...
Run Format

Source file test/fixedbugs/bug285.go

Documentation: test/fixedbugs

  // 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
  */
  

View as plain text