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// errchk $G -e $D/$F.go

// Copyright 2009 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 that basic operations on named types are valid
// and preserve the type.

package main

type Bool bool

type Map map[int]int

func (Map) M() {}

type Slice []byte

var slice Slice

func asBool(Bool)     {}
func asString(String) {}

type String string

func main() {
        var (
                b    Bool = true
                i, j int
                c    = make(chan int)
                m    = make(Map)
        )

        asBool(b)
        asBool(!b)
        asBool(true)
        asBool(*&b)
        asBool(Bool(true))
        asBool(1 != 2) // ERROR "cannot use.*type bool.*as type Bool"
        asBool(i < j)  // ERROR "cannot use.*type bool.*as type Bool"

        _, b = m[2] // ERROR "cannot .* bool.*type Bool"

        var inter interface{}
        _, b = inter.(Map) // ERROR "cannot .* bool.*type Bool"
        _ = b

        var minter interface {
                M()
        }
        _, b = minter.(Map) // ERROR "cannot .* bool.*type Bool"
        _ = b

        _, bb := <-c
        asBool(bb) // ERROR "cannot use.*type bool.*as type Bool"
        _, b = <-c // ERROR "cannot .* bool.*type Bool"
        _ = b

        asString(String(slice)) // ok
}