: LETTER? ( ch -- ? ) CHAR: A CHAR: Z between? ; inline\r
: digit? ( ch -- ? ) CHAR: 0 CHAR: 9 between? ; inline\r
: printable? ( ch -- ? ) CHAR: \s CHAR: ~ between? ; inline\r
-: control? ( ch -- ? ) "\0\e\r\n\t\u000008\u00007f" member? ; inline\r
+: control? ( ch -- ? ) { [ 0 HEX: 1F between? ] [ HEX: 7F = ] } 1|| ; inline\r
: quotable? ( ch -- ? ) { [ printable? ] [ "\"\\" member? not ] } 1&& ; inline\r
: Letter? ( ch -- ? ) { [ letter? ] [ LETTER? ] } 1|| ; inline\r
: alpha? ( ch -- ? ) { [ Letter? ] [ digit? ] } 1|| ; inline\r
: >upper ( str -- upper ) [ ch>upper ] map ;\r
\r
HINTS: >lower string ;\r
-HINTS: >upper string ;
\ No newline at end of file
+HINTS: >upper string ;\r
[ f ] [ "foo.java" "*.{xml,txt}" glob-matches? ] unit-test
[ t ] [ "foo.txt" "*.{xml,txt}" glob-matches? ] unit-test
[ t ] [ "foo.xml" "*.{xml,txt}" glob-matches? ] unit-test
-[ f ] [ "foo." "*.{,xml,txt}" glob-matches? ] unit-test
+[ f ] [ "foo." "*.{xml,txt}" glob-matches? ] unit-test
+[ t ] [ "foo." "*.{,xml,txt}" glob-matches? ] unit-test
[ t ] [ "foo.{" "*.{" glob-matches? ] unit-test
-! Copyright (C) 2007 Slava Pestov.
+! Copyright (C) 2007, 2009 Slava Pestov, Daniel Ehrenberg.
! See http://factorcode.org/license.txt for BSD license.
-USING: parser-combinators parser-combinators.regexp lists sequences kernel
-promises strings unicode.case ;
+USING: sequences kernel regexp.combinators regexp.matchers strings unicode.case
+peg.ebnf regexp arrays ;
IN: globs
-<PRIVATE
+EBNF: <glob>
-: 'char' ( -- parser )
- [ ",*?" member? not ] satisfy ;
+Character = "\\" .:c => [[ c 1string <literal> ]]
+ | !(","|"}") . => [[ 1string <literal> ]]
-: 'string' ( -- parser )
- 'char' <+> [ >lower token ] <@ ;
+RangeCharacter = !("]") .
-: 'escaped-char' ( -- parser )
- "\\" token any-char-parser &> [ 1token ] <@ ;
+Range = RangeCharacter:a "-" RangeCharacter:b => [[ a b <char-range> ]]
+ | RangeCharacter => [[ 1string <literal> ]]
-: 'escaped-string' ( -- parser )
- 'string' 'escaped-char' <|> ;
+StartRange = .:a "-" RangeCharacter:b => [[ a b <char-range> ]]
+ | . => [[ 1string <literal> ]]
-DEFER: 'term'
+Ranges = StartRange:s Range*:r => [[ r s prefix ]]
-: 'glob' ( -- parser )
- 'term' <*> [ <and-parser> ] <@ ;
+CharClass = "^"?:n Ranges:e => [[ e <or> n [ <not> ] when ]]
-: 'union' ( -- parser )
- 'glob' "," token nonempty-list-of "{" "}" surrounded-by
- [ <or-parser> ] <@ ;
+AlternationBody = Concatenation:c "," AlternationBody:a => [[ a c prefix ]]
+ | Concatenation => [[ 1array ]]
-LAZY: 'term' ( -- parser )
- 'union'
- 'character-class' <|>
- "?" token [ drop any-char-parser ] <@ <|>
- "*" token [ drop any-char-parser <*> ] <@ <|>
- 'escaped-string' <|> ;
+Element = "*" => [[ R/ .*/ ]]
+ | "?" => [[ R/ ./ ]]
+ | "[" CharClass:c "]" => [[ c ]]
+ | "{" AlternationBody:b "}" => [[ b <or> ]]
+ | Character
-PRIVATE>
+Concatenation = Element* => [[ <sequence> ]]
-: <glob> ( string -- glob ) 'glob' just parse-1 just ;
+End = !(.)
+
+Main = Concatenation End
+
+;EBNF
: glob-matches? ( input glob -- ? )
- [ >lower ] [ <glob> ] bi* parse nil? not ;
+ [ >case-fold ] bi@ <glob> matches? ;
--- /dev/null
+! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
+! See http://factorcode.org/license.txt for BSD license.
+USING: kernel arrays accessors fry sequences regexp.classes ;
+FROM: math.ranges => [a,b] ;
+IN: regexp.ast
+
+TUPLE: negation term ;
+C: <negation> negation
+
+TUPLE: from-to n m ;
+C: <from-to> from-to
+
+TUPLE: at-least n ;
+C: <at-least> at-least
+
+TUPLE: tagged-epsilon tag ;
+C: <tagged-epsilon> tagged-epsilon
+
+CONSTANT: epsilon T{ tagged-epsilon { tag t } }
+
+TUPLE: concatenation first second ;
+
+: <concatenation> ( seq -- concatenation )
+ [ epsilon ] [ unclip [ concatenation boa ] reduce ] if-empty ;
+
+TUPLE: alternation first second ;
+
+: <alternation> ( seq -- alternation )
+ unclip [ alternation boa ] reduce ;
+
+TUPLE: star term ;
+C: <star> star
+
+TUPLE: with-options tree options ;
+C: <with-options> with-options
+
+TUPLE: options on off ;
+C: <options> options
+
+SINGLETONS: unix-lines dotall multiline comments case-insensitive
+unicode-case reversed-regexp ;
+
+: <maybe> ( term -- term' )
+ f <concatenation> 2array <alternation> ;
+
+: <plus> ( term -- term' )
+ dup <star> 2array <concatenation> ;
+
+: repetition ( n term -- term' )
+ <array> <concatenation> ;
+
+GENERIC: <times> ( term times -- term' )
+M: at-least <times>
+ n>> swap [ repetition ] [ <star> ] bi 2array <concatenation> ;
+M: from-to <times>
+ [ n>> ] [ m>> ] bi [a,b] swap '[ _ repetition ] map <alternation> ;
+
+: char-class ( ranges ? -- term )
+ [ <or-class> ] dip [ <not-class> ] when ;
+
+TUPLE: lookahead term ;
+C: <lookahead> lookahead
+
+TUPLE: lookbehind term ;
+C: <lookbehind> lookbehind
+
+TUPLE: possessive-star term ;
+C: <possessive-star> possessive-star
+
+: <possessive-plus> ( term -- term' )
+ dup <possessive-star> 2array <concatenation> ;
+
+++ /dev/null
-! Copyright (C) 2008 Doug Coleman.
-! See http://factorcode.org/license.txt for BSD license.
-USING: accessors hashtables kernel math vectors ;
-IN: regexp.backend
-
-TUPLE: regexp
- raw
- { options hashtable }
- stack
- parse-tree
- nfa-table
- dfa-table
- minimized-table
- matchers
- { nfa-traversal-flags hashtable }
- { dfa-traversal-flags hashtable }
- { state integer }
- { new-states vector }
- { visited-states hashtable } ;
-
-: reset-regexp ( regexp -- regexp )
- 0 >>state
- V{ } clone >>stack
- V{ } clone >>new-states
- H{ } clone >>visited-states ;
-
-SYMBOL: current-regexp
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg.
+! See http://factorcode.org/license.txt for BSD license.
+USING: regexp.classes tools.test arrays kernel ;
+IN: regexp.classes.tests
+
+! Class algebra
+
+[ f ] [ { 1 2 } <and-class> ] unit-test
+[ T{ or-class f { 2 1 } } ] [ { 1 2 } <or-class> ] unit-test
+[ 3 ] [ { 1 2 } <and-class> 3 2array <or-class> ] unit-test
+[ CHAR: A ] [ CHAR: A LETTER-class <primitive-class> 2array <and-class> ] unit-test
+[ CHAR: A ] [ LETTER-class <primitive-class> CHAR: A 2array <and-class> ] unit-test
+[ T{ primitive-class { class LETTER-class } } ] [ CHAR: A LETTER-class <primitive-class> 2array <or-class> ] unit-test
+[ T{ primitive-class { class LETTER-class } } ] [ LETTER-class <primitive-class> CHAR: A 2array <or-class> ] unit-test
+[ t ] [ { t 1 } <or-class> ] unit-test
+[ t ] [ { 1 t } <or-class> ] unit-test
+[ f ] [ { f 1 } <and-class> ] unit-test
+[ f ] [ { 1 f } <and-class> ] unit-test
+[ 1 ] [ { f 1 } <or-class> ] unit-test
+[ 1 ] [ { 1 f } <or-class> ] unit-test
+[ 1 ] [ { t 1 } <and-class> ] unit-test
+[ 1 ] [ { 1 t } <and-class> ] unit-test
+[ 1 ] [ 1 <not-class> <not-class> ] unit-test
+[ 1 ] [ { 1 1 } <and-class> ] unit-test
+[ 1 ] [ { 1 1 } <or-class> ] unit-test
+[ t ] [ { t t } <or-class> ] unit-test
+[ T{ primitive-class { class letter-class } } ] [ letter-class <primitive-class> dup 2array <and-class> ] unit-test
+[ T{ primitive-class { class letter-class } } ] [ letter-class <primitive-class> dup 2array <or-class> ] unit-test
+[ T{ or-class { seq { 2 3 1 } } } ] [ { 1 2 } <or-class> { 2 3 } <or-class> 2array <or-class> ] unit-test
+[ T{ or-class { seq { 3 2 } } } ] [ { 2 3 } <or-class> 1 <not-class> 2array <and-class> ] unit-test
+[ f ] [ t <not-class> ] unit-test
+[ t ] [ f <not-class> ] unit-test
+[ f ] [ 1 <not-class> 1 t replace-question ] unit-test
+
+! Making classes into nested conditionals
+
+[ V{ 1 2 3 4 } ] [ T{ and-class f { 1 T{ not-class f 2 } T{ or-class f { 3 4 } } 2 } } class>questions ] unit-test
+[ { 3 } ] [ { { 3 t } } table>condition ] unit-test
+[ { T{ primitive-class } } ] [ { { 1 t } { 2 T{ primitive-class } } } table>questions ] unit-test
+[ { { 1 t } { 2 t } } ] [ { { 1 t } { 2 T{ primitive-class } } } T{ primitive-class } t answer ] unit-test
+[ { { 1 t } } ] [ { { 1 t } { 2 T{ primitive-class } } } T{ primitive-class } f answer ] unit-test
+[ T{ condition f T{ primitive-class } { 1 2 } { 1 } } ] [ { { 1 t } { 2 T{ primitive-class } } } table>condition ] unit-test
+
+SYMBOL: foo
+SYMBOL: bar
+
+[ T{ condition f T{ primitive-class f bar } T{ condition f T{ primitive-class f foo } { 1 3 2 } { 1 3 } } T{ condition f T{ primitive-class f foo } { 1 2 } { 1 } } } ] [ { { 1 t } { 3 T{ primitive-class f bar } } { 2 T{ primitive-class f foo } } } table>condition ] unit-test
+
+[ t ] [ foo <primitive-class> dup t replace-question ] unit-test
+[ f ] [ foo <primitive-class> dup f replace-question ] unit-test
+[ T{ primitive-class f foo } ] [ foo <primitive-class> bar <primitive-class> t replace-question ] unit-test
+[ T{ primitive-class f foo } ] [ foo <primitive-class> bar <primitive-class> f replace-question ] unit-test
+[ T{ primitive-class f foo } ] [ foo <primitive-class> bar <primitive-class> 2array <and-class> bar <primitive-class> t replace-question ] unit-test
+[ T{ primitive-class f bar } ] [ foo <primitive-class> bar <primitive-class> 2array <and-class> foo <primitive-class> t replace-question ] unit-test
+[ f ] [ foo <primitive-class> bar <primitive-class> 2array <and-class> foo <primitive-class> f replace-question ] unit-test
+[ f ] [ foo <primitive-class> bar <primitive-class> 2array <and-class> bar <primitive-class> f replace-question ] unit-test
+[ t ] [ foo <primitive-class> bar <primitive-class> 2array <or-class> bar <primitive-class> t replace-question ] unit-test
+[ T{ primitive-class f foo } ] [ foo <primitive-class> bar <primitive-class> 2array <or-class> bar <primitive-class> f replace-question ] unit-test
-! Copyright (C) 2008 Doug Coleman.
+! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
! See http://factorcode.org/license.txt for BSD license.
-USING: accessors kernel math math.order words regexp.utils
-unicode.categories combinators.short-circuit ;
+USING: accessors kernel math math.order words combinators locals
+ascii unicode.categories combinators.short-circuit sequences
+fry macros arrays assocs sets classes ;
IN: regexp.classes
SINGLETONS: any-char any-char-no-nl
control-character-class hex-digit-class java-blank-class c-identifier-class
unmatchable-class terminator-class word-boundary-class ;
-SINGLETONS: beginning-of-input beginning-of-line
-end-of-input end-of-line ;
+SINGLETONS: beginning-of-input ^ end-of-input $ end-of-file ;
-MIXIN: node
-TUPLE: character-class-range from to ; INSTANCE: character-class-range node
+TUPLE: range from to ;
+C: <range> range
GENERIC: class-member? ( obj class -- ? )
-M: t class-member? ( obj class -- ? ) 2drop f ;
+M: t class-member? ( obj class -- ? ) 2drop t ;
-M: integer class-member? ( obj class -- ? ) 2drop f ;
+M: integer class-member? ( obj class -- ? ) = ;
-M: character-class-range class-member? ( obj class -- ? )
+M: range class-member? ( obj class -- ? )
[ from>> ] [ to>> ] bi between? ;
M: any-char class-member? ( obj class -- ? )
M: digit-class class-member? ( obj class -- ? )
drop digit? ;
+: c-identifier-char? ( ch -- ? )
+ { [ alpha? ] [ CHAR: _ = ] } 1|| ;
+
M: c-identifier-class class-member? ( obj class -- ? )
- drop
- { [ digit? ] [ Letter? ] [ CHAR: _ = ] } 1|| ;
+ drop c-identifier-char? ;
M: alpha-class class-member? ( obj class -- ? )
drop alpha? ;
+: punct? ( ch -- ? )
+ "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" member? ;
+
M: punctuation-class class-member? ( obj class -- ? )
drop punct? ;
+: java-printable? ( ch -- ? )
+ { [ alpha? ] [ punct? ] } 1|| ;
+
M: java-printable-class class-member? ( obj class -- ? )
drop java-printable? ;
drop { [ blank? ] [ CHAR: \n = not ] } 1&& ;
M: control-character-class class-member? ( obj class -- ? )
- drop control-char? ;
+ drop control? ;
+
+: hex-digit? ( ch -- ? )
+ {
+ [ CHAR: A CHAR: F between? ]
+ [ CHAR: a CHAR: f between? ]
+ [ CHAR: 0 CHAR: 9 between? ]
+ } 1|| ;
M: hex-digit-class class-member? ( obj class -- ? )
drop hex-digit? ;
+: java-blank? ( ch -- ? )
+ {
+ CHAR: \s CHAR: \t CHAR: \n
+ HEX: b HEX: 7 CHAR: \r
+ } member? ;
+
M: java-blank-class class-member? ( obj class -- ? )
drop java-blank? ;
2drop f ;
M: terminator-class class-member? ( obj class -- ? )
- drop {
- [ CHAR: \r = ]
- [ CHAR: \n = ]
- [ CHAR: \u000085 = ]
- [ CHAR: \u002028 = ]
- [ CHAR: \u002029 = ]
- } 1|| ;
+ drop "\r\n\u000085\u002029\u002028" member? ;
-M: beginning-of-line class-member? ( obj class -- ? )
+M: ^ class-member? ( obj class -- ? )
2drop f ;
-M: end-of-line class-member? ( obj class -- ? )
+M: $ class-member? ( obj class -- ? )
2drop f ;
+
+M: f class-member? 2drop f ;
+
+TUPLE: primitive-class class ;
+C: <primitive-class> primitive-class
+
+TUPLE: or-class seq ;
+
+TUPLE: not-class class ;
+
+TUPLE: and-class seq ;
+
+GENERIC: combine-and ( class1 class2 -- combined ? )
+
+: replace-if-= ( object object -- object ? )
+ over = ;
+
+M: object combine-and replace-if-= ;
+
+M: t combine-and
+ drop t ;
+
+M: f combine-and
+ nip t ;
+
+M: not-class combine-and
+ class>> 2dup = [ 2drop f t ] [
+ dup integer? [
+ 2dup swap class-member?
+ [ 2drop f f ]
+ [ drop t ] if
+ ] [ 2drop f f ] if
+ ] if ;
+
+M: integer combine-and
+ swap 2dup class-member? [ drop t ] [ 2drop f t ] if ;
+
+GENERIC: combine-or ( class1 class2 -- combined ? )
+
+M: object combine-or replace-if-= ;
+
+M: t combine-or
+ nip t ;
+
+M: f combine-or
+ drop t ;
+
+M: not-class combine-or
+ class>> = [ t t ] [ f f ] if ;
+
+M: integer combine-or
+ 2dup swap class-member? [ drop t ] [ 2drop f f ] if ;
+
+: flatten ( seq class -- newseq )
+ '[ dup _ instance? [ seq>> ] [ 1array ] if ] map concat ; inline
+
+: try-combine ( elt1 elt2 quot -- combined/f ? )
+ 3dup call [ [ 3drop ] dip t ] [ drop swapd call ] if ; inline
+
+:: prefix-combining ( seq elt quot: ( elt1 elt2 -- combined/f ? ) -- newseq )
+ f :> combined!
+ seq [ elt quot try-combine swap combined! ] find drop
+ [ seq remove-nth combined prefix ]
+ [ seq elt prefix ] if* ; inline
+
+:: combine ( seq quot: ( elt1 elt2 -- combined/f ? ) empty class -- newseq )
+ seq class flatten
+ { } [ quot prefix-combining ] reduce
+ dup length {
+ { 0 [ drop empty ] }
+ { 1 [ first ] }
+ [ drop class new swap >>seq ]
+ } case ; inline
+
+: <and-class> ( seq -- class )
+ [ combine-and ] t and-class combine ;
+
+M: and-class class-member?
+ seq>> [ class-member? ] with all? ;
+
+: <or-class> ( seq -- class )
+ [ combine-or ] f or-class combine ;
+
+M: or-class class-member?
+ seq>> [ class-member? ] with any? ;
+
+GENERIC: <not-class> ( class -- inverse )
+
+M: object <not-class>
+ not-class boa ;
+
+M: not-class <not-class>
+ class>> ;
+
+M: and-class <not-class>
+ seq>> [ <not-class> ] map <or-class> ;
+
+M: or-class <not-class>
+ seq>> [ <not-class> ] map <and-class> ;
+
+M: t <not-class> drop f ;
+M: f <not-class> drop t ;
+
+M: not-class class-member?
+ class>> class-member? not ;
+
+M: primitive-class class-member?
+ class>> class-member? ;
+
+UNION: class primitive-class not-class or-class and-class range ;
+
+TUPLE: condition question yes no ;
+C: <condition> condition
+
+GENERIC# replace-question 2 ( class from to -- new-class )
+
+M:: object replace-question ( class from to -- new-class )
+ class from = to class ? ;
+
+: replace-compound ( class from to -- seq )
+ [ seq>> ] 2dip '[ _ _ replace-question ] map ;
+
+M: and-class replace-question
+ replace-compound <and-class> ;
+
+M: or-class replace-question
+ replace-compound <or-class> ;
+
+M: not-class replace-question
+ [ class>> ] 2dip replace-question <not-class> ;
+
+: answer ( table question answer -- new-table )
+ '[ _ _ replace-question ] assoc-map
+ [ nip ] assoc-filter ;
+
+DEFER: make-condition
+
+: (make-condition) ( table questions question -- condition )
+ [ 2nip ]
+ [ swap [ t answer ] dip make-condition ]
+ [ swap [ f answer ] dip make-condition ] 3tri
+ 2dup = [ 2nip ] [ <condition> ] if ;
+
+: make-condition ( table questions -- condition )
+ [ keys ] [ unclip (make-condition) ] if-empty ;
+
+GENERIC: class>questions ( class -- questions )
+: compound-questions ( class -- questions ) seq>> [ class>questions ] gather ;
+M: or-class class>questions compound-questions ;
+M: and-class class>questions compound-questions ;
+M: not-class class>questions class>> class>questions ;
+M: object class>questions 1array ;
+
+: table>questions ( table -- questions )
+ values [ class>questions ] gather >array t swap remove ;
+
+: table>condition ( table -- condition )
+ ! input table is state => class
+ >alist dup table>questions make-condition ;
+
+: condition-map ( condition quot: ( obj -- obj' ) -- new-condition )
+ over condition? [
+ [ [ question>> ] [ yes>> ] [ no>> ] tri ] dip
+ '[ _ condition-map ] bi@ <condition>
+ ] [ call ] if ; inline recursive
+
+: condition-states ( condition -- states )
+ dup condition? [
+ [ yes>> ] [ no>> ] bi
+ [ condition-states ] bi@ append prune
+ ] [ 1array ] if ;
+
+: condition-at ( condition assoc -- new-condition )
+ '[ _ at ] condition-map ;
--- /dev/null
+Daniel Ehrenberg
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg
+! See http://factorcode.org/license.txt for BSD license.
+USING: help.syntax help.markup regexp strings ;
+IN: regexp.combinators
+
+ABOUT: "regexp.combinators"
+
+ARTICLE: "regexp.combinators" "Regular expression combinators"
+"The " { $vocab-link "regexp.combinators" } " vocabulary defines combinators which can be used to build up regular expressions to match strings. This is in addition to the traditional syntax defined in the " { $vocab-link "regexp" } " vocabulary."
+{ $subsection <literal> }
+{ $subsection <nothing> }
+{ $subsection <or> }
+{ $subsection <and> }
+{ $subsection <not> }
+{ $subsection <sequence> }
+{ $subsection <zero-or-more> }
+{ $subsection <one-or-more> }
+{ $subsection <option> } ;
+
+HELP: <literal>
+{ $values { "string" string } { "regexp" regexp } }
+{ $description "Creates a regular expression which matches the given literal string." } ;
+
+HELP: <nothing>
+{ $values { "value" regexp } }
+{ $description "The empty regular language." } ;
+
+HELP: <or>
+{ $values { "regexps" "a sequence of regular expressions" } { "disjunction" regexp } }
+{ $description "Creates a new regular expression which matches the union of what elements of the sequence match." } ;
+
+HELP: <and>
+{ $values { "regexps" "a sequence of regular expressions" } { "conjunction" regexp } }
+{ $description "Creates a new regular expression which matches the intersection of what elements of the sequence match." } ;
+
+HELP: <sequence>
+{ $values { "regexps" "a sequence of regular expressions" } { "regexp" regexp } }
+{ $description "Creates a new regular expression which matches strings that match each element of the sequence in order." } ;
+
+HELP: <not>
+{ $values { "regexp" regexp } { "not-regexp" regexp } }
+{ $description "Creates a new regular expression which matches everything that the given regexp does not match." } ;
+
+HELP: <one-or-more>
+{ $values { "regexp" regexp } { "regexp+" regexp } }
+{ $description "Creates a new regular expression which matches one or more copies of the given regexp." } ;
+
+HELP: <option>
+{ $values { "regexp" regexp } { "regexp?" regexp } }
+{ $description "Creates a new regular expression which matches zero or one copies of the given regexp." } ;
+
+HELP: <zero-or-more>
+{ $values { "regexp" regexp } { "regexp*" regexp } }
+{ $description "Creates a new regular expression which matches zero or more copies of the given regexp." } ;
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg
+! See http://factorcode.org/license.txt for BSD license.
+USING: regexp.combinators tools.test regexp kernel sequences regexp.matchers ;
+IN: regexp.combinators.tests
+
+: strings ( -- regexp )
+ { "foo" "bar" "baz" } <any-of> ;
+
+[ t t t ] [ "foo" "bar" "baz" [ strings matches? ] tri@ ] unit-test
+[ f f f ] [ "food" "ibar" "ba" [ strings matches? ] tri@ ] unit-test
+
+: conj ( -- regexp )
+ { R/ .*a/ R/ b.*/ } <and> ;
+
+[ t ] [ "bljhasflsda" conj matches? ] unit-test
+[ f ] [ "bsdfdfs" conj matches? ] unit-test ! why does this fail?
+[ f ] [ "fsfa" conj matches? ] unit-test
+
+! For some reason, creating this DFA doesn't work
+! [ f ] [ "bljhasflsda" conj <not> matches? ] unit-test
+! [ t ] [ "bsdfdfs" conj <not> matches? ] unit-test
+! [ t ] [ "fsfa" conj <not> matches? ] unit-test
+
+[ f f ] [ "" "hi" [ <nothing> matches? ] bi@ ] unit-test
+[ t t ] [ "" "hi" [ <nothing> <not> matches? ] bi@ ] unit-test
+
+[ { t t t f } ] [ { "" "a" "aaaaa" "aab" } [ "a" <literal> <zero-or-more> matches? ] map ] unit-test
+[ { f t t f } ] [ { "" "a" "aaaaa" "aab" } [ "a" <literal> <one-or-more> matches? ] map ] unit-test
+[ { t t f f } ] [ { "" "a" "aaaaa" "aab" } [ "a" <literal> <option> matches? ] map ] unit-test
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg
+! See http://factorcode.org/license.txt for BSD license.
+USING: regexp sequences kernel regexp.negation regexp.ast
+accessors fry regexp.classes ;
+IN: regexp.combinators
+
+<PRIVATE
+
+: modify-regexp ( regexp raw-quot tree-quot -- new-regexp )
+ [ '[ raw>> @ ] ]
+ [ '[ parse-tree>> @ ] ] bi* bi
+ make-regexp ; inline
+
+PRIVATE>
+
+CONSTANT: <nothing> R/ (?~.*)/
+
+: <literal> ( string -- regexp )
+ [ "\\Q" "\\E" surround ] [ <concatenation> ] bi make-regexp ; foldable
+
+: <char-range> ( char1 char2 -- regexp )
+ [ [ "[" "-" surround ] [ "]" append ] bi* append ]
+ [ <range> ]
+ 2bi make-regexp ;
+
+: <or> ( regexps -- disjunction )
+ [ [ raw>> "(" ")" surround ] map "|" join ]
+ [ [ parse-tree>> ] map <alternation> ] bi
+ make-regexp ; foldable
+
+: <any-of> ( strings -- regexp )
+ [ <literal> ] map <or> ; foldable
+
+: <sequence> ( regexps -- regexp )
+ [ [ raw>> ] map concat ]
+ [ [ parse-tree>> ] map <concatenation> ] bi
+ make-regexp ; foldable
+
+: <not> ( regexp -- not-regexp )
+ [ "(?~" ")" surround ]
+ [ <negation> ] modify-regexp ; foldable
+
+: <and> ( regexps -- conjunction )
+ [ <not> ] map <or> <not> ; foldable
+
+: <zero-or-more> ( regexp -- regexp* )
+ [ "(" ")*" surround ]
+ [ <star> ] modify-regexp ; foldable
+
+: <one-or-more> ( regexp -- regexp+ )
+ [ "(" ")+" surround ]
+ [ <plus> ] modify-regexp ; foldable
+
+: <option> ( regexp -- regexp? )
+ [ "(" ")?" surround ]
+ [ <maybe> ] modify-regexp ; foldable
--- /dev/null
+Combinators for creating regular expressions
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg.
+! See http://factorcode.org/license.txt for BSD license.
+USING: regexp.classes kernel sequences regexp.negation
+quotations regexp.minimize assocs fry math locals combinators
+accessors words compiler.units kernel.private strings
+sequences.private arrays regexp.matchers call namespaces
+regexp.transition-tables combinators.short-circuit ;
+IN: regexp.compiler
+
+GENERIC: question>quot ( question -- quot )
+
+<PRIVATE
+
+SYMBOL: shortest?
+SYMBOL: backwards?
+
+M: t question>quot drop [ 2drop t ] ;
+
+M: beginning-of-input question>quot
+ drop [ drop zero? ] ;
+
+M: end-of-input question>quot
+ drop [ length = ] ;
+
+M: end-of-file question>quot
+ drop [
+ {
+ [ length swap - 2 <= ]
+ [ swap tail { "\n" "\r\n" "\r" "" } member? ]
+ } 2&&
+ [ [ nip [ length ] keep ] when ] keep
+ ] ;
+
+M: $ question>quot
+ drop [ { [ length = ] [ ?nth "\r\n" member? ] } 2|| ] ;
+
+M: ^ question>quot
+ drop [ { [ drop zero? ] [ [ 1- ] dip ?nth "\r\n" member? ] } 2|| ] ;
+
+! Maybe the condition>quot things can be combined, given a suitable method
+! for question>quot on classes, but maybe that'd make stack shuffling annoying
+
+: execution-quot ( next-state -- quot )
+ ! The conditions here are for lookaround and anchors, etc
+ dup condition? [
+ [ question>> question>quot ] [ yes>> ] [ no>> ] tri
+ [ execution-quot ] bi@
+ '[ 2dup @ _ _ if ]
+ ] [
+ ! There shouldn't be a condition like this!
+ dup sequence?
+ [ [ [ 2drop ] ] [ first '[ _ execute ] ] if-empty ]
+ [ '[ _ execute ] ] if
+ ] if ;
+
+TUPLE: box contents ;
+C: <box> box
+
+: condition>quot ( condition -- quot )
+ ! Conditions here are for different classes
+ dup condition? [
+ [ question>> ] [ yes>> ] [ no>> ] tri
+ [ condition>quot ] bi@
+ '[ dup _ class-member? _ _ if ]
+ ] [
+ contents>>
+ [ [ 3drop ] ] [ execution-quot '[ drop @ ] ] if-empty
+ ] if ;
+
+: non-literals>dispatch ( non-literal-transitions -- quot )
+ [ swap ] assoc-map ! we want state => predicate, and get the opposite as input
+ table>condition [ <box> ] condition-map condition>quot ;
+
+: literals>cases ( literal-transitions -- case-body )
+ [ execution-quot ] assoc-map ;
+
+: expand-one-or ( or-class transition -- alist )
+ [ seq>> ] dip '[ _ 2array ] map ;
+
+: expand-or ( alist -- new-alist )
+ [
+ first2 over or-class?
+ [ expand-one-or ] [ 2array 1array ] if
+ ] map concat ;
+
+: split-literals ( transitions -- case default )
+ >alist expand-or [ first integer? ] partition
+ [ literals>cases ] [ non-literals>dispatch ] bi* ;
+
+:: step ( last-match index str quot final? direction -- last-index/f )
+ final? index last-match ?
+ index str bounds-check? [
+ index direction + str
+ index str nth-unsafe
+ quot call
+ ] when ; inline
+
+: direction ( -- n )
+ backwards? get -1 1 ? ;
+
+: transitions>quot ( transitions final-state? -- quot )
+ dup shortest? get and [ 2drop [ drop nip ] ] [
+ [ split-literals swap case>quot ] dip direction
+ '[ { array-capacity string } declare _ _ _ step ]
+ ] if ;
+
+: word>quot ( word dfa -- quot )
+ [ transitions>> at ]
+ [ final-states>> key? ] 2bi
+ transitions>quot ;
+
+: states>code ( words dfa -- )
+ '[
+ [
+ dup _ word>quot
+ (( last-match index string -- ? ))
+ define-declared
+ ] each
+ ] with-compilation-unit ;
+
+: states>words ( dfa -- words dfa )
+ dup transitions>> keys [ gensym ] H{ } map>assoc
+ [ transitions-at ]
+ [ values ]
+ bi swap ;
+
+: dfa>word ( dfa -- word )
+ states>words [ states>code ] keep start-state>> ;
+
+: check-string ( string -- string )
+ ! Make this configurable
+ dup string? [ "String required" throw ] unless ;
+
+: setup-regexp ( start-index string -- f start-index string )
+ [ f ] [ >fixnum ] [ check-string ] tri* ; inline
+
+PRIVATE>
+
+! The quotation returned is ( start-index string -- i/f )
+
+: dfa>quotation ( dfa -- quot )
+ dfa>word execution-quot '[ setup-regexp @ ] ;
+
+: dfa>shortest-quotation ( dfa -- quot )
+ t shortest? [ dfa>quotation ] with-variable ;
+
+: dfa>reverse-quotation ( dfa -- quot )
+ t backwards? [ dfa>quotation ] with-variable ;
+
+: dfa>reverse-shortest-quotation ( dfa -- quot )
+ t backwards? [ dfa>shortest-quotation ] with-variable ;
+
+TUPLE: quot-matcher quot ;
+C: <quot-matcher> quot-matcher
+
+M: quot-matcher match-index-from
+ quot>> call( index string -- i/f ) ;
--- /dev/null
+USING: regexp.dfa tools.test ;
+IN: regexp.dfa.tests
+
-! Copyright (C) 2008 Doug Coleman.
+! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors arrays assocs combinators fry kernel locals
math math.order regexp.nfa regexp.transition-tables sequences
-sets sorting vectors regexp.utils sequences.deep ;
-USING: io prettyprint threads ;
+sets sorting vectors regexp.ast regexp.classes ;
IN: regexp.dfa
-: find-delta ( states transition regexp -- new-states )
- nfa-table>> transitions>>
- rot [ swap at at ] with with gather sift ;
+: find-delta ( states transition nfa -- new-states )
+ transitions>> '[ _ swap _ at at ] gather sift ;
-: (find-epsilon-closure) ( states regexp -- new-states )
- eps swap find-delta ;
+:: epsilon-loop ( state table nfa question -- )
+ state table at :> old-value
+ old-value question 2array <or-class> :> new-question
+ new-question old-value = [
+ new-question state table set-at
+ state nfa transitions>> at
+ [ drop tagged-epsilon? ] assoc-filter
+ [| trans to |
+ to [
+ table nfa
+ trans tag>> new-question 2array <and-class>
+ epsilon-loop
+ ] each
+ ] assoc-each
+ ] unless ;
-: find-epsilon-closure ( states regexp -- new-states )
- '[ dup _ (find-epsilon-closure) union ] [ length ] while-changes
- natural-sort ;
+: epsilon-table ( states nfa -- table )
+ [ H{ } clone tuck ] dip
+ '[ _ _ t epsilon-loop ] each ;
-: find-closure ( states transition regexp -- new-states )
- [ find-delta ] 2keep nip find-epsilon-closure ;
+: find-epsilon-closure ( states nfa -- dfa-state )
+ epsilon-table table>condition ;
-: find-start-state ( regexp -- state )
- [ nfa-table>> start-state>> 1vector ] keep find-epsilon-closure ;
+: find-closure ( states transition nfa -- new-states )
+ [ find-delta ] keep find-epsilon-closure ;
-: find-transitions ( seq1 regexp -- seq2 )
- nfa-table>> transitions>>
- [ at keys ] curry gather
- eps swap remove ;
+: find-start-state ( nfa -- state )
+ [ start-state>> 1array ] keep find-epsilon-closure ;
-: add-todo-state ( state regexp -- )
- 2dup visited-states>> key? [
- 2drop
- ] [
- [ visited-states>> conjoin ]
- [ new-states>> push ] 2bi
- ] if ;
-
-: new-transitions ( regexp -- )
- dup new-states>> [
- drop
- ] [
- dupd pop dup pick find-transitions rot
- [
- [ [ find-closure ] 2keep nip dupd add-todo-state ] 3keep
- [ swapd transition make-transition ] dip
- dfa-table>> add-transition
- ] curry with each
- new-transitions
- ] if-empty ;
+: find-transitions ( dfa-state nfa -- next-dfa-state )
+ transitions>>
+ '[ _ at keys [ condition-states ] map concat ] gather
+ [ tagged-epsilon? not ] filter ;
-: states ( hashtable -- array )
- [ keys ]
- [ values [ values concat ] map concat append ] bi ;
+: add-todo-state ( state visited-states new-states -- )
+ 3dup drop key? [ 3drop ] [
+ [ conjoin ] [ push ] bi-curry* bi
+ ] if ;
-: set-final-states ( regexp -- )
- dup
- [ nfa-table>> final-states>> keys ]
- [ dfa-table>> transitions>> states ] bi
- [ intersects? ] with filter
+: add-todo-states ( state/condition visited-states new-states -- )
+ [ condition-states ] 2dip
+ '[ _ _ add-todo-state ] each ;
- swap dfa-table>> final-states>>
- [ conjoin ] curry each ;
+:: new-transitions ( nfa dfa new-states visited-states -- nfa dfa )
+ new-states [ nfa dfa ] [
+ pop :> state
+ state dfa transitions>> maybe-initialize-key
+ state nfa find-transitions
+ [| trans |
+ state trans nfa find-closure :> new-state
+ new-state visited-states new-states add-todo-states
+ state new-state trans dfa set-transition
+ ] each
+ nfa dfa new-states visited-states new-transitions
+ ] if-empty ;
-: set-initial-state ( regexp -- )
- dup
- [ dfa-table>> ] [ find-start-state ] bi
- [ >>start-state drop ] keep
- 1vector >>new-states drop ;
+: set-final-states ( nfa dfa -- )
+ [
+ [ final-states>> keys ]
+ [ transitions>> keys ] bi*
+ [ intersects? ] with filter
+ unique
+ ] keep (>>final-states) ;
-: set-traversal-flags ( regexp -- )
- dup
- [ nfa-traversal-flags>> ]
- [ dfa-table>> transitions>> keys ] bi
- [ [ nip ] [ [ swap at ] with map concat ] 2bi ] with H{ } map>assoc
- >>dfa-traversal-flags drop ;
+: initialize-dfa ( nfa -- dfa )
+ <transition-table>
+ swap find-start-state >>start-state ;
-: construct-dfa ( regexp -- )
- {
- [ set-initial-state ]
- [ new-transitions ]
- [ set-final-states ]
- [ set-traversal-flags ]
- } cleave ;
+: construct-dfa ( nfa -- dfa )
+ dup initialize-dfa
+ dup start-state>> condition-states >vector
+ H{ } clone
+ new-transitions
+ [ set-final-states ] keep ;
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg.
+! See http://factorcode.org/license.txt for BSD license.
+USING: kernel accessors regexp.classes math.bits assocs sequences
+arrays sets regexp.dfa math fry regexp.minimize regexp.ast ;
+IN: regexp.disambiguate
+
+TUPLE: parts in out ;
+
+: make-partition ( choices classes -- partition )
+ zip [ first ] partition [ values ] bi@ parts boa ;
+
+: powerset-partition ( classes -- partitions )
+ [ length [ 2^ ] keep ] keep '[
+ _ <bits> _ make-partition
+ ] map rest ;
+
+: partition>class ( parts -- class )
+ [ out>> [ <not-class> ] map ]
+ [ in>> <and-class> ] bi
+ prefix <and-class> ;
+
+: get-transitions ( partition state-transitions -- next-states )
+ [ in>> ] dip '[ _ at ] gather sift ;
+
+: new-transitions ( transitions -- assoc ) ! assoc is class, partition
+ values [ keys ] gather
+ [ tagged-epsilon? not ] filter
+ powerset-partition
+ [ [ partition>class ] keep ] { } map>assoc
+ [ drop ] assoc-filter ;
+
+: preserving-epsilon ( state-transitions quot -- new-state-transitions )
+ [ [ drop tagged-epsilon? ] assoc-filter ] bi
+ assoc-union H{ } assoc-like ; inline
+
+: disambiguate ( nfa -- nfa )
+ [
+ dup new-transitions '[
+ [
+ _ swap '[ _ get-transitions ] assoc-map
+ [ nip empty? not ] assoc-filter
+ ] preserving-epsilon
+ ] assoc-map
+ ] change-transitions ;
--- /dev/null
+! Copyright (C) 2008, 2009 Daniel Ehrenberg, Doug Coleman.
+! See http://factorcode.org/license.txt for BSD license.
+USING: kernel sequences math splitting make fry locals math.ranges
+accessors arrays ;
+IN: regexp.matchers
+
+! For now, a matcher is just something with a method to do the
+! equivalent of match.
+
+GENERIC: match-index-from ( i string matcher -- index/f )
+
+: match-index-head ( string matcher -- index/f )
+ [ 0 ] 2dip match-index-from ;
+
+: match-slice ( i string matcher -- slice/f )
+ [ 2dup ] dip match-index-from
+ [ swap <slice> ] [ 2drop f ] if* ;
+
+: matches? ( string matcher -- ? )
+ dupd match-index-head
+ [ swap length = ] [ drop f ] if* ;
+
+:: match-from ( i string matcher -- slice/f )
+ i string length [a,b)
+ [ string matcher match-slice ] map-find drop ;
+
+: match-head ( str matcher -- slice/f )
+ [ 0 ] 2dip match-from ;
+
+<PRIVATE
+
+: next-match ( i string matcher -- i match/f )
+ match-from [ dup [ to>> ] when ] keep ;
+
+PRIVATE>
+
+:: all-matches ( string matcher -- seq )
+ 0 [ dup ] [ string matcher next-match ] produce nip but-last ;
+
+: count-matches ( string matcher -- n )
+ all-matches length ;
+
+<PRIVATE
+
+:: split-slices ( string slices -- new-slices )
+ slices [ to>> ] map 0 prefix
+ slices [ from>> ] map string length suffix
+ [ string <slice> ] 2map ;
+
+PRIVATE>
+
+: re-split1 ( string matcher -- before after/f )
+ dupd match-head [ 1array split-slices first2 ] [ f ] if* ;
+
+: re-split ( string matcher -- seq )
+ dupd all-matches split-slices ;
+
+: re-replace ( string matcher replacement -- result )
+ [ re-split ] dip join ;
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg
+! See http://factorcode.org/license.txt for BSD license.
+USING: tools.test regexp.minimize assocs regexp
+accessors regexp.transition-tables regexp.parser regexp.negation ;
+IN: regexp.minimize.tests
+
+[ t ] [ 1 2 H{ { { 1 2 } t } } same-partition? ] unit-test
+[ t ] [ 2 1 H{ { { 1 2 } t } } same-partition? ] unit-test
+[ f ] [ 2 3 H{ { { 1 2 } t } } same-partition? ] unit-test
+
+[ H{ { 1 1 } { 2 1 } { 3 3 } { 4 3 } } ]
+[ { { 1 1 } { 1 2 } { 2 2 } { 3 3 } { 3 4 } { 4 4 } } [ t ] H{ } map>assoc partition>classes ] unit-test
+
+[ { { 1 2 } { 3 4 } } ] [ H{ { "elephant" 1 } { "tiger" 3 } } H{ { "elephant" 2 } { "tiger" 4 } } assemble-values ] unit-test
+
+: regexp-states ( string -- n )
+ parse-regexp ast>dfa transitions>> assoc-size ;
+
+[ 3 ] [ "ab|ac" regexp-states ] unit-test
+[ 3 ] [ "a(b|c)" regexp-states ] unit-test
+[ 1 ] [ "((aa*)*)*" regexp-states ] unit-test
+[ 1 ] [ "a|((aa*)*)*" regexp-states ] unit-test
+[ 2 ] [ "ab|((aa*)*)*b" regexp-states ] unit-test
+[ 4 ] [ "ab|cd" regexp-states ] unit-test
+[ 1 ] [ "(?i:[a-z]*|[A-Z]*)" regexp-states ] unit-test
+
+[
+ T{ transition-table
+ { transitions H{
+ { 0 H{ { CHAR: a 1 } { CHAR: b 1 } } }
+ { 1 H{ { CHAR: a 2 } { CHAR: b 2 } } }
+ { 2 H{ { CHAR: c 3 } } }
+ { 3 H{ } }
+ } }
+ { start-state 0 }
+ { final-states H{ { 3 3 } } }
+ }
+] [
+ T{ transition-table
+ { transitions H{
+ { 0 H{ { CHAR: a 1 } { CHAR: b 4 } } }
+ { 1 H{ { CHAR: a 2 } { CHAR: b 5 } } }
+ { 2 H{ { CHAR: c 3 } } }
+ { 3 H{ } }
+ { 4 H{ { CHAR: a 2 } { CHAR: b 5 } } }
+ { 5 H{ { CHAR: c 6 } } }
+ { 6 H{ } }
+ } }
+ { start-state 0 }
+ { final-states H{ { 3 3 } { 6 6 } } }
+ } combine-states
+] unit-test
+
+[ [ ] [ ] while-changes ] must-infer
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg
+! See http://factorcode.org/license.txt for BSD license.
+USING: kernel sequences regexp.transition-tables fry assocs
+accessors locals math sorting arrays sets hashtables regexp.dfa
+combinators.short-circuit regexp.classes ;
+IN: regexp.minimize
+
+: table>state-numbers ( table -- assoc )
+ transitions>> keys <enum> [ swap ] H{ } assoc-map-as ;
+
+: number-states ( table -- newtable )
+ dup table>state-numbers transitions-at ;
+
+: no-conditions? ( state transition-table -- ? )
+ transitions>> at values [ condition? ] any? not ;
+
+: initially-same? ( s1 s2 transition-table -- ? )
+ {
+ [ drop <= ]
+ [ transitions>> '[ _ at keys ] bi@ set= ]
+ [ final-states>> '[ _ key? ] bi@ = ]
+ } 3&& ;
+
+:: initialize-partitions ( transition-table -- partitions )
+ ! Partition table is sorted-array => ?
+ H{ } clone :> out
+ transition-table transitions>> keys
+ [ transition-table no-conditions? ] filter :> states
+ states [| s1 |
+ states [| s2 |
+ s1 s2 transition-table initially-same?
+ [ s1 s2 2array out conjoin ] when
+ ] each
+ ] each out ;
+
+: same-partition? ( s1 s2 partitions -- ? )
+ [ 2array natural-sort ] dip key? ;
+
+: assemble-values ( assoc1 assoc2 -- values )
+ dup keys '[ _ swap [ at ] curry map ] bi@ zip ;
+
+: stay-same? ( s1 s2 transition partitions -- ? )
+ [ '[ _ transitions>> at ] bi@ assemble-values ] dip
+ '[ _ same-partition? ] assoc-all? ;
+
+: partition-more ( partitions transition-table -- partitions )
+ over '[ drop first2 _ _ stay-same? ] assoc-filter ;
+
+: partition>classes ( partitions -- synonyms ) ! old-state => new-state
+ >alist sort-keys
+ [ drop first2 swap ] assoc-map
+ <reversed>
+ >hashtable ;
+
+:: (while-changes) ( obj quot: ( obj -- obj' ) comp: ( obj -- key ) old-key -- obj )
+ obj quot call :> new-obj
+ new-obj comp call :> new-key
+ new-key old-key =
+ [ new-obj ]
+ [ new-obj quot comp new-key (while-changes) ]
+ if ; inline recursive
+
+: while-changes ( obj quot pred -- obj' )
+ 3dup nip call (while-changes) ; inline
+
+: state-classes ( transition-table -- synonyms )
+ [ initialize-partitions ] keep
+ '[ _ partition-more ] [ assoc-size ] while-changes
+ partition>classes ;
+
+: canonical-state? ( state state-classes -- ? )
+ dupd at = ;
+
+: delete-duplicates ( transitions state-classes -- new-transitions )
+ '[ drop _ canonical-state? ] assoc-filter ;
+
+: rewrite-duplicates ( new-transitions state-classes -- new-transitions )
+ '[ [ _ at ] assoc-map ] assoc-map ;
+
+: combine-transitions ( transitions state-classes -- new-transitions )
+ [ delete-duplicates ] [ rewrite-duplicates ] bi ;
+
+: combine-states ( table -- smaller-table )
+ dup state-classes
+ [ combine-transitions ] rewrite-transitions ;
+
+: minimize ( table -- minimal-table )
+ clone number-states ; ! combine-states ;
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg.
+! See http://factorcode.org/license.txt for BSD license.
+USING: tools.test regexp.negation regexp.transition-tables regexp.classes ;
+IN: regexp.negation.tests
+
+[
+ ! R/ |[^a]|.+/
+ T{ transition-table
+ { transitions H{
+ { 0 H{ { CHAR: a 1 } { T{ not-class f CHAR: a } -1 } } }
+ { 1 H{ { t -1 } } }
+ { -1 H{ { t -1 } } }
+ } }
+ { start-state 0 }
+ { final-states H{ { 0 0 } { -1 -1 } } }
+ }
+] [
+ ! R/ a/
+ T{ transition-table
+ { transitions H{
+ { 0 H{ { CHAR: a 1 } } }
+ { 1 H{ } }
+ } }
+ { start-state 0 }
+ { final-states H{ { 1 1 } } }
+ } negate-table
+] unit-test
--- /dev/null
+! Copyright (C) 2009 Daniel Ehrenberg.
+! See http://factorcode.org/license.txt for BSD license.
+USING: regexp.nfa regexp.disambiguate kernel sequences
+assocs regexp.classes hashtables accessors fry vectors
+regexp.ast regexp.transition-tables regexp.minimize
+regexp.dfa namespaces ;
+IN: regexp.negation
+
+: ast>dfa ( parse-tree -- minimal-dfa )
+ construct-nfa disambiguate construct-dfa minimize ;
+
+CONSTANT: fail-state -1
+
+: add-default-transition ( state's-transitions -- new-state's-transitions )
+ clone dup
+ [ [ fail-state ] dip keys [ <not-class> ] map <and-class> ] keep set-at ;
+
+: fail-state-recurses ( transitions -- new-transitions )
+ clone dup
+ [ fail-state t associate fail-state ] dip set-at ;
+
+: add-fail-state ( transitions -- new-transitions )
+ [ add-default-transition ] assoc-map
+ fail-state-recurses ;
+
+: assoc>set ( assoc -- keys-set )
+ [ drop dup ] assoc-map ;
+
+: inverse-final-states ( transition-table -- final-states )
+ [ transitions>> assoc>set ] [ final-states>> ] bi assoc-diff ;
+
+: negate-table ( transition-table -- transition-table )
+ clone
+ [ add-fail-state ] change-transitions
+ dup inverse-final-states >>final-states ;
+
+: renumber-states ( transition-table -- transition-table )
+ dup transitions>> keys [ next-state ] H{ } map>assoc
+ transitions-at ;
+
+: box-transitions ( transition-table -- transition-table )
+ [ [ [ 1vector ] assoc-map ] assoc-map ] change-transitions ;
+
+: unify-final-state ( transition-table -- transition-table )
+ dup [ final-states>> keys ] keep
+ '[ -2 epsilon _ add-transition ] each
+ H{ { -2 -2 } } >>final-states ;
+
+: adjoin-dfa ( transition-table -- start end )
+ box-transitions unify-final-state renumber-states
+ [ start-state>> ]
+ [ final-states>> keys first ]
+ [ nfa-table get [ transitions>> ] bi@ swap update ] tri ;
+
+M: negation nfa-node ( node -- start end )
+ term>> ast>dfa negate-table adjoin-dfa ;
-! Copyright (C) 2008 Doug Coleman.
+! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs grouping kernel regexp.backend
-locals math namespaces regexp.parser sequences fry quotations
-math.order math.ranges vectors unicode.categories regexp.utils
-regexp.transition-tables words sets regexp.classes unicode.case.private ;
+USING: accessors arrays assocs grouping kernel
+locals math namespaces sequences fry quotations
+math.order math.ranges vectors unicode.categories
+regexp.transition-tables words sets hashtables combinators.short-circuit
+unicode.case.private regexp.ast regexp.classes ;
+IN: regexp.nfa
+
! This uses unicode.case.private for ch>upper and ch>lower
! but case-insensitive matching should be done by case-folding everything
! before processing starts
-IN: regexp.nfa
-ERROR: feature-is-broken feature ;
-
-SYMBOL: negation-mode
-: negated? ( -- ? ) negation-mode get 0 or odd? ;
-
-SINGLETON: eps
-
-MIXIN: traversal-flag
-SINGLETON: lookahead-on INSTANCE: lookahead-on traversal-flag
-SINGLETON: lookahead-off INSTANCE: lookahead-off traversal-flag
-SINGLETON: lookbehind-on INSTANCE: lookbehind-on traversal-flag
-SINGLETON: lookbehind-off INSTANCE: lookbehind-off traversal-flag
-SINGLETON: capture-group-on INSTANCE: capture-group-on traversal-flag
-SINGLETON: capture-group-off INSTANCE: capture-group-off traversal-flag
-SINGLETON: front-anchor INSTANCE: front-anchor traversal-flag
-SINGLETON: back-anchor INSTANCE: back-anchor traversal-flag
-SINGLETON: word-boundary INSTANCE: word-boundary traversal-flag
-
-: options ( -- obj ) current-regexp get options>> ;
-
-: option? ( obj -- ? ) options key? ;
-
-: option-on ( obj -- ) options conjoin ;
-
-: option-off ( obj -- ) options delete-at ;
-
-: next-state ( regexp -- state )
- [ state>> ] [ [ 1+ ] change-state drop ] bi ;
-
-: set-start-state ( regexp -- )
- dup stack>> [
- drop
- ] [
- [ nfa-table>> ] [ pop first ] bi* >>start-state drop
- ] if-empty ;
-
-GENERIC: nfa-node ( node -- )
-
-:: add-simple-entry ( obj class -- )
- [let* | regexp [ current-regexp get ]
- s0 [ regexp next-state ]
- s1 [ regexp next-state ]
- stack [ regexp stack>> ]
- table [ regexp nfa-table>> ] |
- negated? [
- s0 f obj class make-transition table add-transition
- s0 s1 <default-transition> table add-transition
- ] [
- s0 s1 obj class make-transition table add-transition
- ] if
- s0 s1 2array stack push
- t s1 table final-states>> set-at ] ;
-
-: add-traversal-flag ( flag -- )
- stack peek second
- current-regexp get nfa-traversal-flags>> push-at ;
-
-:: concatenate-nodes ( -- )
- [let* | regexp [ current-regexp get ]
- stack [ regexp stack>> ]
- table [ regexp nfa-table>> ]
- s2 [ stack peek first ]
- s3 [ stack pop second ]
- s0 [ stack peek first ]
- s1 [ stack pop second ] |
- s1 s2 eps <literal-transition> table add-transition
- s1 table final-states>> delete-at
- s0 s3 2array stack push ] ;
-
-:: alternate-nodes ( -- )
- [let* | regexp [ current-regexp get ]
- stack [ regexp stack>> ]
- table [ regexp nfa-table>> ]
- s2 [ stack peek first ]
- s3 [ stack pop second ]
- s0 [ stack peek first ]
- s1 [ stack pop second ]
- s4 [ regexp next-state ]
- s5 [ regexp next-state ] |
- s4 s0 eps <literal-transition> table add-transition
- s4 s2 eps <literal-transition> table add-transition
- s1 s5 eps <literal-transition> table add-transition
- s3 s5 eps <literal-transition> table add-transition
- s1 table final-states>> delete-at
- s3 table final-states>> delete-at
- t s5 table final-states>> set-at
- s4 s5 2array stack push ] ;
-
-M: kleene-star nfa-node ( node -- )
- term>> nfa-node
- [let* | regexp [ current-regexp get ]
- stack [ regexp stack>> ]
- s0 [ stack peek first ]
- s1 [ stack pop second ]
- s2 [ regexp next-state ]
- s3 [ regexp next-state ]
- table [ regexp nfa-table>> ] |
- s1 table final-states>> delete-at
- t s3 table final-states>> set-at
- s1 s0 eps <literal-transition> table add-transition
- s2 s0 eps <literal-transition> table add-transition
- s2 s3 eps <literal-transition> table add-transition
- s1 s3 eps <literal-transition> table add-transition
- s2 s3 2array stack push ] ;
-
-M: concatenation nfa-node ( node -- )
- seq>>
- reversed-regexp option? [ <reversed> ] when
- [ [ nfa-node ] each ]
- [ length 1- [ concatenate-nodes ] times ] bi ;
-
-M: alternation nfa-node ( node -- )
- seq>>
- [ [ nfa-node ] each ]
- [ length 1- [ alternate-nodes ] times ] bi ;
-
-M: constant nfa-node ( node -- )
- case-insensitive option? [
- dup char>> [ ch>lower ] [ ch>upper ] bi
- 2dup = [
- 2drop
- char>> literal-transition add-simple-entry
- ] [
- [ literal-transition add-simple-entry ] bi@
- alternate-nodes drop
- ] if
- ] [
- char>> literal-transition add-simple-entry
- ] if ;
+SYMBOL: option-stack
+
+SYMBOL: state
+
+: next-state ( -- state )
+ state [ get ] [ inc ] bi ;
+
+SYMBOL: nfa-table
+
+: set-each ( keys value hashtable -- )
+ '[ _ swap _ set-at ] each ;
+
+: options>hash ( options -- hashtable )
+ H{ } clone [
+ [ [ on>> t ] dip set-each ]
+ [ [ off>> f ] dip set-each ] 2bi
+ ] keep ;
+
+: using-options ( options quot -- )
+ [ options>hash option-stack [ ?push ] change ] dip
+ call option-stack get pop* ; inline
+
+: option? ( obj -- ? )
+ option-stack get assoc-stack ;
+
+GENERIC: nfa-node ( node -- start-state end-state )
+
+: add-simple-entry ( obj -- start-state end-state )
+ [ next-state next-state 2dup ] dip
+ nfa-table get add-transition ;
+
+: epsilon-transition ( source target -- )
+ epsilon nfa-table get add-transition ;
-M: epsilon nfa-node ( node -- )
- drop eps literal-transition add-simple-entry ;
+M:: star nfa-node ( node -- start end )
+ node term>> nfa-node :> s1 :> s0
+ next-state :> s2
+ next-state :> s3
+ s1 s0 epsilon-transition
+ s2 s0 epsilon-transition
+ s2 s3 epsilon-transition
+ s1 s3 epsilon-transition
+ s2 s3 ;
-M: word nfa-node ( node -- ) class-transition add-simple-entry ;
+GENERIC: modify-epsilon ( tag -- newtag )
+! Potential off-by-one errors when lookaround nested in lookbehind
-M: any-char nfa-node ( node -- )
- [ dotall option? ] dip any-char-no-nl ?
- class-transition add-simple-entry ;
+M: object modify-epsilon ;
-! M: beginning-of-text nfa-node ( node -- ) ;
+M: $ modify-epsilon
+ multiline option? [ drop end-of-input ] unless ;
-M: beginning-of-line nfa-node ( node -- ) class-transition add-simple-entry ;
+M: ^ modify-epsilon
+ multiline option? [ drop beginning-of-input ] unless ;
-M: end-of-line nfa-node ( node -- ) class-transition add-simple-entry ;
+M: tagged-epsilon nfa-node
+ clone [ modify-epsilon ] change-tag add-simple-entry ;
-: choose-letter-class ( node -- node' )
- case-insensitive option? Letter-class rot ? ;
+M: concatenation nfa-node ( node -- start end )
+ [ first>> ] [ second>> ] bi
+ reversed-regexp option? [ swap ] when
+ [ nfa-node ] bi@
+ [ epsilon-transition ] dip ;
-M: letter-class nfa-node ( node -- )
- choose-letter-class class-transition add-simple-entry ;
+:: alternate-nodes ( s0 s1 s2 s3 -- start end )
+ next-state :> s4
+ next-state :> s5
+ s4 s0 epsilon-transition
+ s4 s2 epsilon-transition
+ s1 s5 epsilon-transition
+ s3 s5 epsilon-transition
+ s4 s5 ;
-M: LETTER-class nfa-node ( node -- )
- choose-letter-class class-transition add-simple-entry ;
+M: alternation nfa-node ( node -- start end )
+ [ first>> ] [ second>> ] bi
+ [ nfa-node ] bi@
+ alternate-nodes ;
-M: character-class-range nfa-node ( node -- )
+GENERIC: modify-class ( char-class -- char-class' )
+
+M: object modify-class ;
+
+M: integer modify-class
+ case-insensitive option? [
+ dup Letter? [
+ [ ch>lower ] [ ch>upper ] bi 2array <or-class>
+ ] when
+ ] when ;
+
+M: integer nfa-node ( node -- start end )
+ modify-class add-simple-entry ;
+
+M: primitive-class modify-class
+ class>> modify-class <primitive-class> ;
+
+M: or-class modify-class
+ seq>> [ modify-class ] map <or-class> ;
+
+M: not-class modify-class
+ class>> modify-class <not-class> ;
+
+M: any-char modify-class
+ drop dotall option? t any-char-no-nl ? ;
+
+: modify-letter-class ( class -- newclass )
+ case-insensitive option? [ drop Letter-class ] when ;
+M: letter-class modify-class modify-letter-class ;
+M: LETTER-class modify-class modify-letter-class ;
+
+: cased-range? ( range -- ? )
+ [ from>> ] [ to>> ] bi {
+ [ [ letter? ] bi@ and ]
+ [ [ LETTER? ] bi@ and ]
+ } 2|| ;
+
+M: range modify-class
case-insensitive option? [
- ! This should be implemented for Unicode by case-folding
- ! the input and all strings in the regexp.
- dup [ from>> ] [ to>> ] bi
- 2dup [ Letter? ] bi@ and [
- rot drop
- [ [ ch>lower ] bi@ character-class-range boa ]
- [ [ ch>upper ] bi@ character-class-range boa ] 2bi
- [ class-transition add-simple-entry ] bi@
- alternate-nodes
- ] [
- 2drop
- class-transition add-simple-entry
- ] if
- ] [
- class-transition add-simple-entry
- ] if ;
-
-M: capture-group nfa-node ( node -- )
- "capture-groups" feature-is-broken
- eps literal-transition add-simple-entry
- capture-group-on add-traversal-flag
- term>> nfa-node
- eps literal-transition add-simple-entry
- capture-group-off add-traversal-flag
- 2 [ concatenate-nodes ] times ;
-
-! xyzzy
-M: non-capture-group nfa-node ( node -- )
- term>> nfa-node ;
-
-M: reluctant-kleene-star nfa-node ( node -- )
- term>> <kleene-star> nfa-node ;
-
-M: negation nfa-node ( node -- )
- negation-mode inc
- term>> nfa-node
- negation-mode dec ;
-
-M: lookahead nfa-node ( node -- )
- "lookahead" feature-is-broken
- eps literal-transition add-simple-entry
- lookahead-on add-traversal-flag
- term>> nfa-node
- eps literal-transition add-simple-entry
- lookahead-off add-traversal-flag
- 2 [ concatenate-nodes ] times ;
-
-M: lookbehind nfa-node ( node -- )
- "lookbehind" feature-is-broken
- eps literal-transition add-simple-entry
- lookbehind-on add-traversal-flag
- term>> nfa-node
- eps literal-transition add-simple-entry
- lookbehind-off add-traversal-flag
- 2 [ concatenate-nodes ] times ;
-
-M: option nfa-node ( node -- )
- [ option>> ] [ on?>> ] bi [ option-on ] [ option-off ] if
- eps literal-transition add-simple-entry ;
-
-: construct-nfa ( regexp -- )
+ dup cased-range? [
+ [ from>> ] [ to>> ] bi
+ [ [ ch>lower ] bi@ <range> ]
+ [ [ ch>upper ] bi@ <range> ] 2bi
+ 2array <or-class>
+ ] when
+ ] when ;
+
+M: class nfa-node
+ modify-class add-simple-entry ;
+
+M: with-options nfa-node ( node -- start end )
+ dup options>> [ tree>> nfa-node ] using-options ;
+
+: construct-nfa ( ast -- nfa-table )
[
- reset-regexp
- negation-mode off
- [ current-regexp set ]
- [ parse-tree>> nfa-node ]
- [ set-start-state ] tri
+ 0 state set
+ <transition-table> nfa-table set
+ nfa-node
+ nfa-table get
+ swap dup associate >>final-states
+ swap >>start-state
] with-scope ;
-USING: kernel tools.test regexp.backend regexp ;
-IN: regexp.parser
+USING: kernel tools.test regexp.parser fry sequences ;
+IN: regexp.parser.tests
-: test-regexp ( string -- )
- default-regexp parse-regexp ;
+: regexp-parses ( string -- )
+ [ [ ] ] dip '[ _ parse-regexp drop ] unit-test ;
-! [ "(" ] [ unmatched-parentheses? ] must-fail-with
+: regexp-fails ( string -- )
+ '[ _ parse-regexp ] must-fail ;
-[ ] [ "a|b" test-regexp ] unit-test
-[ ] [ "a.b" test-regexp ] unit-test
-[ ] [ "a|b|c" test-regexp ] unit-test
-[ ] [ "abc|b" test-regexp ] unit-test
-[ ] [ "a|bcd" test-regexp ] unit-test
-[ ] [ "a|(b)" test-regexp ] unit-test
-[ ] [ "(a)|b" test-regexp ] unit-test
-[ ] [ "(a|b)" test-regexp ] unit-test
-[ ] [ "((a)|(b))" test-regexp ] unit-test
+{
+ "a|b" "a.b" "a|b|c" "abc|b" "a|bcd" "a|(b)" "(?-i:a)" "||"
+ "(a)|b" "(a|b)" "((a)|(b))" "(?:a)" "(?i:a)" "|b" "b|"
+ "[abc]" "[a-c]" "[^a-c]" "[^]]" "[]a]" "[[]" "[]-a]" "[a-]" "[-]"
+ "[--a]" "foo*" "(foo)*" "(a|b)|c" "(foo){2,3}" "(foo){2,}"
+ "(foo){2}" "{2,3}" "{," "{,}" "}" "foo}" "[^]-a]" "[^-]a]"
+ "[a-]" "[^a-]" "[^a-]" "a{,2}" "(?#foobar)"
+ "\\p{Space}" "\\t" "\\[" "[\\]]" "\\P{Space}"
+ "\\ueeee" "\\0333" "\\xff" "\\\\" "\\w"
+} [ regexp-parses ] each
-[ ] [ "(?:a)" test-regexp ] unit-test
-[ ] [ "(?i:a)" test-regexp ] unit-test
-[ ] [ "(?-i:a)" test-regexp ] unit-test
-[ "(?z:a)" test-regexp ] [ unknown-regexp-option? ] must-fail-with
-[ "(?-z:a)" test-regexp ] [ unknown-regexp-option? ] must-fail-with
-
-[ ] [ "(?=a)" test-regexp ] unit-test
-
-[ ] [ "[abc]" test-regexp ] unit-test
-[ ] [ "[a-c]" test-regexp ] unit-test
-[ ] [ "[^a-c]" test-regexp ] unit-test
-[ "[^]" test-regexp ] must-fail
-
-[ ] [ "|b" test-regexp ] unit-test
-[ ] [ "b|" test-regexp ] unit-test
-[ ] [ "||" test-regexp ] unit-test
+{
+ "[^]" "[]" "a{foo}" "a{,}" "a{}" "(?)" "\\p{foo}" "\\P{foo}"
+ "\\ueeeg" "\\0339" "\\xfg"
+} [ regexp-fails ] each
-! Copyright (C) 2008 Doug Coleman.
+! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs combinators io io.streams.string
-kernel math math.parser namespaces sets
-quotations sequences splitting vectors math.order
-strings regexp.backend regexp.utils
-unicode.case unicode.categories words locals regexp.classes ;
+USING: peg.ebnf kernel math.parser sequences assocs arrays fry math
+combinators regexp.classes strings splitting peg locals accessors
+regexp.ast ;
IN: regexp.parser
-FROM: math.ranges => [a,b] ;
-
-TUPLE: concatenation seq ; INSTANCE: concatenation node
-TUPLE: alternation seq ; INSTANCE: alternation node
-TUPLE: kleene-star term ; INSTANCE: kleene-star node
-
-! !!!!!!!!
-TUPLE: possessive-question term ; INSTANCE: possessive-question node
-TUPLE: possessive-kleene-star term ; INSTANCE: possessive-kleene-star node
-
-! !!!!!!!!
-TUPLE: reluctant-question term ; INSTANCE: reluctant-question node
-TUPLE: reluctant-kleene-star term ; INSTANCE: reluctant-kleene-star node
-
-TUPLE: negation term ; INSTANCE: negation node
-TUPLE: constant char ; INSTANCE: constant node
-TUPLE: range from to ; INSTANCE: range node
-
-MIXIN: parentheses-group
-TUPLE: lookahead term ; INSTANCE: lookahead node
-INSTANCE: lookahead parentheses-group
-TUPLE: lookbehind term ; INSTANCE: lookbehind node
-INSTANCE: lookbehind parentheses-group
-TUPLE: capture-group term ; INSTANCE: capture-group node
-INSTANCE: capture-group parentheses-group
-TUPLE: non-capture-group term ; INSTANCE: non-capture-group node
-INSTANCE: non-capture-group parentheses-group
-TUPLE: independent-group term ; INSTANCE: independent-group node ! atomic group
-INSTANCE: independent-group parentheses-group
-TUPLE: comment-group term ; INSTANCE: comment-group node
-INSTANCE: comment-group parentheses-group
-
-SINGLETON: epsilon INSTANCE: epsilon node
-
-TUPLE: option option on? ; INSTANCE: option node
-
-SINGLETONS: unix-lines dotall multiline comments case-insensitive
-unicode-case reversed-regexp ;
-
-SINGLETONS: beginning-of-character-class end-of-character-class
-left-parenthesis pipe caret dash ;
-
-: push1 ( obj -- ) input-stream get stream>> push ;
-: peek1 ( -- obj ) input-stream get stream>> [ f ] [ peek ] if-empty ;
-: pop3 ( seq -- obj1 obj2 obj3 ) [ pop ] [ pop ] [ pop ] tri spin ;
-: drop1 ( -- ) read1 drop ;
-
-: stack ( -- obj ) current-regexp get stack>> ;
-: change-whole-stack ( quot -- )
- current-regexp get
- [ stack>> swap call ] keep (>>stack) ; inline
-: push-stack ( obj -- ) stack push ;
-: pop-stack ( -- obj ) stack pop ;
-: cut-out ( vector n -- vector' vector ) cut rest ;
-ERROR: cut-stack-error ;
-: cut-stack ( obj vector -- vector' vector )
- [ nip ] [ last-index ] 2bi [ cut-stack-error ] unless* cut-out swap ;
-
-: <possessive-kleene-star> ( obj -- kleene ) possessive-kleene-star boa ;
-: <reluctant-kleene-star> ( obj -- kleene ) reluctant-kleene-star boa ;
-: <possessive-question> ( obj -- kleene ) possessive-question boa ;
-: <reluctant-question> ( obj -- kleene ) reluctant-question boa ;
-
-: <negation> ( obj -- negation ) negation boa ;
-: <concatenation> ( seq -- concatenation )
- >vector [ epsilon ] [ concatenation boa ] if-empty ;
-: <alternation> ( seq -- alternation ) >vector alternation boa ;
-: <capture-group> ( obj -- capture-group ) capture-group boa ;
-: <kleene-star> ( obj -- kleene-star ) kleene-star boa ;
-: <constant> ( obj -- constant ) constant boa ;
-
-: first|concatenation ( seq -- first/concatenation )
- dup length 1 = [ first ] [ <concatenation> ] if ;
-
-: first|alternation ( seq -- first/alternation )
- dup length 1 = [ first ] [ <alternation> ] if ;
-
-: <character-class-range> ( from to -- obj )
- 2dup <
- [ character-class-range boa ] [ 2drop unmatchable-class ] if ;
-
-ERROR: unmatched-parentheses ;
-
-ERROR: unknown-regexp-option option ;
+: allowed-char? ( ch -- ? )
+ ".()|[*+?$^" member? not ;
-: ch>option ( ch -- singleton )
+ERROR: bad-number ;
+
+: ensure-number ( n -- n )
+ [ bad-number ] unless* ;
+
+:: at-error ( key assoc quot: ( key -- replacement ) -- value )
+ key assoc at* [ drop key quot call ] unless ; inline
+
+ERROR: bad-class name ;
+
+: name>class ( name -- class )
+ {
+ { "Lower" letter-class }
+ { "Upper" LETTER-class }
+ { "Alpha" Letter-class }
+ { "ASCII" ascii-class }
+ { "Digit" digit-class }
+ { "Alnum" alpha-class }
+ { "Punct" punctuation-class }
+ { "Graph" java-printable-class }
+ { "Print" java-printable-class }
+ { "Blank" non-newline-blank-class }
+ { "Cntrl" control-character-class }
+ { "XDigit" hex-digit-class }
+ { "Space" java-blank-class }
+ ! TODO: unicode-character-class
+ } [ bad-class ] at-error ;
+
+: lookup-escape ( char -- ast )
{
- { CHAR: i [ case-insensitive ] }
- { CHAR: d [ unix-lines ] }
- { CHAR: m [ multiline ] }
- { CHAR: n [ multiline ] }
- { CHAR: r [ reversed-regexp ] }
- { CHAR: s [ dotall ] }
- { CHAR: u [ unicode-case ] }
- { CHAR: x [ comments ] }
- [ unknown-regexp-option ]
+ { CHAR: t [ CHAR: \t ] }
+ { CHAR: n [ CHAR: \n ] }
+ { CHAR: r [ CHAR: \r ] }
+ { CHAR: f [ HEX: c ] }
+ { CHAR: a [ HEX: 7 ] }
+ { CHAR: e [ HEX: 1b ] }
+ { CHAR: \\ [ CHAR: \\ ] }
+
+ { CHAR: w [ c-identifier-class <primitive-class> ] }
+ { CHAR: W [ c-identifier-class <primitive-class> <not-class> ] }
+ { CHAR: s [ java-blank-class <primitive-class> ] }
+ { CHAR: S [ java-blank-class <primitive-class> <not-class> ] }
+ { CHAR: d [ digit-class <primitive-class> ] }
+ { CHAR: D [ digit-class <primitive-class> <not-class> ] }
+
+ { CHAR: z [ end-of-input <tagged-epsilon> ] }
+ { CHAR: Z [ end-of-file <tagged-epsilon> ] }
+ { CHAR: A [ beginning-of-input <tagged-epsilon> ] }
+ [ ]
} case ;
+: options-assoc ( -- assoc )
+ H{
+ { CHAR: i case-insensitive }
+ { CHAR: d unix-lines }
+ { CHAR: m multiline }
+ { CHAR: n multiline }
+ { CHAR: r reversed-regexp }
+ { CHAR: s dotall }
+ { CHAR: u unicode-case }
+ { CHAR: x comments }
+ } ;
+
+: ch>option ( ch -- singleton )
+ options-assoc at ;
+
: option>ch ( option -- string )
- {
- { case-insensitive [ CHAR: i ] }
- { multiline [ CHAR: m ] }
- { reversed-regexp [ CHAR: r ] }
- { dotall [ CHAR: s ] }
- [ unknown-regexp-option ]
- } case ;
+ options-assoc value-at ;
-: toggle-option ( ch ? -- )
- [ ch>option ] dip option boa push-stack ;
-
-: (parse-options) ( string ? -- ) [ toggle-option ] curry each ;
-
-: parse-options ( string -- )
- "-" split1 [ t (parse-options) ] [ f (parse-options) ] bi* ;
-
-ERROR: bad-special-group string ;
-
-DEFER: (parse-regexp)
-: nested-parse-regexp ( token ? -- )
- [ push-stack (parse-regexp) pop-stack ] dip
- [ <negation> ] when pop-stack new swap >>term push-stack ;
-
-! non-capturing groups
-: (parse-special-group) ( -- )
- read1 {
- { [ dup CHAR: # = ] ! comment
- [ drop comment-group f nested-parse-regexp pop-stack drop ] }
- { [ dup CHAR: : = ]
- [ drop non-capture-group f nested-parse-regexp ] }
- { [ dup CHAR: = = ]
- [ drop lookahead f nested-parse-regexp ] }
- { [ dup CHAR: ! = ]
- [ drop lookahead t nested-parse-regexp ] }
- { [ dup CHAR: > = ]
- [ drop non-capture-group f nested-parse-regexp ] }
- { [ dup CHAR: < = peek1 CHAR: = = and ]
- [ drop drop1 lookbehind f nested-parse-regexp ] }
- { [ dup CHAR: < = peek1 CHAR: ! = and ]
- [ drop drop1 lookbehind t nested-parse-regexp ] }
- [
- ":)" read-until
- [ swap prefix ] dip
- {
- { CHAR: : [ parse-options non-capture-group f nested-parse-regexp ] }
- { CHAR: ) [ parse-options ] }
- [ drop bad-special-group ]
- } case
- ]
- } cond ;
-
-: handle-left-parenthesis ( -- )
- peek1 CHAR: ? =
- [ drop1 (parse-special-group) ]
- [ capture-group f nested-parse-regexp ] if ;
-
-: handle-dot ( -- ) any-char push-stack ;
-: handle-pipe ( -- ) pipe push-stack ;
-: (handle-star) ( obj -- kleene-star )
- peek1 {
- { CHAR: + [ drop1 <possessive-kleene-star> ] }
- { CHAR: ? [ drop1 <reluctant-kleene-star> ] }
- [ drop <kleene-star> ]
- } case ;
-: handle-star ( -- ) stack pop (handle-star) push-stack ;
-: handle-question ( -- )
- stack pop peek1 {
- { CHAR: + [ drop1 <possessive-question> ] }
- { CHAR: ? [ drop1 <reluctant-question> ] }
- [ drop epsilon 2array <alternation> ]
- } case push-stack ;
-: handle-plus ( -- )
- stack pop dup (handle-star)
- 2array <concatenation> push-stack ;
-
-ERROR: unmatched-brace ;
-: parse-repetition ( -- start finish ? )
- "}" read-until [ unmatched-brace ] unless
- [ "," split1 [ string>number ] bi@ ]
- [ CHAR: , swap index >boolean ] bi ;
-
-: replicate/concatenate ( n obj -- obj' )
- over zero? [ 2drop epsilon ]
- [ <repetition> first|concatenation ] if ;
-
-: exactly-n ( n -- )
- stack pop replicate/concatenate push-stack ;
-
-: at-least-n ( n -- )
- stack pop
- [ replicate/concatenate ] keep
- <kleene-star> 2array <concatenation> push-stack ;
-
-: at-most-n ( n -- )
- 1+
- stack pop
- [ replicate/concatenate ] curry map <alternation> push-stack ;
-
-: from-m-to-n ( m n -- )
- [a,b]
- stack pop
- [ replicate/concatenate ] curry map
- <alternation> push-stack ;
-
-ERROR: invalid-range a b ;
-
-: handle-left-brace ( -- )
- parse-repetition
- [ 2dup [ [ 0 < [ invalid-range ] when ] when* ] bi@ ] dip
- [
- 2dup and [ from-m-to-n ]
- [ [ nip at-most-n ] [ at-least-n ] if* ] if
- ] [ drop 0 max exactly-n ] if ;
-
-: handle-front-anchor ( -- ) beginning-of-line push-stack ;
-: handle-back-anchor ( -- ) end-of-line push-stack ;
-
-ERROR: bad-character-class obj ;
-ERROR: expected-posix-class ;
-
-: parse-posix-class ( -- obj )
- read1 CHAR: { = [ expected-posix-class ] unless
- "}" read-until [ bad-character-class ] unless
- {
- { "Lower" [ letter-class ] }
- { "Upper" [ LETTER-class ] }
- { "Alpha" [ Letter-class ] }
- { "ASCII" [ ascii-class ] }
- { "Digit" [ digit-class ] }
- { "Alnum" [ alpha-class ] }
- { "Punct" [ punctuation-class ] }
- { "Graph" [ java-printable-class ] }
- { "Print" [ java-printable-class ] }
- { "Blank" [ non-newline-blank-class ] }
- { "Cntrl" [ control-character-class ] }
- { "XDigit" [ hex-digit-class ] }
- { "Space" [ java-blank-class ] }
- ! TODO: unicode-character-class, fallthrough in unicode is bad-char-clss
- [ bad-character-class ]
- } case ;
+: parse-options ( on off -- options )
+ [ [ ch>option ] { } map-as ] bi@ <options> ;
-: parse-octal ( -- n ) 3 read oct> check-octal ;
-: parse-short-hex ( -- n ) 2 read hex> check-hex ;
-: parse-long-hex ( -- n ) 6 read hex> check-hex ;
-: parse-control-character ( -- n ) read1 ;
+: string>options ( string -- options )
+ "-" split1 parse-options ;
+
+: options>string ( options -- string )
+ [ on>> ] [ off>> ] bi
+ [ [ option>ch ] map ] bi@
+ [ "-" glue ] unless-empty
+ "" like ;
-ERROR: bad-escaped-literals seq ;
+! TODO: add syntax for various parenthized things,
+! add greedy and nongreedy forms of matching
+! (once it's all implemented)
-: parse-til-E ( -- obj )
- "\\E" read-until [ bad-escaped-literals ] unless ;
-
-:: (parse-escaped-literals) ( quot: ( obj -- obj' ) -- obj )
- parse-til-E
- drop1
- [ epsilon ] [
- quot call [ <constant> ] V{ } map-as
- first|concatenation
- ] if-empty ; inline
+EBNF: parse-regexp
-: parse-escaped-literals ( -- obj )
- [ ] (parse-escaped-literals) ;
+CharacterInBracket = !("}") Character
-: lower-case-literals ( -- obj )
- [ >lower ] (parse-escaped-literals) ;
+QuotedCharacter = !("\\E") .
-: upper-case-literals ( -- obj )
- [ >upper ] (parse-escaped-literals) ;
+Escape = "p{" CharacterInBracket*:s "}" => [[ s >string name>class <primitive-class> ]]
+ | "P{" CharacterInBracket*:s "}" => [[ s >string name>class <primitive-class> <negation> ]]
+ | "Q" QuotedCharacter*:s "\\E" => [[ s <concatenation> ]]
+ | "u" Character:a Character:b Character:c Character:d
+ => [[ { a b c d } hex> ensure-number ]]
+ | "x" Character:a Character:b
+ => [[ { a b } hex> ensure-number ]]
+ | "0" Character:a Character:b Character:c
+ => [[ { a b c } oct> ensure-number ]]
+ | . => [[ lookup-escape ]]
-: parse-escaped ( -- obj )
- read1
- {
- { CHAR: t [ CHAR: \t <constant> ] }
- { CHAR: n [ CHAR: \n <constant> ] }
- { CHAR: r [ CHAR: \r <constant> ] }
- { CHAR: f [ HEX: c <constant> ] }
- { CHAR: a [ HEX: 7 <constant> ] }
- { CHAR: e [ HEX: 1b <constant> ] }
-
- { CHAR: w [ c-identifier-class ] }
- { CHAR: W [ c-identifier-class <negation> ] }
- { CHAR: s [ java-blank-class ] }
- { CHAR: S [ java-blank-class <negation> ] }
- { CHAR: d [ digit-class ] }
- { CHAR: D [ digit-class <negation> ] }
-
- { CHAR: p [ parse-posix-class ] }
- { CHAR: P [ parse-posix-class <negation> ] }
- { CHAR: x [ parse-short-hex <constant> ] }
- { CHAR: u [ parse-long-hex <constant> ] }
- { CHAR: 0 [ parse-octal <constant> ] }
- { CHAR: c [ parse-control-character ] }
-
- { CHAR: Q [ parse-escaped-literals ] }
-
- ! { CHAR: b [ word-boundary-class ] }
- ! { CHAR: B [ word-boundary-class <negation> ] }
- ! { CHAR: A [ handle-beginning-of-input ] }
- ! { CHAR: z [ handle-end-of-input ] }
-
- ! { CHAR: Z [ handle-end-of-input ] } ! plus a final terminator
-
- ! m//g mode
- ! { CHAR: G [ end of previous match ] }
-
- ! Group capture
- ! { CHAR: 1 [ CHAR: 1 <constant> ] }
- ! { CHAR: 2 [ CHAR: 2 <constant> ] }
- ! { CHAR: 3 [ CHAR: 3 <constant> ] }
- ! { CHAR: 4 [ CHAR: 4 <constant> ] }
- ! { CHAR: 5 [ CHAR: 5 <constant> ] }
- ! { CHAR: 6 [ CHAR: 6 <constant> ] }
- ! { CHAR: 7 [ CHAR: 7 <constant> ] }
- ! { CHAR: 8 [ CHAR: 8 <constant> ] }
- ! { CHAR: 9 [ CHAR: 9 <constant> ] }
-
- ! Perl extensions
- ! can't do \l and \u because \u is already a 4-hex
- { CHAR: L [ lower-case-literals ] }
- { CHAR: U [ upper-case-literals ] }
-
- [ <constant> ]
- } case ;
+EscapeSequence = "\\" Escape:e => [[ e ]]
-: handle-escape ( -- ) parse-escaped push-stack ;
-
-: handle-dash ( vector -- vector' )
- H{ { dash CHAR: - } } substitute ;
-
-: character-class>alternation ( seq -- alternation )
- [ dup number? [ <constant> ] when ] map first|alternation ;
-
-: handle-caret ( vector -- vector' )
- dup [ length 2 >= ] [ first caret eq? ] bi and [
- rest-slice character-class>alternation <negation>
- ] [
- character-class>alternation
- ] if ;
-
-: make-character-class ( -- character-class )
- [ beginning-of-character-class swap cut-stack ] change-whole-stack
- handle-dash handle-caret ;
-
-: apply-dash ( -- )
- stack [ pop3 nip <character-class-range> ] keep push ;
-
-: apply-dash? ( -- ? )
- stack dup length 3 >=
- [ [ length 2 - ] keep nth dash eq? ] [ drop f ] if ;
-
-ERROR: empty-negated-character-class ;
-DEFER: handle-left-bracket
-: (parse-character-class) ( -- )
- read1 [ empty-negated-character-class ] unless* {
- { CHAR: [ [ handle-left-bracket t ] }
- { CHAR: ] [ make-character-class push-stack f ] }
- { CHAR: - [ dash push-stack t ] }
- { CHAR: \ [ parse-escaped push-stack t ] }
- [ push-stack apply-dash? [ apply-dash ] when t ]
- } case
- [ (parse-character-class) ] when ;
-
-: push-constant ( ch -- ) <constant> push-stack ;
-
-: parse-character-class-second ( -- )
- read1 {
- { CHAR: [ [ CHAR: [ push-constant ] }
- { CHAR: ] [ CHAR: ] push-constant ] }
- { CHAR: - [ CHAR: - push-constant ] }
- [ push1 ]
- } case ;
+Character = EscapeSequence
+ | "$" => [[ $ <tagged-epsilon> ]]
+ | "^" => [[ ^ <tagged-epsilon> ]]
+ | . ?[ allowed-char? ]?
-: parse-character-class-first ( -- )
- read1 {
- { CHAR: ^ [ caret push-stack parse-character-class-second ] }
- { CHAR: [ [ CHAR: [ push-constant ] }
- { CHAR: ] [ CHAR: ] push-constant ] }
- { CHAR: - [ CHAR: - push-constant ] }
- [ push1 ]
- } case ;
+AnyRangeCharacter = EscapeSequence | .
-: handle-left-bracket ( -- )
- beginning-of-character-class push-stack
- parse-character-class-first (parse-character-class) ;
+RangeCharacter = !("]") AnyRangeCharacter
-: finish-regexp-parse ( stack -- obj )
- { pipe } split
- [ first|concatenation ] map first|alternation ;
+Range = RangeCharacter:a "-" RangeCharacter:b => [[ a b <range> ]]
+ | RangeCharacter
-: handle-right-parenthesis ( -- )
- stack dup [ parentheses-group "members" word-prop member? ] find-last
- -rot cut rest
- [ [ push ] keep current-regexp get (>>stack) ]
- [ finish-regexp-parse push-stack ] bi* ;
+StartRange = AnyRangeCharacter:a "-" RangeCharacter:b => [[ a b <range> ]]
+ | AnyRangeCharacter
-: parse-regexp-token ( token -- ? )
- {
- { CHAR: ( [ handle-left-parenthesis t ] } ! handle (?..) at beginning?
- { CHAR: ) [ handle-right-parenthesis f ] }
- { CHAR: . [ handle-dot t ] }
- { CHAR: | [ handle-pipe t ] }
- { CHAR: ? [ handle-question t ] }
- { CHAR: * [ handle-star t ] }
- { CHAR: + [ handle-plus t ] }
- { CHAR: { [ handle-left-brace t ] }
- { CHAR: [ [ handle-left-bracket t ] }
- { CHAR: \ [ handle-escape t ] }
- [
- dup CHAR: $ = peek1 f = and
- [ drop handle-back-anchor f ]
- [ push-constant t ] if
- ]
- } case ;
+Ranges = StartRange:s Range*:r => [[ r s prefix ]]
+
+CharClass = "^"?:n Ranges:e => [[ e n char-class ]]
+
+Options = [idmsux]*
+
+Parenthized = "?:" Alternation:a => [[ a ]]
+ | "?" Options:on "-"? Options:off ":" Alternation:a
+ => [[ a on off parse-options <with-options> ]]
+ | "?#" [^)]* => [[ f ]]
+ | "?~" Alternation:a => [[ a <negation> ]]
+ | "?=" Alternation:a => [[ a <lookahead> <tagged-epsilon> ]]
+ | "?!" Alternation:a => [[ a <negation> <lookahead> <tagged-epsilon> ]]
+ | "?<=" Alternation:a => [[ a <lookbehind> <tagged-epsilon> ]]
+ | "?<!" Alternation:a => [[ a <negation> <lookbehind> <tagged-epsilon> ]]
+ | Alternation
+
+Element = "(" Parenthized:p ")" => [[ p ]]
+ | "[" CharClass:r "]" => [[ r ]]
+ | ".":d => [[ any-char <primitive-class> ]]
+ | Character
+
+Number = (!(","|"}").)* => [[ string>number ensure-number ]]
+
+Times = "," Number:n "}" => [[ 0 n <from-to> ]]
+ | Number:n ",}" => [[ n <at-least> ]]
+ | Number:n "}" => [[ n n <from-to> ]]
+ | "}" => [[ bad-number ]]
+ | Number:n "," Number:m "}" => [[ n m <from-to> ]]
+
+Repeated = Element:e "{" Times:t => [[ e t <times> ]]
+ | Element:e "*+" => [[ e <possessive-star> ]]
+ | Element:e "++" => [[ e <possessive-plus> ]]
+ | Element:e "?" => [[ e <maybe> ]]
+ | Element:e "*" => [[ e <star> ]]
+ | Element:e "+" => [[ e <plus> ]]
+ | Element
+
+Concatenation = Repeated*:r => [[ r sift <concatenation> ]]
+
+Alternation = Concatenation:c ("|" Concatenation)*:a
+ => [[ a empty? [ c ] [ a values c prefix <alternation> ] if ]]
+
+End = !(.)
-: (parse-regexp) ( -- )
- read1 [ parse-regexp-token [ (parse-regexp) ] when ] when* ;
-
-: parse-regexp-beginning ( -- )
- peek1 CHAR: ^ = [ drop1 handle-front-anchor ] when ;
-
-: parse-regexp ( regexp -- )
- dup current-regexp [
- raw>> [
- <string-reader> [
- parse-regexp-beginning (parse-regexp)
- ] with-input-stream
- ] unless-empty
- current-regexp get [ finish-regexp-parse ] change-stack
- dup stack>> >>parse-tree drop
- ] with-variable ;
+Main = Alternation End
+;EBNF
-! Copyright (C) 2008 Doug Coleman.
+! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
! See http://factorcode.org/license.txt for BSD license.
-USING: kernel strings help.markup help.syntax regexp.backend ;
+USING: kernel strings help.markup help.syntax regexp.matchers ;
IN: regexp
+ABOUT: "regexp"
+
+ARTICLE: "regexp" "Regular expressions"
+"The " { $vocab-link "regexp" } " vocabulary provides word for creating and using regular expressions."
+{ $subsection { "regexp" "syntax" } }
+{ $subsection { "regexp" "construction" } }
+{ $vocab-subsection "regexp.combinators" "Regular expression combinators" }
+{ $subsection { "regexp" "operations" } }
+{ $subsection regexp }
+{ $subsection { "regexp" "theory" } } ;
+
+ARTICLE: { "regexp" "construction" } "Constructing regular expressions"
+"Words which are useful for creating regular expressions:"
+{ $subsection POSTPONE: R/ }
+{ $subsection <regexp> }
+{ $subsection <optioned-regexp> }
+{ $heading "See also" }
+{ $vocab-link "regexp.combinators" } ;
+
+ARTICLE: { "regexp" "syntax" } "Regular expression syntax"
+"Regexp syntax is largely compatible with Perl, Java and extended POSTFIX regexps, but not completely." $nl
+"A new addition is the inclusion of a negation operator, with the syntax " { $snippet "(?~foo)" } " to match everything that does not match " { $snippet "foo" } "." $nl
+"One missing feature is backreferences. This is because of a design decision to allow only regular expressions following the formal theory of regular languages. For more information, see " { $link { "regexp" "theory" } } ". You can create a new regular expression to match a particular string using " { $vocab-link "regexp.combinators" } " and group capture is available to extract parts of a regular expression match." $nl
+"A distinction from Perl is that " { $snippet "\\G" } ", which references the previous match, is not included. This is because that sequence is inherently stateful, and Factor regexps don't hold state." $nl
+"Additionally, none of the operations which embed code into a regexp are supported, as this would require the inclusion of the Factor parser and compiler in any application which wants to expose regexps to the user. None of the casing operations are included, for simplicity." ; ! Also describe syntax, from the beginning
+
+ARTICLE: { "regexp" "theory" } "The theory of regular expressions"
+"Far from being just a practical tool invented by Unix hackers, regular expressions were studied formally before computer programs were written to process them." $nl
+"A regular language is a set of strings that is matched by a regular expression, which is defined to have characters and the empty string, along with the operations concatenation, disjunction and Kleene star. Another way to define the class of regular languages is as the class of languages which can be recognized with constant space overhead, ie with a DFA. These two definitions are provably equivalent." $nl
+"One basic result in the theory of regular language is that the complement of a regular language is regular. In other words, for any regular expression, there exists another regular expression which matches exactly the strings that the first one doesn't match." $nl
+"This implies, by DeMorgan's law, that, if you have two regular languages, their intersection is also regular. That is, for any two regular expressions, there exists a regular expression which matches strings that match both inputs." $nl
+"Traditionally, regular expressions on computer support an additional operation: backreferences. For example, the Perl regexp " { $snippet "/(.*)$1/" } " matches a string repated twice. If a backreference refers to a string with a predetermined maximum length, then the resulting language is still regular." $nl
+"But, if not, the language is not regular. There is strong evidence that there is no efficient way to parse with backreferences in the general case. Perl uses a naive backtracking algorithm which has pathological behavior in some cases, taking exponential time to match even if backreferences aren't used. Additionally, expressions with backreferences don't have the properties with negation and intersection described above." $nl
+"The Factor regular expression engine was built with the design decision to support negation and intersection at the expense of backreferences. This lets us have a guaranteed linear-time matching algorithm. Systems like Ragel and Lex also use this algorithm, but in the Factor regular expression engine, all other features of regexps are still present." ;
+
+ARTICLE: { "regexp" "operations" } "Matching operations with regular expressions"
+{ $subsection matches? }
+{ $subsection match-slice }
+{ $subsection re-split1 }
+{ $subsection re-split }
+{ $subsection re-replace }
+{ $subsection all-matches }
+{ $subsection count-matches }
+{ $subsection re-replace } ;
+
HELP: <regexp>
{ $values { "string" string } { "regexp" regexp } }
-{ $description "Compiles a regular expression into a DFA and returns this object. Regular expressions only have to be compiled once and can then be used multiple times to match input strings." } ;
+{ $description "Creates a regular expression object, given a string in regular expression syntax. When it is first used for matching, a DFA is compiled, and this DFA is stored for reuse so it is only compiled once." } ;
+
+HELP: <optioned-regexp>
+{ $values { "string" string } { "options" string } { "regexp" regexp } }
+{ $description "Given a string in regular expression syntax, and a string of options, creates a regular expression object. When it is first used for matching, a DFA is compiled, and this DFA is stored for reuse so it is only compiled once." } ;
+
+HELP: R/
+{ $syntax "R/ foo.*|[a-zA-Z]bar/i" }
+{ $description "Literal syntax for a regular expression. When this syntax is used, the DFA is compiled at compile-time, rather than on first use." } ;
+
+HELP: regexp
+{ $class-description "The class of regular expressions. To construct these, see " { $link { "regexp" "construction" } } "." } ;
-USING: regexp tools.test kernel sequences regexp.parser
-regexp.traversal eval strings multiline ;
+USING: regexp tools.test kernel sequences regexp.parser regexp.private
+eval strings multiline accessors regexp.matchers ;
IN: regexp-tests
\ <regexp> must-infer
+\ compile-regexp must-infer
\ matches? must-infer
[ f ] [ "b" "a*" <regexp> matches? ] unit-test
! Dotall mode -- when on, . matches newlines.
! Off by default.
[ f ] [ "\n" "." <regexp> matches? ] unit-test
-[ t ] [ "\n" "(?s)." <regexp> matches? ] unit-test
+[ t ] [ "\n" "(?s:.)" <regexp> matches? ] unit-test
[ t ] [ "\n" R/ ./s matches? ] unit-test
-[ f ] [ "\n\n" "(?s).(?-s)." <regexp> matches? ] unit-test
+[ f ] [ "\n\n" "(?s:.)." <regexp> matches? ] unit-test
[ f ] [ "" ".+" <regexp> matches? ] unit-test
[ t ] [ "a" ".+" <regexp> matches? ] unit-test
[ t ] [ "bar" "foo|bar" <regexp> matches? ] unit-test
[ f ] [ "foobar" "foo|bar" <regexp> matches? ] unit-test
-/*
-! FIXME
[ f ] [ "" "(a)" <regexp> matches? ] unit-test
[ t ] [ "a" "(a)" <regexp> matches? ] unit-test
[ f ] [ "aa" "(a)" <regexp> matches? ] unit-test
[ f ] [ "aababaaabbac" "(a|b)+" <regexp> matches? ] unit-test
[ t ] [ "ababaaabba" "(a|b)+" <regexp> matches? ] unit-test
-*/
[ f ] [ "" "a{1}" <regexp> matches? ] unit-test
[ t ] [ "a" "a{1}" <regexp> matches? ] unit-test
[ f ] [ "0" "[^\\d]" <regexp> matches? ] unit-test
[ t ] [ "a" "[^\\d]" <regexp> matches? ] unit-test
-/*
-! FIXME
[ t ] [ "a" "[a-z]{1,}|[A-Z]{2,4}|b*|c|(f|g)*" <regexp> matches? ] unit-test
[ t ] [ "a" "[a-z]{1,2}|[A-Z]{3,3}|b*|c|(f|g)*" <regexp> matches? ] unit-test
[ t ] [ "a" "[a-z]{1,2}|[A-Z]{3,3}" <regexp> matches? ] unit-test
-*/
[ t ] [ "1000" "\\d{4,6}" <regexp> matches? ] unit-test
[ t ] [ "1000" "[0-9]{4,6}" <regexp> matches? ] unit-test
[ t ] [ "SXY" "\\0123XY" <regexp> matches? ] unit-test
[ t ] [ "x" "\\x78" <regexp> matches? ] unit-test
[ f ] [ "y" "\\x78" <regexp> matches? ] unit-test
-[ t ] [ "x" "\\u000078" <regexp> matches? ] unit-test
-[ f ] [ "y" "\\u000078" <regexp> matches? ] unit-test
+[ t ] [ "x" "\\u0078" <regexp> matches? ] unit-test
+[ f ] [ "y" "\\u0078" <regexp> matches? ] unit-test
[ t ] [ "ab" "a+b" <regexp> matches? ] unit-test
[ f ] [ "b" "a+b" <regexp> matches? ] unit-test
[ f ] [ "aaaxb" "a+ab" <regexp> matches? ] unit-test
[ t ] [ "aaacb" "a+cb" <regexp> matches? ] unit-test
-[ 3 ] [ "aaacb" "a*" <regexp> match-head ] unit-test
-[ 2 ] [ "aaacb" "aa?" <regexp> match-head ] unit-test
+[ 3 ] [ "aaacb" "a*" <regexp> match-index-head ] unit-test
+[ 2 ] [ "aaacb" "aa?" <regexp> match-index-head ] unit-test
[ t ] [ "aaa" R/ AAA/i matches? ] unit-test
[ f ] [ "aax" R/ AAA/i matches? ] unit-test
[ t ] [ "c" R/ [A-Z]/i matches? ] unit-test
[ f ] [ "3" R/ [A-Z]/i matches? ] unit-test
-[ t ] [ "a" "(?i)a" <regexp> matches? ] unit-test
-[ t ] [ "a" "(?i)a" <regexp> matches? ] unit-test
-[ t ] [ "A" "(?i)a" <regexp> matches? ] unit-test
-[ t ] [ "A" "(?i)a" <regexp> matches? ] unit-test
+[ t ] [ "a" "(?i:a)" <regexp> matches? ] unit-test
+[ t ] [ "a" "(?i:a)" <regexp> matches? ] unit-test
+[ t ] [ "A" "(?i:a)" <regexp> matches? ] unit-test
+[ t ] [ "A" "(?i:a)" <regexp> matches? ] unit-test
-[ t ] [ "a" R/ (?-i)a/i matches? ] unit-test
-[ t ] [ "a" R/ (?-i)a/i matches? ] unit-test
-[ f ] [ "A" R/ (?-i)a/i matches? ] unit-test
-[ f ] [ "A" R/ (?-i)a/i matches? ] unit-test
+[ t ] [ "a" R/ (?-i:a)/i matches? ] unit-test
+[ t ] [ "a" R/ (?-i:a)/i matches? ] unit-test
+[ f ] [ "A" R/ (?-i:a)/i matches? ] unit-test
+[ f ] [ "A" R/ (?-i:a)/i matches? ] unit-test
[ f ] [ "A" "[a-z]" <regexp> matches? ] unit-test
[ t ] [ "A" R/ [a-z]/i matches? ] unit-test
[ f ] [ "A" "\\p{Lower}" <regexp> matches? ] unit-test
[ t ] [ "A" R/ \p{Lower}/i matches? ] unit-test
-[ t ] [ "abc" <reversed> R/ abc/r matches? ] unit-test
-[ t ] [ "abc" <reversed> R/ a[bB][cC]/r matches? ] unit-test
-! [ t ] [ "adcbe" R/ a(?r)(bcd)(?-r)e/ matches? ] unit-test ! FIXME
+[ t ] [ "abc" reverse R/ abc/r matches? ] unit-test
+[ t ] [ "abc" reverse R/ a[bB][cC]/r matches? ] unit-test
+
+[ t ] [ 3 "xabc" R/ abc/ <reverse-matcher> match-index-from >boolean ] unit-test
+[ t ] [ 3 "xabc" R/ a[bB][cC]/ <reverse-matcher> match-index-from >boolean ] unit-test
[ t ] [ "s@f" "[a-z.-]@[a-z]" <regexp> matches? ] unit-test
[ f ] [ "a" "[a-z.-]@[a-z]" <regexp> matches? ] unit-test
[ t ] [ "abc*" "[^\\*]*\\*" <regexp> matches? ] unit-test
[ t ] [ "bca" "[^a]*a" <regexp> matches? ] unit-test
-/*
-! FIXME
[ ] [
"(0[lL]?|[1-9]\\d{0,9}(\\d{0,9}[lL])?|0[xX]\\p{XDigit}{1,8}(\\p{XDigit}{0,8}[lL])?|0[0-7]{1,11}([0-7]{0,11}[lL])?|([0-9]+\\.[0-9]*|\\.[0-9]+)([eE][+-]?[0-9]+)?[fFdD]?|[0-9]+([eE][+-]?[0-9]+[fFdD]?|([eE][+-]?[0-9]+)?[fFdD]))"
<regexp> drop
[ ] [ "USING: regexp kernel ; R' \\*[^\s*][^*]*\\*' drop" eval ] unit-test
-[ "ab" ] [ "ab" "(a|ab)(bc)?" <regexp> first-match >string ] unit-test
-[ "abc" ] [ "abc" "(a|ab)(bc)?" <regexp> first-match >string ] unit-test
-
-[ "ab" ] [ "ab" "(ab|a)(bc)?" <regexp> first-match >string ] unit-test
-[ "abc" ] [ "abc" "(ab|a)(bc)?" <regexp> first-match >string ] unit-test
-
-[ "b" ] [ "aaaaaaaaaaaaaaaaaaaaaaab" "((a*)*b)*b" <regexp> first-match >string ] unit-test
-*/
+[ "ab" ] [ "ab" "(a|ab)(bc)?" <regexp> match-head >string ] unit-test
+[ "abc" ] [ "abc" "(a|ab)(bc)?" <regexp> match-head >string ] unit-test
-! [ t ] [ "a:b" ".+:?" <regexp> matches? ] unit-test
+[ "ab" ] [ "ab" "(ab|a)(bc)?" <regexp> match-head >string ] unit-test
+[ "abc" ] [ "abc" "(ab|a)(bc)?" <regexp> match-head >string ] unit-test
-! [ 1 ] [ "hello" ".+?" <regexp> match length ] unit-test
+[ "b" ] [ "aaaaaaaaaaaaaaaaaaaaaaab" "((a*)*b)*b" <regexp> match-head >string ] unit-test
[ { "1" "2" "3" "4" } ]
[ "1ABC2DEF3GHI4" R/ [A-Z]+/ re-split [ >string ] map ] unit-test
[ "-- title --" ] [ "== title ==" R/ =/ "-" re-replace ] unit-test
-/*
-! FIXME
-[ f ] [ "ab" "a(?!b)" <regexp> first-match ] unit-test
-[ "a" ] [ "ac" "a(?!b)" <regexp> first-match >string ] unit-test
+[ f ] [ "ab" "a(?!b)" <regexp> match-head ] unit-test
+[ "a" ] [ "ac" "a(?!b)" <regexp> match-head >string ] unit-test
[ t ] [ "fxxbar" "(?!foo).{3}bar" <regexp> matches? ] unit-test
[ f ] [ "foobar" "(?!foo).{3}bar" <regexp> matches? ] unit-test
-[ "a" ] [ "ab" "a(?=b)(?=b)" <regexp> first-match >string ] unit-test
-[ "a" ] [ "ba" "a(?<=b)(?<=b)" <regexp> first-match >string ] unit-test
-[ "a" ] [ "cab" "a(?=b)(?<=c)" <regexp> first-match >string ] unit-test
+[ "a" ] [ "ab" "a(?=b)(?=b)" <regexp> match-head >string ] unit-test
+[ "a" ] [ "ba" "(?<=b)(?<=b)a" <regexp> match-head >string ] unit-test
+[ "a" ] [ "cab" "(?<=c)a(?=b)" <regexp> match-head >string ] unit-test
-[ 3 ] [ "foobar" "foo(?=bar)" <regexp> match-head ] unit-test
-[ f ] [ "foobxr" "foo(?=bar)" <regexp> match-head ] unit-test
-*/
+[ 3 ] [ "foobar" "foo(?=bar)" <regexp> match-index-head ] unit-test
+[ f ] [ "foobxr" "foo(?=bar)" <regexp> match-index-head ] unit-test
! Bug in parsing word
[ t ] [ "a" R' a' matches? ] unit-test
-! Convert to lowercase until E
-[ f ] [ "AA" R/ \LAA\E/ matches? ] unit-test
-[ t ] [ "aa" R/ \LAA\E/ matches? ] unit-test
-
-! Convert to uppercase until E
-[ t ] [ "AA" R/ \Uaa\E/ matches? ] unit-test
-[ f ] [ "aa" R/ \Uaa\E/ matches? ] unit-test
-
-! [ "{Lower}" <regexp> ] [ invalid-range? ] must-fail-with
-
-! [ t ] [ "a" R/ ^a/ matches? ] unit-test
-! [ f ] [ "\na" R/ ^a/ matches? ] unit-test
-! [ f ] [ "\r\na" R/ ^a/ matches? ] unit-test
-! [ f ] [ "\ra" R/ ^a/ matches? ] unit-test
-
-! [ t ] [ "a" R/ a$/ matches? ] unit-test
-! [ f ] [ "a\n" R/ a$/ matches? ] unit-test
-! [ f ] [ "a\r" R/ a$/ matches? ] unit-test
-! [ f ] [ "a\r\n" R/ a$/ matches? ] unit-test
-
-! [ t ] [ "a" R/ a$|b$/ matches? ] unit-test
-! [ t ] [ "b" R/ a$|b$/ matches? ] unit-test
-! [ t ] [ "ab" R/ a$|b$/ matches? ] unit-test
-! [ t ] [ "ba" R/ ba$|b$/ matches? ] unit-test
-
-! [ t ] [ "a" R/ \Aa/ matches? ] unit-test
-! [ f ] [ "\na" R/ \Aaa/ matches? ] unit-test
-! [ f ] [ "\r\na" R/ \Aa/ matches? ] unit-test
-! [ f ] [ "\ra" R/ \Aa/ matches? ] unit-test
-
-! [ t ] [ "a" R/ \Aa/m matches? ] unit-test
-! [ f ] [ "\na" R/ \Aaa/m matches? ] unit-test
-! [ f ] [ "\r\na" R/ \Aa/m matches? ] unit-test
-! [ f ] [ "\ra" R/ \Aa/m matches? ] unit-test
-
-! [ t ] [ "\r\n\n\n\nam" R/ ^am/m matches? ] unit-test
-
-! [ t ] [ "a" R/ \Aa\z/m matches? ] unit-test
-! [ f ] [ "a\n" R/ \Aa\z/m matches? ] unit-test
-
-! [ t ] [ "a\r\n" R/ \Aa\Z/m matches? ] unit-test
-! [ t ] [ "a\n" R/ \Aa\Z/m matches? ] unit-test
-
-! [ t ] [ "a" R/ \Aa\Z/m matches? ] unit-test
-! [ f ] [ "\na" R/ \Aaa\Z/m matches? ] unit-test
-! [ f ] [ "\r\na" R/ \Aa\Z/m matches? ] unit-test
-! [ f ] [ "\ra" R/ \Aa\Z/m matches? ] unit-test
-
-! [ t ] [ "a" R/ ^a/m matches? ] unit-test
-! [ t ] [ "\na" R/ ^a/m matches? ] unit-test
-! [ t ] [ "\r\na" R/ ^a/m matches? ] unit-test
-! [ t ] [ "\ra" R/ ^a/m matches? ] unit-test
-
-! [ t ] [ "a" "a$" R/ a$/m matches? ] unit-test
-! [ t ] [ "a\n" "a$" R/ a$/m matches? ] unit-test
-! [ t ] [ "a\r" "a$" R/ a$/m matches? ] unit-test
-! [ t ] [ "a\r\n" "a$" R/ a$/m matches? ] unit-test
-
-! [ f ] [ "foobxr" "foo\\z" <regexp> match-head ] unit-test
-! [ 3 ] [ "foo" "foo\\z" <regexp> match-head ] unit-test
+! Testing negation
+[ f ] [ "a" R/ (?~a)/ matches? ] unit-test
+[ t ] [ "aa" R/ (?~a)/ matches? ] unit-test
+[ t ] [ "bb" R/ (?~a)/ matches? ] unit-test
+[ t ] [ "" R/ (?~a)/ matches? ] unit-test
+
+[ f ] [ "a" R/ (?~a+|b)/ matches? ] unit-test
+[ f ] [ "aa" R/ (?~a+|b)/ matches? ] unit-test
+[ t ] [ "bb" R/ (?~a+|b)/ matches? ] unit-test
+[ f ] [ "b" R/ (?~a+|b)/ matches? ] unit-test
+[ t ] [ "" R/ (?~a+|b)/ matches? ] unit-test
+
+! Intersecting classes
+[ t ] [ "ab" R/ ac|\p{Lower}b/ matches? ] unit-test
+[ t ] [ "ab" R/ ac|[a-z]b/ matches? ] unit-test
+[ t ] [ "ac" R/ ac|\p{Lower}b/ matches? ] unit-test
+[ t ] [ "ac" R/ ac|[a-z]b/ matches? ] unit-test
+[ t ] [ "ac" R/ [a-zA-Z]c|\p{Lower}b/ matches? ] unit-test
+[ t ] [ "ab" R/ [a-zA-Z]c|\p{Lower}b/ matches? ] unit-test
+[ t ] [ "Ï€b" R/ [a-zA-Z]c|\p{Lower}b/ matches? ] unit-test
+[ f ] [ "Ï€c" R/ [a-zA-Z]c|\p{Lower}b/ matches? ] unit-test
+[ f ] [ "Ab" R/ [a-zA-Z]c|\p{Lower}b/ matches? ] unit-test
+
+[ t ] [ "aaaa" R/ .*a./ matches? ] unit-test
+
+! DFA is compiled when needed, or when literal
+[ f ] [ "foo" <regexp> dfa>> >boolean ] unit-test
+[ t ] [ R/ foo/ dfa>> >boolean ] unit-test
+
+[ t ] [ "a" R/ ^a/ matches? ] unit-test
+[ f ] [ "\na" R/ ^a/ matches? ] unit-test
+[ f ] [ "\r\na" R/ ^a/ matches? ] unit-test
+[ f ] [ "\ra" R/ ^a/ matches? ] unit-test
+
+[ 1 ] [ "a" R/ ^a/ count-matches ] unit-test
+[ 0 ] [ "\na" R/ ^a/ count-matches ] unit-test
+[ 0 ] [ "\r\na" R/ ^a/ count-matches ] unit-test
+[ 0 ] [ "\ra" R/ ^a/ count-matches ] unit-test
+
+[ t ] [ "a" R/ a$/ matches? ] unit-test
+[ f ] [ "a\n" R/ a$/ matches? ] unit-test
+[ f ] [ "a\r" R/ a$/ matches? ] unit-test
+[ f ] [ "a\r\n" R/ a$/ matches? ] unit-test
+
+[ 1 ] [ "a" R/ a$/ count-matches ] unit-test
+[ 0 ] [ "a\n" R/ a$/ count-matches ] unit-test
+[ 0 ] [ "a\r" R/ a$/ count-matches ] unit-test
+[ 0 ] [ "a\r\n" R/ a$/ count-matches ] unit-test
+
+[ t ] [ "a" R/ a$|b$/ matches? ] unit-test
+[ t ] [ "b" R/ a$|b$/ matches? ] unit-test
+[ f ] [ "ab" R/ a$|b$/ matches? ] unit-test
+[ t ] [ "ba" R/ ba$|b$/ matches? ] unit-test
+
+[ t ] [ "a" R/ \Aa/ matches? ] unit-test
+[ f ] [ "\na" R/ \Aaa/ matches? ] unit-test
+[ f ] [ "\r\na" R/ \Aa/ matches? ] unit-test
+[ f ] [ "\ra" R/ \Aa/ matches? ] unit-test
+
+[ t ] [ "a" R/ \Aa/m matches? ] unit-test
+[ f ] [ "\na" R/ \Aaa/m matches? ] unit-test
+[ f ] [ "\r\na" R/ \Aa/m matches? ] unit-test
+[ f ] [ "\ra" R/ \Aa/m matches? ] unit-test
+[ 0 ] [ "\ra" R/ \Aa/m count-matches ] unit-test
+
+[ f ] [ "\r\n\n\n\nam" R/ ^am/m matches? ] unit-test
+[ 1 ] [ "\r\n\n\n\nam" R/ ^am/m count-matches ] unit-test
+
+[ t ] [ "a" R/ \Aa\z/m matches? ] unit-test
+[ f ] [ "a\n" R/ \Aa\z/m matches? ] unit-test
+
+[ t ] [ "a\r\n" R/ \Aa\Z/m matches? ] unit-test
+[ t ] [ "a\n" R/ \Aa\Z/m matches? ] unit-test
+
+[ t ] [ "a" R/ \Aa\Z/m matches? ] unit-test
+[ f ] [ "\na" R/ \Aaa\Z/m matches? ] unit-test
+[ f ] [ "\r\na" R/ \Aa\Z/m matches? ] unit-test
+[ f ] [ "\ra" R/ \Aa\Z/m matches? ] unit-test
+
+[ t ] [ "a" R/ ^a/m matches? ] unit-test
+[ f ] [ "\na" R/ ^a/m matches? ] unit-test
+[ 1 ] [ "\na" R/ ^a/m count-matches ] unit-test
+[ 1 ] [ "\r\na" R/ ^a/m count-matches ] unit-test
+[ 1 ] [ "\ra" R/ ^a/m count-matches ] unit-test
+
+[ t ] [ "a" R/ a$/m matches? ] unit-test
+[ f ] [ "a\n" R/ a$/m matches? ] unit-test
+[ 1 ] [ "a\n" R/ a$/m count-matches ] unit-test
+[ 1 ] [ "a\r" R/ a$/m count-matches ] unit-test
+[ 1 ] [ "a\r\n" R/ a$/m count-matches ] unit-test
+
+[ f ] [ "foobxr" "foo\\z" <regexp> match-index-head ] unit-test
+[ 3 ] [ "foo" "foo\\z" <regexp> match-index-head ] unit-test
! [ t ] [ "foo" "\\bfoo\\b" <regexp> matches? ] unit-test
! [ t ] [ "afoob" "\\Bfoo\\B" <regexp> matches? ] unit-test
! [ t ] [ "afoob" "\\bfoo\\b" <regexp> matches? ] unit-test
! [ f ] [ "foo" "\\Bfoo\\B" <regexp> matches? ] unit-test
-! [ 3 ] [ "foo bar" "foo\\b" <regexp> match-head ] unit-test
+! [ 3 ] [ "foo bar" "foo\\b" <regexp> match-index-head ] unit-test
! [ f ] [ "fooxbar" "foo\\b" <regexp> matches? ] unit-test
! [ t ] [ "foo" "foo\\b" <regexp> matches? ] unit-test
! [ t ] [ "foo bar" "foo\\b bar" <regexp> matches? ] unit-test
! [ f ] [ "foo" "foo\\bbar" <regexp> matches? ] unit-test
! [ f ] [ "foo bar" "foo\\B" <regexp> matches? ] unit-test
-! [ 3 ] [ "fooxbar" "foo\\B" <regexp> match-head ] unit-test
+! [ 3 ] [ "fooxbar" "foo\\B" <regexp> match-index-head ] unit-test
! [ t ] [ "foo" "foo\\B" <regexp> matches? ] unit-test
! [ f ] [ "foo bar" "foo\\B bar" <regexp> matches? ] unit-test
! [ t ] [ "fooxbar" "foo\\Bxbar" <regexp> matches? ] unit-test
! [ f ] [ "foo" "foo\\Bbar" <regexp> matches? ] unit-test
-! [ 1 ] [ "aaacb" "a+?" <regexp> match-head ] unit-test
-! [ 1 ] [ "aaacb" "aa??" <regexp> match-head ] unit-test
+! [ 1 ] [ "aaacb" "a+?" <regexp> match-index-head ] unit-test
+! [ 1 ] [ "aaacb" "aa??" <regexp> match-index-head ] unit-test
! [ f ] [ "aaaab" "a++ab" <regexp> matches? ] unit-test
! [ t ] [ "aaacb" "a++cb" <regexp> matches? ] unit-test
-! [ 3 ] [ "aacb" "aa?c" <regexp> match-head ] unit-test
-! [ 3 ] [ "aacb" "aa??c" <regexp> match-head ] unit-test
+! [ 3 ] [ "aacb" "aa?c" <regexp> match-index-head ] unit-test
+! [ 3 ] [ "aacb" "aa??c" <regexp> match-index-head ] unit-test
! "ab" "a(?=b*)" <regexp> match
! "abbbbbc" "a(?=b*c)" <regexp> match
-! Copyright (C) 2008 Doug Coleman.
+! Copyright (C) 2008, 2009 Doug Coleman, Daniel Ehrenberg.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors combinators kernel math sequences strings sets
assocs prettyprint.backend prettyprint.custom make lexer
-namespaces parser arrays fry regexp.backend regexp.utils
-regexp.parser regexp.nfa regexp.dfa regexp.traversal
-regexp.transition-tables splitting sorting ;
+namespaces parser arrays fry locals regexp.minimize
+regexp.parser regexp.nfa regexp.dfa regexp.classes
+regexp.transition-tables splitting sorting regexp.ast
+regexp.negation regexp.matchers regexp.compiler ;
IN: regexp
-: default-regexp ( string -- regexp )
- regexp new
- swap >>raw
- <transition-table> >>nfa-table
- <transition-table> >>dfa-table
- <transition-table> >>minimized-table
- H{ } clone >>nfa-traversal-flags
- H{ } clone >>dfa-traversal-flags
- H{ } clone >>options
- H{ } clone >>matchers
- reset-regexp ;
-
-: construct-regexp ( regexp -- regexp' )
- {
- [ parse-regexp ]
- [ construct-nfa ]
- [ construct-dfa ]
- [ ]
- } cleave ;
-
-: (match) ( string regexp -- dfa-traverser )
- <dfa-traverser> do-match ; inline
+TUPLE: regexp
+ { raw read-only }
+ { parse-tree read-only }
+ { options read-only }
+ dfa reverse-dfa ;
-: match ( string regexp -- slice/f )
- (match) return-match ;
+: make-regexp ( string ast -- regexp )
+ f f <options> f f regexp boa ; foldable
+ ! Foldable because, when the dfa slot is set,
+ ! it'll be set to the same thing regardless of who sets it
-: match* ( string regexp -- slice/f captured-groups )
- (match) [ return-match ] [ captured-groups>> ] bi ;
+: <optioned-regexp> ( string options -- regexp )
+ [ dup parse-regexp ] [ string>options ] bi*
+ f f regexp boa ;
-: matches? ( string regexp -- ? )
- dupd match
- [ [ length ] bi@ = ] [ drop f ] if* ;
-
-: match-head ( string regexp -- end/f ) match [ length ] [ f ] if* ;
+: <regexp> ( string -- regexp ) "" <optioned-regexp> ;
-: match-at ( string m regexp -- n/f finished? )
- [
- 2dup swap length > [ 2drop f f ] [ tail-slice t ] if
- ] dip swap [ match-head f ] [ 2drop f t ] if ;
+TUPLE: reverse-matcher regexp ;
+C: <reverse-matcher> reverse-matcher
+! Reverse matchers won't work properly with most combinators, for now
-: match-range ( string m regexp -- a/f b/f )
- 3dup match-at over [
- drop nip rot drop dupd +
- ] [
- [ 3drop drop f f ] [ drop [ 1+ ] dip match-range ] if
- ] if ;
+<PRIVATE
-: first-match ( string regexp -- slice/f )
- dupd 0 swap match-range rot over [ <slice> ] [ 3drop f ] if ;
+: get-ast ( regexp -- ast )
+ [ parse-tree>> ] [ options>> ] bi <with-options> ;
-: re-cut ( string regexp -- end/f start )
- dupd first-match
- [ split1-slice swap ] [ "" like f swap ] if* ;
+: compile-regexp ( regexp -- regexp )
+ dup '[ [ _ get-ast ast>dfa dfa>quotation ] unless* ] change-dfa ;
-: (re-split) ( string regexp -- )
- over [ [ re-cut , ] keep (re-split) ] [ 2drop ] if ;
+: <reversed-option> ( ast -- reversed )
+ "r" string>options <with-options> ;
-: re-split ( string regexp -- seq )
- [ (re-split) ] { } make ;
+M: lookahead question>quot ! Returns ( index string -- ? )
+ term>> ast>dfa dfa>shortest-quotation ;
-: re-replace ( string regexp replacement -- result )
- [ re-split ] dip join ;
+M: lookbehind question>quot ! Returns ( index string -- ? )
+ term>> <reversed-option>
+ ast>dfa dfa>reverse-shortest-quotation
+ [ [ 1- ] dip ] prepose ;
-: next-match ( string regexp -- end/f match/f )
- dupd first-match dup
- [ [ split1-slice nip ] keep ] [ 2drop f f ] if ;
+: compile-reverse ( regexp -- regexp )
+ dup '[
+ [
+ _ get-ast <reversed-option>
+ ast>dfa dfa>reverse-quotation
+ ] unless*
+ ] change-reverse-dfa ;
-: all-matches ( string regexp -- seq )
- [ dup ] swap '[ _ next-match ] produce nip harvest ;
+M: regexp match-index-from
+ compile-regexp dfa>> <quot-matcher> match-index-from ;
-: count-matches ( string regexp -- n )
- all-matches length ;
+M: reverse-matcher match-index-from
+ regexp>> compile-reverse reverse-dfa>>
+ <quot-matcher> match-index-from ;
-<PRIVATE
+! The following two should do some caching
: find-regexp-syntax ( string -- prefix suffix )
{
{ "R| " "|" }
} swap [ subseq? not nip ] curry assoc-find drop ;
-: string>options ( string -- options )
- [ ch>option dup ] H{ } map>assoc ;
+: take-until ( end lexer -- string )
+ dup skip-blank [
+ [ index-from ] 2keep
+ [ swapd subseq ]
+ [ 2drop 1+ ] 3bi
+ ] change-lexer-column ;
-: options>string ( options -- string )
- keys [ option>ch ] map natural-sort >string ;
-
-PRIVATE>
-
-: <optioned-regexp> ( string option-string -- regexp )
- [ default-regexp ] [ string>options ] bi* >>options
- construct-regexp ;
-
-: <regexp> ( string -- regexp ) "" <optioned-regexp> ;
-
-<PRIVATE
+: parse-noblank-token ( lexer -- str/f )
+ dup still-parsing-line? [ (parse-token) ] [ drop f ] if ;
: parsing-regexp ( accum end -- accum )
- lexer get dup skip-blank
- [ [ index-from dup 1+ swap ] 2keep swapd subseq swap ] change-lexer-column
- lexer get dup still-parsing-line?
- [ (parse-token) ] [ drop f ] if
- <optioned-regexp> parsed ;
+ lexer get [ take-until ] [ parse-noblank-token ] bi
+ <optioned-regexp> compile-regexp parsed ;
PRIVATE>
! Copyright (C) 2008 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors arrays assocs fry hashtables kernel sequences
-vectors regexp.utils ;
+vectors locals regexp.classes ;
IN: regexp.transition-tables
-TUPLE: transition from to obj ;
-TUPLE: literal-transition < transition ;
-TUPLE: class-transition < transition ;
-TUPLE: default-transition < transition ;
-
-TUPLE: literal obj ;
-TUPLE: class obj ;
-TUPLE: default ;
-: make-transition ( from to obj class -- obj )
- new
- swap >>obj
- swap >>to
- swap >>from ;
-
-: <literal-transition> ( from to obj -- transition )
- literal-transition make-transition ;
-
-: <class-transition> ( from to obj -- transition )
- class-transition make-transition ;
-
-: <default-transition> ( from to -- transition )
- t default-transition make-transition ;
-
TUPLE: transition-table transitions start-state final-states ;
: <transition-table> ( -- transition-table )
H{ } clone >>final-states ;
: maybe-initialize-key ( key hashtable -- )
+ ! Why do we have to do this?
2dup key? [ 2drop ] [ [ H{ } clone ] 2dip set-at ] if ;
-: set-transition ( transition hash -- )
- #! set the state as a key
- 2dup [ to>> ] dip maybe-initialize-key
- [ [ to>> ] [ obj>> ] [ from>> ] tri ] dip
- 2dup at* [ 2nip insert-at ]
- [ drop [ H{ } clone [ insert-at ] keep ] 2dip set-at ] if ;
-
-: add-transition ( transition transition-table -- )
- transitions>> set-transition ;
+:: (set-transition) ( from to obj hash -- )
+ to condition? [ to hash maybe-initialize-key ] unless
+ from hash at
+ [ [ to obj ] dip set-at ]
+ [ to obj associate from hash set-at ] if* ;
+
+: set-transition ( from to obj transition-table -- )
+ transitions>> (set-transition) ;
+
+:: (add-transition) ( from to obj hash -- )
+ to hash maybe-initialize-key
+ from hash at
+ [ [ to obj ] dip push-at ]
+ [ to 1vector obj associate from hash set-at ] if* ;
+
+: add-transition ( from to obj transition-table -- )
+ transitions>> (add-transition) ;
+
+: map-set ( assoc quot -- new-assoc )
+ '[ drop @ dup ] assoc-map ; inline
+
+: rewrite-transitions ( transition-table assoc quot -- transition-table )
+ [
+ [ clone ] dip
+ [ '[ _ condition-at ] change-start-state ]
+ [ '[ [ _ at ] map-set ] change-final-states ]
+ [ ] tri
+ ] dip '[ _ @ ] change-transitions ; inline
+
+: number-transitions ( transitions numbering -- new-transitions )
+ dup '[
+ [ _ at ]
+ [ [ _ condition-at ] assoc-map ] bi*
+ ] assoc-map ;
+
+: transitions-at ( transitions numbering -- transitions )
+ [ number-transitions ] rewrite-transitions ;
! Copyright (C) 2008 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors assocs combinators kernel math
-quotations sequences regexp.parser regexp.classes fry arrays
-combinators.short-circuit regexp.utils prettyprint regexp.nfa ;
+quotations sequences regexp.classes fry arrays regexp.matchers
+combinators.short-circuit prettyprint regexp.nfa ;
IN: regexp.traversal
TUPLE: dfa-traverser
dfa-table
- traversal-flags
- traverse-forward
- lookahead-counters
- lookbehind-counters
- capture-counters
- captured-groups
- capture-group-index
- last-state current-state
+ current-state
text
- match-failed?
- start-index current-index
- matches ;
+ current-index
+ match-index ;
-: <dfa-traverser> ( text regexp -- match )
- [ dfa-table>> ] [ dfa-traversal-flags>> ] bi
+: <dfa-traverser> ( start-index text dfa -- match )
dfa-traverser new
- swap >>traversal-flags
swap [ start-state>> >>current-state ] [ >>dfa-table ] bi
swap >>text
- t >>traverse-forward
- 0 >>start-index
- 0 >>current-index
- 0 >>capture-group-index
- V{ } clone >>matches
- V{ } clone >>capture-counters
- V{ } clone >>lookbehind-counters
- V{ } clone >>lookahead-counters
- H{ } clone >>captured-groups ;
+ swap >>current-index ;
: final-state? ( dfa-traverser -- ? )
[ current-state>> ]
[ dfa-table>> final-states>> ] bi key? ;
-: beginning-of-text? ( dfa-traverser -- ? )
- current-index>> 0 <= ; inline
-
: end-of-text? ( dfa-traverser -- ? )
[ current-index>> ] [ text>> length ] bi >= ; inline
: text-finished? ( dfa-traverser -- ? )
{
- [ current-state>> empty? ]
+ [ current-state>> not ]
[ end-of-text? ]
- [ match-failed?>> ]
} 1|| ;
-: save-final-state ( dfa-straverser -- )
- [ current-index>> ] [ matches>> ] bi push ;
+: save-final-state ( dfa-traverser -- dfa-traverser )
+ dup current-index>> >>match-index ;
: match-done? ( dfa-traverser -- ? )
- dup final-state? [
- dup save-final-state
- ] when text-finished? ;
-
-: previous-text-character ( dfa-traverser -- ch )
- [ text>> ] [ current-index>> 1- ] bi nth ;
-
-: current-text-character ( dfa-traverser -- ch )
- [ text>> ] [ current-index>> ] bi nth ;
-
-: next-text-character ( dfa-traverser -- ch )
- [ text>> ] [ current-index>> 1+ ] bi nth ;
-
-GENERIC: flag-action ( dfa-traverser flag -- )
-
-
-M: beginning-of-input flag-action ( dfa-traverser flag -- )
- drop
- dup beginning-of-text? [ t >>match-failed? ] unless drop ;
-
-M: end-of-input flag-action ( dfa-traverser flag -- )
- drop
- dup end-of-text? [ t >>match-failed? ] unless drop ;
-
-
-M: beginning-of-line flag-action ( dfa-traverser flag -- )
- drop
- dup {
- [ beginning-of-text? ]
- [ previous-text-character terminator-class class-member? ]
- } 1|| [ t >>match-failed? ] unless drop ;
-
-M: end-of-line flag-action ( dfa-traverser flag -- )
- drop
- dup {
- [ end-of-text? ]
- [ next-text-character terminator-class class-member? ]
- } 1|| [ t >>match-failed? ] unless drop ;
-
-
-M: word-boundary flag-action ( dfa-traverser flag -- )
- drop
- dup {
- [ end-of-text? ]
- [ current-text-character terminator-class class-member? ]
- } 1|| [ t >>match-failed? ] unless drop ;
-
-
-M: lookahead-on flag-action ( dfa-traverser flag -- )
- drop
- lookahead-counters>> 0 swap push ;
-
-M: lookahead-off flag-action ( dfa-traverser flag -- )
- drop
- dup lookahead-counters>>
- [ drop ] [ pop '[ _ - ] change-current-index drop ] if-empty ;
-
-M: lookbehind-on flag-action ( dfa-traverser flag -- )
- drop
- f >>traverse-forward
- [ 2 - ] change-current-index
- lookbehind-counters>> 0 swap push ;
-
-M: lookbehind-off flag-action ( dfa-traverser flag -- )
- drop
- t >>traverse-forward
- dup lookbehind-counters>>
- [ drop ] [ pop '[ _ + 2 + ] change-current-index drop ] if-empty ;
-
-M: capture-group-on flag-action ( dfa-traverser flag -- )
- drop
- [ current-index>> 0 2array ]
- [ capture-counters>> ] bi push ;
-
-M: capture-group-off flag-action ( dfa-traverser flag -- )
- drop
- dup capture-counters>> empty? [
- drop
- ] [
- {
- [ capture-counters>> pop first2 dupd + ]
- [ text>> <slice> ]
- [ [ 1+ ] change-capture-group-index capture-group-index>> ]
- [ captured-groups>> set-at ]
- } cleave
- ] if ;
-
-: process-flags ( dfa-traverser -- )
- [ [ 1+ ] map ] change-lookahead-counters
- [ [ 1+ ] map ] change-lookbehind-counters
- [ [ first2 1+ 2array ] map ] change-capture-counters
- ! dup current-state>> .
- dup [ current-state>> ] [ traversal-flags>> ] bi
- at [ flag-action ] with each ;
+ dup final-state? [ save-final-state ] when text-finished? ;
: increment-state ( dfa-traverser state -- dfa-traverser )
- [
- dup traverse-forward>>
- [ [ 1+ ] change-current-index ]
- [ [ 1- ] change-current-index ] if
- dup current-state>> >>last-state
- ] [ first ] bi* >>current-state ;
+ >>current-state
+ [ 1 + ] change-current-index ;
: match-literal ( transition from-state table -- to-state/f )
transitions>> at at ;
: match-class ( transition from-state table -- to-state/f )
transitions>> at* [
- [ drop class-member? ] assoc-with assoc-find [ nip ] [ drop ] if
+ swap '[ drop _ swap class-member? ] assoc-find spin ?
] [ drop ] if ;
-: match-default ( transition from-state table -- to-state/f )
- [ drop ] 2dip transitions>> at t swap at ;
-
: match-transition ( obj from-state dfa -- to-state/f )
- { [ match-literal ] [ match-class ] [ match-default ] } 3|| ;
+ { [ match-literal ] [ match-class ] } 3|| ;
: setup-match ( match -- obj state dfa-table )
[ [ current-index>> ] [ text>> ] bi nth ]
[ dfa-table>> ] tri ;
: do-match ( dfa-traverser -- dfa-traverser )
- dup process-flags
dup match-done? [
dup setup-match match-transition
[ increment-state do-match ] when*
] unless ;
-: return-match ( dfa-traverser -- slice/f )
- dup matches>>
- [ drop f ]
- [
- [ [ text>> ] [ start-index>> ] bi ]
- [ peek ] bi* rot <slice>
- ] if-empty ;
+TUPLE: dfa-matcher dfa ;
+C: <dfa-matcher> dfa-matcher
+M: dfa-matcher match-index-from
+ dfa>> <dfa-traverser> do-match match-index>> ;
+++ /dev/null
-USING: regexp.utils tools.test ;
-IN: regexp.utils.tests
-
-[ [ ] [ ] while-changes ] must-infer
+++ /dev/null
-! Copyright (C) 2008 Doug Coleman.
-! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs io kernel math math.order
-namespaces regexp.backend sequences unicode.categories
-math.ranges fry combinators.short-circuit vectors ;
-IN: regexp.utils
-
-: (while-changes) ( obj quot: ( obj -- obj' ) pred: ( obj -- <=> ) pred-ret -- obj )
- [ [ dup slip ] dip pick over call ] dip dupd =
- [ 3drop ] [ (while-changes) ] if ; inline recursive
-
-: while-changes ( obj quot pred -- obj' )
- pick over call (while-changes) ; inline
-
-: assoc-with ( param assoc quot -- assoc curry )
- swapd [ [ -rot ] dip call ] 2curry ; inline
-
-: insert-at ( value key hash -- )
- 2dup at* [
- 2nip push
- ] [
- drop
- [ dup vector? [ 1vector ] unless ] 2dip set-at
- ] if ;
-
-: ?insert-at ( value key hash/f -- hash )
- [ H{ } clone ] unless* [ insert-at ] keep ;
-
-ERROR: bad-octal number ;
-ERROR: bad-hex number ;
-: check-octal ( octal -- octal ) dup 255 > [ bad-octal ] when ;
-: check-hex ( hex -- hex ) dup number? [ bad-hex ] unless ;
-
-: ascii? ( n -- ? ) 0 HEX: 7f between? ;
-: octal-digit? ( n -- ? ) CHAR: 0 CHAR: 7 between? ;
-: decimal-digit? ( n -- ? ) CHAR: 0 CHAR: 9 between? ;
-
-: hex-digit? ( n -- ? )
- [
- [ decimal-digit? ]
- [ CHAR: a CHAR: f between? ]
- [ CHAR: A CHAR: F between? ]
- ] 1|| ;
-
-: control-char? ( n -- ? )
- [
- [ 0 HEX: 1f between? ]
- [ HEX: 7f = ]
- ] 1|| ;
-
-: punct? ( n -- ? )
- "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" member? ;
-
-: c-identifier-char? ( ch -- ? )
- [ [ alpha? ] [ CHAR: _ = ] ] 1|| ;
-
-: java-blank? ( n -- ? )
- {
- CHAR: \s CHAR: \t CHAR: \n
- HEX: b HEX: 7 CHAR: \r
- } member? ;
-
-: java-printable? ( n -- ? )
- [ [ alpha? ] [ punct? ] ] 1|| ;
USING: xmode.loader xmode.utilities xmode.rules namespaces
strings splitting assocs sequences kernel io.files xml memoize
-words globs combinators io.encodings.utf8 sorting accessors xml.data ;
+words globs combinators io.encodings.utf8 sorting accessors xml.data
+xml.traversal xml.syntax ;
IN: xmode.catalog
TUPLE: mode file file-name-glob first-line-glob ;
-<TAGS: parse-mode-tag ( modes tag -- )
+TAGS: parse-mode-tag ( modes tag -- )
-TAG: MODE
+TAG: MODE parse-mode-tag
dup "NAME" attr [
mode new {
{ "FILE" f (>>file) }
] dip
rot set-at ;
-TAGS>
-
: parse-modes-tag ( tag -- modes )
H{ } clone [
- swap child-tags [ parse-mode-tag ] with each
+ swap children-tags [ parse-mode-tag ] with each
] keep ;
MEMO: modes ( -- modes )
] if ;
: finalize-mode ( rulesets -- )
- rule-sets [
- dup [ nip finalize-rule-set ] assoc-each
+ dup rule-sets [
+ [ nip finalize-rule-set ] assoc-each
] with-variable ;
: load-mode ( name -- rule-sets )
USING: xmode.loader.syntax xmode.tokens xmode.rules
xmode.keyword-map xml.data xml.traversal xml assocs kernel
combinators sequences math.parser namespaces parser
-xmode.utilities parser-combinators.regexp io.files accessors ;
+xmode.utilities regexp io.files accessors xml.syntax ;
IN: xmode.loader
! Based on org.gjt.sp.jedit.XModeHandler
! RULES and its children
-<TAGS: parse-rule-tag ( rule-set tag -- )
+TAGS: parse-rule-tag ( rule-set tag -- )
-TAG: PROPS
+TAG: PROPS parse-rule-tag
parse-props-tag >>props drop ;
-TAG: IMPORT
+TAG: IMPORT parse-rule-tag
"DELEGATE" attr swap import-rule-set ;
-TAG: TERMINATE
+TAG: TERMINATE parse-rule-tag
"AT_CHAR" attr string>number >>terminate-char drop ;
-RULE: SEQ seq-rule
+RULE: SEQ seq-rule parse-rule-tag
shared-tag-attrs delegate-attr literal-start ;
-RULE: SEQ_REGEXP seq-rule
+RULE: SEQ_REGEXP seq-rule parse-rule-tag
shared-tag-attrs delegate-attr regexp-attr regexp-start ;
-RULE: SPAN span-rule
+RULE: SPAN span-rule parse-rule-tag
shared-tag-attrs delegate-attr match-type-attr span-attrs parse-begin/end-tags init-span-tag ;
-RULE: SPAN_REGEXP span-rule
+RULE: SPAN_REGEXP span-rule parse-rule-tag
shared-tag-attrs delegate-attr match-type-attr span-attrs regexp-attr parse-begin/end-tags init-span-tag ;
-RULE: EOL_SPAN eol-span-rule
+RULE: EOL_SPAN eol-span-rule parse-rule-tag
shared-tag-attrs delegate-attr match-type-attr literal-start init-eol-span-tag ;
-RULE: EOL_SPAN_REGEXP eol-span-rule
+RULE: EOL_SPAN_REGEXP eol-span-rule parse-rule-tag
shared-tag-attrs delegate-attr match-type-attr regexp-attr regexp-start init-eol-span-tag ;
-RULE: MARK_FOLLOWING mark-following-rule
+RULE: MARK_FOLLOWING mark-following-rule parse-rule-tag
shared-tag-attrs match-type-attr literal-start ;
-RULE: MARK_PREVIOUS mark-previous-rule
+RULE: MARK_PREVIOUS mark-previous-rule parse-rule-tag
shared-tag-attrs match-type-attr literal-start ;
-TAG: KEYWORDS ( rule-set tag -- key value )
+TAG: KEYWORDS parse-rule-tag
rule-set get ignore-case?>> <keyword-map>
- swap child-tags [ over parse-keyword-tag ] each
+ swap children-tags [ over parse-keyword-tag ] each
swap (>>keywords) ;
-TAGS>
-
: ?<regexp> ( string/f -- regexp/f )
- dup [ rule-set get ignore-case?>> <regexp> ] when ;
+ dup [ rule-set get ignore-case?>> <?insensitive-regexp> ] when ;
: (parse-rules-tag) ( tag -- rule-set )
<rule-set> dup rule-set set
: parse-rules-tag ( tag -- rule-set )
[
- [ (parse-rules-tag) ] [ child-tags ] bi
+ [ (parse-rules-tag) ] [ children-tags ] bi
[ parse-rule-tag ] with each
rule-set get
] with-scope ;
USING: accessors xmode.tokens xmode.rules xmode.keyword-map
xml.data xml.traversal xml assocs kernel combinators sequences
math.parser namespaces make parser lexer xmode.utilities
-parser-combinators.regexp io.files splitting arrays ;
+regexp io.files splitting arrays xml.syntax xml.syntax.private ;
IN: xmode.loader.syntax
! Rule tag parsing utilities
new swap init-from-tag swap add-rule ; inline
: RULE:
- scan scan-word
- parse-definition { } make
- swap [ (parse-rule-tag) ] 2curry (TAG:) ; parsing
+ scan scan-word scan-word [
+ parse-definition { } make
+ swap [ (parse-rule-tag) ] 2curry
+ ] dip swap define-tag ; parsing
! Attribute utilities
: string>boolean ( string -- ? ) "TRUE" = ;
[ "NAME" attr ] [ "VALUE" attr ] bi ;
: parse-props-tag ( tag -- assoc )
- child-tags
+ children-tags
[ parse-prop-tag ] H{ } map>assoc ;
: position-attrs ( tag -- at-line-start? at-whitespace-end? at-word-start? )
swap position-attrs <matcher> ;
: parse-regexp-matcher ( tag -- matcher )
- dup children>string rule-set get ignore-case?>> <regexp>
+ dup children>string
+ rule-set get ignore-case?>> <?insensitive-regexp>
swap position-attrs <matcher> ;
: shared-tag-attrs ( -- )
[ parse-literal-matcher >>end drop ] , ;
! SPAN's children
-<TAGS: parse-begin/end-tag ( rule tag -- )
+TAGS: parse-begin/end-tag ( rule tag -- )
-TAG: BEGIN
+TAG: BEGIN parse-begin/end-tag
! XXX
parse-literal-matcher >>start drop ;
-TAG: END
+TAG: END parse-begin/end-tag
! XXX
parse-literal-matcher >>end drop ;
-TAGS>
-
: parse-begin/end-tags ( -- )
[
! XXX: handle position attrs on span tag itself
- child-tags [ parse-begin/end-tag ] with each
+ children-tags [ parse-begin/end-tag ] with each
] , ;
: init-span-tag ( -- ) [ drop init-span ] , ;
USING: kernel namespaces make xmode.rules xmode.tokens
xmode.marker.state xmode.marker.context xmode.utilities
xmode.catalog sequences math assocs combinators strings
-parser-combinators.regexp splitting parser-combinators ascii
+regexp splitting ascii regexp.backend unicode.case
ascii combinators.short-circuit accessors ;
+! regexp.backend is for the regexp class
+
+! Next two words copied from parser-combinators
+! Just like head?, but they optionally ignore case
+
+: string= ( str1 str2 ignore-case -- ? )
+ [ [ >upper ] bi@ ] when sequence= ;
+
+: string-head? ( str1 str2 ignore-case -- ? )
+ 2over shorter?
+ [ 3drop f ] [
+ [
+ [ nip ]
+ [ length head-slice ] 2bi
+ ] dip string=
+ ] if ;
! Based on org.gjt.sp.jedit.syntax.TokenMarker
process-escape? get [
escaped? [ not ] change
position [ + ] change
- ] [ 2drop ] if ;
+ ] [ drop ] if ;
M: seq-rule handle-rule-start
?end-rule
USING: accessors xmode.tokens xmode.keyword-map kernel
sequences vectors assocs strings memoize unicode.case
-parser-combinators.regexp ;
+regexp regexp.backend ; ! regexp.backend has the regexp class
IN: xmode.rules
TUPLE: string-matcher string ignore-case? ;
+USING: assocs xmode.utilities tools.test ;
IN: xmode.utilities.tests
-USING: accessors xmode.utilities tools.test xml xml.data kernel
-strings vectors sequences io.files prettyprint assocs
-unicode.case ;
-
-TUPLE: company employees type ;
-
-: <company> V{ } clone f company boa ;
-
-: add-employee employees>> push ;
-
-<TAGS: parse-employee-tag
-
-TUPLE: employee name description ;
-
-TAG: employee
- employee new
- { { "name" f (>>name) } { f (>>description) } }
- init-from-tag swap add-employee ;
-
-TAGS>
-
-\ parse-employee-tag see
-
-: parse-company-tag
- [
- <company>
- { { "type" >upper (>>type) } }
- init-from-tag dup
- ] keep
- children>> [ tag? ] filter
- [ parse-employee-tag ] with each ;
-
-[
- T{ company f
- V{
- T{ employee f "Joe" "VP Sales" }
- T{ employee f "Jane" "CFO" }
- }
- "PUBLIC"
- }
-] [
- "vocab:xmode/utilities/test.xml"
- file>xml parse-company-tag
-] unit-test
USING: accessors sequences assocs kernel quotations namespaces
-xml.data xml.traversal combinators macros parser lexer words fry ;
+xml.data xml.traversal combinators macros parser lexer words fry
+regexp ;
IN: xmode.utilities
: implies ( x y -- z ) [ not ] dip or ; inline
-: child-tags ( tag -- seq ) children>> [ tag? ] filter ;
-
: tag-init-form ( spec -- quot )
{
{ [ dup quotation? ] [ [ object get tag get ] prepose ] }
: init-from-tag ( tag tuple specs -- tuple )
over [ (init-from-tag) ] dip ; inline
-SYMBOL: tag-handlers
-SYMBOL: tag-handler-word
-
-: <TAGS:
- CREATE tag-handler-word set
- H{ } clone tag-handlers set ; parsing
-
-: (TAG:) ( name quot -- ) swap tag-handlers get set-at ;
-
-: TAG:
- scan parse-definition
- (TAG:) ; parsing
-
-: TAGS>
- tag-handler-word get
- tag-handlers get >alist [ [ dup main>> ] dip case ] curry
- define ; parsing
+: <?insensitive-regexp> ( string ? -- regexp )
+ "i" "" ? <optioned-regexp> ;
: substituter ( assoc -- quot )
[ ?at drop ] curry ; inline
-: with-assoc ( assoc quot: ( value key -- assoc ) -- quot: ( key value -- ) )
+: with-assoc ( assoc quot: ( value key assoc -- ) -- quot: ( key value -- ) )
curry [ swap ] prepose ; inline
PRIVATE>
! Copyright (C) 2008 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
-USING: accessors regexp prettyprint io io.encodings.ascii
-io.files kernel sequences assocs namespaces ;
+USING: accessors regexp.matchers prettyprint io io.encodings.ascii
+io.files kernel sequences assocs namespaces regexp ;
IN: benchmark.regex-dna
! Based on http://shootout.alioth.debian.org/gp4/benchmark.php?test=regexdna&lang=ruby&id=1
projects / factor.git / commitdiff