go bigalg 源码
golang bigalg 代码
文件路径：/test/bigalg.go
// run
// 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.
// Test the internal "algorithms" for objects larger than a word: hashing, equality etc.
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")
panic("bigalg")
}
if nil != NIL {
println("fail2: nil !=", NIL)
panic("bigalg")
}
if a == nil || nil == a {
println("fail3:", a, "== nil")
panic("bigalg")
}
}
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)
panic("bigalg")
}
ma[1] = a
a1 := ma[1]
if !SameArray(a, a1) {
println("fail: map val array", a, a1)
panic("bigalg")
}
}
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)
panic("bigalg")
}
a1 := <-ca
if !SameArray(a, a1) {
println("fail: map val array", a, a1)
panic("bigalg")
}
}
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)
panic("bigalg")
}
pa := new([]int)
*pa = a
i = pa
a1 = *i.(*[]int)
if !SameArray(a, a1) {
println("interface <-> *[]int", a, a1)
panic("bigalg")
}
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)
panic("bigalg")
}
i = e
e1 := i.(E)
// nothing to check; just verify it doesn't crash
_ = e1
}
func main() {
arraycmptest()
maptest()
chantest()
interfacetest()
}
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