From 5347217b56a38513253107407ca69193944ab7d4 Mon Sep 17 00:00:00 2001
From: Cary R <cygcary@yahoo.com>
Date: Wed, 10 Oct 2012 18:27:02 -0700
Subject: [PATCH] A signal can be an enumeration variable.

An enumeration variable can be a R-value in an enumeration assignment so
pass on this attribute.
---
 netlist.cc | 7 ++++++-
 netlist.h  | 2 ++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/netlist.cc b/netlist.cc
index 3aa48920b..57e9e3be1 100644
--- a/netlist.cc
+++ b/netlist.cc
@@ -2423,7 +2423,7 @@ const NetScope* NetEScope::scope() const
 }
 
 NetESignal::NetESignal(NetNet*n)
-: NetExpr(n->vector_width()), net_(n), word_(0)
+: NetExpr(n->vector_width()), net_(n), enum_type_(n->enumeration()), word_(0)
 {
       net_->incr_eref();
       set_line(*n);
@@ -2448,6 +2448,11 @@ perm_string NetESignal::name() const
       return net_->name();
 }
 
+netenum_t* NetESignal::enumeration() const
+{
+      return enum_type_;
+}
+
 const NetExpr* NetESignal::word_index() const
 {
       return word_;
diff --git a/netlist.h b/netlist.h
index a86f13398..bd5af11b0 100644
--- a/netlist.h
+++ b/netlist.h
@@ -4086,6 +4086,7 @@ class NetESignal  : public NetExpr {
       virtual NetESignal* dup_expr() const;
       NetNet* synthesize(Design*des, NetScope*scope, NetExpr*root);
       NexusSet* nex_input(bool rem_out = true);
+      netenum_t*enumeration() const;
 
       virtual NetExpr*evaluate_function(const LineInfo&loc,
 					std::map<perm_string,NetExpr*>&ctx) const;
@@ -4110,6 +4111,7 @@ class NetESignal  : public NetExpr {
 
     private:
       NetNet*net_;
+      netenum_t*enum_type_;
 	// Expression to select a word from the net.
       NetExpr*word_;
 };