1 ! Copyright (C) 2004, 2010 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors arrays assocs definitions hashtables kernel
4 kernel.private math math.order namespaces quotations sequences
5 slots.private strings vocabs ;
6 FROM: assocs => change-at ;
10 { hashcode fixnum initial: 0 } name vocabulary
11 { def quotation initial: [ ] } props pic-def pic-tail-def
12 { sub-primitive read-only } ;
14 PRIMITIVE: optimized? ( word -- ? )
15 PRIMITIVE: word-code ( word -- start end )
18 PRIMITIVE: (word) ( name vocab hashcode -- word )
21 ! Need a dummy word here because BUILTIN: word is not a real word
22 ! and parse-datum looks for things that are actually words instead of
23 ! also looking for classes
24 : word ( -- * ) "dummy word" throw ;
26 : last-word ( -- word ) \ last-word get-global ;
28 : set-last-word ( word -- ) \ last-word set-global ;
30 M: word execute (execute) ;
33 [ [ name>> ] [ vocabulary>> ] bi 2array ] compare ;
35 M: word definer drop \ : \ ; ;
37 M: word definition def>> ;
39 : word-prop ( word name -- value ) swap props>> at ;
41 : remove-word-prop ( word name -- ) swap props>> delete-at ;
43 : remove-word-props ( word seq -- )
44 swap props>> [ delete-at ] curry each ;
46 : set-word-prop ( word value name -- )
48 [ pick props>> ?set-at >>props drop ]
49 [ nip remove-word-prop ] if ;
51 : change-word-prop ( ..a word prop quot: ( ..a value -- ..b newvalue ) -- ..b )
52 [ swap props>> ] dip change-at ; inline
56 : caller ( callstack -- word ) callstack>array <reversed> third ;
60 TUPLE: undefined-word word ;
62 : undefined ( -- * ) callstack caller undefined-word boa throw ;
64 : undefined-def ( -- quot )
65 #! 'f' inhibits tail call optimization in non-optimizing
66 #! compiler, ensuring that we can pull out the caller word
70 PREDICATE: deferred < word def>> undefined-def = ;
71 M: deferred definer drop \ DEFER: f ;
72 M: deferred definition drop f ;
74 PREDICATE: primitive < word "primitive" word-prop ;
75 M: primitive definer drop \ PRIMITIVE: f ;
76 M: primitive definition drop f ;
78 ERROR: invalid-primitive vocabulary word effect ;
79 : ensure-primitive ( vocabulary word effect -- )
81 [ drop vocabulary>> = ]
82 [ drop nip primitive? ]
83 [ [ nip "declared-effect" word-prop ] dip = ] 3tri and and
84 [ 3drop ] [ invalid-primitive ] if ;
86 : lookup-word ( name vocab -- word ) vocab-words-assoc at ;
88 : target-word ( word -- target )
89 [ name>> ] [ vocabulary>> ] bi lookup-word ;
91 SYMBOL: bootstrapping?
93 : if-bootstrapping ( true false -- )
94 [ bootstrapping? get ] 2dip if ; inline
96 : bootstrap-word ( word -- target )
97 [ target-word ] [ ] if-bootstrapping ;
99 GENERIC: crossref? ( word -- ? )
102 dup "forgotten" word-prop [ drop f ] [ vocabulary>> >boolean ] if ;
104 GENERIC: subwords ( word -- seq )
106 M: word subwords drop f ;
108 GENERIC: parent-word ( word -- word/f )
110 M: word parent-word drop f ;
112 : define ( word def -- )
113 over changed-definition [ ] like >>def drop ;
115 : changed-effect ( word -- )
116 [ changed-effects get add-to-unit ]
117 [ dup primitive? [ drop ] [ changed-definition ] if ] bi ;
119 : set-stack-effect ( effect word -- )
120 2dup "declared-effect" word-prop = [ 2drop ] [
121 [ nip changed-effect ]
122 [ nip subwords [ changed-effect ] each ]
123 [ swap "declared-effect" set-word-prop ]
127 : define-declared ( word def effect -- )
128 [ nip swap set-stack-effect ] [ drop define ] 3bi ;
130 : make-deprecated ( word -- )
131 t "deprecated" set-word-prop ;
133 : inline? ( obj -- ? )
134 dup word? [ "inline" word-prop ] [ drop f ] if ; inline
136 : recursive? ( obj -- ? )
137 dup word? [ "recursive" word-prop ] [ drop f ] if ; inline
139 : inline-recursive? ( obj -- ? )
141 dup "inline" word-prop
142 [ "recursive" word-prop ] [ drop f ] if
143 ] [ drop f ] if ; inline
145 ERROR: cannot-be-inline word ;
147 GENERIC: make-inline ( word -- )
150 dup inline? [ drop ] [
151 [ t "inline" set-word-prop ]
156 : define-inline ( word def effect -- )
157 [ define-declared ] [ 2drop make-inline ] 3bi ;
159 : make-recursive ( word -- )
160 t "recursive" set-word-prop ;
162 GENERIC: flushable? ( word -- ? )
165 [ "flushable" word-prop ]
166 [ parent-word dup [ flushable? ] when ] bi or ;
168 : make-flushable ( word -- )
169 t "flushable" set-word-prop ;
171 GENERIC: foldable? ( word -- ? )
174 [ "foldable" word-prop ]
175 [ parent-word dup [ foldable? ] when ] bi or ;
177 : make-foldable ( word -- )
178 dup make-flushable t "foldable" set-word-prop ;
180 GENERIC: reset-word ( word -- )
183 dup flushable? [ dup changed-conditionally ] when
185 "unannotated-def" "parsing" "inline" "recursive"
186 "foldable" "flushable" "reading" "writing" "reader"
187 "writer" "delimiter" "deprecated"
188 } remove-word-props ;
190 : reset-generic ( word -- )
191 [ subwords forget-all ]
205 : <word> ( name vocab -- word )
206 2dup [ hashcode ] bi@ hash-combine >fixnum (word) dup new-word ;
208 : <uninterned-word> ( name -- word )
209 f \ <uninterned-word> counter >fixnum (word)
210 new-words get [ dup new-word ] when ;
213 "( gensym )" <uninterned-word> ;
215 : define-temp ( quot effect -- word )
216 [ gensym dup ] 2dip define-declared ;
219 dup [ name>> ] [ vocabulary>> ] bi dup vocab-words-assoc
220 [ ] [ no-vocab ] ?if set-at ;
222 ERROR: bad-create name vocab ;
224 : check-create ( name vocab -- name vocab )
225 2dup [ string? ] [ [ string? ] [ vocab? ] bi or ] bi* and
226 [ bad-create ] unless ;
228 : create-word ( name vocab -- word )
229 check-create 2dup lookup-word
233 dup changed-definition
236 : constructor-word ( name vocab -- word )
237 [ "<" ">" surround ] dip create-word ;
239 PREDICATE: parsing-word < word "parsing" word-prop ;
241 M: parsing-word definer drop \ SYNTAX: \ ; ;
243 : define-syntax ( word quot -- )
244 [ drop ] [ define ] 2bi t "parsing" set-word-prop ;
246 : delimiter? ( obj -- ? )
247 dup word? [ "delimiter" word-prop ] [ drop f ] if ;
249 : deprecated? ( obj -- ? )
250 dup word? [ "deprecated" word-prop ] [ drop f ] if ;
252 ! Definition protocol
253 M: word where "loc" word-prop ;
255 M: word set-where swap "loc" set-word-prop ;
258 dup "forgotten" word-prop [ drop ] [
259 [ subwords forget-all ]
260 [ [ name>> ] [ vocabulary>> vocab-words-assoc ] bi delete-at ]
261 [ t "forgotten" set-word-prop ]
266 nip 1 slot { fixnum } declare ; inline foldable
268 M: word literalize <wrapper> ;
270 INSTANCE: word definition-mixin