Initial commit: Go 1.23 release state

test/typeparam/issue49027.dir/a.go

@@ -0,0 +1,55 @@
+// 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.
+
+package a
+
+func Conv(v interface{}) string {
+	return conv[string](v)
+}
+
+func conv[T any](v interface{}) T {
+	return v.(T)
+}
+
+func Conv2(v interface{}) (string, bool) {
+	return conv2[string](v)
+}
+
+func conv2[T any](v interface{}) (T, bool) {
+	x, ok := v.(T)
+	return x, ok
+}
+
+func Conv3(v interface{}) string {
+	return conv3[string](v)
+}
+
+func conv3[T any](v interface{}) T {
+	switch v := v.(type) {
+	case T:
+		return v
+	default:
+		var z T
+		return z
+	}
+}
+
+type Mystring string
+
+func (Mystring) Foo() {
+}
+
+func Conv4(v interface{Foo()}) Mystring {
+	return conv4[Mystring](v)
+}
+
+func conv4[T interface{Foo()}](v interface{Foo()}) T {
+	switch v := v.(type) {
+	case T:
+		return v
+	default:
+		var z T
+		return z
+	}
+}

test/typeparam/issue49027.dir/main.go

@@ -0,0 +1,33 @@
+// 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.
+
+package main
+
+import (
+	"./a"
+	"fmt"
+)
+
+func main() {
+	s := "foo"
+	x := a.Conv(s)
+	if x != s {
+		panic(fmt.Sprintf("got %s wanted %s", x, s))
+	}
+	y, ok := a.Conv2(s)
+	if !ok {
+		panic("conversion failed")
+	}
+	if y != s {
+		panic(fmt.Sprintf("got %s wanted %s", y, s))
+	}
+	z := a.Conv3(s)
+	if z != s {
+		panic(fmt.Sprintf("got %s wanted %s", z, s))
+	}
+	w := a.Conv4(a.Mystring(s))
+	if w != a.Mystring(s) {
+		panic(fmt.Sprintf("got %s wanted %s", w, s))
+	}
+}