| 1 | // Copyright 2018 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // Check that constants defined as a conversion are accepted. |
| 6 | |
| 7 | package main |
| 8 | |
| 9 | import "fmt" |
| 10 | |
| 11 | type Other int // Imagine this is in another package. |
| 12 | |
| 13 | const ( |
| 14 | alpha Other = iota |
| 15 | beta |
| 16 | gamma |
| 17 | delta |
| 18 | ) |
| 19 | |
| 20 | type Conv int |
| 21 | |
| 22 | const ( |
| 23 | Alpha = Conv(alpha) |
| 24 | Beta = Conv(beta) |
| 25 | Gamma = Conv(gamma) |
| 26 | Delta = Conv(delta) |
| 27 | ) |
| 28 | |
| 29 | func main() { |
| 30 | ck(Alpha, "Alpha") |
| 31 | ck(Beta, "Beta") |
| 32 | ck(Gamma, "Gamma") |
| 33 | ck(Delta, "Delta") |
| 34 | ck(42, "Conv(42)") |
| 35 | } |
| 36 | |
| 37 | func ck(c Conv, str string) { |
| 38 | if fmt.Sprint(c) != str { |
| 39 | panic("conv.go: " + str) |
| 40 | } |
| 41 | } |
| 42 |