202 lines
5.2 KiB
Factor
202 lines
5.2 KiB
Factor
! Copyright (C) 2005, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: arrays definitions generic assocs kernel math namespaces
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sequences strings vectors words words.symbol quotations io
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combinators sorting splitting math.parser effects continuations
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io.files vocabs io.encodings.utf8 source-files classes
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hashtables compiler.units accessors sets lexer vocabs.parser
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effects.parser slots parser.notes ;
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IN: parser
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: location ( -- loc )
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file get lexer get line>> 2dup and
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[ [ path>> ] dip 2array ] [ 2drop f ] if ;
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: save-location ( definition -- )
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location remember-definition ;
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M: parsing-word stack-effect drop (( parsed -- parsed )) ;
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: create-in ( str -- word )
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current-vocab create dup set-word dup save-location ;
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: CREATE ( -- word ) scan create-in ;
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: CREATE-WORD ( -- word ) CREATE dup reset-generic ;
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SYMBOL: auto-use?
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: no-word-restarted ( restart-value -- word )
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dup word? [
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dup vocabulary>>
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[ auto-use-vocab ]
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[ "Added \"" "\" vocabulary to search path" surround note. ] bi
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] [ create-in ] if ;
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: no-word ( name -- newword )
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dup words-named [ forward-reference? not ] filter
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dup length 1 = auto-use? get and
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[ nip first no-word-restarted ]
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[ <no-word-error> throw-restarts no-word-restarted ]
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if ;
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: parse-word ( string -- word/number )
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dup search [ ] [
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dup string>number [ ] [ no-word ] ?if
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] ?if ;
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: scan-word ( -- word/number/f )
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scan dup [ parse-word ] when ;
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ERROR: staging-violation word ;
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: execute-parsing ( accum word -- accum )
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dup changed-definitions get key? [ staging-violation ] when
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execute( accum -- accum ) ;
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: scan-object ( -- object )
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scan-word dup parsing-word?
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[ V{ } clone swap execute-parsing first ] when ;
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: parse-step ( accum end -- accum ? )
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scan-word {
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{ [ 2dup eq? ] [ 2drop f ] }
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{ [ dup not ] [ drop unexpected-eof t ] }
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{ [ dup delimiter? ] [ unexpected t ] }
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{ [ dup parsing-word? ] [ nip execute-parsing t ] }
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[ pick push drop t ]
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} cond ;
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: (parse-until) ( accum end -- accum )
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[ parse-step ] keep swap [ (parse-until) ] [ drop ] if ;
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: parse-until ( end -- vec )
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100 <vector> swap (parse-until) ;
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SYMBOL: quotation-parser
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HOOK: parse-quotation quotation-parser ( -- quot )
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M: f parse-quotation \ ] parse-until >quotation ;
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: parsed ( accum obj -- accum ) over push ;
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: (parse-lines) ( lexer -- quot )
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[ f parse-until >quotation ] with-lexer ;
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: parse-lines ( lines -- quot )
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lexer-factory get call( lines -- lexer ) (parse-lines) ;
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: parse-literal ( accum end quot -- accum )
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[ parse-until ] dip call parsed ; inline
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: parse-definition ( -- quot )
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\ ; parse-until >quotation ;
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: (:) ( -- word def effect )
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CREATE-WORD
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complete-effect
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parse-definition swap ;
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ERROR: bad-number ;
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: scan-base ( base -- n )
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scan swap base> [ bad-number ] unless* ;
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: parse-base ( parsed base -- parsed )
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scan-base parsed ;
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SYMBOL: bootstrap-syntax
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: with-file-vocabs ( quot -- )
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[
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<manifest> manifest set
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"syntax" use-vocab
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bootstrap-syntax get [ use-words ] when*
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call
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] with-scope ; inline
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SYMBOL: print-use-hook
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print-use-hook [ [ ] ] initialize
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: parse-fresh ( lines -- quot )
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[
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parse-lines
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auto-used? [ print-use-hook get call( -- ) ] when
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] with-file-vocabs ;
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: parsing-file ( file -- )
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"quiet" get [ drop ] [ "Loading " write print flush ] if ;
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: filter-moved ( assoc1 assoc2 -- seq )
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swap assoc-diff keys [
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{
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{ [ dup where dup [ first ] when file get path>> = not ] [ f ] }
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{ [ dup reader-method? ] [ f ] }
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{ [ dup writer-method? ] [ f ] }
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[ t ]
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} cond nip
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] filter ;
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: removed-definitions ( -- assoc1 assoc2 )
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new-definitions old-definitions
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[ get first2 assoc-union ] bi@ ;
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: removed-classes ( -- assoc1 assoc2 )
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new-definitions old-definitions
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[ get second ] bi@ ;
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: forget-removed-definitions ( -- )
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removed-definitions filter-moved forget-all ;
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: reset-removed-classes ( -- )
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removed-classes
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filter-moved [ class? ] filter [ forget-class ] each ;
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: fix-class-words ( -- )
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#! If a class word had a compound definition which was
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#! removed, it must go back to being a symbol.
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new-definitions get first2
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filter-moved [ [ reset-generic ] [ define-symbol ] bi ] each ;
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: forget-smudged ( -- )
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forget-removed-definitions
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reset-removed-classes
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fix-class-words ;
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: finish-parsing ( lines quot -- )
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file get
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[ record-top-level-form ]
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[ record-definitions ]
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[ record-checksum ]
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tri ;
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: parse-stream ( stream name -- quot )
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[
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[
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stream-lines dup parse-fresh
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[ nip ] [ finish-parsing ] 2bi
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forget-smudged
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] with-source-file
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] with-compilation-unit ;
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: parse-file-restarts ( file -- restarts )
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"Load " " again" surround t 2array 1array ;
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: parse-file ( file -- quot )
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[
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[ parsing-file ] keep
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[ utf8 <file-reader> ] keep
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parse-stream
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] [
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over parse-file-restarts rethrow-restarts
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drop parse-file
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] recover ;
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: run-file ( file -- )
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parse-file call( -- ) ;
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: ?run-file ( path -- )
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dup exists? [ run-file ] [ drop ] if ;
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