Annotation of gforth/struct0x.fs, revision 1.4
1.1 anton 1: \ implementation of Forth 200x structures
2:
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
1.2 anton 9: \ as published by the Free Software Foundation, either version 3
1.1 anton 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
1.2 anton 18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1 anton 19:
1.4 ! pazsan 20: : standard+field ( n1 n2 "name" -- n3 ) \ X:structures plus-field
1.1 anton 21: over if
22: (field) over ,
23: else
24: create dozerofield
25: then
26: + ;
27:
1.4 ! pazsan 28: Defer +field
! 29: \ A number of things have field-like structure, but not
! 30: \ exactly field-like behavior. Objects, locals, etc.
! 31: \ Allow them to plug into +field.
! 32:
! 33: : standard:field ( -- )
! 34: \g set +field to standard behavior
! 35: ['] standard+field IS +field ;
! 36:
! 37: standard:field
! 38:
1.3 pazsan 39: : extend-structure ( n "name" -- struct-sys n ) \ Gforth
40: \g extend an existing structure
1.4 ! pazsan 41: standard:field >r 0 value lastxt >body r> ;
1.3 pazsan 42:
1.1 anton 43: : begin-structure ( "name" -- struct-sys 0 ) \ X:structures
1.3 pazsan 44: 0 extend-structure ;
1.1 anton 45:
46: : end-structure ( struct-sys +n -- ) \ X:structures
47: swap ! ;
48:
49: : cfield: ( u1 "name" -- u2 ) \ X:structures
50: 1 +field ;
51:
52: : field: ( u1 "name" -- u2 ) \ X:structures
53: aligned cell +field ;
54:
55: : 2field: ( u1 "name" -- u2 ) \ gforth
56: aligned 2 cells +field ;
57:
58: : ffield: ( u1 "name" -- u2 ) \ X:structures
59: faligned 1 floats +field ;
60:
61: : sffield: ( u1 "name" -- u2 ) \ X:structures
62: sfaligned 1 sfloats +field ;
63:
64: : dffield: ( u1 "name" -- u2 ) \ X:structures
65: dfaligned 1 dfloats +field ;
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