factor/extra/constructors/constructors.factor

65 lines
2.2 KiB
Factor

! Copyright (C) 2009 Slava Pestov, Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors assocs classes classes.tuple effects
effects.parser fry kernel lexer locals macros parser
sequences sequences.generalizations sets vocabs vocabs.parser
words alien.parser ;
IN: constructors
: all-slots-assoc ( class -- slots )
superclasses-of [
[ "slots" word-prop ] keep '[ _ ] { } map>assoc
] map concat ;
MACRO:: slots>boa ( slots class -- quot )
class all-slots-assoc slots [ '[ first name>> _ = ] find-last nip ] with map :> slot-assoc
class all-slots-assoc [ [ ] [ first initial>> ] bi ] { } map>assoc :> default-params
slots length
default-params length
'[
_ narray slot-assoc swap zip
default-params swap assoc-union values _ firstn class boa
] ;
ERROR: repeated-constructor-parameters class effect ;
ERROR: unknown-constructor-parameters class effect unknown ;
: ensure-constructor-parameters ( class effect -- class effect )
dup in>> all-unique? [ repeated-constructor-parameters ] unless
2dup [ all-slots [ name>> ] map ] [ in>> ] bi* swap diff
[ unknown-constructor-parameters ] unless-empty ;
: constructor-boa-quot ( constructor-word class effect -- word quot )
in>> swap '[ _ _ slots>boa ] ; inline
: define-constructor ( constructor-word class effect -- )
ensure-constructor-parameters
[ constructor-boa-quot ] keep define-declared ;
: create-reset ( string -- word )
create-word-in dup reset-generic ;
: scan-constructor ( -- word class )
scan-new-word scan-class ;
: parse-constructor ( -- word class effect def )
scan-constructor scan-effect ensure-constructor-parameters
parse-definition ;
SYNTAX: CONSTRUCTOR:
parse-constructor
[ [ constructor-boa-quot ] dip compose ]
[ drop ] 2bi define-declared ;
: scan-rest-input-effect ( -- effect )
")" parse-effect-tokens nip
{ "obj" } <effect> ;
: scan-full-input-effect ( -- effect )
"(" expect scan-rest-input-effect ;
SYNTAX: SLOT-CONSTRUCTOR:
scan-new-word [ name>> "(" append create-reset ] keep
'[ scan-rest-input-effect in>> _ '[ _ _ slots>boa ] append! ] define-syntax ;