| // Copyright 2020 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 p | |
| // A constraint must be an interface; it cannot | |
| // be a type parameter, for instance. | |
| func _[A interface{ type interface{} }, B A /* ERROR not an interface */ ]() |