1 ! Copyright (C) 2009 Slava Pestov, Doug Coleman.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors arrays assocs classes classes.tuple
4 effects.parser fry generalizations generic.standard kernel
5 lexer locals macros parser sequences sets slots vocabs words ;
10 : initializer-name ( class -- word )
11 name>> "initialize-" prepend ;
13 : lookup-initializer ( class -- word/f )
14 initializer-name "initializers" lookup ;
16 : initializer-word ( class -- word )
18 "initializers" create-vocab create
19 [ t "initializer" set-word-prop ] [ ] bi ;
21 : define-initializer-generic ( name -- )
22 initializer-word (( object -- object )) define-simple-generic ;
24 : define-initializer ( class def -- )
25 [ drop define-initializer-generic ]
26 [ [ dup lookup-initializer ] dip H{ } clone define-typecheck ] 2bi ;
28 : all-slots-assoc ( class -- slots )
29 superclasses [ [ "slots" word-prop ] keep '[ _ ] { } map>assoc ] map concat ;
31 MACRO:: slots>constructor ( class slots -- quot )
32 class all-slots-assoc slots [ '[ first name>> _ = ] find-last nip ] with map :> slot-assoc
33 class all-slots-assoc [ [ ] [ first initial>> ] bi ] { } map>assoc :> default-params
37 _ narray slot-assoc swap zip
38 default-params swap assoc-union values _ firstn class boa
41 ERROR: repeated-constructor-parameters class effect ;
43 ERROR: unknown-constructor-parameters class effect unknown ;
45 : ensure-constructor-parameters ( class effect -- class effect )
46 dup in>> all-unique? [ repeated-constructor-parameters ] unless
47 2dup [ all-slots [ name>> ] map ] [ in>> ] bi* swap diff
48 [ unknown-constructor-parameters ] unless-empty ;
50 :: (define-constructor) ( constructor-word class effect def -- word quot )
52 class def define-initializer
53 class effect in>> '[ _ _ slots>constructor ] ;
55 :: define-constructor ( constructor-word class effect def reverse? -- )
56 constructor-word class effect def (define-constructor)
57 class superclasses [ lookup-initializer ] map sift
58 reverse? [ reverse ] when
59 '[ @ _ [ execute( obj -- obj ) ] each ] effect define-declared ;
61 : scan-constructor ( -- word class )
62 scan-word [ name>> "<" ">" surround create-in dup reset-generic ] keep ;
64 : parse-constructor ( -- class word effect def )
65 scan-constructor complete-effect ensure-constructor-parameters
68 SYNTAX: CONSTRUCTOR: parse-constructor f define-constructor ;
70 "initializers" create-vocab drop