mirror of
https://github.com/golang/go
synced 2024-11-18 05:34:48 -07:00
0b477ef17e
X ,s;^// \$G (\$D/)?\$F\.go *$;// compile;g X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A *$;// build;g X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A && \./\$A\.out *$;// run;g X ,s;^// errchk \$G( -e)? (\$D/)?\$F\.go *$;// errorcheck;g R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/5656082
69 lines
933 B
Go
69 lines
933 B
Go
// run
|
|
|
|
// Copyright 2011 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 select when discarding a value.
|
|
|
|
package main
|
|
|
|
import "runtime"
|
|
|
|
func recv1(c <-chan int) {
|
|
<-c
|
|
}
|
|
|
|
func recv2(c <-chan int) {
|
|
select {
|
|
case <-c:
|
|
}
|
|
}
|
|
|
|
func recv3(c <-chan int) {
|
|
c2 := make(chan int)
|
|
select {
|
|
case <-c:
|
|
case <-c2:
|
|
}
|
|
}
|
|
|
|
func send1(recv func(<-chan int)) {
|
|
c := make(chan int)
|
|
go recv(c)
|
|
runtime.Gosched()
|
|
c <- 1
|
|
}
|
|
|
|
func send2(recv func(<-chan int)) {
|
|
c := make(chan int)
|
|
go recv(c)
|
|
runtime.Gosched()
|
|
select {
|
|
case c <- 1:
|
|
}
|
|
}
|
|
|
|
func send3(recv func(<-chan int)) {
|
|
c := make(chan int)
|
|
go recv(c)
|
|
runtime.Gosched()
|
|
c2 := make(chan int)
|
|
select {
|
|
case c <- 1:
|
|
case c2 <- 1:
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
send1(recv1)
|
|
send2(recv1)
|
|
send3(recv1)
|
|
send1(recv2)
|
|
send2(recv2)
|
|
send3(recv2)
|
|
send1(recv3)
|
|
send2(recv3)
|
|
send3(recv3)
|
|
}
|