Initial commit: Go 1.23 release state

test/const3.go

@@ -0,0 +1,37 @@
+// run
+
+// Copyright 2009 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 typed integer constants.
+
+package main
+
+import "fmt"
+
+type T int
+
+func (t T) String() string { return fmt.Sprintf("T%d", int(t)) }
+
+const (
+	A T = 1 << (1 << iota)
+	B
+	C
+	D
+	E
+)
+
+func main() {
+	s := fmt.Sprintf("%v %v %v %v %v", A, B, C, D, E)
+	if s != "T2 T4 T16 T256 T65536" {
+		println("type info didn't propagate in const: got", s)
+		panic("fail")
+	}
+	x := uint(5)
+	y := float64(uint64(1)<<x)	// used to fail to compile
+	if y != 32 {
+		println("wrong y", y)
+		panic("fail")
+	}
+}