version 1.4, 1995/11/07 18:06:43
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version 1.13, 2008/07/15 16:11:49
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\ recursive descent parser generator ) |
\ recursive descent parser generator ) |
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\ Copyright (C) 1995,1996,1997,2000,2003,2007,2008 Free Software Foundation, Inc. |
\ Copyright 1990, 1991, 1994 Martin Anton Ertl |
\ Copyright 1990, 1991, 1994 Martin Anton Ertl |
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\ This program is free software; you can redistribute it and/or modify |
\ This file is part of Gforth. |
\ it under the terms of the GNU General Public License as published by |
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\ the Free Software Foundation; either version 2 of the License, or |
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\ (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
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\ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
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\ along with this program; if not, write to the Free Software |
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\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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\ ANS FORTH prolog |
\ Gforth is free software; you can redistribute it and/or |
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\ modify it under the terms of the GNU General Public License |
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\ as published by the Free Software Foundation, either version 3 |
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\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
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\ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
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\ along with this program. If not, see http://www.gnu.org/licenses/. |
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\ ANS FORTH prologue |
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: defined? ( "word" -- flag ) bl word find nip ; |
: defined? ( "word" -- flag ) bl word find nip ; |
defined? WARNINGS 0= |
defined? WARNINGS 0= |
Line 308 aligned constant syntax-expr \ length
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Line 310 aligned constant syntax-expr \ length
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\ the following is just a dummy |
\ the following is just a dummy |
[ s" gforth" environment? ] |
[ s" gforth" environment? ] |
[IF] [ 2drop ] |
[IF] [ 2drop ] |
0 loadline @ 2, |
0 sourceline# 2, |
[ELSE] |
[ELSE] |
[ s" bigFORTH" environment? ] |
[ s" bigFORTH" environment? ] |
[IF] [ 2drop ] |
[IF] [ 2drop ] |
Line 744 constant nt-syntax-expr
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Line 746 constant nt-syntax-expr
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: generate-nt \ -- ) |
: generate-nt \ -- ) |
\ generates a call to the code for the rule ) |
\ generates a call to the code for the rule ) |
\ since the code needs not be generated yet, an indirect call is used ) |
\ since the code needs not be generated yet, an indirect call is used ) |
exec postpone literal |
exec dup @ if |
postpone @ |
@ compile, |
postpone execute ; |
else |
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postpone literal |
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postpone @ |
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postpone execute |
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endif ; |
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: pass2-nt \ -- ) |
: pass2-nt \ -- ) |
\ apart from the usual duties, this pass2 also has to code-nt ) |
\ apart from the usual duties, this pass2 also has to code-nt ) |