1 ! Copyright (C) 2007, 2009 Slava Pestov, Eduardo Cavazos.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors arrays assocs combinators continuations
4 effects.parser fry generic.parser kernel lexer locals.errors
5 locals.rewrite.closures locals.types make namespaces parser
6 quotations sequences splitting vocabs.parser words ;
11 : ?rewrite-closures ( form -- form' )
12 in-lambda? get [ 1array ] [ rewrite-closures ] if ;
14 ERROR: invalid-local-name name ;
16 : check-local-name ( name -- name )
17 dup { "]" "]!" } member? [ throw-invalid-local-name ] when ;
19 : make-local ( name -- word )
20 check-local-name "!" ?tail [
22 dup <local-writer> dup name>> ,,
26 : make-locals ( seq -- words assoc )
27 [ [ make-local ] map ] H{ } make ;
29 : parse-local-defs ( -- words assoc )
30 "|" parse-tokens make-locals ;
32 SINGLETON: lambda-parser
34 : with-lambda-scope ( assoc reader-quot: ( -- quot ) -- quot )
37 lambda-parser quotation-parser set
39 qualified-vocabs pop* ! can't use unuse-words here
42 : (parse-lambda) ( assoc -- quot )
43 [ \ ] parse-until >quotation ] with-lambda-scope ;
45 : parse-lambda ( -- lambda )
47 (parse-lambda) <lambda>
50 : parse-multi-def ( -- multi-def assoc )
51 ")" parse-tokens make-locals [ <multi-def> ] dip ;
53 : parse-single-def ( name -- def assoc )
54 [ make-local <def> ] H{ } make ;
56 : update-locals ( assoc -- )
57 qualified-vocabs last words>> swap assoc-union! drop ;
59 : parse-def ( name/paren -- def )
60 dup "(" = [ drop parse-multi-def ] [ parse-single-def ] if update-locals ;
62 M: lambda-parser parse-quotation ( -- quotation )
63 H{ } clone (parse-lambda) ;
65 : parse-binding ( end -- pair/f )
67 { [ 2dup = ] [ 2drop f ] }
68 [ nip scan-object 2array ]
71 : parse-let ( -- form )
72 H{ } clone (parse-lambda) <let> ?rewrite-closures ;
74 : parse-locals ( -- effect vars assoc )
77 in>> [ dup pair? [ first ] when ] map make-locals ;
79 : (parse-locals-definition) ( effect vars assoc reader-quot -- word quot effect )
80 with-lambda-scope <lambda>
81 [ nip "lambda" set-word-prop ]
82 [ nip rewrite-closures dup length 1 = [ first ] [ throw-bad-rewrite ] if ]
83 [ drop nip ] 3tri ; inline
85 : parse-locals-definition ( word reader-quot -- word quot effect )
86 [ parse-locals ] dip (parse-locals-definition) ; inline
88 : parse-locals-method-definition ( word reader -- word quot effect )
89 [ parse-locals pick check-method-effect ] dip
90 (parse-locals-definition) ; inline
92 : (::) ( -- word def effect )
96 parse-locals-definition
99 : (M::) ( -- word def )
104 parse-locals-method-definition drop
105 ] with-method-definition