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https://github.com/golang/go
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63 lines
1.1 KiB
Go
63 lines
1.1 KiB
Go
// errorcheck
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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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// Test various correct and incorrect permutations of send-only,
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// receive-only, and bidirectional channels.
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// Does not compile.
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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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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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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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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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for _ = range cs {// ERROR "receive"
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}
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close(c)
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close(cs)
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close(cr) // ERROR "receive"
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}
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