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https://github.com/golang/go
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55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
// errchk $G -e $D/$F.go
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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var (
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cr <-chan int
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cs chan<- int
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c chan int
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)
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func main() {
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cr = c // ok
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cs = c // ok
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c = cr // ERROR "illegal types|incompatible|cannot"
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c = cs // ERROR "illegal types|incompatible|cannot"
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cr = cs // ERROR "illegal types|incompatible|cannot"
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cs = cr // ERROR "illegal types|incompatible|cannot"
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c <- 0 // ok
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<-c // ok
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//TODO(rsc): uncomment when this syntax is valid for receive+check closed
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// x, ok := <-c // ok
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// _, _ = x, ok
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cr <- 0 // ERROR "send"
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<-cr // ok
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//TODO(rsc): uncomment when this syntax is valid for receive+check closed
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// x, ok = <-cr // ok
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// _, _ = x, ok
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cs <- 0 // ok
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<-cs // ERROR "receive"
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////TODO(rsc): uncomment when this syntax is valid for receive+check closed
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//// x, ok = <-cs // ERROR "receive"
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//// _, _ = x, ok
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select {
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case c <- 0: // ok
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case x := <-c: // ok
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_ = x
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case cr <- 0: // ERROR "send"
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case x := <-cr: // ok
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_ = x
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case cs <- 0: // ok
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case x := <-cs: // ERROR "receive"
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_ = x
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}
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}
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