From 11f119d0aba5ca578f2178cf83ba5096cc26cb22 Mon Sep 17 00:00:00 2001
From: Jim Lawson
Date: Tue, 26 Jul 2016 08:24:45 -0700
Subject: Add ValidIO definition for old code.

---
 src/main/scala/chisel3/package.scala | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/main/scala/chisel3/package.scala b/src/main/scala/chisel3/package.scala
index 774455c4..926ca00d 100644
--- a/src/main/scala/chisel3/package.scala
+++ b/src/main/scala/chisel3/package.scala
@@ -111,8 +111,10 @@ package object chisel3 {
     def do_=/= (that: BitPat)(implicit sourceInfo: SourceInfo): Bool = that =/= x
   }
 
+  // Compatibility with existing code.
   val INPUT = chisel3.core.Direction.Input
   val OUTPUT = chisel3.core.Direction.Output
   val NODIR = chisel3.core.Direction.Unspecified
   type ChiselException = chisel3.internal.ChiselException
+  type ValidIO[+T <: Data] = chisel3.util.Valid[T]
 }
-- 
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