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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">模組: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="前往另一种语言写成的文章。18种语言可用" > <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种语言 </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 – 阿拉伯语" lang="ar" hreflang="ar" data-title="وحدة:parser" data-language-autonym="العربية" data-language-local-name="阿拉伯语" 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 – 班亞爾文" lang="bjn" hreflang="bjn" data-title="Modul:parser" data-language-autonym="Banjar" data-language-local-name="班亞爾文" 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 – 孟加拉语" lang="bn" hreflang="bn" data-title="মডিউল:parser" data-language-autonym="বাংলা" data-language-local-name="孟加拉语" 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 – 中库尔德语" lang="ckb" hreflang="ckb" data-title="مۆدیوول:parser" data-language-autonym="کوردی" data-language-local-name="中库尔德语" 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 – 英语" lang="en" hreflang="en" data-title="Module:parser" data-language-autonym="English" data-language-local-name="英语" 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 – 上索布语" lang="hsb" hreflang="hsb" data-title="Modul:parser" data-language-autonym="Hornjoserbsce" data-language-local-name="上索布语" 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 – 日语" lang="ja" hreflang="ja" data-title="モジュール:parser" data-language-autonym="日本語" data-language-local-name="日语" 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 – 柯尔克孜语" lang="ky" hreflang="ky" data-title="Модуль:parser" data-language-autonym="Кыргызча" data-language-local-name="柯尔克孜语" 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 – 马来语" lang="ms" hreflang="ms" data-title="Modul:parser" data-language-autonym="Bahasa Melayu" data-language-local-name="马来语" class="interlanguage-link-target">Bahasa Melayu</a></li><li class="interlanguage-link interwiki-mt mw-list-item"><a href="https://mt.wiktionary.org/wiki/Module:parser" title="Module:parser – 马耳他语" lang="mt" hreflang="mt" data-title="Module:parser" data-language-autonym="Malti" data-language-local-name="马耳他语" class="interlanguage-link-target">Malti</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 – 缅甸语" lang="my" hreflang="my" data-title="မော်ဂျူး:parser" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="缅甸语" 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 – 旁遮普语" lang="pa" hreflang="pa" data-title="ਮੌਡਿਊਲ:parser" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="旁遮普语" 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 – 掸语" lang="shn" hreflang="shn" data-title="မေႃႇၵျူး:parser" data-language-autonym="ၽႃႇသႃႇတႆး " data-language-local-name="掸语" 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 – 僧伽罗语" lang="si" hreflang="si" data-title="Module:parser" data-language-autonym="සිංහල" data-language-local-name="僧伽罗语" 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 – 塞尔维亚语" lang="sr" hreflang="sr" data-title="Модул:parser" data-language-autonym="Српски / srpski" data-language-local-name="塞尔维亚语" 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 – 泰语" lang="th" hreflang="th" data-title="มอดูล:parser" data-language-autonym="ไทย" data-language-local-name="泰语" class="interlanguage-link-target">ไทย</a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wiktionary.org/wiki/M%C3%B4_%C4%91un:parser" title="Mô đun:parser – 越南语" lang="vi" hreflang="vi" data-title="Mô đun:parser" data-language-autonym="Tiếng Việt" data-language-local-name="越南语" class="interlanguage-link-target">Tiếng Việt</a></li> </ul> <div class="after-portlet after-portlet-lang"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q123551062#sitelinks-wiktionary" title="编辑跨语言链接" class="wbc-editpage">编辑链接</a></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="命名空间"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-module" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Module:Parser" title="查看模块页面[c]" accesskey="c">模块</a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Module_talk:Parser&action=edit&redlink=1" rel="discussion" class="new" title="有关内容页面的讨论（页面不存在）[t]" accesskey="t">讨论</a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="更改语言变体" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" >English </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="查看"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Module:Parser">阅读</a></li><li id="ca-viewsource" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Module:Parser&action=edit" title="本页面受到保护。
您可以查看其源代码[e]" accesskey="e">查看源代码</a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Module:Parser&action=history" title="该页面过去的修订[h]" accesskey="h">查看历史</a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="页面工具"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="工具箱" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" >工具箱 </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">工具</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">移至侧栏</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">隐藏</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="更多选项" > <div class="vector-menu-heading"> 操作 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Module:Parser">阅读</a></li><li id="ca-more-viewsource" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Module:Parser&action=edit">查看源代码</a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Module:Parser&action=history">查看历史</a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> 常规 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:%E9%93%BE%E5%85%A5%E9%A1%B5%E9%9D%A2/Module:Parser" title="所有链接至本页面的wiki页面列表[j]" accesskey="j">链入页面</a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:%E9%93%BE%E5%87%BA%E6%9B%B4%E6%94%B9/Module:Parser" rel="nofollow" title="链自本页的页面的最近更改[k]" accesskey="k">相关更改</a></li><li id="t-upload" class="mw-list-item"><a href="//commons.wikimedia.org/wiki/Special:UploadWizard?uselang=zh" title="上传文件[u]" accesskey="u">上传文件</a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:%E7%89%B9%E6%AE%8A%E9%A1%B5%E9%9D%A2" title="所有特殊页面的列表[q]" accesskey="q">特殊页面</a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Module:Parser&oldid=8782728" title="此页面该修订版本的固定链接">永久链接</a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Module:Parser&action=info" title="关于此页面的更多信息">页面信息</a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:URL%E7%BC%A9%E7%9F%AD%E7%A8%8B%E5%BA%8F&url=https%3A%2F%2Fzh.wiktionary.org%2Fwiki%2FModule%3AParser">获取短链接</a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fzh.wiktionary.org%2Fwiki%2FModule%3AParser">下载二维码</a></li> </ul> </div> </div> <div id="p-electronpdfservice-sidebar-portlet-heading" class="vector-menu mw-portlet mw-portlet-electronpdfservice-sidebar-portlet-heading" > <div class="vector-menu-heading"> 打印/导出 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="electron-print_pdf" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Module%3AParser&action=show-download-screen">下载为PDF</a></li><li id="t-print" class="mw-list-item"><a href="javascript:print();" rel="alternate" title="本页面的可打印版本[p]" accesskey="p">打印页面</a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> 在其他项目中 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q123551062" title="链接到连接的数据仓库项目[g]" accesskey="g">维基数据项目</a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="页面工具"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="外观"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" 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">外观</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">移至侧栏</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">隐藏</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">維基詞典，自由的多語言詞典</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="zh" dir="ltr"><div class="documentation" style="display:block; clear:both"> <hr /> <dl class="plainlinks" style="font-size: smaller;"><dd>此模块缺少<a href="/wiki/Help:%E7%82%BA%E6%A8%A1%E6%9D%BF%E5%92%8C%E6%A8%A1%E7%B5%84%E6%92%B0%E5%AF%AB%E8%AA%AA%E6%98%8E%E6%96%87%E6%AA%94" title="Help:為模板和模組撰寫說明文檔">說明文檔</a>。請<a class="external text" href="https://zh.wiktionary.org/w/index.php?title=Module:Parser/doc&action=edit&preload=Template%3Adocumentation%2FpreloadModule">協助創建</a>。</dd> <dd> 相關連結：<a href="/wiki/Special:%E5%89%8D%E7%BC%80%E7%B4%A2%E5%BC%95/Module:Parser/" title="Special:前缀索引/Module:Parser/">子頁面列表</a> • <a class="external text" href="https://zh.wiktionary.org/w/index.php?title=Special%3AWhatLinksHere%2FModule%3AParser&hidetrans=1&hideredirs=1">链入</a> • <a class="external text" href="https://zh.wiktionary.org/w/index.php?title=Special%3AWhatLinksHere%2FModule%3AParser&hidelinks=1&hideredirs=1">嵌入包含</a> • <a href="/w/index.php?title=Module:Parser/testcases&action=edit&redlink=1" class="new" title="Module:Parser/testcases（页面不存在）">測試用例</a> • <a href="/w/index.php?title=Module:Parser/sandbox&action=edit&redlink=1" class="new" title="Module:Parser/sandbox（页面不存在）">沙盒</a></dd></dl> </div><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" alt="" width="1" height="1" style="border: none; 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