Imported Upstream version 60upstream/60

1 files changed, 51 insertions, 0 deletions

diff --git a/test/chan/perm.go b/test/chan/perm.go
new file mode 100644
index 000000000..038ff94e3
--- /dev/null
+++ b/test/chan/perm.go
@@ -0,0 +1,51 @@
+// 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
+	}
+}