mirror of
https://github.com/golang/go.git
synced 2025-05-10 01:53:02 +00:00
52 lines
936 B
Go
52 lines
936 B
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
|
|
x, ok := <-c // ok
|
|
_, _ = x, ok
|
|
|
|
cr <- 0 // ERROR "send"
|
|
<-cr // ok
|
|
x, ok = <-cr // ok
|
|
_, _ = x, ok
|
|
|
|
cs <- 0 // ok
|
|
<-cs // ERROR "receive"
|
|
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
|
|
}
|
|
}
|