channel direction tests
(will submit with compiler fixes).
R=r
DELTA=44 (44 added, 0 deleted, 0 changed)
OCL=29211
CL=29248
diff --git a/test/chan/perm.go b/test/chan/perm.go
new file mode 100644
index 0000000..31ab840
--- /dev/null
+++ b/test/chan/perm.go
@@ -0,0 +1,48 @@
+// 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"
+ }
+}
