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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.

// Check methods derived from embedded interface and *interface values.

package main

import "os"

const Value = 1e12

type Inter interface { M() int64 }

type T int64

func (t T) M() int64 { return int64(t) }

var t = T(Value)

var pt = &t

var ti Inter = t

var pti = &ti

type S struct { Inter }

var s = S{ ti }

var ps = &s

type SP struct { *Inter }       // ERROR "interface"

var i Inter

var pi = &i

var ok = true

func check(s string, v int64) {

        if v != Value {

                println(s, v)

                ok = false

        }

}

func main() {

        check("t.M()", t.M())

        check("pt.M()", pt.M())

        check("ti.M()", ti.M())

        check("pti.M()", pti.M())       // ERROR "method"

        check("s.M()", s.M())

        check("ps.M()", ps.M())

        i = t

        check("i = t; i.M()", i.M())

        check("i = t; pi.M()", pi.M())  // ERROR "method"

        i = pt

        check("i = pt; i.M()", i.M())

        check("i = pt; pi.M()", pi.M()) // ERROR "method"

        i = s

        check("i = s; i.M()", i.M())

        check("i = s; pi.M()", pi.M())  // ERROR "method"

        i = ps

        check("i = ps; i.M()", i.M())

        check("i = ps; pi.M()", pi.M()) // ERROR "method"

        if !ok {

                println("BUG: interface10")

                os.Exit(1)

        }

}