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// errchk $G $D/$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.

// Error messages about missing implicit methods.

package main

type T int

func (t T) V()
func (t *T) P()

type V interface {
        V()
}
type P interface {
        P()
        V()
}

type S struct {
        T
}
type SP struct {
        *T
}

func main() {
        var t T
        var v V
        var p P
        var s S
        var sp SP

        v = t
        p = t // ERROR "does not implement|requires a pointer"
        _, _ = v, p
        v = &t
        p = &t
        _, _ = v, p

        v = s
        p = s // ERROR "does not implement|requires a pointer"
        _, _ = v, p
        v = &s
        p = &s
        _, _ = v, p

        v = sp
        p = sp // no error!
        _, _ = v, p
        v = &sp
        p = &sp
        _, _ = v, p
}