1// run
2
3// Copyright 2009 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7// Test typed integer constants.
8
9package main
10
11import "fmt"
12
13type T int
14
15func (t T) String() string { return fmt.Sprintf("T%d", int(t)) }
16
17const (
18	A T = 1 << (1 << iota)
19	B
20	C
21	D
22	E
23)
24
25func main() {
26	s := fmt.Sprintf("%v %v %v %v %v", A, B, C, D, E)
27	if s != "T2 T4 T16 T256 T65536" {
28		println("type info didn't propagate in const: got", s)
29		panic("fail")
30	}
31	x := uint(5)
32	y := float64(uint64(1)<<x)	// used to fail to compile
33	if y != 32 {
34		println("wrong y", y)
35		panic("fail")
36	}
37}
38