Initial commit: Go 1.23 release state

test/typeparam/issue50690c.go

@@ -0,0 +1,50 @@
+// run
+
+// 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
+
+import (
+	"fmt"
+)
+
+type Printer[T ~string] struct {
+	PrintFn func(T)
+}
+
+func Print[T ~string](s T) {
+	fmt.Println(s)
+}
+
+func PrintWithPrinter[T ~string, S interface {
+	~struct {
+		ID       T
+		PrintFn_ func(T)
+	}
+	PrintFn() func(T)
+}](message T, obj S) {
+	obj.PrintFn()(message)
+}
+
+func main() {
+	PrintWithPrinter(
+		"Hello, world.",
+		StructWithPrinter{ID: "fake", PrintFn_: Print[string]},
+	)
+}
+
+type StructWithPrinter struct {
+	ID       string
+	PrintFn_ func(string)
+}
+
+// Field accesses through type parameters are disabled
+// until we have a more thorough understanding of the
+// implications on the spec. See issue #51576.
+// Use accessor method instead.
+
+func (s StructWithPrinter) PrintFn() func(string) {
+	return s.PrintFn_
+}