Initial commit: Go 1.23 release state

test/typeparam/typeswitch1.go

@@ -0,0 +1,33 @@
+// 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.
+
+package main
+
+func f[T any](i interface{}) {
+	switch i.(type) {
+	case T:
+		println("T")
+	case int:
+		println("int")
+	case int32, int16:
+		println("int32/int16")
+	case struct{ a, b T }:
+		println("struct{T,T}")
+	default:
+		println("other")
+	}
+}
+func main() {
+	f[float64](float64(6))
+	f[float64](int(7))
+	f[float64](int32(8))
+	f[float64](struct{ a, b float64 }{a: 1, b: 2})
+	f[float64](int8(9))
+	f[int32](int32(7))
+	f[int](int32(7))
+	f[any](int(10))
+	f[interface{ M() }](int(11))
+}