// $Id$

/*

COPYRIGHT

Copyright 1992, 1993, 1994 Sun Microsystems, Inc.  Printed in the United
States of America.  All Rights Reserved.

This product is protected by copyright and distributed under the following
license restricting its use.

The Interface Definition Language Compiler Front End (CFE) is made
available for your use provided that you include this license and copyright
notice on all media and documentation and the software program in which
this product is incorporated in whole or part. You may copy and extend
functionality (but may not remove functionality) of the Interface
Definition Language CFE without charge, but you are not authorized to
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program developed by you or with the express written consent of Sun
Microsystems, Inc. ("Sun").

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distribution of Interface Definition Language CFE as permitted herein.

This license is effective until terminated by Sun for failure to comply
with this license.  Upon termination, you shall destroy or return all code
and documentation for the Interface Definition Language CFE.

INTERFACE DEFINITION LANGUAGE CFE IS PROVIDED AS IS WITH NO WARRANTIES OF
ANY KIND INCLUDING THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS
FOR A PARTICULAR PURPOSE, NONINFRINGEMENT, OR ARISING FROM A COURSE OF
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INTERFACE DEFINITION LANGUAGE CFE IS PROVIDED WITH NO SUPPORT AND WITHOUT
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TO ASSIST IN ITS USE, CORRECTION, MODIFICATION OR ENHANCEMENT.

SUN OR ANY OF ITS SUBSIDIARIES OR AFFILIATES SHALL HAVE NO LIABILITY WITH
RESPECT TO THE INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY
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*/

#ifndef _UTL_EXPRLIST_UTL_EXPRLIST_HH
#define _UTL_EXPRLIST_UTL_EXPRLIST_HH

#include "utl_list.h"

class AST_Expression;

// List of expressions.

// NOTE: This list class only works correctly because we use single public
//       inheritance, as opposed to multiple inheritance or public virtual.
//       It relies on a type-unsafe cast from UTL_List to subclasses, which
//       will cease to operate correctly if you use either multiple or
//       public virtual inheritance.

class TAO_IDL_FE_Export UTL_ExprList : public UTL_List
{
public:
  UTL_ExprList (AST_Expression *s, 
                UTL_ExprList *cdr);

  // Get list item.
  AST_Expression *head (void);

private:
  // Data.
  AST_Expression *pd_car_data;
};

// Active iterator for UTL_ExprList.
class   UTL_ExprlistActiveIterator : public UTL_ListActiveIterator
{
public:
  UTL_ExprlistActiveIterator (UTL_ExprList *s);

  // Get current item.
  AST_Expression *item (void);
};

#endif           // _UTL_EXPRLIST_UTL_EXPRLIST_HH