104 lines
2.7 KiB
Factor
104 lines
2.7 KiB
Factor
! Copyright (C) 2005, 2006 Slava Pestov.
|
|
! See http://factorcode.org/license.txt for BSD license.
|
|
IN: generic
|
|
USING: arrays definitions errors hashtables kernel
|
|
kernel-internals math namespaces parser sequences
|
|
sequences-internals strings vectors words ;
|
|
|
|
IN: kernel-internals
|
|
|
|
: tuple= ( tuple tuple -- ? )
|
|
2dup [ array-capacity ] 2apply number= [
|
|
dup array-capacity
|
|
[ 2dup swap array-nth >r pick array-nth r> = ] all? 2nip
|
|
] [
|
|
2drop f
|
|
] if ;
|
|
|
|
IN: generic
|
|
|
|
: class ( object -- class )
|
|
dup tuple? [ 2 slot ] [ type type>class ] if ; inline
|
|
|
|
: tuple-predicate ( word -- )
|
|
dup predicate-word [
|
|
[ dup tuple? ] %
|
|
[ [ 2 slot ] % over literalize , \ eq? , ] [ ] make ,
|
|
[ [ drop f ] if ] %
|
|
] [ ] make define-predicate ;
|
|
|
|
: forget-tuple ( class -- )
|
|
dup forget "predicate" word-prop first [ forget ] when* ;
|
|
|
|
: check-shape ( word slots -- )
|
|
>r in get lookup dup [
|
|
dup "tuple-size" word-prop r> length 2 + =
|
|
[ drop ] [ forget-tuple ] if
|
|
] [
|
|
r> 2drop
|
|
] if ;
|
|
|
|
: delegate-slots { { 3 object delegate set-delegate } } ;
|
|
|
|
: tuple-slots ( tuple slots -- )
|
|
2dup "slot-names" set-word-prop
|
|
2dup length 2 + "tuple-size" set-word-prop
|
|
dupd 4 simple-slots
|
|
2dup delegate-slots swap append "slots" set-word-prop
|
|
define-slots ;
|
|
|
|
PREDICATE: class tuple-class "tuple-size" word-prop ;
|
|
|
|
TUPLE: check-tuple class ;
|
|
: check-tuple ( class -- class )
|
|
dup tuple-class? [ <check-tuple> throw ] unless ;
|
|
|
|
: define-constructor ( word class def -- )
|
|
pick reset-generic
|
|
swap check-tuple [
|
|
dup literalize ,
|
|
"tuple-size" word-prop ,
|
|
\ <tuple> , %
|
|
] [ ] make define-compound ;
|
|
|
|
: default-constructor ( tuple -- )
|
|
dup create-constructor 2dup "constructor" set-word-prop
|
|
swap dup "slots" word-prop unclip drop <reversed>
|
|
[ [ tuck ] swap peek add ] map concat >quotation
|
|
define-constructor ;
|
|
|
|
: define-tuple ( tuple slots -- )
|
|
2dup check-shape
|
|
>r create-in
|
|
dup intern-symbol
|
|
dup tuple-predicate
|
|
dup \ tuple bootstrap-word "superclass" set-word-prop
|
|
dup define-class
|
|
dup r> tuple-slots
|
|
default-constructor ;
|
|
|
|
M: tuple clone
|
|
(clone) dup delegate clone over set-delegate ;
|
|
|
|
M: tuple hashcode 2 slot hashcode ;
|
|
|
|
M: tuple equal?
|
|
over tuple? [ tuple= ] [ 2drop f ] if ;
|
|
|
|
: (delegates) ( obj -- )
|
|
[ dup delegate (delegates) , ] when* ;
|
|
|
|
: delegates ( obj -- seq )
|
|
[ (delegates) ] { } make ;
|
|
|
|
: is? ( obj pred -- ? )
|
|
>r delegates r> contains? ; inline
|
|
|
|
: >tuple ( seq -- tuple )
|
|
>vector dup first "tuple-size" word-prop over set-length
|
|
>array array>tuple ;
|
|
|
|
! Definition protocol
|
|
M: tuple-class forget
|
|
dup "constructor" word-prop forget forget-class ;
|