Fix for pr2924354.

Creation of implicit nets requires knowledge of whether an identifier
has been declared before it is used. Currently implicit nets are
created during elaboration, but by this stage the order of declaration
and use is not known. This patch moves the creation of implicit nets
into the parser stage.

Module.h

@@ -1,7 +1,7 @@
 #ifndef __Module_H
 #define __Module_H
 /*
- * Copyright (c) 1998-2009 Stephen Williams ([email protected])
+ * Copyright (c) 1998-2010 Stephen Williams ([email protected])
  *
  *    This source code is free software; you can redistribute it
  *    and/or modify it in source code form under the terms of the GNU
@@ -79,8 +79,6 @@ class Module : public PScope, public LineInfo {
       enum UCDriveType { UCD_NONE, UCD_PULL0, UCD_PULL1 };
       UCDriveType uc_drive;
 
-      NetNet::Type default_nettype;
-
 	/* specparams are simpler then other params, in that they have
 	   no type information. They are merely constant
 	   expressions. */
@@ -118,11 +116,7 @@ class Module : public PScope, public LineInfo {
       map<perm_string,PTask*> tasks;
       map<perm_string,PFunction*> funcs;
 
-	/* The module has a list of genvars that may be used in
-	   various generate schemes. */
-      map<perm_string,LineInfo*> genvars;
-
-	/* the module has a list of generate schemes that appear in
+	/* The module has a list of generate schemes that appear in
 	   the module definition. These are used at elaboration time. */
       list<PGenerate*> generate_schemes;