1 ! Copyright (C) 2008, 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors arrays assocs byte-arrays byte-vectors classes
4 combinators definitions effects fry generic generic.single
5 generic.standard hashtables io.binary io.streams.string kernel
6 kernel.private math math.parser namespaces parser sbufs
7 sequences splitting splitting.private strings vectors words ;
10 GENERIC: specializer-predicate ( spec -- quot )
12 M: class specializer-predicate "predicate" word-prop ;
14 M: object specializer-predicate '[ _ eq? ] ;
16 GENERIC: specializer-declaration ( spec -- class )
18 M: class specializer-declaration ;
20 M: object specializer-declaration class ;
22 : specializer ( word -- specializer )
23 "specializer" word-prop ;
25 : make-specializer ( specs -- quot )
27 [ (picker) 2array ] 2map
28 [ drop object eq? not ] assoc-filter
30 [ swap specializer-predicate append ] { } assoc>map
31 [ ] [ swap [ f ] \ if 3array append [ ] like ] map-reduce
34 : specializer-cases ( quot specializer -- alist )
35 dup [ array? ] all? [ 1array ] unless [
36 [ nip make-specializer ]
37 [ [ specializer-declaration ] map swap '[ _ declare @ ] ] 2bi
38 ] with { } map>assoc ;
40 : specialize-quot ( quot word specializer -- quot' )
41 [ drop nip def>> ] [ nip specializer-cases ] 3bi alist>quot ;
43 ! compiler.tree.propagation.inlining sets this to f
44 SYMBOL: specialize-method?
46 t specialize-method? set-global
48 : method-declaration ( method -- quot )
49 [ "method-generic" word-prop dispatch# object <array> ]
50 [ "method-class" word-prop ]
51 bi prefix [ declare ] curry [ ] like ;
53 : specialize-method ( quot method -- quot' )
54 [ specialize-method? get [ method-declaration prepend ] [ drop ] if ]
55 [ dup "method-generic" word-prop specializer ] bi
56 [ specialize-quot ] [ drop ] if* ;
58 : standard-method? ( method -- ? )
60 "method-generic" word-prop standard-generic?
63 : (specialized-def) ( word -- quot )
65 dup generic? [ drop ] [
66 [ dup standard-method? [ specialize-method ] [ drop ] if ]
67 [ dup specializer [ specialize-quot ] [ drop ] if* ]
71 ERROR: type-mismatch-error word expected-types ;
73 : typed-stack-effect? ( effect -- ? )
74 [ object = ] all? not ;
76 : type-mismatch-quot ( word types -- quot )
77 [ type-mismatch-error ] 2curry ;
79 : make-coercer ( types -- quot )
80 [ "coercer" word-prop [ ] or ]
81 [ swap \ dip [ ] 2sequence prepend ]
84 : typed-inputs ( quot word -- quot' )
85 dup stack-effect effect-in-types {
87 [ 2nip make-specializer ]
88 [ nip swap '[ _ declare @ ] ]
89 [ [ drop ] 2dip type-mismatch-quot ]
90 } 3cleave '[ @ @ _ _ if ] ;
92 : specialized-def ( word -- quot )
93 [ (specialized-def) ] keep
94 dup stack-effect effect-in-types typed-stack-effect?
95 [ typed-inputs ] [ drop ] if ;
97 : specialized-length ( specializer -- n )
98 dup [ array? ] all? [ first ] when length ;
101 scan-object dup wrapper? [ wrapped>> ] when
102 [ changed-definition ]
103 [ subwords [ changed-definition ] each ]
104 [ parse-definition { } like "specializer" set-word-prop ] tri ;
106 ! Default specializers
107 { first first2 first3 first4 }
108 [ { array } "specializer" set-word-prop ] each
111 { vector } "specializer" set-word-prop
114 \ push { { vector } { sbuf } } "specializer" set-word-prop
116 \ last { { vector } } "specializer" set-word-prop
118 \ set-last { { object vector } } "specializer" set-word-prop
121 { { string sbuf } { array vector } { byte-array byte-vector } }
122 "specializer" set-word-prop
125 { { string string } { array array } }
126 "specializer" set-word-prop
129 { { fixnum fixnum string } { fixnum fixnum array } }
130 "specializer" set-word-prop
133 { { string } { array } }
134 "specializer" set-word-prop
138 "specializer" set-word-prop
140 \ >string { sbuf } "specializer" set-word-prop
142 \ >array { { vector } } "specializer" set-word-prop
144 \ >vector { { array } { vector } } "specializer" set-word-prop
146 \ >sbuf { string } "specializer" set-word-prop
148 \ split, { string string } "specializer" set-word-prop
150 \ memq? { array } "specializer" set-word-prop
152 \ member? { array } "specializer" set-word-prop
154 \ assoc-stack { vector } "specializer" set-word-prop
156 \ >le { { fixnum fixnum } { bignum fixnum } } "specializer" set-word-prop
158 \ >be { { bignum fixnum } { fixnum fixnum } } "specializer" set-word-prop
160 \ base> { string fixnum } "specializer" set-word-prop
162 M\ hashtable at* { { fixnum object } { word object } } "specializer" set-word-prop
164 M\ hashtable set-at { { object fixnum object } { object word object } } "specializer" set-word-prop