रेग्युलर एक्सप्रेशन इंजिन की तुलना का स्रोत देखें

यहाँ [[रेग्युलर ऍक्सप्रैशन|रेग्युलर एक्सप्रेशन]] के इंजनों की विभिन्न दृष्टियों से तुलना की गयी है।

==लाइब्रेरी==
<!-- In each table, link one (often 1st) instance of terms, remove other WP:REPEATLINK(s). -->
{| class="wikitable sortable" style="text-align: center; font-size: 85%; width: auto; table-layout: fixed;"
|+ रेग्युलर इक्सप्रेशन की लाइब्रेरियों की सूची
|-
! style="width: 12em" | नाम
! वेबसाइट
! [[प्रोग्रामिंग भाषा|प्रोग्रामन भाषा]]
! [[सॉफ्टवेयर लाइसेंस]]
! कहाँ प्रयुक्त 
|-
! {{Rh}} | [[Boost C++ Libraries|Boost]].Regex{{R|group=Note|boost_regex_formerly_regex}}
| [http://www.boost.org/libs/regex/doc/html/ Boost C++ Libraries]
| [[सी++|C++]]
| {{free|[[Boost Software License|Boost]]}}
| Notepad++ >= 6.0.0, [[EmEditor]]
|-
! {{Rh}} | Boost{{Not a typo|.}}Xpressive
| [https://web.archive.org/web/20171122085942/http://www.boost.org/doc/libs/1_55_0/doc/html/xpressive.html Boost C++ Libraries]
| C++
| {{free|Boost}}
| &nbsp;
|-
! {{Rh}} | [[CL-PPCRE]]
| [https://web.archive.org/web/20171126070414/http://weitz.de/cl-ppcre/ Edi Weitz]
| [[Common Lisp]]
| {{free|[[BSD licenses|BSD]]}}
| &nbsp;
|-
! {{Rh}} | [[cppre]]
| [https://archive.is/20081203133158/http://jeff.bleugris.com/journal/projects/ Jeff Stuart]
| C++
| {{free|[[GNU General Public License|GPL]]}}
| &nbsp;
|-
! {{Rh}} | DEELX
| [https://web.archive.org/web/20081201072631/http://www.regexlab.com/en/deelx/ RegExLab]
| C++
| {{free}} personal and commercial use
| &nbsp;
|-
! {{Rh}} | FREJ{{R|group=Note|fuzzy_regexp_libraries}}
| [http://frej.sf.net Fuzzy Regular Expressions for Java]
| [[Java (programming language)|Java]]
| {{free|[[GNU Lesser General Public License|LGPL]]}}
| &nbsp;
|-
! {{Rh}} | [[GLib]]/GRegex{{R|group=Note|glib_gregex_version}}
| [https://web.archive.org/web/20161019054236/https://developer.gnome.org/glib/unstable/glib-Perl-compatible-regular-expressions.html GLib reference manual]
| [[सी (प्रोग्रामिंग भाषा)|C]]
| {{free|LGPL}}
| &nbsp;
|-
! {{Rh}} | [[GRETA]]
| [https://web.archive.org/web/20150429121946/http://research.microsoft.com/en-us/downloads/bd99f343-4ff4-4041-8293-34c054efe749/ Microsoft Research]
| C++
| {{dunno}}
| &nbsp;
|-
! {{Rh}} | [https://web.archive.org/web/20180826173547/http://titan-ic.com/products/helios-rxpf Helios RXPF]
| [https://web.archive.org/web/20180710153448/http://titan-ic.com/ Titan IC]
| RTL
| {{Proprietary}} 
| hardware accelerated regex engine for cybersecurity OEMs
| &nbsp;
|-
! {{Rh}} | [[International Components for Unicode|ICU]]
| [https://web.archive.org/web/20070813060837/http://www.icu-project.org/userguide/regexp.html International Components for Unicode]
| C, C++{{R|group=Note|icu4j}}
| {{free|[http://source.icu-project.org/repos/icu/icu/trunk/license.html ICU]}}
|[[Foundation Kit|Foundation]] (Apple and Swift open-source versions)
|-
! {{Rh}} | [[Jakarta turbine|Jakarta]]/Regexp
| [https://web.archive.org/web/20150722173522/http://attic.apache.org/projects/jakarta-regexp.html The Apache Jakarta Project]
| Java
| {{free|[[Apache License|Apache]]}}
| &nbsp;
|-
! {{Rh}} | java.util.regex
| [https://web.archive.org/web/20180309105306/https://docs.oracle.com/javase/7/docs/api/java/util/regex/package-summary.html Java's User manual]
| Java
| {{Proprietary}} [https://web.archive.org/web/20180727014245/https://java.com/en/download/faq/distribution.xml Java license]
| [[jEdit]]
|-
! {{Rh}} | JRegex
| [https://web.archive.org/web/20180527140733/http://jregex.sourceforge.net/ JRegex]
| Java
| {{free|BSD}}
| &nbsp;
|-
! {{Rh}} | [[Oniguruma]]
| [https://web.archive.org/web/20150807014439/http://www.geocities.jp/kosako3/oniguruma/ Kosako]
| C
| {{free|BSD}}
| [[Atom (text editor)|Atom]], [[Take Command Console]], [[Tera Term]], [[TextMate]], [[Sublime Text]], [[SubEthaEdit]], [[EmEditor]] and jq
|-
! {{Rh}} | Pattwo
| [https://web.archive.org/web/20171002104442/http://www.javaregex.com/home.html Stevesoft]
| Java (compatible with Java 1.0)
| {{free|LGPL}}
| &nbsp;
|-
! {{Rh}} | [[Perl Compatible Regular Expression|PCRE]]
| [https://web.archive.org/web/20180716233429/http://pcre.org/ pcre.org]
| C, C++{{R|group=Note|pcre_cpp}}
| {{free|BSD}}
| [[Nginx]], [[Julia (programming language)|Julia]], [[HHVM]], Notepad++ < 6.0.0, [[पीएचपी|PHP]]
|-
! {{Rh}} | [[Qt (toolkit)|Qt]]/QRegExp
| [https://web.archive.org/web/20131212075949/http://qt-project.org/doc/qt-5.1/qtcore/qregexp.html Digia]
| C++
| {{free|[http://qt-project.org/doc/qt-5.1/qtdoc/gpl.html Qt GNU GPL v. 3.0],
[http://qt-project.org/doc/qt-5.1/qtdoc/lgpl.html Qt GNU LGPL v. 2.1],
[http://qt-project.org/doc/qt-5.1/qtdoc/commerciallicense.html Qt Commercial]}}
| [[Kate (text editor)|Kate]], [[Kile]]
|-
! {{Rh}} | regex - [[Henry Spencer]]'s regular expression libraries
| [https://web.archive.org/web/20110709223056/http://www.arglist.com/regex ArgList]
| C
| {{free|BSD}}
| &nbsp;
|-
! {{Rh}} | [[RE2 (software)|RE2]]
| [https://web.archive.org/web/20180815052851/https://github.com/google/re2 RE2]
| C++
| {{free|BSD}}
| &nbsp;
|-
! {{Rh}} | [[Henry Spencer]]'s Advanced Regular Expressions 
| [https://web.archive.org/web/20131122023923/http://www2.tcl.tk/461 Tcl]
| C
| {{free|BSD}}
| &nbsp;
|-
!{{Rh}} | Hyperscan
| [https://web.archive.org/web/20190116155242/https://01.org/hyperscan Intel]
| C, [[x86]]-specific assembly ([[SSSE3]]+<ref>{{Cite web |url=https://intel.github.io/hyperscan/dev-reference/getting_started.html#requirements |title=संग्रहीत प्रति |access-date=15 जुलाई 2018 |archive-url=https://web.archive.org/web/20180704034157/http://intel.github.io/hyperscan/dev-reference/getting_started.html#requirements |archive-date=4 जुलाई 2018 |url-status=dead }}</ref>)
| {{free|3-clause BSD}}
|
|-
! {{Rh}} | SubReg
| [https://web.archive.org/web/20180612221709/https://github.com/mattbucknall/subreg Matt Bucknall]
| C
| {{free|MIT}}
| &nbsp;
|-
! {{Rh}} | [[TRE (computing)|TRE]]{{R|group=Note|fuzzy_regexp_libraries}}
| [https://web.archive.org/web/20180913112945/https://laurikari.net/tre/ Ville Laurikari]
| C
| {{free|BSD}}
| &nbsp;
|-
! {{Rh}} | TPerlRegEx
| [https://web.archive.org/web/20180725061305/http://www.regexbuddy.com/delphi.html TPerlRegEx VCL Component]
| [[Object Pascal]]
| {{free|[[Mozilla Public License|MPLv1.1]]}}
| &nbsp;
|-
! {{Rh}} | TRegExpr
| [https://web.archive.org/web/20090502051956/http://www.regexpstudio.com/TRegExpr/TRegExpr.html RegExp Studio]
| Object Pascal
| {{partial|Dual-license: [[freeware]], or LGPL with static linking exception}}
| [[Total Commander]]
|-
! {{Rh}} | RGX
| [https://web.archive.org/web/20110715032327/https://www.p6r.com/software/rgx.html RGX ]
| C++ based component library
| {{proprietary|[https://www.p6r.com/p6r-software-library-license-1-1.html P6R]}}
| &nbsp;
|-
! {{Rh}} | XRegExp
| [https://web.archive.org/web/20180707051211/http://xregexp.com/ XRegExp]
| JavaScript
| {{free|[[MIT License|MIT]]}}
| &nbsp;
|-
! {{Rh}} | [[Wolfram Language]] ([[Mathematica]])
| [https://web.archive.org/web/20180714230050/http://reference.wolfram.com/language/ Wolfram Language Documentation Center]
| [[Wolfram Language]]
| 
| [[Mathematica]], the [[Wolfram Development Platform]]
|}
{{Reflist|group=Note|refs=
<ref name=boost_regex_formerly_regex>Formerly called Regex++</ref>
<ref name=glib_gregex_version>Included since version 2.13.0</ref>
<ref name=pcre_cpp>C++ bindings were developed by Google and became officially part of PCRE in 2006.</ref>
<ref name=fuzzy_regexp_libraries>One of [[Regular expression#Fuzzy regular expressions|fuzzy regular expression]] engines</ref>
<ref name=icu4j>ICU4J, the Java version, does not support regular expressions.</ref>
}}

==भाषाएँ==
{| class="wikitable sortable" style="text-align: center; font-size: 0.85em; line-height: 1.3em; width: auto; table-layout: fixed;"
|+ उन प्रोग्रामन भाषाओं की सूची जिनमें रेग्युलर इक्सप्रेसन का उपयोग हुआ है।
|-
! भाषा
! जालस्थल
! [[सॉफ्टवेयर लाइसेंस]]
! टिप्पणी
|-
! {{Rh}} | [[.NET Framework|.NET]]
| [https://web.archive.org/web/20081012130335/http://msdn2.microsoft.com/en-us/library/system.text.regularexpressions.aspx MSDN]
| {{free|[[MIT License]]{{R|group=Note|dotnet_regex_license}}{{R|group=Note|dotnet_license}}}}
| style="text-align: left;" | 
|-
! {{Rh}} | [[C POSIX library#regex|POSIX C]] ([[सी (प्रोग्रामिंग भाषा)|C]])
| [http://bxr.su/o/lib/libc/regex/regcomp.c libc/regex from BSD]
| BSD
| style="text-align: left;" | According to [http://mdoc.su/o/regex.3 regex(3)], available from at least 4.4BSD (if not earlier)
|-
! {{Rh}} | [[C++11#regex|C++11]] ([[सी++|C++]])
| [https://web.archive.org/web/20180714125833/https://isocpp.org/ C++ standards website]
| {{dunno}}
| style="text-align: left;" | Since ISO14822:2011(e)
|-
! {{Rh}} | [[D (programming language)|D]]
| [https://web.archive.org/web/20180713113021/https://digitalmars.com/d/ D]
| {{free|[[Boost Software License]]{{R|group=Note|boost_mars}}}}
| style="text-align: left;" | 
|-
! {{Rh}} | [[Go (programming language)|Go]]
| [https://web.archive.org/web/20180703082245/https://golang.org/pkg/regexp/ Golang.org]
| {{free|[http://golang.org/LICENSE BSD-style]}}
| style="text-align: left;" | 
|-
! {{Rh}} | [[Haskell (programming language)|Haskell]]
| [https://web.archive.org/web/20141014103401/http://www.haskell.org/haskellwiki/Regular_expressions Haskell.org]
| {{free|BSD3}}
| style="text-align: left;" | Omitted in the language report, and in GHC's Hierarchical Libraries
|-
! {{Rh}} | [[Java (programming language)|Java]]
| [https://web.archive.org/web/20191216120820/https://www.java.com/en/ Java]
| {{free|[[GNU General Public License]]}}
| style="text-align: left;" | REs are written as strings in source code: all backslashes must be doubled, harming readability.
|-
! {{Rh}} | [[JavaScript]] ([[ECMAScript]])
| [https://web.archive.org/web/20151230125157/http://www.ecma-international.org/publications/standards/Ecma-262.htm ECMA-262]
| {{free|BSD3}}
| style="text-align: left;" | Limited but REs are first-class citizens of the language with a specific <code>/.../mod</code> syntax.
|-
! {{Rh}} | [[Julia (programming language)|Julia]]
| [https://www.webcitation.org/6Gqdtdypc?url=http://julialang.org/ JuliaLang.org]
| {{free|[[MIT License]]}}
| style="text-align: left;" | REs are part of the language core library using PCRE built-in and an optional wrapper for (C code) ICU is available.
|-
! {{Rh}} | [[Lua (programming language)|Lua]]
| [https://web.archive.org/web/20191002024221/https://www.lua.org/ Lua.org]
| {{free|[[MIT License]]}}
| style="text-align: left;" | Uses simplified, limited dialect; can be bound to more powerful library, like PCRE or an alternative parser like LPeg.
|-
! {{Rh}} | [[Mathematica]]
| [https://web.archive.org/web/20180715072440/http://wolfram.com/mathematica/ Wolfram]
| [[अमुक्त स्रोत|Proprietary]]
| style="text-align: left;" |
|-
! {{Rh}} | [[Nim (programming language)|Nim]]
| [https://web.archive.org/web/20170506133022/https://nim-lang.org/ nim-lang.org]
| {{free|[[MIT License]]}}
| style="text-align: left;" | Standard library includes PCRE-based [https://web.archive.org/web/20181010175616/https://nim-lang.org/docs/re.html re] and [https://web.archive.org/web/20181010175240/https://nim-lang.org/docs/nre.html nre] modules, as well as various alternatives (ex. [https://web.archive.org/web/20180624205634/https://nim-lang.org/docs/strutils.html strutils], [https://web.archive.org/web/20181010175501/https://nim-lang.org/docs/pegs.html pegs] ([[Parsing Expression Grammar]] matching), [https://web.archive.org/web/20181010175945/https://nim-lang.org/docs/strscans.html strscans], [https://web.archive.org/web/20181010175434/https://nim-lang.org/docs/parseutils.html parseutils], etc).
|-
! {{Rh}} | [[Free Pascal]] ([[Object Pascal]])
| [https://web.archive.org/web/19990125095436/http://www.freepascal.org/ www.freepascal.org]
| {{partial|[[LGPL]] with static linking exception}}
| style="text-align: left;" | Free Pascal 2.6+ ships with TRegExpr from Sorokin and two other regular expression libraries; See [https://web.archive.org/web/20180802161407/http://wiki.lazarus.freepascal.org/Regexpr wiki.lazarus.freepascal.org/Regexpr].
|-
! {{Rh}} | [[OCaml]]
| [http://arquivo.pt/wayback/20160515115919/http://caml.inria.fr/pub/docs/manual-ocaml/libref/Str.html Caml]
| {{free|[[LGPL]]}}
| style="text-align: left;" | {{As of|2010}}, the standard module is generally regarded as deprecated;<ref>[https://stackoverflow.com/questions/3221067#comment3323649_3221067]</ref> often recommended libraries are [https://web.archive.org/web/20180611004918/https://github.com/mmottl/pcre-ocaml pcre] (with full support for PCRE) and [https://web.archive.org/web/20180611014338/https://github.com/ocaml/ocaml-re re] (which is not as complete but claims better performance and provides frontends to popular syntaxes: PCRE, Perl, Posix, Emacs, shell globbing).
|-
! {{Rh}} | [[Perl]]
| [https://web.archive.org/web/20100716124446/http://www.perl.com/doc/manual/html/pod/perlre.html Perl.com]
| {{free|[[Artistic License]], or [[GNU General Public License]]}}
| style="text-align: left;" | Full, central part of the language
|-
! {{Rh}} | [[पीएचपी|PHP]]
| [https://web.archive.org/web/20180718071209/http://php.net/manual/en/reference.pcre.pattern.syntax.php PHP.net]
| {{free|[[PHP License]]}}
| style="text-align: left;" | Has two implementations, with PCRE being the more efficient in speed, functions
|-
! {{Rh}} | [[Python (programming language)|Python]]
| [https://web.archive.org/web/20180627090508/https://docs.python.org/2/library/re.html python.org]
| {{free|[[Python Software Foundation License]]}}
| style="text-align: left;" | Python has two major implementations, the built in [https://web.archive.org/web/20180718132241/https://docs.python.org/3/library/re.html re] and the [https://web.archive.org/web/20180316120114/https://pypi.python.org/pypi/regex regex] library.
|-
! {{Rh}} | [[Ruby (programming language)|Ruby]]
| [https://web.archive.org/web/20121222034535/http://www.ruby-doc.org/docs/ProgrammingRuby/html/ref_c_regexp.html ruby-doc.org]
| {{free|[[GNU Library General Public License]]}}
| style="text-align: left;" | Ruby 1.8 and 1.9 use different engines; 1.9 integrates Oniguruma.
|-
! {{Rh}} | [[एबीएपी|SAP ABAP]]
| [http://www.sap.com SAP.com]
| {{proprietary}}
| style="text-align: left;" | 
|-
! {{Rh}} | [[Tcl]]
| [https://web.archive.org/web/20180714073730/http://www.tcl.tk/ tcl.tk]
| {{free|[http://www.tcl.tk/software/tcltk/license.html Tcl/Tk License]<br>(BSD-style)}}
| style="text-align: left;" | Tcl library doubles as a regular expression library.
|-
! {{Rh}} | [[ActionScript]] 3
| [https://web.archive.org/web/20181004032835/https://www.adobe.com/devnet/actionscript.html ActionScript Technology Center]
| {{free}}
| style="text-align: left;" | 
|-
! {{Rh}} | [[Wolfram Language]]
| [https://web.archive.org/web/20180715081948/http://www.wolfram.com/language/ Wolfram Research]
| [[अमुक्त स्रोत|Proprietary]]; usable for free on a limited scale on the Wolfram Development platform.
| style="text-align: left;" |{{Clear}}
|}
{{Reflist|group=Note|refs=
<ref name=boost_mars>{{Cite web |url=http://www.digitalmars.com/d/2.0/phobos/std_regex.html |title=संग्रहीत प्रति |access-date=15 जुलाई 2018 |archive-url=https://web.archive.org/web/20180402220607/https://digitalmars.com/d/2.0/phobos/std_regex.html |archive-date=2 अप्रैल 2018 |url-status=dead }}</ref>
<ref name=dotnet_regex_license>https://github.com/dotnet/corefx/blob/7116584186f8f3a886616aaf8cb5d4a982c60e27/src/System.Text.RegularExpressions/src/System/Text/RegularExpressions/Regex.cs#L2</ref>
<ref name=dotnet_license>{{Cite web |url=https://github.com/dotnet/corefx#license |title=संग्रहीत प्रति |access-date=15 जुलाई 2018 |archive-url=https://web.archive.org/web/20180703033444/https://github.com/dotnet/corefx#license |archive-date=3 जुलाई 2018 |url-status=live }}</ref>
}}

==भाषाओं के प्रमुख विशेषताएँ==
'''NOTE:''' An application using a library for regular expression support does not necessarily offer the full set of features of the library, e.g. GNU grep which uses PCRE does not offer lookahead support, though PCRE does.

===भाग 1===
{| class="wikitable sortable" style="text-align: center; font-size: 85%; width: auto; table-layout: fixed;"
|+ Language feature comparison (part 1)
|-
! style="width: 12em" |
! "+" quantifier
! Negated character classes
! Non-greedy quantifiers{{R|group=Note|non_greedy}}
! Shy groups{{R|group=Note|shy}}
! Recursion
! Look-ahead
! Look-behind
! Backreferences{{R|group=Note|backref}}
! >9 indexable captures
|-
| {{Rh}} | [[Boost.Regex]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}{{R|group=Note|boost_regex_recursion}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Boost.Xpressive]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}{{R|group=Note|xpressive_recursion}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[CL-PPCRE]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[EmEditor]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
|-
| {{Rh}} | FREJ
| {{No}}{{R|group=Note|frej_non_greedy}}
| {{No}}
| {{Some}}{{R|group=Note|frej_non_greedy}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[GLib]]/GRegex
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Grep|GNU grep]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{dunno}}
|-
| {{Rh}} | [[Haskell (programming language)|Haskell]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [https://web.archive.org/web/20180826173547/http://titan-ic.com/products/helios-rxpf Helios RXPF]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[International Components for Unicode|ICU]] Regex
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Java (programming language)|Java]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[JavaScript]] ([[ECMAScript]])
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Just Great Software|JGsoft]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Lua (programming language)|Lua]]
| {{yes}}
| {{yes}}
| {{Some}}{{R|group=Note|lua_non_greedy}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{yes}}
| {{no}}
|-
! {{Rh}} | [[.NET framework|.NET]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[OCaml]]
| {{yes}}
| {{yes}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{yes}}
| {{no}}
|-
| {{Rh}} | [[OmniOutliner]] 3.6.2
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{dunno}}
| {{dunno}}
|-
| {{Rh}} | [[Perl Compatible Regular Expression|PCRE]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Perl]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[पीएचपी|PHP]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Python (programming language)|Python]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}{{R|group=Note|python_regex_only2}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Qt (toolkit)|Qt]]/QRegExp
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[R (programming language)|R]]{{R|group=Note|r_regex}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[RE2 (software)|RE2]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{yes}}
|-
| {{Rh}} | [[Ruby (programming language)|Ruby]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[TRE (computing)|TRE]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{yes}}
| {{No}}
|-
| {{Rh}} | [[Vim (text editor)|Vim]] {{Latest preview release/Vim}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
|-
| {{Rh}} | RGX
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[Tcl]] 
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{no}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | TRegExpr
| {{yes}}
| {{dunno}}
| {{yes}}
| {{dunno}}
| {{dunno}}
| {{dunno}}
| {{dunno}}
| {{dunno}}
| {{dunno}}
|-
| {{Rh}} | XRegExp
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{no}}
| {{yes}}
| {{no}}
| {{yes}}
| {{yes}}
|}
{{Reflist|group=Note|refs=
<ref name=non_greedy>''Non-greedy'' quantifiers match as few characters as possible, instead of the default as many. Note that many older, pre-[[POSIX]] engines were non-greedy and didn't have greedy quantifiers at all.</ref>
<ref name=shy>''Shy groups'', also called ''non-capturing'' groups cannot be referred to with backreferences; non-capturing groups are used to speed up matching where the group's content does not need to be accessed later.</ref>
<ref name=backref>''Backreferences'' enable referring to previously matched groups in later parts of the regex and/or replacement string (where applicable). For instance, ''([ab]+)\1'' matches "abab" but not "abaab".</ref>
<ref name=xpressive_recursion>{{Cite web |url=http://www.boost.org/doc/libs/1_47_0/doc/html/xpressive/user_s_guide.html#boost_xpressive.user_s_guide.grammars_and_nested_matches.embedding_a_regex_by_reference |title=संग्रहीत प्रति |access-date=15 जुलाई 2018 |archive-url=https://web.archive.org/web/20170716014956/http://www.boost.org/doc/libs/1_47_0/doc/html/xpressive/user_s_guide.html#boost_xpressive.user_s_guide.grammars_and_nested_matches.embedding_a_regex_by_reference |archive-date=16 जुलाई 2017 |url-status=dead }}</ref>
<ref name=boost_regex_recursion>{{Cite web |url=http://www.boost.org/doc/libs/1_47_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html#boost_regex.syntax.perl_syntax.recursive_expressions |title=संग्रहीत प्रति |access-date=15 जुलाई 2018 |archive-url=https://web.archive.org/web/20180325110337/http://www.boost.org/doc/libs/1_47_0/libs/regex/doc/html/boost_regex/syntax/perl_syntax.html#boost_regex.syntax.perl_syntax.recursive_expressions |archive-date=25 मार्च 2018 |url-status=dead }}</ref>
<ref name=frej_non_greedy>FREJ have no repetitive quantifiers, but have "optional" element which behaves similar to simple "?" quantifier.</ref>
<ref name=r_regex>{{Cite web |url=http://stat.ethz.ch/R-manual/R-patched/library/base/html/regex.html |title=Regular Expressions as used in R |access-date=15 जुलाई 2018 |archive-url=https://web.archive.org/web/20180704141835/http://stat.ethz.ch/R-manual/R-patched/library/base/html/regex.html |archive-date=4 जुलाई 2018 |url-status=dead }}</ref>
<ref name=lua_non_greedy>Lua's only non-greedy quantifier is <code>-</code>, which is a non-greedy version of <code>*</code>. It does not have non-greedy versions of <code>+</code> or <code>?</code>; in the former case, the non-greedy effect can be achieved by repeating the token followed by <code>-</code>, but in the latter case, there is no equivalent.</ref>
<ref name="python_regex_only2">Supported by the optional [https://pypi.python.org/pypi/regex regex] {{Webarchive|url=https://web.archive.org/web/20180316120114/https://pypi.python.org/pypi/regex |date=16 मार्च 2018 }} library only.</ref>
}}

===भाग 2===
{| class="wikitable sortable" style="text-align: center; font-size: 85%; width: auto; table-layout: fixed;"
|+ Language feature comparison (part 2)
|-
! style="width: 12em" |
! Directives{{R|group=Note|directives_explanation}}
! Conditionals
! Atomic groups{{R|group=Note|atomic_grouping_explanation}}
! Named capture{{R|group=Note|named_groups_explanation}}
! Comments
! Embedded code
! [[यूनिकोड|Unicode]] property support <ref>{{Cite web |url=https://www.unicode.org/reports/tr18/ |title=संग्रहीत प्रति |access-date=15 जुलाई 2018 |archive-url=https://web.archive.org/web/20180717133150/http://www.unicode.org/reports/tr18/ |archive-date=17 जुलाई 2018 |url-status=live }}</ref>
! Balancing groups{{R|group=Note|balancing_groups_explanation}}
! Variable-length look-behinds{{R|group=Note|varlength_lookbehind_explanation}}
|-
| {{Rh}} | [[Boost.Regex]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{Some}}{{R|group=Note|properties_limited}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Boost.Xpressive]]
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[CL-PPCRE]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{Some}}{{R|group=Note|properties_limited}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[EmEditor]]
| {{yes}}
| {{yes}}
| {{dunno}}
| {{dunno}}
| {{yes}}
| {{No}}
| {{dunno}}
| {{No}}
| {{No}}
|-
| {{Rh}} | FREJ
| {{No}}
| {{No}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{dunno}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[GLib]]/GRegex
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{Some}}{{R|group=Note|properties_limited}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Grep|GNU grep]]
| {{yes}}
| {{yes}}
| {{dunno}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Haskell (programming language)|Haskell]]
| {{dunno}}
| {{dunno}}
| {{dunno}}
| {{dunno}}
| {{dunno}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [https://web.archive.org/web/20180826173547/http://titan-ic.com/products/helios-rxpf Helios RXPF]
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[International Components for Unicode|ICU]] Regex
| {{yes}}
| {{no}}
| {{yes}}
| {{yes}}{{R|group=Note|available_icu_55}}
| {{yes}}
| {{No}}
| {{yes}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Java (programming language)|Java]]
| {{yes}}
| {{no}}
| {{yes}}
| {{yes}}{{R|group=Note|available_java_7}}
| {{yes}}
| {{No}}
| {{Some}}{{R|group=Note|properties_limited}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[JavaScript]] ([[ECMAScript]])
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Just Great Software|JGsoft]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{Some}}{{R|group=Note|properties_limited}}
| {{No}}
| {{Yes}}
|-
| {{Rh}} | [[Lua (programming language)|Lua]]
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[.NET framework|.NET]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{Some}}{{R|group=Note|properties_limited}}
| {{yes}}
| {{yes}}
|-
| {{Rh}} | [[OCaml]]
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{no}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[OmniOutliner]] 3.6.2
| {{dunno}}
| {{dunno}}
| {{dunno}}
| {{dunno}}
| {{No}}
| {{No}}
| {{dunno}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Perl Compatible Regular Expression|PCRE]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}} 
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Perl]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[पीएचपी|PHP]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Python (programming language)|Python]]
| {{yes}}
| {{yes}}
| {{yes}}{{R|group=Note|python_regex_only2}}
| {{yes}}
| {{yes}}
| {{No}}
| {{yes}}{{R|group=Note|python3_regex_only}}
| {{No}}
| {{yes}}{{R|group=Note|python_regex_only2}}
|-
| {{Rh}} | [[Qt (toolkit)|Qt]]/QRegExp
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[RE2 (software)|RE2]]
| {{yes}}
| {{No}}
| ?
| {{yes}}
| {{No}}
| {{No}}
| {{Some}}{{R|group=Note|properties_limited}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Ruby (programming language)|Ruby]]
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{Some}}{{R|group=Note|properties_limited}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Tcl]]
| {{yes}}
| {{No}}
| {{yes}}
| {{no}}
| {{yes}}
| {{no}}
| {{yes}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[TRE (computing)|TRE]]
| {{yes}}
| {{No}}
| {{No}}
| {{No}}
| {{yes}}
| {{No}}
| {{dunno}}
| {{No}}
| {{No}}
|-
| {{Rh}} | [[Vim (text editor)|Vim]] 
| {{yes}}
| {{no}}
| {{yes}}
| {{no}}
| {{no}}
| {{No}}
| {{no}}
| {{No}}
| {{yes}}
|-
| {{Rh}} | RGX
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{no}}
| {{yes}}
| {{No}}
| {{No}}
|-
| {{Rh}} | XRegExp
| Leading only
| {{no}}
| {{no}}
| {{yes}}
| {{yes}}
| {{no}}
| {{yes}}
| {{No}}
| {{No}}
|}
{{Reflist|group=Note|refs=
<ref name=directives_explanation>Also known as ''Flags modifiers'' or ''Option letters''. Example pattern: "(?i:test)".</ref>
<ref name=atomic_grouping_explanation>Also called ''Independent sub-expressions''</ref>
<ref name=named_groups_explanation>Similar to back references but with names instead of indices</ref>
<ref name=available_java_7>Available as of JDK7</ref>
<ref name=available_icu_55>Available as of ICU55</ref>
<ref name=properties_limited>Unicode property support may be incomplete (products are continuously updated!).  '''All will be incomplete''' when a new Unicode 
revision is released ''until'' they are updated to comply.</ref>
<ref name="balancing_groups_explanation">Special feature allowing to match balanced constructs without recursion</ref>
<ref name="varlength_lookbehind_explanation">Refers to the possibility of including quantifiers in look-behinds, thus making their length unpredictable</ref>
<ref name="python_regex_only2">Supported by the optional [https://pypi.python.org/pypi/regex regex] library only.</ref>
<ref name="python3_regex_only">May only be available in the regex library when used with Python versions after 3.3</ref>
}}

==API की विशेषताएँ==
{| class="wikitable sortable" style="text-align: center; font-size: 85%; width: auto; table-layout: fixed;"
|+ API feature comparison
|-
! style="width: 12em" |
! Native [[UTF-16]] support{{R|group=Note|unicode_native}}
! Native [[UTF-8]] support{{R|group=Note|unicode_native}} 
! Multi-line matching
! Partial match{{R|group=Note|partial_match_explanation}}
|-
! {{Rh}} | [[Boost.Regex]]
| {{No}}
| {{No}}
| {{yes}}
| {{yes}}
|-
! {{Rh}} | [[GLib]]/GRegex
| {{yes}}
| {{yes}} 
| {{yes}}
| {{yes}}
|-
! {{Rh}} | [https://web.archive.org/web/20180826173547/http://titan-ic.com/products/helios-rxpf Helios RXPF]
| {{yes}}
| {{yes}} 
| {{No}}
| {{yes}}
|-
! {{Rh}} | [[International Components for Unicode|ICU]] Regex
| {{yes}}
| {{No}}
| {{yes}} 
| {{dunno}}
|-
! {{Rh}} | [[Java (programming language)|Java]]
| {{No}}
| {{Partial}}{{R|group=Note|Partial_Uni4}}
| {{yes}}
| {{yes}}
|-
! {{Rh}} | [[.NET framework|.NET]]
| {{No}}{{R|group=Note|UCS2}}
| {{yes}}
| {{yes}}
| {{dunno}}
|-
! {{Rh}} | [[Perl Compatible Regular Expression|PCRE]]
| {{Yes}}{{R|group=Note|8.30}}
| {{yes}}
| {{yes}}
| {{yes}}
|-
! {{Rh}} | [[Qt (toolkit)|Qt]]/QRegExp
| {{yes}}
| {{No}}
| {{No}}
| {{dunno}}
|-
! {{Rh}} | [[Tcl]]
| {{Yes}}
| {{Yes}}{{R|group=Note|Conversion}}
| {{Yes}}
| {{dunno}}
|-
! {{Rh}} | [[TRE (computing)|TRE]]
| {{No}}
| {{dunno}}
| {{yes}}
| {{dunno}}
|-
! {{Rh}} | RGX
| {{No}}
| {{No}}
| {{yes}}
| {{dunno}}
|-
! {{Rh}} | [[WxWidgets|wxWdigets]]::[https://web.archive.org/web/20180709110833/http://docs.wxwidgets.org/3.0/classwx_reg_ex.html wxRegEx]{{R|group=Note|wxRegEx}}
| {{yes}}
| {{yes}}
| {{yes}}
| {{dunno}}
|-
! {{Rh}} | XRegExp
| {{yes}}
| {{dunno}}
| {{yes}}
| {{dunno}}
|}
{{Reflist|group=Note|refs=
<ref name="UCS2">Implementation uses original [[UCS-2]] support/features, so it only recognizes 64K chars total (vs [[UTF-16]]'s 1,112,064 characters).  A Microsoft developer-representative answered a bug report on this as "will not fix" in 2010.[http://connect.microsoft.com/VisualStudio/feedback/details/357780/extend-regex-to-process-unicode-characters-not-utf-16-code-units].</ref>
<ref name="unicode_native">Means the format can be used internally without explicit conversion.</ref>
<ref name="Partial_Uni4">Supports Unicode 4.0 standard from 2003; latest plans for JDK7 include Unicode 6.0 (2011) support.[http://openjdk.java.net/projects/jdk7/features/#f497]</ref>
<ref name="8.30">Since version 8.30</ref>
<ref name="Conversion">Tcl includes facilities to convert to and from UTF-8.</ref>
<ref name=partial_match_explanation>Partial match of the whole regular expression. For example the pattern ".*END$" will match any string partially, but only strings ending with END fully.[http://www.boost.org/doc/libs/1_34_1/libs/regex/doc/partial_matches.html]</ref>
<ref name="wxRegEx">wxRegEx uses any system supplied [[POSIX]] library or if not available and for Unicode mode uses [[Henry Spencer]]'s library.</ref>
}}

==इन्हें भी देखें==
* [[रेग्युलर इक्सप्रेशन]]

==सन्दर्ह==
{{Reflist}}

==बाहरी कड़ियाँ==
* [https://web.archive.org/web/20180527102737/http://www.regular-expressions.info/refflavors.html Regular Expression Flavor Comparison] — Detailed comparison of the most popular regular expression flavors
* [https://web.archive.org/web/20120207030145/http://www.greenend.org.uk/rjk/2002/06/regexp.html Regexp Syntax Summary]
* [https://web.archive.org/web/20180710133210/http://www.regexplanet.com/ Online Regular Expression Testing] — with support for Java, JavaScript, .Net, PHP, Python and Ruby
* [https://web.archive.org/web/20180917000401/https://swtch.com/~rsc/regexp/ Implementing Regular Expressions] — series of articles by Russ Cox, author of [[RE2 (software)|RE2]]
* [https://web.archive.org/web/20180713231038/http://softec.lu/site/RegularExpressions/RegularExpressionEngines Regular Expression Engines]

[[Category:पैटर्न खोज]]
[[Category:रेग्युलर इक्सप्रेशन]]