\ Simple debugging aids \ Copyright (C) 1995 Free Software Foundation, Inc. \ This file is part of Gforth. \ Gforth 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. \ This program 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 this program; if not, write to the Free Software \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. \ They are meant to support a different style of debugging than the \ tracing/stepping debuggers used in languages with long turn-around \ times. \ IMO, a much better (faster) way in fast-compilig languages is to add \ printing code at well-selected places, let the program run, look at \ the output, see where things went wrong, add more printing code, etc., \ until the bug is found. \ We support fast insertion and removal of the printing code. \ !!Warning: the default debugging actions will destroy the contents \ of the pictured numeric output string (i.e., don't use ~~ between <# \ and #>). require source.fs defer printdebugdata ( -- ) \ gforth ' .s IS printdebugdata defer printdebugline ( addr -- ) \ gforth : (printdebugline) ( addr -- ) cr print-sourcepos ." :" \ it would be nice to print the name of the following word, \ but that's not easily possible for primitives printdebugdata cr ; ' (printdebugline) IS printdebugline : (~~) ( -- ) r@ printdebugline r> sourcepos drop + >r ; : ~~ ( compilation -- ; run-time -- ) \ gforth tilde-tilde POSTPONE (~~) sourcepos, ; immediate