149 lines
4.5 KiB
Factor
149 lines
4.5 KiB
Factor
! Copyright (C) 2008 James Cash
|
|
! See http://factorcode.org/license.txt for BSD license.
|
|
USING: kernel peg sequences arrays strings combinators.lib
|
|
namespaces combinators math locals locals.private locals.backend accessors
|
|
vectors syntax lisp.parser assocs parser sequences.lib words
|
|
quotations fry lists summary combinators.short-circuit ;
|
|
IN: lisp
|
|
|
|
DEFER: convert-form
|
|
DEFER: funcall
|
|
DEFER: lookup-var
|
|
DEFER: lookup-macro
|
|
DEFER: lisp-macro?
|
|
DEFER: lisp-var?
|
|
DEFER: macro-expand
|
|
DEFER: define-lisp-macro
|
|
|
|
ERROR: no-such-var variable-name ;
|
|
M: no-such-var summary drop "No such variable" ;
|
|
|
|
! Functions to convert s-exps to quotations
|
|
! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
: convert-body ( cons -- quot )
|
|
[ ] [ convert-form compose ] foldl ; inline
|
|
|
|
: convert-begin ( cons -- quot )
|
|
cdr [ convert-form ] [ ] lmap-as '[ , [ call ] each ] ;
|
|
|
|
: convert-cond ( cons -- quot )
|
|
cdr [ 2car [ convert-form ] bi@ [ '[ @ call ] ] dip 2array ]
|
|
{ } lmap-as '[ , cond ] ;
|
|
|
|
: convert-general-form ( cons -- quot )
|
|
uncons [ convert-body ] [ convert-form ] bi* '[ , @ funcall ] ;
|
|
|
|
! words for convert-lambda
|
|
<PRIVATE
|
|
: localize-body ( assoc body -- assoc newbody )
|
|
{
|
|
{ [ dup list? ] [ [ lisp-symbol? ] pick '[ [ name>> , at ] [ ] bi or ] traverse ] }
|
|
{ [ dup lisp-symbol? ] [ name>> over at ] }
|
|
[ ]
|
|
} cond ;
|
|
|
|
: localize-lambda ( body vars -- newvars newbody )
|
|
make-locals dup push-locals swap
|
|
[ swap localize-body convert-form swap pop-locals ] dip swap ;
|
|
|
|
: split-lambda ( cons -- body-cons vars-seq )
|
|
cdr uncons [ car ] [ [ name>> ] lmap>array ] bi* ; inline
|
|
|
|
: rest-lambda ( body vars -- quot )
|
|
"&rest" swap [ index ] [ remove ] 2bi
|
|
swapd localize-lambda <lambda>
|
|
'[ , cut '[ @ , seq>list ] call , call ] ;
|
|
|
|
: normal-lambda ( body vars -- quot )
|
|
localize-lambda <lambda> lambda-rewrite [ compose call ] compose 1quotation ;
|
|
PRIVATE>
|
|
|
|
: convert-lambda ( cons -- quot )
|
|
split-lambda "&rest" over member? [ rest-lambda ] [ normal-lambda ] if ;
|
|
|
|
: convert-quoted ( cons -- quot )
|
|
cadr 1quotation ;
|
|
|
|
: convert-defmacro ( cons -- quot )
|
|
cdr [ car ] keep [ convert-lambda ] [ car name>> ] bi define-lisp-macro 1quotation ;
|
|
|
|
: form-dispatch ( cons lisp-symbol -- quot )
|
|
name>>
|
|
{ { "lambda" [ convert-lambda ] }
|
|
{ "defmacro" [ convert-defmacro ] }
|
|
{ "quote" [ convert-quoted ] }
|
|
{ "begin" [ convert-begin ] }
|
|
{ "cond" [ convert-cond ] }
|
|
[ drop convert-general-form ]
|
|
} case ;
|
|
|
|
: convert-list-form ( cons -- quot )
|
|
dup car
|
|
{ { [ dup lisp-macro? ] [ drop macro-expand ] }
|
|
{ [ dup lisp-symbol? ] [ form-dispatch ] }
|
|
[ drop convert-general-form ]
|
|
} cond ;
|
|
|
|
: convert-form ( lisp-form -- quot )
|
|
{
|
|
{ [ dup cons? ] [ convert-list-form ] }
|
|
{ [ dup lisp-var? ] [ lookup-var 1quotation ] }
|
|
{ [ dup lisp-symbol? ] [ '[ , lookup-var ] ] }
|
|
[ 1quotation ]
|
|
} cond ;
|
|
|
|
: compile-form ( lisp-ast -- quot )
|
|
convert-form lambda-rewrite call ; inline
|
|
|
|
: macro-expand ( cons -- quot )
|
|
uncons [ list>seq [ ] like ] [ lookup-macro lambda-rewrite call ] bi* call compile-form call ;
|
|
|
|
: lisp-string>factor ( str -- quot )
|
|
lisp-expr parse-result-ast compile-form ;
|
|
|
|
: lisp-eval ( str -- * )
|
|
lisp-string>factor call ;
|
|
|
|
! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
|
|
SYMBOL: lisp-env
|
|
SYMBOL: macro-env
|
|
|
|
: init-env ( -- )
|
|
H{ } clone lisp-env set
|
|
H{ } clone macro-env set ;
|
|
|
|
: lisp-define ( quot name -- )
|
|
lisp-env get set-at ;
|
|
|
|
: defun ( name quot -- name )
|
|
over name>> lisp-define ;
|
|
|
|
: lisp-get ( name -- word )
|
|
dup lisp-env get at [ ] [ no-such-var ] ?if ;
|
|
|
|
: lookup-var ( lisp-symbol -- quot )
|
|
name>> lisp-get ;
|
|
|
|
: lisp-var? ( lisp-symbol -- ? )
|
|
dup lisp-symbol? [ name>> lisp-env get key? ] [ drop f ] if ;
|
|
|
|
: funcall-arg-list ( args -- newargs )
|
|
[ ] [ dup \ funcall = [ drop 2 cut* [ funcall ] compose call ] when suffix ] reduce ;
|
|
|
|
: funcall ( quot sym -- * )
|
|
[ funcall-arg-list ] dip
|
|
dup lisp-symbol? [ lookup-var ] when curry call ; inline
|
|
|
|
: define-primitive ( name vocab word -- )
|
|
swap lookup 1quotation '[ , compose call ] swap lisp-define ; ! '[ , compose call ] swap lisp-define ;
|
|
|
|
: lookup-macro ( lisp-symbol -- lambda )
|
|
name>> macro-env get at ;
|
|
|
|
: define-lisp-macro ( quot name -- )
|
|
macro-env get set-at ;
|
|
|
|
: lisp-macro? ( car -- ? )
|
|
dup lisp-symbol? [ name>> macro-env get key? ] [ drop f ] if ;
|