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// run
// Copyright 2020 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.
// Check to make sure that we compare fields in order. See issue 8606.
package main
import "fmt"
func main() {
type A [2]interface{}
type A2 [6]interface{}
type S struct{ x, y interface{} }
type S2 struct{ x, y, z, a, b, c interface{} }
type T1 struct {
i interface{}
a int64
j interface{}
}
type T2 struct {
i interface{}
a, b, c int64
j interface{}
}
type T3 struct {
i interface{}
s string
j interface{}
}
type S3 struct {
f any
i int
}
type S4 struct {
a [1000]byte
b any
}
b := []byte{1}
s1 := S3{func() {}, 0}
s2 := S3{func() {}, 1}
for _, test := range []struct {
panic bool
a, b interface{}
}{
{false, A{1, b}, A{2, b}},
{true, A{b, 1}, A{b, 2}},
{false, A{1, b}, A{"2", b}},
{true, A{b, 1}, A{b, "2"}},
{false, A2{1, b}, A2{2, b}},
{true, A2{b, 1}, A2{b, 2}},
{false, A2{1, b}, A2{"2", b}},
{true, A2{b, 1}, A2{b, "2"}},
{false, S{1, b}, S{2, b}},
{true, S{b, 1}, S{b, 2}},
{false, S{1, b}, S{"2", b}},
{true, S{b, 1}, S{b, "2"}},
{false, S2{x: 1, y: b}, S2{x: 2, y: b}},
{true, S2{x: b, y: 1}, S2{x: b, y: 2}},
{false, S2{x: 1, y: b}, S2{x: "2", y: b}},
{true, S2{x: b, y: 1}, S2{x: b, y: "2"}},
{true, T1{i: b, a: 1}, T1{i: b, a: 2}},
{false, T1{a: 1, j: b}, T1{a: 2, j: b}},
{true, T2{i: b, a: 1}, T2{i: b, a: 2}},
{false, T2{a: 1, j: b}, T2{a: 2, j: b}},
{true, T3{i: b, s: "foo"}, T3{i: b, s: "bar"}},
{false, T3{s: "foo", j: b}, T3{s: "bar", j: b}},
{true, T3{i: b, s: "fooz"}, T3{i: b, s: "bar"}},
{false, T3{s: "fooz", j: b}, T3{s: "bar", j: b}},
{true, A{s1, s2}, A{s2, s1}},
{true, s1, s2},
{false, S4{[1000]byte{0}, func() {}}, S4{[1000]byte{1}, func() {}}},
} {
f := func() {
defer func() {
if recover() != nil {
panic(fmt.Sprintf("comparing %#v and %#v panicked", test.a, test.b))
}
}()
if test.a == test.b {
panic(fmt.Sprintf("values %#v and %#v should not be equal", test.a, test.b))
}
}
if test.panic {
shouldPanic(fmt.Sprintf("comparing %#v and %#v did not panic", test.a, test.b), f)
} else {
f() // should not panic
}
}
}
func shouldPanic(name string, f func()) {
defer func() {
if recover() == nil {
panic(name)
}
}()
f()
}
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