1: \ Interpretation semantics
2:
3: \ Copyright (C) 1996 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., 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21:
22: \ This file defines a mechanism for specifying special interpretation
23: \ semantics as well as the interpretation semantics of several words.
24:
25: table constant interpretation-semantics
26:
27: :noname ( c-addr u word-ident -- )
28: \ word-ident is currently an xt, but it might be the nfa
29: sp@ cell interpretation-semantics search-wordlist
30: if ( c-addr u word-ident xt )
31: nip nip nip execute
32: else
33: defers interpret-special
34: endif ;
35: IS interpret-special
36:
37: : interpretation: ( -- colon-sys ) \ gforth
38: \G make the last word one with special interpretation semantics and
39: \G start the (colon) definition of these semantics.
40: \ !! fix reveal such that it is not necessary to do it before the
41: \ set-current
42: restrict
43: lastcfa cell nextname \ !! use nfa instead of cfa
44: get-current >r
45: interpretation-semantics set-current : reveal
46: r> set-current ;
47:
48: \ : foo
49: \ ." compilation semantics" ; immediate
50: \ interpretation:
51: \ ." interpretation semantics" ;
52:
53: \ foo \ interpretation semantics ok
54: \ : xxx foo ; \ compilation semantics ok
55: \ : yyy postpone foo ; \ ok
56: \ yyy \ compilation semantics ok
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