go bug285 源码
golang bug285 代码
文件路径：/test/fixedbugs/bug285.go
// run
// Copyright 2010 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 for issue 778: Map key values that are assignment
// compatible with the map key type must be accepted according
// to the spec: https://golang.org/doc/go_spec.html#Indexes .
package main
type T2 struct {
x int
}
func (t *T2) f() int { return t.x }
func main() {
type B bool
b := B(false)
mb := make(map[B]int)
mb[false] = 42 // this should work: false is assignment compatible with B
mb[b] = 42
type Z int
z := Z(0)
mz := make(map[Z]int)
mz[0] = 42
mz[z] = 42
type S string
s := S("foo")
ms := make(map[S]int)
ms["foo"] = 42
ms[s] = 42
type T struct {
x int
}
type P *T
p := P(nil)
mp := make(map[P]int)
mp[nil] = 42
mp[p] = 42
mp[&T{7}] = 42
type C chan int
c := make(C)
mc := make(map[C]int)
mc[nil] = 42
mc[c] = 42
mc[make(C)] = 42
type I1 interface{}
type I2 interface {
f() int
}
var i0 interface{} = z
var i1 I1 = p
m0 := make(map[interface{}]int)
m1 := make(map[I1]int)
m2 := make(map[I2]int)
m0[i0] = 42
m0[i1] = 42
m0[z] = 42 // this should work: z is assignment-compatible with interface{}
m0[new(struct {
x int
})] = 42 // this should work: *struct{x int} is assignment-compatible with interface{}
m0[p] = 42 // this should work: p is assignment-compatible with interface{}
m0[false] = 42 // this should work: false is assignment-compatible with interface{}
m0[17] = 42 // this should work: 17 is assignment-compatible with interface{}
m0["foo"] = 42 // this should work: "foo" is assignment-compatible with interface{}
m1[i0] = 42
m1[i1] = 42
m1[new(struct {
x int
})] = 42 // this should work: *struct{x int} is assignment-compatible with I1
m1[false] = 42 // this should work: false is assignment-compatible with I1
m1[17] = 42 // this should work: 17 is assignment-compatible with I1
m1["foo"] = 42 // this should work: "foo" is assignment-compatible with I1
m2[new(T2)] = 42 // this should work: *T2 is assignment-compatible with I2
}
/*
6g -e bug286.go
bug286.go:23: invalid map index false - need type B
bug286.go:80: invalid map index z - need type interface { }
bug286.go:83: invalid map index new(struct { x int }) - need type interface { }
bug286.go:84: invalid map index p - need type interface { }
bug286.go:85: invalid map index false - need type interface { }
bug286.go:86: invalid map index 17 - need type interface { }
bug286.go:87: invalid map index "foo" - need type interface { }
bug286.go:93: invalid map index new(struct { x int }) - need type I1
bug286.go:94: invalid map index false - need type I1
bug286.go:95: invalid map index 17 - need type I1
bug286.go:96: invalid map index "foo" - need type I1
bug286.go:99: invalid map index new(T2) - need type I2
bug286.go:100: invalid map index t2 - need type I2
*/
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