cmd/compile: give ChanDir a type
Change-Id: I03621db79637b04982e1f0e7b4268c4ed2db6d22
Reviewed-on: https://go-review.googlesource.com/21484
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go
index 117836d..fdea1f2 100644
--- a/src/cmd/compile/internal/gc/go.go
+++ b/src/cmd/compile/internal/gc/go.go
@@ -128,12 +128,18 @@
CTNIL
)
+// ChanDir is whether a channel can send, receive, or both.
+type ChanDir uint8
+
+func (c ChanDir) CanRecv() bool { return c&Crecv != 0 }
+func (c ChanDir) CanSend() bool { return c&Csend != 0 }
+
const (
// types of channel
// must match ../../../../reflect/type.go:/ChanDir
- Crecv = 1 << 0
- Csend = 1 << 1
- Cboth = Crecv | Csend
+ Crecv ChanDir = 1 << 0
+ Csend ChanDir = 1 << 1
+ Cboth ChanDir = Crecv | Csend
)
// The Class of a variable/function describes the "storage class"
