正則表達(dá)式-OnigmoRegular+Expressions+Version+6語(yǔ)法

2016/12/25syntax:ONIG_SYNTAX_RUBY(default)o\thorizontaltab(水平制表符)(0x09)。lvverticaltab(垂直制表符)(0x0B)o\abell(響鈴)(0x07)o\cxcontrolchar(控制字符)(charactercodepointvalue)。\M-xmeta(x|0x80)(元)(charactercodepointvalue)1NotUnicode非Unicode的情形：alphanumeric((Letter|Mark|Number|Connector_Punctuation)此時(shí)，\w匹配內(nèi)容(包含字母、數(shù)字、標(biāo)點(diǎn)、連接符號(hào)),不包含中文等其他字符3includesornot.是否包含“非ASCII碼”,取決于選項(xiàng)ONIG_OPTION_ASCII_RANGE.NotUnicode非Unicode的情形：\t,\n,\v,\f,\r,\x20包含水平制表符、換行符、垂直制表符、換頁(yè)符、回車符·Unicode在Unicode的情形：0009,000A,000B,000C,000D,0085(NEL),45oISnon-whitespacechar非空o\ddecimaldigitchar十進(jìn)制的數(shù)字2*\p{property-name}使用\p{屬性名},可用屬性名見(jiàn)下方，\p和\P為相反。*\p{^property-name}(negative)小寫的\p{^pattern}等于大寫的\P{pattern}*\P{property-name}12345+worksonallencodingsAlnum,Alpha,Blank,Cntrl,Digit,Graph,Lower,Print,Punct,Space,Upper,XDigit,Word,ASCII+worksonEUCJP,ShiftJIS,CP932,Hiragana,Katakana,Han,Latin,Greek,+worksonUTF-8,UTF-16,UTF-32seeUnicodeProps.txt\p{Upper}\p{Upper}\p{ASCII}\p{Alpha}\p{Alnum}\p{Punct}\p{Graph}\p{Blank}\p{XDigit}\p{Space}\p{InGreek}\p{Lu}\p{Sc}\P{InGreek}6789所有ASCII:[\x00-\x7F]20212223字母數(shù)字字符：[\p{Alpha}\p{Digit}]標(biāo)點(diǎn)符號(hào)：!"#$號(hào)&'()*+,-./:;<=>?@[\]^_`{1}~可見(jiàn)字符：[\p(Alnum}\p{Punct}]可打印字符：[\p{Graph}\x20]空格或制表符：[\t]控制字符：[\x00-\x1F\x7F]十六進(jìn)制數(shù)字：[0-9a-fA-F]空白字符：[\t\n\x0B\f\r]所有希臘字符，比如α,β,y,2.....大寫字母(開(kāi)啟區(qū)分大小寫)貨幣符號(hào)(比如$,c,￥...)所有字符，除去希臘字符(注意P是大寫的)UnicodeProperty:字符屬于標(biāo)點(diǎn)、空格、字母等等。每個(gè)Unicode字符只能屬于唯一Unicode2425242526272829\p{L1}或\p{Lowercase_Letter}:小寫字符(必須有大寫的形式)。\p{Lu}或\p{Uppercase_Letter}:大寫字符(必須有小寫的形式)。\p{Lt}或\p{Titlecase_Letter}:全詞首字母大寫的字符。\p{L&}或\p{Cased_Letter}:存在大小寫形式的字符(Ll,Lu,Lt的組合)。\p{Lm}或\p{Modifier_Letter]:音標(biāo)修飾字符。\p{Lo}或\p{0ther_Letter}:不具有大小寫的字符或字形。\p{Mn}或\p{Non_Spacing_Mark}:與其他字符結(jié)合，不額外占用空間的字符，例如日耳曼語(yǔ)元\p{Mc}或\p{Spacing_Combining_Mark]:與其他字符結(jié)合，額外占用空間的字符，例如馬拉雅拉姆文#元音字母及附標(biāo)。\p{Me}或\p{Enclosing_Mark分隔符p{Z}takeupspace。40414243444546474041424344454647\p{Zp}或\p{ParagraphSeparator}:paragraphseparatorcharacterU+2029。\p{Sm}或\p{Math_Symbol}:數(shù)學(xué)符號(hào)。\p{Sc}或\p{Currency_Symbol}:通貨符號(hào)。\p{Sk]或\p{Modifier_Symbol}:組合為其他字符的符號(hào)。\p{So}或\p{Other_Symbol}:其他符號(hào)。\p{Nd}或\p{Decimal_Digit_Number}:所有文本中的數(shù)字0至9字符，不含形意符號(hào)。\p{N1}或\p{Letter_Number}:看起來(lái)像字母的符號(hào)，包含羅馬數(shù)字。\p{No}或\p{Other_Number}:上角標(biāo)或下角標(biāo)數(shù)字，或者其他不屬于0至9的數(shù)字。不含形意符48494849\p{Pd}或\p{Dash_Punctuation}:連字號(hào)或連接號(hào)。\p{Pc}或\p{Connector_Punctuation}:連接詞的標(biāo)點(diǎn)符號(hào)，如下劃線。\p{Po}或\p{0ther_Punctuation}:其他標(biāo)點(diǎn)符號(hào)。其它符號(hào)\p{C}(包括不可見(jiàn)控制字符與未用碼位)\p{Cc}或\p{Control]:ASCII或Latin-1控制字符0x00-0x1F與0x7F-0x9F。\p{Cf]或\p{Format}:不可見(jiàn)的格式化指示字符。\p{Co}或\p{Private_Use]:私用碼位。\p{Cs}或\p{Surrogate}:UTF-16編碼的代理對(duì)的一半。\p{Cn}或\p{Unassigned}:未被使用的碼位。九個(gè)字符"$+<=>^|~";在Unicode下則不然。1Unicode:(?>\x0D\x0AI[\x0A-\x0D\x{85}\x{2028}\x{2029}])Unicode:See:UnicodeStandardAnhttp:///reports/tr29/回溯)only)ex./a+/===/(?>a)/Abeginningoftheline行首o(hù)$endoftheline行尾o\bwordboundary單詞邊界o\Bnon-wordboundary非單詞邊界字符串尾，或換行符之前的末位[^c-g]z]==>([a-w]AND([^c-g]ORz))==>[abh-w]備注：Ifyouwanttouse'[,'-',or']'asanormalcharacterincharacterclass,youshouldescapethemwith"倘若要使用[,'-,或],需要使用“來(lái)轉(zhuǎn)義，在EmEditor中用\轉(zhuǎn)義。oNotUnicodeCase非Unicode編碼：asciicodevalue:[0-127]ASCII碼digit0-9數(shù)字graph\x21-\x7Eandallofmultibyteencodedcharacters圖形符號(hào)ascii0000-007FblankSpaceSeparator|0009cntrlControl|Format|Unassigned|PrivateUse|Surrogategraph[[:^space:l]&&^Control&&^Unassigned&&^Surrogateprint[[:graph:]|SpaceSeparatorpunctConnectorPunctuation|DashPunctuation|ClosePunctuationFinalPunctuation|InitialPunctuation|OtherPunctuation|OpenPunctuation|0024|002B|003C|003D|003E|005E|0060|007C|007EspaceSpaceSeparator|LineSeparator|ParagraphSeparator|0009|000A|000B|000C|000D|0085upperUppercaseLetterxdigit0030-0039|0041-0046|0061-0066(0-9,a-f,A-F)wordLetter|Mark|DecimalNumber|ConnectorPunctuationItdependsonONIGOPTIONASClIRANGEoptionandONIGOPTIONPOSIXBRACKETALLRANGEoptionthatPOSIXbracketsi:ignorecase忽略大小寫d:Default(compatiblewithRuby1.9.3)默認(rèn)(兼容Ruby1.9.3)\b,\BandPOSIXbracketsusetheeachencoding'srules.表達(dá)式\b,\B和POSIX字符集使用各自的編碼規(guī)則。a:ASCIIONIGOPTIONASClIRANGEoptionisturnedon.\w,\d,\sandPOSIXbracketsdoesn'tmatchnon-ASCllcharacters.\band\BusetheASCllrules.u:UnicodeONIGOPTIONASClIRANGEoptionisturnedoff.\w(\W),\d(\D),\s(\S),\b(\B)andPOSIXbracketsusetheeachencoding'srules.o(?<!subexp)negativelook-behind否定回顧備注：Subexpoflook-behindmustbefixed-width.Buttop-levelalternativescanbeofvariouslengths.ex.(?<=a|bc)isOK.(?<=aaa(?:b|cd))isnotallowed.Innegativelook-behind,capturinggroupisn'tallowed,butnon-capturinggroup(?:)isallowed.前視的表達(dá)式必須固定寬度。但如果使用了或操作，頂層的長(zhǎng)度可以變化，比如(?<=a|bc)是可以的，但(?<=aaa(?:b|cd))是不可以的。Anotherexpressionoflook-behind.Keepthestuffleftofthe\K,don'tincludeitin回顧的另一種寫法。(?<=幾度)夕陽(yáng)紅與幾度\K夕陽(yáng)紅是等效的解匹配；而原子組則是最小單元，不拆解直接匹配。o(?subexp),(?'name'subexp)definenamedgroup命名組Notonlyanamebutanumberisassignedlikeacapturinggroup.不僅是名稱，編號(hào)也可以像捕獲組一樣分配。Assigningthesamenametotwoormoresubexpsisallowed.允許分配相同的名稱給兩個(gè)或多個(gè)表達(dá)式。conditionalexpression條Matchesyes-subexpif(cond)yieldsatruevalue,matchesno-subexpotherwise.條件返回真值時(shí)，執(zhí)行Yes表達(dá)式；返回假值時(shí)，執(zhí)行No表達(dá)式。Following(cond)canbeused:可以使用以下的條件：(n)(n>=1)Checksifthenumberedcapturinggrouphasmatchedsomething.檢查編號(hào)的捕獲組是否已經(jīng)匹配到內(nèi)容。(),('name')Checksifagroupwiththegivennamehasmatchedsomething.檢查一個(gè)命名組是否已經(jīng)匹配到內(nèi)容。BUG:Ifthenameisdefinedmorethanonce,theleft-mostgroupischecked,butit中的字符串不包含。例如，(?~中)華這個(gè)表達(dá)式，匹配中華牙膏中的華字；也匹配清華大學(xué)中的清華；匹配光華路中的光華。Moreprecisely,(?~subexp)matchesthecomplementsetofasetwhich.subexp.matches.Thisisregularinthemeaningofformallanguagetheory.Similarto(?:(?!subexp).)*,buteasytowrite."abc","aabc","ccabcdd",etc.V*(?~*V)*VmatchesCstylecomments:"/*/","/foobar*/",etc.\AV*(?~*V)*Wzdoesn'tmatch"/**1/".Thisisdifferentfrom\AV*.?*\zwhichusesareluctantquantifier(.*?).Unlike(?:(?!abc).)*c,(?~abc)cmatches"abc",because(?~abc)matches"ab".(?~)nevermatches.34paper.pdfpresen.pdfhttps://staff.aist.go.jp/tanaka-akira/pub/prosym49-akr-https://staff.aist.go.jp/tanaka-akira/pub/prosym49-akr-Whenwesay"backreferenceagroup,"itactuallymeans,"re-matchthesametextmatchedbythesubexpinthatgroup."\n\k\k'n'(n>=1)backreferencethenthgroupintheregexp\k<-n>\k'-n'(n>=1)backreferencethenthgroupcountingbackwardsfromthereferringposition\k\k'name'backreferenceagroupwiththespecifiednameWhenbackreferencingwithanamethatisassignedtomorethanonegroups,thelastgroupwiththenameischeckedfirst,ifnotmatchedthenthepreviousonewiththename,andsoon,untilthereisoBackreferencebynumberisforbiddenifanynamedgroupisdefinedandONIGOPTIONCAPTUREGROUPisnotset.oONIGSYNTAXPERL:\g{n},\g{-n}and\g{name}canalsobeused.IfanameisdefinedmorethanonceinPerlsyntax,onlytheleft-mostgroupischecked.backreferencewithrecursionlevel(n>=1,level>=\k<n+level>\k'n+level'\k\k'n-evel'\k<-n+level>\k'-n+level'\k<-n-level>\k'-n-level'\k<name+level>\k'name+level'\k\k'name-level'AA(?|.|(?:(?.)\g\k<b+0>)\z/.match("reer")r=Rpile(<<'REGEXP'.strip,Regexp::EX(?[a-zA-Z_:]+){0}(?[^<&]+(\gI[^<&]+)*){0}(?</\k<name+1>>){0}\go\g<-n>lg'-n'(n>=1)callthenthgroupcountingbackwardsfromthecallingpositionex.(?a|\gb)=>error(?a|blgc)=>OKoTheoptionstatusofthecalledgroupisalwayseffective.ex.I