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go/test/typeswitch3.go
Luuk van Dijk 13e92e4d75 gc: Better typechecks and errors in switches.
Allow any type in switch on interface value.
Statically check typeswitch early.

Fixes #2423.
Fixes #2424.

R=rsc, dsymonds
CC=golang-dev
https://golang.org/cl/5339045
2011-11-09 10:58:53 +01:00

21 lines
371 B
Go

// errchk $G -e $D/$F.go
// Copyright 2011 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 main
type I interface {
M()
}
func main(){
var x I
switch x.(type) {
case string: // ERROR "impossible"
println("FAIL")
}
}