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565b5dc076
* Code for assignment, conversions now mirrors spec. * Changed some snprint -> smprint. * Renamed runtime functions to separate interface conversions from type assertions: convT2I, assertI2T, etc. * Correct checking of \U sequences. Fixes #840. Fixes #830. Fixes #778. R=ken2 CC=golang-dev https://golang.org/cl/1303042
116 lines
3.1 KiB
Go
116 lines
3.1 KiB
Go
// $G $D/$F.go && $L $F.$A && ./$A.out || echo BUG: bug285
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// Copyright 2010 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 for issue 778: Map key values that are assignment
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// compatible with the map key type must be accepted according
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// to the spec: http://golang.org/doc/go_spec.html#Indexes .
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package main
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type T2 struct {
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x int
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}
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func (t *T2) f() int { return t.x }
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func main() {
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type B bool
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b := B(false)
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mb := make(map[B]int)
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mb[false] = 42 // this should work: false is assignment compatible with B
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mb[b] = 42
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type Z int
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z := Z(0)
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mz := make(map[Z]int)
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mz[0] = 42
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mz[z] = 42
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type S string
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s := S("foo")
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ms := make(map[S]int)
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ms["foo"] = 42
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ms[s] = 42
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type T struct {
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x int
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}
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type P *T
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p := P(nil)
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mp := make(map[P]int)
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mp[nil] = 42
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mp[p] = 42
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mp[&T{7}] = 42
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type F func(x int)
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f := func(x int) {}
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mf := make(map[F]int)
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mf[nil] = 42
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mf[f] = 42
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mf[func(x int) {}] = 42
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type M map[int]int
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m := make(M)
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mm := make(map[M]int)
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mm[nil] = 42
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mm[m] = 42
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mm[make(M)] = 42
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type C chan int
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c := make(C)
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mc := make(map[C]int)
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mc[nil] = 42
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mc[c] = 42
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mc[make(C)] = 42
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type I1 interface{}
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type I2 interface {
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f() int
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}
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var i0 interface{} = z
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var i1 I1 = p
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m0 := make(map[interface{}]int)
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m1 := make(map[I1]int)
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m2 := make(map[I2]int)
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m0[i0] = 42
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m0[i1] = 42
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m0[z] = 42 // this should work: z is assignment-compatible with interface{}
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m0[new(struct {
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x int
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})] = 42 // this should work: *struct{x int} is assignment-compatible with interface{}
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m0[p] = 42 // this should work: p is assignment-compatible with interface{}
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m0[false] = 42 // this should work: false is assignment-compatible with interface{}
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m0[17] = 42 // this should work: 17 is assignment-compatible with interface{}
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m0["foo"] = 42 // this should work: "foo" is assignment-compatible with interface{}
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m1[i0] = 42
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m1[i1] = 42
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m1[new(struct {
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x int
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})] = 42 // this should work: *struct{x int} is assignment-compatible with I1
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m1[false] = 42 // this should work: false is assignment-compatible with I1
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m1[17] = 42 // this should work: 17 is assignment-compatible with I1
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m1["foo"] = 42 // this should work: "foo" is assignment-compatible with I1
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m2[new(T2)] = 42 // this should work: *T2 is assignment-compatible with I2
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}
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/*
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6g -e bug286.go
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bug286.go:23: invalid map index false - need type B
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bug286.go:80: invalid map index z - need type interface { }
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bug286.go:83: invalid map index new(struct { x int }) - need type interface { }
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bug286.go:84: invalid map index p - need type interface { }
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bug286.go:85: invalid map index false - need type interface { }
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bug286.go:86: invalid map index 17 - need type interface { }
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bug286.go:87: invalid map index "foo" - need type interface { }
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bug286.go:93: invalid map index new(struct { x int }) - need type I1
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bug286.go:94: invalid map index false - need type I1
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bug286.go:95: invalid map index 17 - need type I1
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bug286.go:96: invalid map index "foo" - need type I1
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bug286.go:99: invalid map index new(T2) - need type I2
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bug286.go:100: invalid map index t2 - need type I2
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*/
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