| // Copyright 2021 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 | |
| type SliceConstraint[T any] interface { | |
| []T | |
| } | |
| func Map[S SliceConstraint[E], E any](s S, f func(E) E) S { | |
| return s | |
| } | |
| type MySlice []int | |
| func f(s MySlice) { | |
| Map[MySlice /* ERROR MySlice does not implement SliceConstraint\[int\] */, int](s, nil) | |
| } |