[gforth] / gforth / recover-endtry.fs

gforth: gforth/recover-endtry.fs

1 :	anton	1.2	\ provide TRY...RECOVER...ENDTRY on newer Gforths
2 :	anton	1.1
3 :			\ Copyright (C) 2007 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 2
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, write to the Free Software
19 :			\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20 :
21 :
22 :			\ this provides the old-style TRY...RECOVER...ENDTRY syntax, but after
23 :			\ loading this file the system will be incompatible with the new-style
24 :			\ TRY syntax.
25 :
26 :			[undefined] recover [if]
27 :
28 :			: recover postpone endtry-iferror ; immediate compile-only
29 :			: endtry postpone then ; immediate compile-only
30 :
31 :			\ now undefine the new words
32 :			: iferror -13 throw ; immediate
33 :			: restore -13 throw ; immediate
34 :			: endtry-iferror -13 throw ; immediate
35 :			[then]