codekingpro/portable-devtools

1// run2 3// Copyright 2021 The Go Authors. All rights reserved.4// Use of this source code is governed by a BSD-style5// license that can be found in the LICENSE file.6 7// Test for declaration and use of a parameterized embedded field.8 9package main10 11import (12	"fmt"13	"sync"14)15 16type MyStruct[T any] struct {17	val T18}19 20type Lockable[T any] struct {21	MyStruct[T]22	mu sync.Mutex23}24 25// Get returns the value stored in a Lockable.26func (l *Lockable[T]) Get() T {27	l.mu.Lock()28	defer l.mu.Unlock()29	return l.MyStruct.val30}31 32// Set sets the value in a Lockable.33func (l *Lockable[T]) Set(v T) {34	l.mu.Lock()35	defer l.mu.Unlock()36	l.MyStruct = MyStruct[T]{v}37}38 39func main() {40	var li Lockable[int]41 42	li.Set(5)43	if got, want := li.Get(), 5; got != want {44		panic(fmt.Sprintf("got %d, want %d", got, want))45	}46}47