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https://github.com/golang/go
synced 2024-11-22 05:54:40 -07:00
58 lines
1.0 KiB
Go
58 lines
1.0 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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ok := c <- 0; // ok
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_ = 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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ok = cr <- 0; // ERROR "send"
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_ = ok;
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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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ok = cs <- 0; // ok
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_ = 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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}
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