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// 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 bad() {

        var i I

        var s string

        switch i {

        case s: // ERROR "mismatched types string and I|incompatible types"

        }

        switch s {

        case i: // ERROR "mismatched types I and string|incompatible types"

        }

        var m, m1 map[int]int

        switch m {

        case nil:

        case m1: // ERROR "can only compare map m to nil|map can only be compared to nil"

        default:

        }

        var a, a1 []int

        switch a {

        case nil:

        case a1: // ERROR "can only compare slice a to nil|slice can only be compared to nil"

        default:

        }

        var f, f1 func()

        switch f {

        case nil:

        case f1: // ERROR "can only compare func f to nil|func can only be compared to nil"

        default:

        }

}

func good() {

        var i interface{}

        var s string

        switch i {

        case s:

        }

        switch s {

        case i:

        }

}