| // Copyright 2014 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. | |
| // Signed integers spanning zero. | |
| package main | |
| import "fmt" | |
| type Num int | |
| const ( | |
| m_2 Num = -2 + iota | |
| m_1 | |
| m0 | |
| m1 | |
| m2 | |
| ) | |
| func main() { | |
| ck(-3, "Num(-3)") | |
| ck(m_2, "m_2") | |
| ck(m_1, "m_1") | |
| ck(m0, "m0") | |
| ck(m1, "m1") | |
| ck(m2, "m2") | |
| ck(3, "Num(3)") | |
| } | |
| func ck(num Num, str string) { | |
| if fmt.Sprint(num) != str { | |
| panic("num.go: " + str) | |
| } | |
| } |