2004-04-02 Martin Baulig <martin@ximian.com>

2004-04-02  Martin Baulig  <martin@ximian.com>

	* ecore.cs (IAlias): New public interface.
	(TypeExpr, TypeExpression): Implement IAlias.
	(TypeAliasExpression): New public class.

	* namespace.cs (Namespace): Implement IAlias.
	(Namespace.Lookup): Return an IAlias instead on an object.
	(Namespace.DefineName): Take an IAlias instead of an object.
	(NamespaceEntry.AliasEntry.Resolve): Return an IAlias instead of
	an object.
	(NamespaceEntry.UsingAlias): Take a Membername instead of an
	Expression.
	(NamespaceEntry.LookupAlias): Return an IAlias instead on an
	object.
	(NamespaceEntry.Lookup): Likewise.

	* rootcontext.cs (RootContext.LookupType): Return a TypeExpr
	instead of a Type.

	* decl.cs (DeclSpace): Implement IAlias.
	(DeclSpace.LookupAlias): Return an IAlias instead of a string.

	* generic.cs (ConstructedType): Improved error checking.

svn path=/trunk/mcs/; revision=24980