| Russ Cox | 1b3244e | 2012-12-22 16:46:01 -0500 | [diff] [blame] | 1 | // run |
| 2 | |
| 3 | // Copyright 2012 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 | // Order of operations in select. |
| 8 | |
| 9 | package main |
| 10 | |
| 11 | func main() { |
| 12 | c := make(chan int, 1) |
| 13 | x := 0 |
| 14 | select { |
| 15 | case c <- x: // should see x = 0, not x = 42 (after makec) |
| 16 | case <-makec(&x): // should be evaluated only after c and x on previous line |
| 17 | } |
| 18 | y := <-c |
| 19 | if y != 0 { |
| 20 | panic(y) |
| 21 | } |
| 22 | } |
| 23 | |
| 24 | func makec(px *int) chan bool { |
| 25 | if false { for {} } |
| 26 | *px = 42 |
| 27 | return make(chan bool, 0) |
| 28 | } |
