| // compile | |
| // Copyright 2022 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 main | |
| type Set[T comparable] map[T]struct{} | |
| func (s Set[T]) Add() Set[T] { | |
| return s | |
| } | |
| func (s Set[T]) Copy() Set[T] { | |
| return Set[T].Add(s) | |
| } | |
| func main() { | |
| _ = Set[int]{42: {}} | |
| } |