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https://github.com/golang/go
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e24977d231
The next CL will remove the -G flag, effectively hard-coding it to its current default (-G=3). Change-Id: Ib4743b529206928f9f1cca9fdb19989728327831 Reviewed-on: https://go-review.googlesource.com/c/go/+/388534 Reviewed-by: Keith Randall <khr@golang.org> Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
47 lines
801 B
Go
47 lines
801 B
Go
// run
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test for declaration and use of a parameterized embedded field.
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package main
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import (
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"fmt"
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"sync"
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)
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type MyStruct[T any] struct {
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val T
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}
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type Lockable[T any] struct {
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MyStruct[T]
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mu sync.Mutex
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}
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// Get returns the value stored in a Lockable.
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func (l *Lockable[T]) Get() T {
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l.mu.Lock()
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defer l.mu.Unlock()
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return l.MyStruct.val
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}
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// Set sets the value in a Lockable.
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func (l *Lockable[T]) Set(v T) {
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l.mu.Lock()
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defer l.mu.Unlock()
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l.MyStruct = MyStruct[T]{v}
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}
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func main() {
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var li Lockable[int]
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li.Set(5)
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if got, want := li.Get(), 5; got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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}
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