gcc/testsuite/go.test/test/bigalg.go

   1 // run
   2
   3 // Copyright 2009 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 // Test the internal "algorithms" for objects larger than a word: hashing, equality etc.
   8
   9 package main
  10
  11 type T struct {
  12         a float64
  13         b int64
  14         c string
  15         d byte
  16 }
  17
  18 var a = []int{1, 2, 3}
  19 var NIL []int
  20
  21 func arraycmptest() {
  22         if NIL != nil {
  23                 println("fail1:", NIL, "!= nil")
  24                 panic("bigalg")
  25         }
  26         if nil != NIL {
  27                 println("fail2: nil !=", NIL)
  28                 panic("bigalg")
  29         }
  30         if a == nil || nil == a {
  31                 println("fail3:", a, "== nil")
  32                 panic("bigalg")
  33         }
  34 }
  35
  36 func SameArray(a, b []int) bool {
  37         if len(a) != len(b) || cap(a) != cap(b) {
  38                 return false
  39         }
  40         if len(a) > 0 && &a[0] != &b[0] {
  41                 return false
  42         }
  43         return true
  44 }
  45
  46 var t = T{1.5, 123, "hello", 255}
  47 var mt = make(map[int]T)
  48 var ma = make(map[int][]int)
  49
  50 func maptest() {
  51         mt[0] = t
  52         t1 := mt[0]
  53         if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d {
  54                 println("fail: map val struct", t1.a, t1.b, t1.c, t1.d)
  55                 panic("bigalg")
  56         }
  57
  58         ma[1] = a
  59         a1 := ma[1]
  60         if !SameArray(a, a1) {
  61                 println("fail: map val array", a, a1)
  62                 panic("bigalg")
  63         }
  64 }
  65
  66 var ct = make(chan T)
  67 var ca = make(chan []int)
  68
  69 func send() {
  70         ct <- t
  71         ca <- a
  72 }
  73
  74 func chantest() {
  75         go send()
  76
  77         t1 := <-ct
  78         if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d {
  79                 println("fail: map val struct", t1.a, t1.b, t1.c, t1.d)
  80                 panic("bigalg")
  81         }
  82
  83         a1 := <-ca
  84         if !SameArray(a, a1) {
  85                 println("fail: map val array", a, a1)
  86                 panic("bigalg")
  87         }
  88 }
  89
  90 type E struct{}
  91
  92 var e E
  93
  94 func interfacetest() {
  95         var i interface{}
  96
  97         i = a
  98         a1 := i.([]int)
  99         if !SameArray(a, a1) {
 100                 println("interface <-> []int", a, a1)
 101                 panic("bigalg")
 102         }
 103         pa := new([]int)
 104         *pa = a
 105         i = pa
 106         a1 = *i.(*[]int)
 107         if !SameArray(a, a1) {
 108                 println("interface <-> *[]int", a, a1)
 109                 panic("bigalg")
 110         }
 111
 112         i = t
 113         t1 := i.(T)
 114         if t1.a != t.a || t1.b != t.b || t1.c != t.c || t1.d != t.d {
 115                 println("interface <-> struct", t1.a, t1.b, t1.c, t1.d)
 116                 panic("bigalg")
 117         }
 118
 119         i = e
 120         e1 := i.(E)
 121         // nothing to check; just verify it doesn't crash
 122         _ = e1
 123 }
 124
 125 func main() {
 126         arraycmptest()
 127         maptest()
 128         chantest()
 129         interfacetest()
 130 }