// $Id$ // ArgNode class // Copyright (C) 1995 Technische Universitaet Braunschweig, Germany. // Written by Andreas Zeller <zeller@gnu.org>. // // 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 3 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, see <http://www.gnu.org/licenses/>. // // DDD is the data display debugger. // For details, see the DDD World-Wide-Web page, // `http://www.gnu.org/software/ddd/', // or send a mail to the DDD developers <ddd@gnu.org>. #ifndef _DDD_ArgNode_h #define _DDD_ArgNode_h // Upon run-time, an ArgNode evaluates an argument from the argument list // ArgNodes may be used for pattern matching. // If 'ArgNode::matchAll' is set, an ArgNode matches all other VSL nodes. // If 'ArgNode::matchCallback' is set, matching calls a function with // the matched node as argument. #include "assert.h" #include <iostream> #include "strclass.h" #include "VSLNode.h" #include "DummyNode.h" // ArgNode typedef void (*ArgNodeFunc)(int, const VSLNode *); class ArgNode: public DummyNode { public: DECLARE_TYPE_INFO private: unsigned _id; // #Argument in arglist: erstes 0, zweites 1... protected: ArgNode(const ArgNode& node): DummyNode(node), _id(node._id) {} bool matches(const VSLNode &node) const; void dump(std::ostream& s) const; void _dumpTree(std::ostream& s) const; public: // Constructor ArgNode(unsigned i, const char *type = "ArgNode"): DummyNode(type), _id(i) {} // Copy VSLNode *dup() const { return new ArgNode(*this); } // Evaluate const Box *_eval(ListBox *arglist) const; int instantiateArgs(VSLDef *cdef, VSLNode **node, VSLNode *values[], unsigned base, unsigned n); void countArgNodes(VSLDef *cdef, int instances[], unsigned base, unsigned n); bool isConst() const { return false; } bool isArgNode() const { return true; } unsigned id() const { return _id; } unsigned nargs() const { return 1; } static ArgNodeFunc matchCallback; // Call when matching }; #endif