|
|
|
|
@ -1,437 +1,183 @@
|
|
|
|
|
! 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
|
|
|
|
|
combinators regexp.classes strings splitting peg locals ;
|
|
|
|
|
IN: regexp.parser
|
|
|
|
|
|
|
|
|
|
FROM: math.ranges => [a,b] ;
|
|
|
|
|
TUPLE: range from to ;
|
|
|
|
|
TUPLE: char-class ranges ;
|
|
|
|
|
TUPLE: primitive-class class ;
|
|
|
|
|
TUPLE: not-char-class ranges ;
|
|
|
|
|
TUPLE: not-primitive-class class ;
|
|
|
|
|
TUPLE: from-to n m ;
|
|
|
|
|
TUPLE: at-least n ;
|
|
|
|
|
TUPLE: up-to n ;
|
|
|
|
|
TUPLE: exactly n ;
|
|
|
|
|
TUPLE: times expression times ;
|
|
|
|
|
TUPLE: concatenation seq ;
|
|
|
|
|
TUPLE: alternation seq ;
|
|
|
|
|
TUPLE: maybe term ;
|
|
|
|
|
TUPLE: star term ;
|
|
|
|
|
TUPLE: plus term ;
|
|
|
|
|
TUPLE: with-options tree options ;
|
|
|
|
|
TUPLE: ast ^? $? tree ;
|
|
|
|
|
SINGLETON: any-char
|
|
|
|
|
|
|
|
|
|
TUPLE: concatenation seq ; INSTANCE: concatenation node
|
|
|
|
|
TUPLE: alternation seq ; INSTANCE: alternation node
|
|
|
|
|
TUPLE: kleene-star term ; INSTANCE: kleene-star node
|
|
|
|
|
: allowed-char? ( ch -- ? )
|
|
|
|
|
".()|[*+?" member? not ;
|
|
|
|
|
|
|
|
|
|
! !!!!!!!!
|
|
|
|
|
TUPLE: possessive-question term ; INSTANCE: possessive-question node
|
|
|
|
|
TUPLE: possessive-kleene-star term ; INSTANCE: possessive-kleene-star node
|
|
|
|
|
ERROR: bad-number ;
|
|
|
|
|
|
|
|
|
|
! !!!!!!!!
|
|
|
|
|
TUPLE: reluctant-question term ; INSTANCE: reluctant-question node
|
|
|
|
|
TUPLE: reluctant-kleene-star term ; INSTANCE: reluctant-kleene-star node
|
|
|
|
|
: ensure-number ( n -- n )
|
|
|
|
|
[ bad-number ] unless* ;
|
|
|
|
|
|
|
|
|
|
TUPLE: negation term ; INSTANCE: negation node
|
|
|
|
|
TUPLE: constant char ; INSTANCE: constant node
|
|
|
|
|
TUPLE: range from to ; INSTANCE: range node
|
|
|
|
|
:: at-error ( key assoc quot: ( key -- replacement ) -- value )
|
|
|
|
|
key assoc at* [ drop key quot call ] unless ; inline
|
|
|
|
|
|
|
|
|
|
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
|
|
|
|
|
ERROR: bad-class name ;
|
|
|
|
|
|
|
|
|
|
SINGLETON: epsilon INSTANCE: epsilon node
|
|
|
|
|
: 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 ;
|
|
|
|
|
|
|
|
|
|
TUPLE: option option on? ; INSTANCE: option node
|
|
|
|
|
: lookup-escape ( char -- ast )
|
|
|
|
|
{
|
|
|
|
|
{ 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 boa ] }
|
|
|
|
|
{ CHAR: W [ c-identifier-class not-primitive-class boa ] }
|
|
|
|
|
{ CHAR: s [ java-blank-class primitive-class boa ] }
|
|
|
|
|
{ CHAR: S [ java-blank-class not-primitive-class boa ] }
|
|
|
|
|
{ CHAR: d [ digit-class primitive-class boa ] }
|
|
|
|
|
{ CHAR: D [ digit-class not-primitive-class boa ] }
|
|
|
|
|
|
|
|
|
|
[ ]
|
|
|
|
|
} case ;
|
|
|
|
|
|
|
|
|
|
TUPLE: options on off ;
|
|
|
|
|
|
|
|
|
|
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 ;
|
|
|
|
|
: 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 )
|
|
|
|
|
{
|
|
|
|
|
{ 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 ]
|
|
|
|
|
} case ;
|
|
|
|
|
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 ( on off -- options )
|
|
|
|
|
[ [ ch>option ] map ] bi@ options boa ;
|
|
|
|
|
|
|
|
|
|
: (parse-options) ( string ? -- ) [ toggle-option ] curry each ;
|
|
|
|
|
! TODO: make range syntax better (negation, and, etc),
|
|
|
|
|
! add syntax for various parenthized things,
|
|
|
|
|
! add greedy and nongreedy forms of matching
|
|
|
|
|
! (once it's all implemented)
|
|
|
|
|
|
|
|
|
|
: parse-options ( string -- )
|
|
|
|
|
"-" split1 [ t (parse-options) ] [ f (parse-options) ] bi* ;
|
|
|
|
|
EBNF: (parse-regexp)
|
|
|
|
|
|
|
|
|
|
ERROR: bad-special-group string ;
|
|
|
|
|
CharacterInBracket = !("}") Character
|
|
|
|
|
|
|
|
|
|
DEFER: (parse-regexp)
|
|
|
|
|
: nested-parse-regexp ( token ? -- )
|
|
|
|
|
[ push-stack (parse-regexp) pop-stack ] dip
|
|
|
|
|
[ <negation> ] when pop-stack new swap >>term push-stack ;
|
|
|
|
|
Escape = "p{" CharacterInBracket*:s "}" => [[ s >string name>class primitive-class boa ]]
|
|
|
|
|
| "P{" CharacterInBracket*:s "}" => [[ s >string name>class not-primitive-class boa ]]
|
|
|
|
|
| "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 ]]
|
|
|
|
|
|
|
|
|
|
! 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 ;
|
|
|
|
|
Character = "\\" Escape:e => [[ e ]]
|
|
|
|
|
| . ?[ allowed-char? ]?
|
|
|
|
|
|
|
|
|
|
: handle-left-parenthesis ( -- )
|
|
|
|
|
peek1 CHAR: ? =
|
|
|
|
|
[ drop1 (parse-special-group) ]
|
|
|
|
|
[ capture-group f nested-parse-regexp ] if ;
|
|
|
|
|
AnyRangeCharacter = Character | "["
|
|
|
|
|
|
|
|
|
|
: 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 ;
|
|
|
|
|
RangeCharacter = !("]") AnyRangeCharacter
|
|
|
|
|
|
|
|
|
|
ERROR: unmatched-brace ;
|
|
|
|
|
: parse-repetition ( -- start finish ? )
|
|
|
|
|
"}" read-until [ unmatched-brace ] unless
|
|
|
|
|
[ "," split1 [ string>number ] bi@ ]
|
|
|
|
|
[ CHAR: , swap index >boolean ] bi ;
|
|
|
|
|
Range = RangeCharacter:a "-" RangeCharacter:b => [[ a b range boa ]]
|
|
|
|
|
| RangeCharacter
|
|
|
|
|
|
|
|
|
|
: replicate/concatenate ( n obj -- obj' )
|
|
|
|
|
over zero? [ 2drop epsilon ]
|
|
|
|
|
[ <repetition> first|concatenation ] if ;
|
|
|
|
|
StartRange = AnyRangeCharacter:a "-" RangeCharacter:b => [[ a b range boa ]]
|
|
|
|
|
| AnyRangeCharacter
|
|
|
|
|
|
|
|
|
|
: exactly-n ( n -- )
|
|
|
|
|
stack pop replicate/concatenate push-stack ;
|
|
|
|
|
Ranges = StartRange:s Range*:r => [[ r s prefix ]]
|
|
|
|
|
|
|
|
|
|
: at-least-n ( n -- )
|
|
|
|
|
stack pop
|
|
|
|
|
[ replicate/concatenate ] keep
|
|
|
|
|
<kleene-star> 2array <concatenation> push-stack ;
|
|
|
|
|
CharClass = "^" Ranges:e => [[ e not-char-class boa ]]
|
|
|
|
|
| Ranges:e => [[ e char-class boa ]]
|
|
|
|
|
|
|
|
|
|
: at-most-n ( n -- )
|
|
|
|
|
1+
|
|
|
|
|
stack pop
|
|
|
|
|
[ replicate/concatenate ] curry map <alternation> push-stack ;
|
|
|
|
|
Options = [idmsux]*
|
|
|
|
|
|
|
|
|
|
: from-m-to-n ( m n -- )
|
|
|
|
|
[a,b]
|
|
|
|
|
stack pop
|
|
|
|
|
[ replicate/concatenate ] curry map
|
|
|
|
|
<alternation> push-stack ;
|
|
|
|
|
Parenthized = "?:" Alternation:a => [[ a ]]
|
|
|
|
|
| "?" Options:on "-"? Options:off ":" Alternation:a
|
|
|
|
|
=> [[ a on off parse-options with-options boa ]]
|
|
|
|
|
| "?#" [^)]* => [[ ignore ]]
|
|
|
|
|
| Alternation
|
|
|
|
|
|
|
|
|
|
ERROR: invalid-range a b ;
|
|
|
|
|
Element = "(" Parenthized:p ")" => [[ p ]]
|
|
|
|
|
| "[" CharClass:r "]" => [[ r ]]
|
|
|
|
|
| ".":d => [[ any-char ]]
|
|
|
|
|
| Character
|
|
|
|
|
|
|
|
|
|
: 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 ;
|
|
|
|
|
Number = (!(","|"}").)* => [[ string>number ensure-number ]]
|
|
|
|
|
|
|
|
|
|
: handle-front-anchor ( -- ) beginning-of-line push-stack ;
|
|
|
|
|
: handle-back-anchor ( -- ) end-of-line push-stack ;
|
|
|
|
|
Times = "," Number:n "}" => [[ n up-to boa ]]
|
|
|
|
|
| Number:n ",}" => [[ n at-least boa ]]
|
|
|
|
|
| Number:n "}" => [[ n exactly boa ]]
|
|
|
|
|
| "}" => [[ bad-number ]]
|
|
|
|
|
| Number:n "," Number:m "}" => [[ n m from-to boa ]]
|
|
|
|
|
|
|
|
|
|
ERROR: bad-character-class obj ;
|
|
|
|
|
ERROR: expected-posix-class ;
|
|
|
|
|
Repeated = Element:e "{" Times:t => [[ e t times boa ]]
|
|
|
|
|
| Element:e "?" => [[ e maybe boa ]]
|
|
|
|
|
| Element:e "*" => [[ e star boa ]]
|
|
|
|
|
| Element:e "+" => [[ e plus boa ]]
|
|
|
|
|
| Element
|
|
|
|
|
|
|
|
|
|
: 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 ;
|
|
|
|
|
Concatenation = Repeated*:r => [[ r concatenation boa ]]
|
|
|
|
|
|
|
|
|
|
: 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 ;
|
|
|
|
|
Alternation = Concatenation:c ("|" Concatenation)*:a
|
|
|
|
|
=> [[ a empty? [ c ] [ a values c prefix alternation boa ] if ]]
|
|
|
|
|
|
|
|
|
|
ERROR: bad-escaped-literals seq ;
|
|
|
|
|
End = !(.)
|
|
|
|
|
|
|
|
|
|
: parse-til-E ( -- obj )
|
|
|
|
|
"\\E" read-until [ bad-escaped-literals ] unless ;
|
|
|
|
|
Main = Alternation End
|
|
|
|
|
;EBNF
|
|
|
|
|
|
|
|
|
|
:: (parse-escaped-literals) ( quot: ( obj -- obj' ) -- obj )
|
|
|
|
|
parse-til-E
|
|
|
|
|
drop1
|
|
|
|
|
[ epsilon ] [
|
|
|
|
|
quot call [ <constant> ] V{ } map-as
|
|
|
|
|
first|concatenation
|
|
|
|
|
] if-empty ; inline
|
|
|
|
|
|
|
|
|
|
: parse-escaped-literals ( -- obj )
|
|
|
|
|
[ ] (parse-escaped-literals) ;
|
|
|
|
|
|
|
|
|
|
: lower-case-literals ( -- obj )
|
|
|
|
|
[ >lower ] (parse-escaped-literals) ;
|
|
|
|
|
|
|
|
|
|
: upper-case-literals ( -- obj )
|
|
|
|
|
[ >upper ] (parse-escaped-literals) ;
|
|
|
|
|
|
|
|
|
|
: 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 ;
|
|
|
|
|
|
|
|
|
|
: 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 ;
|
|
|
|
|
|
|
|
|
|
: 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 ;
|
|
|
|
|
|
|
|
|
|
: handle-left-bracket ( -- )
|
|
|
|
|
beginning-of-character-class push-stack
|
|
|
|
|
parse-character-class-first (parse-character-class) ;
|
|
|
|
|
|
|
|
|
|
: finish-regexp-parse ( stack -- obj )
|
|
|
|
|
{ pipe } split
|
|
|
|
|
[ first|concatenation ] map first|alternation ;
|
|
|
|
|
|
|
|
|
|
: 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* ;
|
|
|
|
|
|
|
|
|
|
: 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 ;
|
|
|
|
|
|
|
|
|
|
: (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 ;
|
|
|
|
|
: parse-regexp ( string -- regexp )
|
|
|
|
|
! Hack because I want $ allowable in regexps,
|
|
|
|
|
! but with special behavior at the end
|
|
|
|
|
! This fails if the regexp is stupid, though...
|
|
|
|
|
dup first CHAR: ^ = tuck [ rest ] when
|
|
|
|
|
dup peek CHAR: $ = tuck [ but-last ] when
|
|
|
|
|
(parse-regexp) ast boa ;
|
|
|
|
|
|
Daniel Ehrenberg