| // 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 p4 | |
| type Pair[T1 interface { M() }, T2 ~int] struct { | |
| f1 T1 | |
| f2 T2 | |
| } | |
| func NewPair[T1 interface { M() }, T2 ~int](v1 T1, v2 T2) Pair[T1, T2] { | |
| return Pair[T1, T2]{f1: v1, f2: v2} | |
| } | |
| func (p Pair[X1, _]) First() X1 { | |
| return p.f1 | |
| } | |
| func (p Pair[_, X2]) Second() X2 { | |
| return p.f2 | |
| } |