Initial commit: Go 1.23 release state

test/typeparam/genembed2.go

@@ -0,0 +1,46 @@
+// run
+
+// 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.
+
+// Test for declaration and use of a parameterized embedded field.
+
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+type MyStruct[T any] struct {
+	val T
+}
+
+type Lockable[T any] struct {
+	MyStruct[T]
+	mu sync.Mutex
+}
+
+// Get returns the value stored in a Lockable.
+func (l *Lockable[T]) Get() T {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	return l.MyStruct.val
+}
+
+// Set sets the value in a Lockable.
+func (l *Lockable[T]) Set(v T) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	l.MyStruct = MyStruct[T]{v}
+}
+
+func main() {
+	var li Lockable[int]
+
+	li.Set(5)
+	if got, want := li.Get(), 5; got != want {
+		panic(fmt.Sprintf("got %d, want %d", got, want))
+	}
+}