mirror of
https://github.com/golang/go
synced 2024-11-25 15:27:57 -07:00
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
// errchk $G -e $D/$F.go
|
|
|
|
// Copyright 2009 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.
|
|
|
|
package main
|
|
|
|
var (
|
|
cr <-chan int
|
|
cs chan<- int
|
|
c chan int
|
|
)
|
|
|
|
func main() {
|
|
cr = c // ok
|
|
cs = c // ok
|
|
c = cr // ERROR "illegal types|incompatible|cannot"
|
|
c = cs // ERROR "illegal types|incompatible|cannot"
|
|
cr = cs // ERROR "illegal types|incompatible|cannot"
|
|
cs = cr // ERROR "illegal types|incompatible|cannot"
|
|
|
|
c <- 0 // ok
|
|
<-c // ok
|
|
//TODO(rsc): uncomment when this syntax is valid for receive+check closed
|
|
// x, ok := <-c // ok
|
|
// _, _ = x, ok
|
|
|
|
cr <- 0 // ERROR "send"
|
|
<-cr // ok
|
|
//TODO(rsc): uncomment when this syntax is valid for receive+check closed
|
|
// x, ok = <-cr // ok
|
|
// _, _ = x, ok
|
|
|
|
cs <- 0 // ok
|
|
<-cs // ERROR "receive"
|
|
////TODO(rsc): uncomment when this syntax is valid for receive+check closed
|
|
//// x, ok = <-cs // ERROR "receive"
|
|
//// _, _ = x, ok
|
|
|
|
select {
|
|
case c <- 0: // ok
|
|
case x := <-c: // ok
|
|
_ = x
|
|
|
|
case cr <- 0: // ERROR "send"
|
|
case x := <-cr: // ok
|
|
_ = x
|
|
|
|
case cs <- 0: // ok
|
|
case x := <-cs: // ERROR "receive"
|
|
_ = x
|
|
}
|
|
}
|