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![Rob Pike](/assets/img/avatar_default.png)
Most already had comments (yay); adjusted for consistency. R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/5676102
157 lines
2.4 KiB
Go
157 lines
2.4 KiB
Go
// run
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test interface values containing structures.
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package main
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import "os"
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var fail int
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func check(b bool, msg string) {
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if (!b) {
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println("failure in", msg)
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fail++
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}
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}
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type I1 interface { Get() int; Put(int) }
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type S1 struct { i int }
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func (p S1) Get() int { return p.i }
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func (p S1) Put(i int) { p.i = i }
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func f1() {
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s := S1{1}
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var i I1 = s
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i.Put(2)
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check(i.Get() == 1, "f1 i")
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check(s.i == 1, "f1 s")
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}
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func f2() {
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s := S1{1}
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var i I1 = &s
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i.Put(2)
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check(i.Get() == 1, "f2 i")
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check(s.i == 1, "f2 s")
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}
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func f3() {
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s := &S1{1}
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var i I1 = s
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i.Put(2)
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check(i.Get() == 1, "f3 i")
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check(s.i == 1, "f3 s")
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}
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type S2 struct { i int }
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func (p *S2) Get() int { return p.i }
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func (p *S2) Put(i int) { p.i = i }
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// Disallowed by restriction of values going to pointer receivers
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// func f4() {
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// s := S2{1}
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// var i I1 = s
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// i.Put(2)
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// check(i.Get() == 2, "f4 i")
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// check(s.i == 1, "f4 s")
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// }
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func f5() {
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s := S2{1}
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var i I1 = &s
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i.Put(2)
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check(i.Get() == 2, "f5 i")
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check(s.i == 2, "f5 s")
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}
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func f6() {
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s := &S2{1}
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var i I1 = s
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i.Put(2)
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check(i.Get() == 2, "f6 i")
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check(s.i == 2, "f6 s")
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}
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type I2 interface { Get() int64; Put(int64) }
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type S3 struct { i, j, k, l int64 }
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func (p S3) Get() int64 { return p.l }
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func (p S3) Put(i int64) { p.l = i }
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func f7() {
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s := S3{1, 2, 3, 4}
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var i I2 = s
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i.Put(5)
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check(i.Get() == 4, "f7 i")
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check(s.l == 4, "f7 s")
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}
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func f8() {
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s := S3{1, 2, 3, 4}
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var i I2 = &s
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i.Put(5)
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check(i.Get() == 4, "f8 i")
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check(s.l == 4, "f8 s")
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}
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func f9() {
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s := &S3{1, 2, 3, 4}
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var i I2 = s
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i.Put(5)
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check(i.Get() == 4, "f9 i")
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check(s.l == 4, "f9 s")
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}
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type S4 struct { i, j, k, l int64 }
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func (p *S4) Get() int64 { return p.l }
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func (p *S4) Put(i int64) { p.l = i }
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// Disallowed by restriction of values going to pointer receivers
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// func f10() {
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// s := S4{1, 2, 3, 4}
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// var i I2 = s
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// i.Put(5)
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// check(i.Get() == 5, "f10 i")
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// check(s.l == 4, "f10 s")
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// }
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func f11() {
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s := S4{1, 2, 3, 4}
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var i I2 = &s
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i.Put(5)
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check(i.Get() == 5, "f11 i")
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check(s.l == 5, "f11 s")
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}
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func f12() {
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s := &S4{1, 2, 3, 4}
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var i I2 = s
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i.Put(5)
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check(i.Get() == 5, "f12 i")
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check(s.l == 5, "f12 s")
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}
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func main() {
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f1()
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f2()
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f3()
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// f4()
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f5()
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f6()
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f7()
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f8()
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f9()
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// f10()
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f11()
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f12()
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if fail > 0 {
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os.Exit(1)
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}
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}
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