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-/*
-
-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
-license or distribute it to anyone else except as part of a product or
-program developed by you or with the express written consent of Sun
-Microsystems, Inc. ("Sun").
-
-The names of Sun Microsystems, Inc. and any of its subsidiaries or
-affiliates may not be used in advertising or publicity pertaining to
-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
-DEALING, USAGE OR TRADE PRACTICE.
-
-INTERFACE DEFINITION LANGUAGE CFE IS PROVIDED WITH NO SUPPORT AND WITHOUT
-ANY OBLIGATION ON THE PART OF Sun OR ANY OF ITS SUBSIDIARIES OR AFFILIATES
-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
-INTERFACE DEFINITION LANGUAGE CFE OR ANY PART THEREOF.
-
-IN NO EVENT WILL SUN OR ANY OF ITS SUBSIDIARIES OR AFFILIATES BE LIABLE FOR
-ANY LOST REVENUE OR PROFITS OR OTHER SPECIAL, INDIRECT AND CONSEQUENTIAL
-DAMAGES, EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
-
-Use, duplication, or disclosure by the government is subject to
-restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in
-Technical Data and Computer Software clause at DFARS 252.227-7013 and FAR
-52.227-19.
-
-Sun, Sun Microsystems and the Sun logo are trademarks or registered
-trademarks of Sun Microsystems, Inc.
-
-SunSoft, Inc.
-2550 Garcia Avenue
-Mountain View, California 94043
-
-NOTE:
-
-SunOS, SunSoft, Sun, Solaris, Sun Microsystems or the Sun logo are
-trademarks or registered trademarks of Sun Microsystems, Inc.
-
- */
-
-#ifndef _UTL_STACK_UTL_STACK_HH
-#define _UTL_STACK_UTL_STACK_HH
-
-// utl_stack.hh - Defines the UTL_ScopeStack class - a stack of scopes
-//
-// UTL_ScopeStack implements scope nesting
-
-/*
-** DEPENDENCIES: utl_scope.hh
-**
-** USE: Included from util.hh
-*/
-
-// Forward declaration of active iterator for UTL_ScopeStack
-class UTL_ScopeStackActiveIterator;
-
-class UTL_ScopeStack
-{
-public:
- // Operations
-
- // Constructor and destructor
- UTL_ScopeStack();
- virtual ~UTL_ScopeStack();
-
- // Return top element
- virtual UTL_Scope *top();
-
- // Pop top element
- virtual void pop();
-
- // Clear entire stack
- virtual void clear();
-
- // Push an element on the stack and return stack
- virtual UTL_ScopeStack *push(UTL_Scope *el);
-
- // How deep is the stack now?
- virtual unsigned long depth();
-
- // Return bottom element
- virtual UTL_Scope *bottom();
-
- // Return (top - 1) element
- virtual UTL_Scope *next_to_top();
-
- // return topmost non-NULL element
- virtual UTL_Scope *top_non_null();
-
-private:
- // Data
- UTL_Scope **pd_stack_data; // Store scopes stack
- unsigned long pd_stack_data_nalloced; // How many allocated?
- unsigned long pd_stack_top; // How many used?
-
- // Friend active iterator class for UTL_ScopeStack
- friend class UTL_ScopeStackActiveIterator;
-};
-
-// Active iterator for UTL_ScopeStack
-class UTL_ScopeStackActiveIterator
-{
-public:
- // Operations
-
- // Constructor
- UTL_ScopeStackActiveIterator(UTL_ScopeStack *s);
-
- // Advance to next element
- virtual void next();
-
- // Get current item
- virtual UTL_Scope *item();
-
- // Is the iteration finished?
- virtual long is_done();
-
-private:
- // Data
- UTL_ScopeStack *source; // On what to iterate?
- long il; // Where are we in iteration?
-};
-
-#endif // _UTL_STACK_UTL_STACK_HH