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| 1 : | anton | 1.1 | \ 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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