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- // $Id: VSLDef.h,v 1.13 1998/11/23 17:43:42 zeller Exp $
- // VSL definition
-
- // Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
- // Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
- //
- // This file is part of DDD.
- //
- // DDD is free software; you can redistribute it and/or
- // modify it under the terms of the GNU General Public
- // License as published by the Free Software Foundation; either
- // version 2 of the License, or (at your option) any later version.
- //
- // DDD is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- // See the GNU General Public License for more details.
- //
- // You should have received a copy of the GNU General Public
- // License along with DDD -- see the file COPYING.
- // If not, write to the Free Software Foundation, Inc.,
- // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- //
- // DDD is the data display debugger.
- // For details, see the DDD World-Wide-Web page,
- // `http://www.cs.tu-bs.de/softech/ddd/',
- // or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
-
- #ifndef _DDD_VSLDef_h
- #define _DDD_VSLDef_h
-
- #ifdef __GNUG__
- #pragma interface
- #endif
-
-
- #include <limits.h>
- #include <iostream.h>
- #include "strclass.h"
- #include "bool.h"
- #include "VSLNode.h"
- #include "TypeInfo.h"
- #include "assert.h"
-
- class Box;
- class VSLDefList;
-
- class VSLDef {
- public:
- DECLARE_TYPE_INFO
-
- private:
- VSLNode *_expr; // Expr (definition body)
- VSLNode *_node_pattern; // Pattern
- Box *_box_pattern; // Compiled pattern
-
- unsigned _nargs; // Number of args
- bool _straight; // Flag: Can we use arg list `as is'?
-
- string _filename; // Position of definition
- int _lineno;
-
- VSLDef *_listnext; // next definition in VSLDefList
- VSLDef *_libnext; // next definition in VSLLib
- VSLDef *_libprev; // previous definition in VSLLib
-
- string args() const; // Create argument list
-
- bool being_compiled; // Protect against recursive compilePattern()
-
- public:
- VSLDefList *deflist; // Parent
-
- // Constructor
- VSLDef(VSLDefList* l, VSLNode *pattern, VSLNode *e = 0,
- string filename = "builtin", int lineno = 0);
-
- private:
- // `Dummy' copy constructor
- VSLDef(const VSLDef&);
-
- // `Dummy' assignment
- VSLDef& operator = (const VSLDef&);
-
- public:
- // Resources
- VSLNode*& expr() { return _expr; }
- VSLNode*& node_pattern() { return _node_pattern; }
- Box*& box_pattern() { return _box_pattern; }
- unsigned nargs() const { return _nargs; }
- bool straight() const { return _straight; }
-
- VSLDef*& listnext() { return _listnext; }
- VSLDef*& libnext() { return _libnext; }
- VSLDef*& libprev() { return _libprev; }
-
- VSLDef* listnext() const { return _listnext; }
- VSLDef* libnext() const { return _libnext; }
- VSLDef* libprev() const { return _libprev; }
-
- string func_name() const; // internal name (including args)
- string f_name() const; // external name (including args)
- string longname() const; // externak name (including args and loc)
-
- // Evaluate
- const Box *eval(Box *arg) const;
-
- // Backtrace (in error handling)
- static const VSLDef **backtrace;
- static const Box **backtrace_args;
-
- // Create box_pattern
- void compilePattern() const;
-
- // Destroy box_pattern
- void uncompilePattern() const
- {
- if (_box_pattern)
- ((VSLDef *)this)->_box_pattern->unlink();
- ((VSLDef *)this)->_box_pattern = 0;
- }
-
- // Resolve names
- int resolveNames();
-
- // Check if def matches ARG
- bool matches(const Box *arg) const;
- bool matches(const VSLNode *arg) const;
-
- // Convert arg into argument list
- ListBox *arglist(const Box *arg) const;
-
- // Extract instances
- VSLNode **nodelist(const VSLNode *arg) const;
-
- // Destructor
- virtual ~VSLDef();
-
- // Representation invariant
- virtual bool OK() const;
- };
-
- #endif
-