[gforth] / gforth / context-struct.fs

gforth: gforth/context-struct.fs

1 :	pazsan	1.1	\ Current object structure
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 :			\ This file is part of the Forth meta object protocol effort
21 :
22 :			[IFUNDEF] >o
23 :			user op \ object pointer
24 :			: o#+ ( #o -- a ) r> dup cell+ >r @ op @ + ; compile-only
25 :			: >o ( a -- r:a' ) r> op @ >r >r op ! ; compile-only
26 :			: o> ( r:a -- ) r> r> op ! >r ; compile-only
27 :			[THEN]
28 :
29 :			Variable do-field,
30 :
31 :			: o+ o#+ [ 0 , ] + ;
32 :
33 :			: field-context: ( xt-comp xt-int -- ) Create , , DOES> do-field, ! ;
34 :
35 :			' lit+ ' + field-context: default-field
36 :			' o#+ ' o+ field-context: current-field
37 :
38 :			default-field
39 :
40 :	pazsan	1.2	: context+field ( n1 n2 "name" -- n3 ) \ X:structures plus-field
41 :	pazsan	1.1	create-interpret/compile over , +
42 :			interpretation>
43 :			@ do-field, @ perform
44 :			<interpretation
45 :			compilation>
46 :			@ do-field, @ cell+ @ compile, ,
47 :			<compilation ;
48 :
49 :	pazsan	1.2	: context:field ['] context+field IS +field ;

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