File size: 2,070 Bytes
fc11197 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | // Copyright 2016 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 test
import "testing"
// Test to make sure we make copies of the values we
// put in interfaces.
var x int
func TestEfaceConv1(t *testing.T) {
a := 5
i := any(a)
a += 2
if got := i.(int); got != 5 {
t.Errorf("wanted 5, got %d\n", got)
}
}
func TestEfaceConv2(t *testing.T) {
a := 5
sink = &a
i := any(a)
a += 2
if got := i.(int); got != 5 {
t.Errorf("wanted 5, got %d\n", got)
}
}
func TestEfaceConv3(t *testing.T) {
x = 5
if got := e2int3(x); got != 5 {
t.Errorf("wanted 5, got %d\n", got)
}
}
//go:noinline
func e2int3(i any) int {
x = 7
return i.(int)
}
func TestEfaceConv4(t *testing.T) {
a := 5
if got := e2int4(a, &a); got != 5 {
t.Errorf("wanted 5, got %d\n", got)
}
}
//go:noinline
func e2int4(i any, p *int) int {
*p = 7
return i.(int)
}
type Int int
var y Int
type I interface {
foo()
}
func (i Int) foo() {
}
func TestIfaceConv1(t *testing.T) {
a := Int(5)
i := any(a)
a += 2
if got := i.(Int); got != 5 {
t.Errorf("wanted 5, got %d\n", int(got))
}
}
func TestIfaceConv2(t *testing.T) {
a := Int(5)
sink = &a
i := any(a)
a += 2
if got := i.(Int); got != 5 {
t.Errorf("wanted 5, got %d\n", int(got))
}
}
func TestIfaceConv3(t *testing.T) {
y = 5
if got := i2Int3(y); got != 5 {
t.Errorf("wanted 5, got %d\n", int(got))
}
}
//go:noinline
func i2Int3(i I) Int {
y = 7
return i.(Int)
}
func TestIfaceConv4(t *testing.T) {
a := Int(5)
if got := i2Int4(a, &a); got != 5 {
t.Errorf("wanted 5, got %d\n", int(got))
}
}
//go:noinline
func i2Int4(i I, p *Int) Int {
*p = 7
return i.(Int)
}
func BenchmarkEfaceInteger(b *testing.B) {
sum := 0
for i := 0; i < b.N; i++ {
sum += i2int(i)
}
sink = sum
}
//go:noinline
func i2int(i any) int {
return i.(int)
}
func BenchmarkTypeAssert(b *testing.B) {
e := any(Int(0))
r := true
for i := 0; i < b.N; i++ {
_, ok := e.(I)
if !ok {
r = false
}
}
sink = r
}
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