Mercurial > octave-nkf
view libinterp/parse-tree/pt.h @ 20623:e34692daf663
Extend parser to accept '_' in numbers.
* NEWS: Announce change.
* lex.ll: Define NUMBER to be a NUMREAL (real number) or NUMHEX (hex number).
Define NUMREAL to begin with a digit (D) followed by more digits or an '_'.
Define NUMHEX to begin with 0[xX], a hex digit (a-fA-F0-9), followed by '_' or
more hex digits.
Define EXPON to have a digit (D) followed by more digits or an '_'.
* lex.ll (octave_base_lexer::handle_number): Strip out any underscores before
processing number with sscanf.
* parser.tst: Add tests for new behavior.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 05 Oct 2015 14:05:58 -0700 |
parents | 4197fc428c7d |
children |
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/* Copyright (C) 1996-2015 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 <string> #include <iosfwd> class octave_function; class tree_walker; // Base class for the parse tree. class tree { public: tree (int l = -1, int c = -1) : line_num (l), column_num (c), bp (false) { } 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 (void) { bp = true; } virtual void delete_breakpoint (void) { bp = false; } bool is_breakpoint (void) const { return bp; } 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. bool bp; // No copying! tree (const tree&); tree& operator = (const tree&); }; #endif