//
// tree.cs: keeps a tree representation of the generated code
//
// Author: Miguel de Icaza (miguel@gnu.org)
//
// Licensed under the terms of the GNU GPL
//
// (C) 2001 Ximian, Inc (http://www.ximian.com)
//
//

using System;
using System.Collections;
using System.Reflection;
using System.Reflection.Emit;
using System.IO;

namespace Mono.CSharp
{

	public interface ITreeDump {
		int  Dump (Tree tree, StreamWriter output);
		void ParseOptions (string options);
	}

	// <summary>
	//   
	//   We store here all the toplevel types that we have parsed,
	//   this is the root of all information we have parsed.
	// 
	// </summary>
	
	public class Tree {
		TypeContainer root_types;

		// <summary>
		//   Keeps track of all the types definied (classes, structs, ifaces, enums)
		// </summary>
		Hashtable decls;
		
		public Tree ()
		{
			root_types = new RootTypes ();

			decls = new Hashtable ();
		}

		public void RecordDecl (Namespace ns, MemberName name, DeclSpace ds)
		{
			// This is recorded for tracking inner partial classes only
			decls [name] = ds;

			if (ds.Parent == root_types)
				ns.AddDeclSpace (name.Basename, ds);
		}
		
		//
		// FIXME: Why are we using Types?
		//
                public TypeContainer Types {
                        get { return root_types; }
                }

		public DeclSpace GetDecl (MemberName name)
		{
			return (DeclSpace) decls [name];
		}

		public Hashtable AllDecls {
			get { return decls; }
		}
	}

	public sealed class RootTypes : TypeContainer
	{
		public RootTypes ()
			: base (null, null, MemberName.Null, null, Kind.Root)
		{
			ec = new EmitContext (null, this, Location.Null, null, null, 0, false);
		}

		public override PendingImplementation GetPendingImplementations ()
		{
			throw new InvalidOperationException ();
		}

		public override bool IsClsComplianceRequired (DeclSpace ds)
		{
			return true;
		}

		public override string GetSignatureForError ()
		{
			return "";
		}

		protected override bool AddToTypeContainer (DeclSpace ds)
		{
			return AddToContainer (ds, ds.Name);
		}
	}
}