[gforth] / gforth / parsedto.fs

gforth: gforth/parsedto.fs

1 :	pazsan	1.1	\ -> (to/is replacement) recognizer
2 :
3 :			\ Copyright (C) 2012 Free Software Foundation, Inc.
4 :
5 :			\ This file is part of Gforth.
6 :
7 :			\ Gforth is free software; you can redistribute it and/or
8 :			\ modify it under the terms of the GNU General Public License
9 :			\ as published by the Free Software Foundation, either version 3
10 :			\ of the License, or (at your option) any later version.
11 :
12 :			\ This program is distributed in the hope that it will be useful,
13 :			\ but WITHOUT ANY WARRANTY; without even the implied warranty of
14 :			\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 :			\ GNU General Public License for more details.
16 :
17 :			\ You should have received a copy of the GNU General Public License
18 :			\ along with this program. If not, see http://www.gnu.org/licenses/.
19 :
20 :			' (int-to) ' (comp-to) ' lit, recognizer: r:to
21 :
22 :			: to-recognizer ( addr u -- xt r:to \| addr u r:fail )
23 :			2dup s" ->" string-prefix? 0= IF r:fail EXIT THEN
24 :			2dup 2 /string dup 0= IF 2drop r:fail EXIT THEN
25 :			find-name dup 0= IF drop r:fail EXIT THEN
26 :			name>comp drop nip nip r:to ;
27 :
28 :			' to-recognizer
29 :			forth-recognizer get-recognizers
30 :			1+ forth-recognizer set-recognizers