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cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" > Menu prinċipali </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Menu prinċipali</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">mexxi għall-ġenb</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">aħbi</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigazzjoni </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-text" class="mw-list-item"><a href="/wiki/Il-Pa%C4%A1na_prin%C4%8Bipali">Paġna prinċipali</a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikizzjunarju:Portal_tal-komunit%C3%A0" title="Dwar il-proġett, x'tista' tagħmel, fejn tista' ssib l-affarijiet">Portal tal-komunità</a></li><li id="n-Pjazza" class="mw-list-item"><a href="/wiki/Wikizzjunarju:Pjazza">Pjazza</a></li><li id="n-requestedarticles" class="mw-list-item"><a href="/wiki/Wikizzjunarju:Artikli_rikjesti">Artikli rikjesti</a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Spe%C4%8Bjali:TibdilRi%C4%8Benti" title="Lista tal-bidliet riċenti fil-wiki [r]" accesskey="r">Bidliet riċenti</a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Spe%C4%8Bjali:Pa%C4%A1naKwalunkwe" title="Uri paġna kwalunkwe [x]" accesskey="x">Paġna kwalunkwe</a></li><li id="n-help" class="mw-list-item"><a href="https://www.mediawiki.org/wiki/Special:MyLanguage/Help:Contents" title="Il-post fejn issir taf iżjed.">Għajnuna</a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Il-Pa%C4%A1na_prin%C4%8Bipali" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wiktionary.svg" alt="" aria-hidden="true" height="50" width="50"> <img class="mw-logo-wordmark" alt="Wikizzjunarju" src="/static/images/mobile/copyright/wiktionary-wordmark-mt.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="" src="/static/images/mobile/copyright/wiktionary-tagline-mt.svg" width="121" height="12" style="width: 7.5625em; height: 0.75em;"> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Spe%C4%8Bjali:Fittex" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Fittex fis-sit: Wikizzjunarju [f]" accesskey="f"> Fittex </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Fittex fis-sit: Wikizzjunarju" aria-label="Fittex fis-sit: Wikizzjunarju" autocapitalize="none" title="Fittex fis-sit: Wikizzjunarju [f]" accesskey="f" id="searchInput" > </div> <input type="hidden" name="title" value="Speċjali:Fittex"> </div> <button class="cdx-button cdx-search-input__end-button">Fittex</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Għodda personali"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Dehra"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Dehra" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" > Dehra </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_mt.wiktionary.org&uselang=mt" class="">Donazzjonijiet</a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Spe%C4%8Bjali:O%C4%A7loqKont&returnto=Module%3Aparser" title="Nagħtuk parir toħloq kont u tidħol fih; però dan mhux obligatorju." class="">Oħloq kont</a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Spe%C4%8Bjali:UtentD%C4%A7ul&returnto=Module%3Aparser" title="Inħeġġuk tidħol fil-kont tiegħek, għalkemm dan mhux obbligatorju [o]" accesskey="o" class="">Idħol</a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Aktar għażliet" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Għodda personali" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" > Għodda personali </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_mt.wiktionary.org&uselang=mt">Donazzjonijiet</a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Spe%C4%8Bjali:O%C4%A7loqKont&returnto=Module%3Aparser" title="Nagħtuk parir toħloq kont u tidħol fih; però dan mhux obligatorju."> Oħloq kont</a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Spe%C4%8Bjali:UtentD%C4%A7ul&returnto=Module%3Aparser" title="Inħeġġuk tidħol fil-kont tiegħek, għalkemm dan mhux obbligatorju [o]" accesskey="o"> Idħol</a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Il-paġni għal edituri anonimi <a href="/wiki/G%C4%A7ajnuna:Introduction" aria-label="Tgħallem iktar dwar kif timmodifika">kun af aktar</a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Spe%C4%8Bjali:KontribuzzjonijietTieg%C4%A7i" title="A list of edits made from this IP address [y]" accesskey="y">Kontribuzzjonijiet</a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Spe%C4%8Bjali:DiskussjonijietTieg%C4%A7i" title="Diskussjoni dwar il-modifiki magħmula minn dan l-indirizz tal-IP [n]" accesskey="n">Diskussjoni</a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Sit"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <h1 id="firstHeading" class="firstHeading mw-first-heading">Module:parser</h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Żur artiklu f'lingwa differenti. Disponibbli fi 18 lingwi" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-18" aria-hidden="true" > 18 lingwi </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wiktionary.org/wiki/%D9%88%D8%AD%D8%AF%D8%A9:parser" title="وحدة:parser – Għarbi" lang="ar" hreflang="ar" data-title="وحدة:parser" data-language-autonym="العربية" data-language-local-name="Għarbi" class="interlanguage-link-target">العربية</a></li><li class="interlanguage-link interwiki-bjn mw-list-item"><a href="https://bjn.wiktionary.org/wiki/Modul:parser" title="Modul:parser – Banjar" lang="bjn" hreflang="bjn" data-title="Modul:parser" data-language-autonym="Banjar" data-language-local-name="Banjar" class="interlanguage-link-target">Banjar</a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wiktionary.org/wiki/%E0%A6%AE%E0%A6%A1%E0%A6%BF%E0%A6%89%E0%A6%B2:parser" title="মডিউল:parser – Bengali" lang="bn" hreflang="bn" data-title="মডিউল:parser" data-language-autonym="বাংলা" data-language-local-name="Bengali" class="interlanguage-link-target">বাংলা</a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wiktionary.org/wiki/%D9%85%DB%86%D8%AF%DB%8C%D9%88%D9%88%D9%84:parser" title="مۆدیوول:parser – Kurd Ċentrali" lang="ckb" hreflang="ckb" data-title="مۆدیوول:parser" data-language-autonym="کوردی" data-language-local-name="Kurd Ċentrali" class="interlanguage-link-target">کوردی</a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wiktionary.org/wiki/Module:parser" title="Module:parser – Ingliż" lang="en" hreflang="en" data-title="Module:parser" data-language-autonym="English" data-language-local-name="Ingliż" class="interlanguage-link-target">English</a></li><li class="interlanguage-link interwiki-hsb mw-list-item"><a href="https://hsb.wiktionary.org/wiki/Modul:parser" title="Modul:parser – Sorbjan ta’ Fuq" lang="hsb" hreflang="hsb" data-title="Modul:parser" data-language-autonym="Hornjoserbsce" data-language-local-name="Sorbjan ta’ Fuq" class="interlanguage-link-target">Hornjoserbsce</a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wiktionary.org/wiki/%E3%83%A2%E3%82%B8%E3%83%A5%E3%83%BC%E3%83%AB:parser" title="モジュール:parser – Ġappuniż" lang="ja" hreflang="ja" data-title="モジュール:parser" data-language-autonym="日本語" data-language-local-name="Ġappuniż" class="interlanguage-link-target">日本語</a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wiktionary.org/wiki/%D0%9C%D0%BE%D0%B4%D1%83%D0%BB%D1%8C:parser" title="Модуль:parser – Kirgiż" lang="ky" hreflang="ky" data-title="Модуль:parser" data-language-autonym="Кыргызча" data-language-local-name="Kirgiż" class="interlanguage-link-target">Кыргызча</a></li><li class="interlanguage-link interwiki-mnw mw-list-item"><a href="https://mnw.wiktionary.org/wiki/%E1%80%99%E1%80%9D%E1%80%BA%E1%80%82%E1%80%BB%E1%80%B0:parser" title="မဝ်ဂျူ:parser – Mon" lang="mnw" hreflang="mnw" data-title="မဝ်ဂျူ:parser" data-language-autonym="ဘာသာမန်" data-language-local-name="Mon" class="interlanguage-link-target">ဘာသာမန်</a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wiktionary.org/wiki/Modul:parser" title="Modul:parser – Malay" lang="ms" hreflang="ms" data-title="Modul:parser" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target">Bahasa Melayu</a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wiktionary.org/wiki/%E1%80%99%E1%80%B1%E1%80%AC%E1%80%BA%E1%80%82%E1%80%BB%E1%80%B0%E1%80%B8:parser" title="မော်ဂျူး:parser – Burmiż" lang="my" hreflang="my" data-title="မော်ဂျူး:parser" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmiż" class="interlanguage-link-target">မြန်မာဘာသာ</a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wiktionary.org/wiki/%E0%A8%AE%E0%A9%8C%E0%A8%A1%E0%A8%BF%E0%A8%8A%E0%A8%B2:parser" title="ਮੌਡਿਊਲ:parser – Punjabi" lang="pa" hreflang="pa" data-title="ਮੌਡਿਊਲ:parser" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target">ਪੰਜਾਬੀ</a></li><li class="interlanguage-link interwiki-shn mw-list-item"><a href="https://shn.wiktionary.org/wiki/%E1%80%99%E1%80%B1%E1%82%83%E1%82%87%E1%81%B5%E1%80%BB%E1%80%B0%E1%80%B8:parser" title="မေႃႇၵျူး:parser – Shan" lang="shn" hreflang="shn" data-title="မေႃႇၵျူး:parser" data-language-autonym="ၽႃႇသႃႇတႆး " data-language-local-name="Shan" class="interlanguage-link-target">ၽႃႇသႃႇတႆး </a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wiktionary.org/wiki/Module:parser" title="Module:parser – Sinhala" lang="si" hreflang="si" data-title="Module:parser" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target">සිංහල</a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wiktionary.org/wiki/%D0%9C%D0%BE%D0%B4%D1%83%D0%BB:parser" title="Модул:parser – Serb" lang="sr" hreflang="sr" data-title="Модул:parser" data-language-autonym="Српски / srpski" data-language-local-name="Serb" class="interlanguage-link-target">Српски / srpski</a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wiktionary.org/wiki/%E0%B8%A1%E0%B8%AD%E0%B8%94%E0%B8%B9%E0%B8%A5:parser" title="มอดูล:parser – Tajlandiż" lang="th" hreflang="th" data-title="มอดูล:parser" data-language-autonym="ไทย" data-language-local-name="Tajlandiż" class="interlanguage-link-target">ไทย</a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a 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class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Dehra</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mexxi għall-ġenb</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">aħbi</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Minn Wikizzjunarju</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="mt" dir="ltr">Documentation for this module may be created at <a href="/w/index.php?title=Module:parser/doc&action=edit&redlink=1" class="new" title="Module:parser/doc (il-paġna ma teżistix)">Module:parser/doc</a> <div class="mw-highlight mw-highlight-lang-lua mw-content-ltr mw-highlight-lines" dir="ltr"><pre><a href="#L-1"></a>local export = {} <a href="#L-2"></a> <a href="#L-3"></a>local concat = table.concat <a href="#L-4"></a>local deepcopy -- Assigned when needed. <a href="#L-5"></a>local getmetatable = getmetatable <a href="#L-6"></a>local insert = table.insert <a href="#L-7"></a>local next = next <a href="#L-8"></a>local rawget = rawget <a href="#L-9"></a>local rawset = rawset <a href="#L-10"></a>local remove = table.remove <a href="#L-11"></a>local setmetatable = setmetatable <a href="#L-12"></a>local type = type <a href="#L-13"></a>local unpack = unpack <a href="#L-14"></a> <a href="#L-15"></a>local classes = {} <a href="#L-16"></a>local metamethods = mw.loadData("Module:data/metamethods") <a href="#L-17"></a> <a href="#L-18"></a>------------------------------------------------------------------------------------ <a href="#L-19"></a>-- <a href="#L-20"></a>-- Helper functions <a href="#L-21"></a>-- <a href="#L-22"></a>------------------------------------------------------------------------------------ <a href="#L-23"></a> <a href="#L-24"></a>local function get_nested(t, k, ...) <a href="#L-25"></a> if t == nil then <a href="#L-26"></a> return nil <a href="#L-27"></a> elseif ... == nil then <a href="#L-28"></a> return t[k] <a href="#L-29"></a> end <a href="#L-30"></a> return get_nested(t[k], ...) <a href="#L-31"></a>end <a href="#L-32"></a> <a href="#L-33"></a>local function set_nested(t, k, v, ...) <a href="#L-34"></a> if ... ~= nil then <a href="#L-35"></a> local t_next = t[k] <a href="#L-36"></a> if t_next == nil then <a href="#L-37"></a> t_next = {} <a href="#L-38"></a> t[k] = t_next <a href="#L-39"></a> end <a href="#L-40"></a> return set_nested(t_next, v, ...) <a href="#L-41"></a> end <a href="#L-42"></a> t[k] = v <a href="#L-43"></a>end <a href="#L-44"></a> <a href="#L-45"></a>local function inherit_metamethods(child, parent) <a href="#L-46"></a> if parent then <a href="#L-47"></a> for method, value in next, parent do <a href="#L-48"></a> if child[method] == nil and metamethods[method] ~= nil then <a href="#L-49"></a> child[method] = value <a href="#L-50"></a> end <a href="#L-51"></a> end <a href="#L-52"></a> end <a href="#L-53"></a> return child <a href="#L-54"></a>end <a href="#L-55"></a> <a href="#L-56"></a>local function signed_index(t, n) <a href="#L-57"></a> return n and n <= 0 and #t + 1 + n or n <a href="#L-58"></a>end <a href="#L-59"></a> <a href="#L-60"></a>local function is_node(value) <a href="#L-61"></a> return classes[getmetatable(value)] ~= nil <a href="#L-62"></a>end <a href="#L-63"></a> <a href="#L-64"></a>-- Recursively calling tostring() adds to the C stack (limit: 200), whereas <a href="#L-65"></a>-- calling __tostring metamethods directly does not. Occasionally relevant when <a href="#L-66"></a>-- dealing with very deep nesting. <a href="#L-67"></a>local tostring <a href="#L-68"></a>do <a href="#L-69"></a> local _tostring = _G.tostring <a href="#L-70"></a> <a href="#L-71"></a> function tostring(value) <a href="#L-72"></a> if is_node(value) then <a href="#L-73"></a> return value:__tostring(value) <a href="#L-74"></a> end <a href="#L-75"></a> return _tostring(value) <a href="#L-76"></a> end <a href="#L-77"></a>end <a href="#L-78"></a> <a href="#L-79"></a>local function class_else_type(value) <a href="#L-80"></a> local class = classes[getmetatable(value)] <a href="#L-81"></a> if class ~= nil then <a href="#L-82"></a> return class <a href="#L-83"></a> end <a href="#L-84"></a> return type(value) <a href="#L-85"></a>end <a href="#L-86"></a> <a href="#L-87"></a>------------------------------------------------------------------------------------ <a href="#L-88"></a>-- <a href="#L-89"></a>-- Nodes <a href="#L-90"></a>-- <a href="#L-91"></a>------------------------------------------------------------------------------------ <a href="#L-92"></a> <a href="#L-93"></a>local Node = {} <a href="#L-94"></a>Node.__index = Node <a href="#L-95"></a> <a href="#L-96"></a>function Node:next(i) <a href="#L-97"></a> i = i + 1 <a href="#L-98"></a> return self[i], self, i <a href="#L-99"></a>end <a href="#L-100"></a> <a href="#L-101"></a>function Node:next_node(i) <a href="#L-102"></a> local v <a href="#L-103"></a> repeat <a href="#L-104"></a> v, self, i = self:next(i) <a href="#L-105"></a> until v == nil or is_node(v) <a href="#L-106"></a> return v, self, i <a href="#L-107"></a>end <a href="#L-108"></a> <a href="#L-109"></a>-- Implements recursive iteration over a node tree, using functors to maintain state (which uses a lot less memory than closures). Iterator1 exists only to return the calling node on the first iteration, while Iterator2 uses a stack to store the state of each layer in the tree. <a href="#L-110"></a> <a href="#L-111"></a>-- When a node is encountered (which may contain other nodes), it is returned on the first iteration, and then any child nodes are returned on each subsequent iteration; the same process is followed if any of those children contain nodes themselves. Once a particular node has been fully traversed, the iterator moves back up one layer and continues with any sibling nodes. <a href="#L-112"></a> <a href="#L-113"></a>-- Each iteration returns three values: `value`, `node` and `key`. Together, these can be used to manipulate the node tree at any given point without needing to know the full structure. Note that when the input node is returned on the first iteration, `node` and `key` will be nil. <a href="#L-114"></a> <a href="#L-115"></a>-- By default, the iterator will use the `next` method of each node, but this can be changed with the `next_func` parameter, which accepts a string argument with the name of a next method. This is because trees might consist of several different classes of node, and each might have different next methods that are tailored to their particular structures. In addition, each class of node might have multiple different next methods, which can be named according to their purposes. `next_func` ensures that the iterator uses equivalent next methods between different types of node. <a href="#L-116"></a> <a href="#L-117"></a>-- Currently, two next methods are available: `next`, which simply iterates over the node conventionally, and `next_node`, which only returns children that are themselves nodes. Custom next methods can be declared by any calling module. <a href="#L-118"></a>do <a href="#L-119"></a> local Iterator1, Iterator2 = {}, {} <a href="#L-120"></a> Iterator1.__index = Iterator2 -- Not a typo. <a href="#L-121"></a> Iterator2.__index = Iterator2 <a href="#L-122"></a> <a href="#L-123"></a> function Iterator1:__call() <a href="#L-124"></a> setmetatable(self, Iterator2) <a href="#L-125"></a> return self[1].node <a href="#L-126"></a> end <a href="#L-127"></a> <a href="#L-128"></a> function Iterator2:push(node) <a href="#L-129"></a> local layer = { <a href="#L-130"></a> k = 0, <a href="#L-131"></a> node = node <a href="#L-132"></a> } <a href="#L-133"></a> self[#self + 1] = layer <a href="#L-134"></a> self[-1] = layer <a href="#L-135"></a> return self <a href="#L-136"></a> end <a href="#L-137"></a> <a href="#L-138"></a> function Iterator2:pop() <a href="#L-139"></a> local len = #self <a href="#L-140"></a> self[len] = nil <a href="#L-141"></a> self[-1] = self[len - 1] <a href="#L-142"></a> end <a href="#L-143"></a> <a href="#L-144"></a> function Iterator2:iterate(layer, ...) <a href="#L-145"></a> local v, node, k = ... <a href="#L-146"></a> if v ~= nil then <a href="#L-147"></a> layer.k = k <a href="#L-148"></a> return ... <a href="#L-149"></a> end <a href="#L-150"></a> self:pop() <a href="#L-151"></a> layer = self[-1] <a href="#L-152"></a> if layer ~= nil then <a href="#L-153"></a> node = layer.node <a href="#L-154"></a> return self:iterate(layer, node[self.next_func](node, layer.k)) <a href="#L-155"></a> end <a href="#L-156"></a> end <a href="#L-157"></a> <a href="#L-158"></a> function Iterator2:__call() <a href="#L-159"></a> local layer = self[-1] <a href="#L-160"></a> local node, k = layer.node, layer.k <a href="#L-161"></a> local curr_val = node[k] <a href="#L-162"></a> if is_node(curr_val) then <a href="#L-163"></a> self:push(curr_val) <a href="#L-164"></a> layer = self[-1] <a href="#L-165"></a> node, k = layer.node, layer.k <a href="#L-166"></a> end <a href="#L-167"></a> return self:iterate(layer, node[self.next_func](node, k)) <a href="#L-168"></a> end <a href="#L-169"></a> <a href="#L-170"></a> function Node:__pairs(next_func) <a href="#L-171"></a> return setmetatable({ <a href="#L-172"></a> next_func = next_func == nil and "next" or next_func <a href="#L-173"></a> }, Iterator1):push(self) <a href="#L-174"></a> end <a href="#L-175"></a>end <a href="#L-176"></a> <a href="#L-177"></a>function Node:rawpairs() <a href="#L-178"></a> return next, self <a href="#L-179"></a>end <a href="#L-180"></a> <a href="#L-181"></a>function Node:__tostring() <a href="#L-182"></a> local output = {} <a href="#L-183"></a> for i = 1, #self do <a href="#L-184"></a> insert(output, tostring(self[i])) <a href="#L-185"></a> end <a href="#L-186"></a> return concat(output) <a href="#L-187"></a>end <a href="#L-188"></a> <a href="#L-189"></a>function Node:clone() <a href="#L-190"></a> if not deepcopy then <a href="#L-191"></a> deepcopy = require("Module:table").deepcopy <a href="#L-192"></a> end <a href="#L-193"></a> return deepcopy(self, "keep", true) <a href="#L-194"></a>end <a href="#L-195"></a> <a href="#L-196"></a>function Node:new_class(class) <a href="#L-197"></a> local t = {type = class} <a href="#L-198"></a> t.__index = t <a href="#L-199"></a> t = inherit_metamethods(t, self) <a href="#L-200"></a> classes[t] = class <a href="#L-201"></a> return setmetatable(t, self) <a href="#L-202"></a>end <a href="#L-203"></a> <a href="#L-204"></a>Node.keys_to_remove = {"fail", "handler", "head", "override", "route"} <a href="#L-205"></a> <a href="#L-206"></a>function Node:new(t) <a href="#L-207"></a> setmetatable(t, nil) <a href="#L-208"></a> local keys_to_remove = self.keys_to_remove <a href="#L-209"></a> for i = 1, #keys_to_remove do <a href="#L-210"></a> t[keys_to_remove[i]] = nil <a href="#L-211"></a> end <a href="#L-212"></a> return setmetatable(t, self) <a href="#L-213"></a>end <a href="#L-214"></a> <a href="#L-215"></a>do <a href="#L-216"></a> local Proxy = {} <a href="#L-217"></a> <a href="#L-218"></a> function Proxy:__index(k) <a href="#L-219"></a> local v = Proxy[k] <a href="#L-220"></a> if v ~= nil then <a href="#L-221"></a> return v <a href="#L-222"></a> end <a href="#L-223"></a> return self.__chars[k] <a href="#L-224"></a> end <a href="#L-225"></a> <a href="#L-226"></a> function Proxy:__newindex(k, v) <a href="#L-227"></a> local key = self.__keys[k] <a href="#L-228"></a> if key then <a href="#L-229"></a> self.__chars[k] = v <a href="#L-230"></a> self.__parents[key] = v <a href="#L-231"></a> elseif key == false then <a href="#L-232"></a> error("Character is immutable.") <a href="#L-233"></a> else <a href="#L-234"></a> error("Invalid key.") <a href="#L-235"></a> end <a href="#L-236"></a> end <a href="#L-237"></a> <a href="#L-238"></a> function Proxy:build(a, b, c) <a href="#L-239"></a> local len = self.__len + 1 <a href="#L-240"></a> self.__chars[len] = a <a href="#L-241"></a> self.__parents[len] = b <a href="#L-242"></a> self.__keys[len] = c <a href="#L-243"></a> self.__len = len <a href="#L-244"></a> end <a href="#L-245"></a> <a href="#L-246"></a> function Proxy:iter(i) <a href="#L-247"></a> i = i + 1 <a href="#L-248"></a> local char = self.__chars[i] <a href="#L-249"></a> if char ~= nil then <a href="#L-250"></a> return i, self[i], self, self.__parents[i], self.__keys[i] <a href="#L-251"></a> end <a href="#L-252"></a> end <a href="#L-253"></a> <a href="#L-254"></a> function Node:new_proxy() <a href="#L-255"></a> return setmetatable({ <a href="#L-256"></a> __node = self, <a href="#L-257"></a> __chars = {}, <a href="#L-258"></a> __parents = {}, <a href="#L-259"></a> __keys = {}, <a href="#L-260"></a> __len = 0 <a href="#L-261"></a> }, Proxy) <a href="#L-262"></a> end <a href="#L-263"></a>end <a href="#L-264"></a> <a href="#L-265"></a>------------------------------------------------------------------------------------ <a href="#L-266"></a>-- <a href="#L-267"></a>-- Parser <a href="#L-268"></a>-- <a href="#L-269"></a>------------------------------------------------------------------------------------ <a href="#L-270"></a> <a href="#L-271"></a>local Parser = {} <a href="#L-272"></a>Parser.__index = Parser <a href="#L-273"></a> <a href="#L-274"></a>function Parser:read(delta) <a href="#L-275"></a> local v = self.text[self.head + (delta or 0)] <a href="#L-276"></a> return v == nil and "" or v <a href="#L-277"></a>end <a href="#L-278"></a> <a href="#L-279"></a>function Parser:advance(n) <a href="#L-280"></a> self.head = self.head + (n == nil and 1 or n) <a href="#L-281"></a>end <a href="#L-282"></a> <a href="#L-283"></a>function Parser:layer(n) <a href="#L-284"></a> if n ~= nil then <a href="#L-285"></a> return rawget(self, #self + n) <a href="#L-286"></a> end <a href="#L-287"></a> return self[-1] <a href="#L-288"></a>end <a href="#L-289"></a> <a href="#L-290"></a>function Parser:emit(a, b) <a href="#L-291"></a> local layer = self[-1] <a href="#L-292"></a> if b ~= nil then <a href="#L-293"></a> insert(layer, signed_index(layer, a), b) <a href="#L-294"></a> else <a href="#L-295"></a> rawset(layer, #layer + 1, a) <a href="#L-296"></a> end <a href="#L-297"></a>end <a href="#L-298"></a> <a href="#L-299"></a>function Parser:emit_tokens(a, b) <a href="#L-300"></a> local layer = self[-1] <a href="#L-301"></a> if b ~= nil then <a href="#L-302"></a> a = signed_index(layer, a) <a href="#L-303"></a> for i = 1, #b do <a href="#L-304"></a> insert(layer, a + i - 1, b[i]) <a href="#L-305"></a> end <a href="#L-306"></a> else <a href="#L-307"></a> local len = #layer <a href="#L-308"></a> for i = 1, #a do <a href="#L-309"></a> len = len + 1 <a href="#L-310"></a> rawset(layer, len, a[i]) <a href="#L-311"></a> end <a href="#L-312"></a> end <a href="#L-313"></a>end <a href="#L-314"></a> <a href="#L-315"></a>function Parser:remove(n) <a href="#L-316"></a> local layer = self[-1] <a href="#L-317"></a> if n ~= nil then <a href="#L-318"></a> return remove(layer, signed_index(layer, n)) <a href="#L-319"></a> end <a href="#L-320"></a> local len = #layer <a href="#L-321"></a> local token = layer[len] <a href="#L-322"></a> layer[len] = nil <a href="#L-323"></a> return token <a href="#L-324"></a>end <a href="#L-325"></a> <a href="#L-326"></a>function Parser:replace(a, b) <a href="#L-327"></a> local layer = self[-1] <a href="#L-328"></a> layer[signed_index(layer, a)] = b <a href="#L-329"></a>end <a href="#L-330"></a> <a href="#L-331"></a>-- Unlike default table.concat, this respects __tostring metamethods. <a href="#L-332"></a>function Parser:concat(a, b, c) <a href="#L-333"></a> if a == nil or a > 0 then <a href="#L-334"></a> return self:concat(0, a, b) <a href="#L-335"></a> end <a href="#L-336"></a> local layer, ret, n = self:layer(a), {}, 0 <a href="#L-337"></a> for i = b and signed_index(layer, b) or 1, c and signed_index(layer, c) or #layer do <a href="#L-338"></a> n = n + 1 <a href="#L-339"></a> ret[n] = tostring(layer[i]) <a href="#L-340"></a> end <a href="#L-341"></a> return concat(ret) <a href="#L-342"></a>end <a href="#L-343"></a> <a href="#L-344"></a>function Parser:emitted(delta) <a href="#L-345"></a> if delta == nil then <a href="#L-346"></a> delta = -1 <a href="#L-347"></a> end <a href="#L-348"></a> local i = 0 <a href="#L-349"></a> while true do <a href="#L-350"></a> local layer = self:layer(i) <a href="#L-351"></a> if layer == nil then <a href="#L-352"></a> return nil <a href="#L-353"></a> end <a href="#L-354"></a> local layer_len = #layer <a href="#L-355"></a> if -delta <= layer_len then <a href="#L-356"></a> return rawget(layer, layer_len + delta + 1) <a href="#L-357"></a> end <a href="#L-358"></a> delta = delta + layer_len <a href="#L-359"></a> i = i - 1 <a href="#L-360"></a> end <a href="#L-361"></a>end <a href="#L-362"></a> <a href="#L-363"></a>function Parser:push(route) <a href="#L-364"></a> local layer = { <a href="#L-365"></a> head = self.head, <a href="#L-366"></a> route = route <a href="#L-367"></a> } <a href="#L-368"></a> self[#self + 1] = layer <a href="#L-369"></a> self[-1] = layer <a href="#L-370"></a>end <a href="#L-371"></a> <a href="#L-372"></a>function Parser:push_sublayer(handler, inherit) <a href="#L-373"></a> local sublayer = { <a href="#L-374"></a> handler = handler, <a href="#L-375"></a> sublayer = true <a href="#L-376"></a> } <a href="#L-377"></a> if inherit then <a href="#L-378"></a> local layer = self[-1] <a href="#L-379"></a> setmetatable(sublayer, inherit_metamethods({ <a href="#L-380"></a> __index = layer, <a href="#L-381"></a> __newindex = layer <a href="#L-382"></a> }, getmetatable(layer))) <a href="#L-383"></a> end <a href="#L-384"></a> self[#self + 1] = sublayer <a href="#L-385"></a> self[-1] = sublayer <a href="#L-386"></a>end <a href="#L-387"></a> <a href="#L-388"></a>function Parser:pop() <a href="#L-389"></a> local len, layer = #self <a href="#L-390"></a> while true do <a href="#L-391"></a> layer = self[len] <a href="#L-392"></a> self[len] = nil <a href="#L-393"></a> len = len - 1 <a href="#L-394"></a> local new = self[len] <a href="#L-395"></a> self[-1] = new == nil and self or new <a href="#L-396"></a> if layer.sublayer == nil then <a href="#L-397"></a> break <a href="#L-398"></a> end <a href="#L-399"></a> self:emit_tokens(layer) <a href="#L-400"></a> end <a href="#L-401"></a> return layer <a href="#L-402"></a>end <a href="#L-403"></a> <a href="#L-404"></a>function Parser:pop_sublayer() <a href="#L-405"></a> local len, layer = #self, self[-1] <a href="#L-406"></a> self[len] = nil <a href="#L-407"></a> local new = self[len - 1] <a href="#L-408"></a> self[-1] = new == nil and self or new <a href="#L-409"></a> setmetatable(layer, nil) <a href="#L-410"></a> layer.sublayer = nil <a href="#L-411"></a> return layer <a href="#L-412"></a>end <a href="#L-413"></a> <a href="#L-414"></a>function Parser:get(route, ...) <a href="#L-415"></a> self:push(route) <a href="#L-416"></a> local layer = route(self, ...) <a href="#L-417"></a> if layer == nil then <a href="#L-418"></a> layer = self:traverse() <a href="#L-419"></a> end <a href="#L-420"></a> return layer <a href="#L-421"></a>end <a href="#L-422"></a> <a href="#L-423"></a>function Parser:try(route, ...) <a href="#L-424"></a> local failed_layer = get_nested(self.failed_routes, route, self.head) <a href="#L-425"></a> if failed_layer ~= nil then <a href="#L-426"></a> return false, failed_layer <a href="#L-427"></a> end <a href="#L-428"></a> local layer = self:get(route, ...) <a href="#L-429"></a> return not layer.fail, layer <a href="#L-430"></a>end <a href="#L-431"></a> <a href="#L-432"></a>function Parser:consume(this, ...) <a href="#L-433"></a> local layer = self[-1] <a href="#L-434"></a> if this == nil then <a href="#L-435"></a> this = self:read() <a href="#L-436"></a> end <a href="#L-437"></a> return (layer.override or layer.handler)(self, this, ...) <a href="#L-438"></a>end <a href="#L-439"></a> <a href="#L-440"></a>function Parser:fail_route() <a href="#L-441"></a> local layer = self:pop() <a href="#L-442"></a> layer.fail = true <a href="#L-443"></a> set_nested(self, "failed_routes", layer.route, layer.head, layer) <a href="#L-444"></a> self.head = layer.head <a href="#L-445"></a> return layer <a href="#L-446"></a>end <a href="#L-447"></a> <a href="#L-448"></a>function Parser:traverse() <a href="#L-449"></a> while true do <a href="#L-450"></a> local layer = self:consume() <a href="#L-451"></a> if layer ~= nil then <a href="#L-452"></a> return layer <a href="#L-453"></a> end <a href="#L-454"></a> self:advance() <a href="#L-455"></a> end <a href="#L-456"></a>end <a href="#L-457"></a> <a href="#L-458"></a>-- Converts a handler into a switch table the first time it's called, which avoids creating unnecessary objects, and prevents any scoping issues caused by parser methods being assigned to table keys before they've been declared. <a href="#L-459"></a>-- false is used as the default key. <a href="#L-460"></a>do <a href="#L-461"></a> local Switch = {} <a href="#L-462"></a> <a href="#L-463"></a> function Switch:__call(parser, this) <a href="#L-464"></a> return (self[this] or self[false])(parser, this) <a href="#L-465"></a> end <a href="#L-466"></a> <a href="#L-467"></a> function Parser:switch(func, t) <a href="#L-468"></a> local layer = self[-1] <a href="#L-469"></a> -- Point handler to the new switch table if the calling function is the current handler. <a href="#L-470"></a> if layer.handler == func then <a href="#L-471"></a> layer.handler = t <a href="#L-472"></a> end <a href="#L-473"></a> return setmetatable(t, Switch) <a href="#L-474"></a> end <a href="#L-475"></a>end <a href="#L-476"></a> <a href="#L-477"></a>-- Generate a new parser class object, which is used as the template for any parser objects. These should be customized with additional/modified methods as needed. <a href="#L-478"></a>function Parser:new_class() <a href="#L-479"></a> local t = {} <a href="#L-480"></a> t.__index = t <a href="#L-481"></a> return setmetatable(inherit_metamethods(t, self), self) <a href="#L-482"></a>end <a href="#L-483"></a> <a href="#L-484"></a>-- Generate a new parser object, which is used for a specific parse. <a href="#L-485"></a>function Parser:new(text) <a href="#L-486"></a> return setmetatable({ <a href="#L-487"></a> text = text, <a href="#L-488"></a> head = 1 <a href="#L-489"></a> }, self) <a href="#L-490"></a>end <a href="#L-491"></a> <a href="#L-492"></a>function Parser:parse(data) <a href="#L-493"></a> local parser = self:new(data.text) <a href="#L-494"></a> local success, tokens = parser:try(unpack(data.route)) <a href="#L-495"></a> if #parser > 0 then <a href="#L-496"></a> -- This shouldn't happen. <a href="#L-497"></a> error("Parser exited with non-empty stack.") <a href="#L-498"></a> elseif success then <a href="#L-499"></a> local node = data.node <a href="#L-500"></a> return true, node[1]:new(tokens, unpack(node, 2)), parser <a href="#L-501"></a> elseif data.allow_fail then <a href="#L-502"></a> return false, nil, parser <a href="#L-503"></a> end <a href="#L-504"></a> error("Parser exited with failed route.") <a href="#L-505"></a>end <a href="#L-506"></a> <a href="#L-507"></a>export.class_else_type = class_else_type <a href="#L-508"></a>export.is_node = is_node <a href="#L-509"></a>export.tostring = tostring <a href="#L-510"></a> <a href="#L-511"></a>function export.new() <a href="#L-512"></a> return Parser:new_class(), Node:new_class("node") <a href="#L-513"></a>end <a href="#L-514"></a> <a href="#L-515"></a>return export </pre></div>   </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Miksub minn "<a dir="ltr" href="https://mt.wiktionary.org/w/index.php?title=Module:parser&oldid=20911">https://mt.wiktionary.org/w/index.php?title=Module:parser&oldid=20911</a>"</div></div> <div id="catlinks" class="catlinks catlinks-allhidden" data-mw="interface"></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> L-aħħar bidla fuq il-paġna: 05:26, 23 Novembru 2024.</li> <li id="footer-info-copyright">It-test huwa disponibbli taħt il-<a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/">Liċenzja Creative Commons Attribution-ShareAlike</a>; jistgħu japplikaw xi kundizzjonijiet oħra. 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