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@ -1,15 +1,20 @@
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USING: arrays combinators kernel lazy-lists math math.parser
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namespaces parser parser-combinators parser-combinators.simple
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promises quotations sequences combinators.lib strings macros
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assocs ;
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assocs prettyprint.backend ;
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IN: regexp
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: or-predicates ( quots -- quot )
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[ \ dup add* ] map [ [ t ] ] f short-circuit \ nip add ;
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: octal-digit? ( n -- ? ) CHAR: 0 CHAR: 7 between? ;
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MACRO: fast-member? ( str -- quot )
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[ dup ] H{ } map>assoc [ key? ] curry ;
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: decimal-digit? ( n -- ? ) CHAR: 0 CHAR: 9 between? ;
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: octal-digit? ( n -- ? )
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CHAR: 0 CHAR: 7 between? ;
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: decimal-digit? ( n -- ? )
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CHAR: 0 CHAR: 9 between? ;
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: hex-digit? ( n -- ? )
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dup decimal-digit?
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@ -19,9 +24,6 @@ IN: regexp
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dup 0 HEX: 1f between?
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swap HEX: 7f = or ;
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MACRO: fast-member? ( str -- quot )
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[ dup ] H{ } map>assoc [ key? ] curry ;
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: punct? ( n -- ? )
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"!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" fast-member? ;
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@ -54,13 +56,6 @@ MACRO: fast-member? ( str -- quot )
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"u" token 'hex-digit' 4 exactly-n &> <|>
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[ hex> ] <@ ;
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: 'control-character' ( -- parser )
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"c" token [ LETTER? ] satisfy &> ;
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: 'simple-escape' ( -- parser )
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'octal' 'hex' 'control-character' <|> <|>
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[ [ = ] curry ] <@ ;
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: satisfy-tokens ( assoc -- parser )
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[ >r token r> [ nip ] curry <@ ] { } assoc>map <or-parser> ;
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@ -102,21 +97,26 @@ MACRO: fast-member? ( str -- quot )
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{ "Space" [ java-blank? ] }
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} satisfy-tokens "p{" "}" surrounded-by ;
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: 'simple-escape' ( -- parser )
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'octal'
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'hex' <|>
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"c" token [ LETTER? ] satisfy &> <|>
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any-char-parser <|>
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[ [ = ] curry ] <@ ;
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: 'escape' ( -- parser )
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"\\" token
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'simple-escape'
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'simple-escape-char' <|>
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'simple-escape-char'
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'predefined-char-class' <|>
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'posix-character-class' <|> &> ;
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'posix-character-class' <|>
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'simple-escape' <|> &> ;
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: 'any-char' "." token [ drop [ drop t ] ] <@ ;
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: 'any-char'
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"." token [ drop [ drop t ] ] <@ ;
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: 'char'
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'any-char' 'escape' 'ordinary-char' <|> <|> [ satisfy ] <@ ;
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: 'string'
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'char' <+> [ <and-parser> ] <@ ;
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DEFER: 'regexp'
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TUPLE: group-result str ;
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@ -152,47 +152,75 @@ C: <group-result> group-result
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: 'escaped-seq' ( -- parser )
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any-char-parser <*> [ token ] <@ "\\Q" "\\E" surrounded-by ;
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: 'term' ( -- parser )
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: 'simple' ( -- parser )
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'escaped-seq'
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'grouping' <|>
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'string' <|>
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'character-class' <|>
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<+> [ <and-parser> ] <@ ;
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'char' <|>
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'character-class' <|> ;
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: 'interval' ( -- parser )
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'term' 'integer' "{" "}" surrounded-by <&> [ first2 exactly-n ] <@
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'term' 'integer' "{" ",}" surrounded-by <&> [ first2 at-least-n ] <@ <|>
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'term' 'integer' "{," "}" surrounded-by <&> [ first2 at-most-n ] <@ <|>
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'term' 'integer' "," token <& 'integer' <&> "{" "}" surrounded-by <&> [ first2 first2 from-m-to-n ] <@ <|> ;
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'simple' 'integer' "{" "}" surrounded-by <&> [ first2 exactly-n ] <@
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'simple' 'integer' "{" ",}" surrounded-by <&> [ first2 at-least-n ] <@ <|>
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'simple' 'integer' "{," "}" surrounded-by <&> [ first2 at-most-n ] <@ <|>
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'simple' 'integer' "," token <& 'integer' <&> "{" "}" surrounded-by <&> [ first2 first2 from-m-to-n ] <@ <|> ;
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: 'repetition' ( -- parser )
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'term' "*" token <& [ <*> ] <@
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'term' "+" token <& [ <+> ] <@ <|>
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'term' "?" token <& [ <?> ] <@ <|> ;
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'simple' "*" token <& [ <*> ] <@
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'simple' "+" token <& [ <+> ] <@ <|>
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'simple' "?" token <& [ <?> ] <@ <|> ;
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: 'simple' 'term' 'repetition' 'interval' <|> <|> ;
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LAZY: 'union' ( -- parser )
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'simple' "|" token nonempty-list-of [ <or-parser> ] <@ ;
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: 'term' ( -- parser )
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'simple' 'repetition' 'interval' <|> <|>
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<+> [ <and-parser> ] <@ ;
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LAZY: 'regexp' ( -- parser )
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'repetition' 'union' <|> ;
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'term' "|" token nonempty-list-of [ <or-parser> ] <@ ;
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: <regexp> 'regexp' just parse-1 ;
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TUPLE: regexp source parser ;
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: <regexp> dup 'regexp' just parse-1 regexp construct-boa ;
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GENERIC: >regexp ( obj -- parser )
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M: string >regexp 'regexp' just parse-1 ;
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M: string >regexp <regexp> ;
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M: object >regexp ;
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: matches? ( string regexp -- ? ) >regexp just parse nil? not ;
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: matches? ( string regexp -- ? )
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>regexp regexp-parser just parse nil? not ;
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! Literal syntax for regexps
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: parse-regexp ( accum end -- accum )
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lexer get dup skip-blank [
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[ index* dup 1+ swap ] 2keep swapd subseq swap
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] change-column <regexp> parsed ;
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: R/ CHAR: / parse-regexp ; parsing
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: R| CHAR: | parse-regexp ; parsing
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: R! CHAR: ! parse-regexp ; parsing
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: R" CHAR: " parse-regexp ; parsing
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: R# CHAR: # parse-regexp ; parsing
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: R' CHAR: ' parse-regexp ; parsing
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: R( CHAR: ) parse-regexp ; parsing
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: R/ CHAR: / parse-regexp ; parsing
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: R@ CHAR: @ parse-regexp ; parsing
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: R[ CHAR: ] parse-regexp ; parsing
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: R` CHAR: ` parse-regexp ; parsing
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: R{ CHAR: } parse-regexp ; parsing
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: R| CHAR: | parse-regexp ; parsing
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: find-regexp-syntax ( string -- prefix suffix )
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{
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{ "R/ " "/" }
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{ "R! " "!" }
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{ "R\" " "\"" }
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{ "R# " "#" }
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{ "R' " "'" }
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{ "R( " ")" }
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{ "R@ " "@" }
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{ "R[ " "]" }
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{ "R` " "`" }
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{ "R{ " "}" }
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{ "R| " "|" }
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} swap [ subseq? not nip ] curry assoc-find drop ;
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M: regexp pprint*
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dup regexp-source dup find-regexp-syntax pprint-string ;
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