1// compile
2
3// Copyright 2022 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7package main
8
9type Set[T comparable] map[T]struct{}
10
11func (s Set[T]) Add() Set[T] {
12	return s
13}
14
15func (s Set[T]) Copy() Set[T] {
16	return Set[T].Add(s)
17}
18
19func main() {
20	_ = Set[int]{42: {}}
21}
22