blob: fcfed0075cf0c7056a37069f17d8a964560020dc [file] [log] [blame]
// Copyright 2014 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 interfaces
type I interface {
Rand() int32
}
func Add3(r I) int32 {
return r.Rand() + r.Rand() + r.Rand()
}
// chosen by fair dice roll.
// guaranteed to be random.
type seven struct{}
func (seven) Rand() int32 { return 7 }
func Seven() I { return seven{} }
type WithParam interface {
HasParam(p bool)
}