Mercurial > octave
view libinterp/parse-tree/pt.h @ 23219:3ac9f9ecfae5 stable
maint: Update copyright dates.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 22 Feb 2017 12:39:29 -0500 |
parents | e9a0469dedd9 |
children | 092078913d54 |
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/* Copyright (C) 1996-2017 John W. Eaton This file is part of Octave. Octave 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. Octave 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 Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if ! defined (octave_pt_h) #define octave_pt_h 1 #include "octave-config.h" #include <string> #include <iosfwd> class octave_function; class tree_walker; class bp_table; bool meets_condition (std::string *); // Base class for the parse tree. class tree { public: tree (int l = -1, int c = -1) : line_num (l), column_num (c), bp (NULL) { } virtual ~tree (void) { } virtual int line (void) const { return line_num; } virtual int column (void) const { return column_num; } void line (int l) { line_num = l; } void column (int c) { column_num = c; } void set_location (int l, int c) { line_num = l; column_num = c; } virtual void set_breakpoint (const std::string& condition) { if (bp) *bp = condition; else bp = new std::string(condition); } virtual void delete_breakpoint (void) { if (bp) delete bp; bp = NULL; } bool meets_bp_condition (void) const; bool is_breakpoint (bool check_active = false) const { return bp && (!check_active || meets_bp_condition ()); } // breakpoint condition, or "0" (i.e., "false") if no breakpoint. // To distinguish "0" from a disabled breakpoint, test "is_breakpoint" too. const std::string bp_cond (void) const { return bp ? *bp : std::string("0"); } std::string str_print_code (void); virtual void accept (tree_walker& tw) = 0; private: // The input line and column where we found the text that was // eventually converted to this tree node. int line_num; int column_num; // Breakpoint flag: NULL if no breakpoint, or the condition if there is one std::string *bp; // No copying! tree (const tree&); tree& operator = (const tree&); }; #endif