mirror of
https://github.com/golang/go
synced 2024-11-06 08:26:12 -07:00
49 lines
876 B
Go
49 lines
876 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"
|
||
|
|
c = cs; // ERROR "illegal types"
|
||
|
|
cr = cs; // ERROR "illegal types"
|
||
|
|
cs = cr; // ERROR "illegal types"
|
||
|
|
|
||
|
|
c <- 0; // ok
|
||
|
|
ok := c <- 0; // ok
|
||
|
|
<-c; // ok
|
||
|
|
x, ok := <-c; // ok
|
||
|
|
|
||
|
|
cr <- 0; // ERROR "send"
|
||
|
|
ok = cr <- 0; // ERROR "send"
|
||
|
|
<-cr; // ok
|
||
|
|
x, ok = <-cr; // ok
|
||
|
|
|
||
|
|
cs <- 0; // ok
|
||
|
|
ok = cs <- 0; // ok
|
||
|
|
<-cs; // ERROR "receive"
|
||
|
|
x, ok = <-cs; // ERROR "receive"
|
||
|
|
|
||
|
|
select {
|
||
|
|
case c <- 0: // ok
|
||
|
|
case x := <-c: // ok
|
||
|
|
|
||
|
|
case cr <- 0: // ERROR "send"
|
||
|
|
case x := <-cr: // ok
|
||
|
|
|
||
|
|
case cs <- 0: // ok;
|
||
|
|
case x := <-cs: // ERROR "receive"
|
||
|
|
}
|
||
|
|
}
|