |
| i = a |
| a1 := i.([]int) |
| if !SameArray(a, a1) { |
| println("interface <-> []int", a, a1) |
| } |
| pa := new([]int) |
| *pa = a |
| i = pa |
| a1 = *i.(*[]int) |
| if !SameArray(a, a1) { |
| println("interface <-> *[]int", a, a1) |
| } |
| |
| i = t |
| t1 := i.(T) |
| if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d { |
| println("interface <-> struct", t1.a, t1.b, t1.c, t1.d) |
| } |
| |
| i = e |
| e1 := i.(E) |
| // nothing to check; just verify it doesn't crash |
| _ = e1 |
| } |
| |
| func main() { |
| arraycmptest() |
| maptest() |
| chantest() |
| interfacetest() |
| } |