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<link rel="search" type="application/opensearchdescription+xml" title="TypeScriptToLua" href="/opensearch.xml"><title data-react-helmet="true">Plugins | TypeScriptToLua</title><meta data-react-helmet="true" name="twitter:card" content="summary_large_image"><meta data-react-helmet="true" name="docsearch:language" content="en"><meta data-react-helmet="true" name="docsearch:version" content="current"><meta data-react-helmet="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-react-helmet="true" property="og:title" content="Plugins | TypeScriptToLua"><meta data-react-helmet="true" name="description" content="TypeScriptToLua supports plugins - an interface that allows to customize transpilation behavior."><meta data-react-helmet="true" property="og:description" content="TypeScriptToLua supports plugins - an interface that allows to customize transpilation behavior."><meta data-react-helmet="true" property="og:url" content="https://typescripttolua.github.io/docs/api/plugins"><link data-react-helmet="true" rel="shortcut icon" href="/images/favicon.ico"><link data-react-helmet="true" rel="preconnect" href="https://BH4D9OD16A-dsn.algolia.net" crossorigin="anonymous"><link data-react-helmet="true" rel="canonical" href="https://typescripttolua.github.io/docs/api/plugins"><link rel="stylesheet" href="/styles.dd4f4be3.css">
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23h22"></path></svg></button><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" href="/docs/getting-started">Getting Started</a></li><li class="menu__list-item"><a class="menu__link" href="/docs/configuration">Configuration</a></li><li class="menu__list-item"><a class="menu__link" href="/docs/caveats">Caveats</a></li><li class="menu__list-item"><a class="menu__link" href="/docs/the-self-parameter">The Self Parameter</a></li><li class="menu__list-item"><a class="menu__link" href="/docs/editor-support">Editor Support</a></li><li class="menu__list-item menu__list-item--collapsed"><a class="menu__link menu__link--sublist" href="#!">Advanced</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/advanced/writing-declarations">Writing Declarations</a></li><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/advanced/compiler-annotations">Compiler Annotations</a></li><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/advanced/language-extensions">Language extensions</a></li></ul></li><li class="menu__list-item"><a class="menu__link menu__link--sublist menu__link--active" href="#!">API</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/api/overview">Overview</a></li><li class="menu__list-item"><a aria-current="page" class="menu__link menu__link--active active" tabindex="0" href="/docs/api/plugins">Plugins</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/api/printer">Printer</a></li></ul></li></ul></div></div></div><main class="docMainContainer_2iGs"><div class="container padding-vert--lg docItemWrapper_1bxp"><div class="row"><div class="col docItemCol_U38p"><div class="docItemContainer_a7m4"><article><header><h1 class="docTitle_Oumm">Plugins</h1></header><div class="markdown"><p>TypeScriptToLua supports plugins - an interface that allows to customize transpilation behavior.</p><p>To add a plugin you have to add it under <code>tstl.luaPlugins</code> option in the <a href="/docs/configuration">configuration file</a>.</p><p>Example:</p><div class="mdxCodeBlock_1zKU"><div class="title_1twf">tsconfig.json</div><pre class="prism-code language-json codeBlock_222H hasTitle_1PmY"><button type="button" aria-label="Copy code to clipboard" class="copyButton_ujp3">Copy</button><code class="codeBlockLines_3zpG" style="color:#393A34;background-color:#f6f8fa"><div class="token-line" style="color:#393A34"><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token property" style="color:#36acaa">"tstl"</span><span class="token operator" style="color:#393A34">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token property" style="color:#36acaa">"luaPlugins"</span><span class="token operator" style="color:#393A34">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// Plugin is a JavaScript module exporting an object</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> </span><span class="token property" style="color:#36acaa">"name"</span><span class="token operator" style="color:#393A34">:</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"./plugin1.js"</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// TypeScriptToLua can load plugins written in TypeScript using `ts-node`</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> </span><span class="token property" style="color:#36acaa">"name"</span><span class="token operator" style="color:#393A34">:</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"./plugin2.ts"</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// Plugins can be published to npm</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> </span><span class="token property" style="color:#36acaa">"name"</span><span class="token operator" style="color:#393A34">:</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"tstl-plugin-3"</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span></div></code></pre></div><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_prK2" id="api"></a>API<a class="hash-link" href="#api" title="Direct link to heading">#</a></h2><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_prK2" id="visitors"></a><code>visitors</code><a class="hash-link" href="#visitors" title="Direct link to heading">#</a></h3><p>Internally, to process <a href="https://basarat.gitbook.io/typescript/overview/ast" target="_blank" rel="noopener noreferrer">Abstract Syntax Tree</a> of a TypeScript program, TypeScriptToLua implements the <a href="https://en.wikipedia.org/wiki/Visitor_pattern" target="_blank" rel="noopener noreferrer">visitor pattern</a>. Visitor is a function, called with a processed node and transformation context, and returning a Lua AST node. Plugins can inject their own visitors using <code>visitors</code> property, overriding standard transformation behavior.</p><p>Example:</p><div class="mdxCodeBlock_1zKU"><pre class="prism-code language-ts codeBlock_222H"><button type="button" aria-label="Copy code to clipboard" class="copyButton_ujp3">Copy</button><a aria-label="Open code on playground" class="playgroundButton_3DKR" target="_blank" href="/play/#code/JYWwDg9gTgLgBAKjgQwM5xugZlCI4BEMAnmAKaoDGUwYMBA3AFCiSyIrqYwA2cOeQiXJUadALQwI4ngFdkjJk0oQAdqnhg5Ac2CqAXBg08AdAAUdeuAF44AbyZw4AemdwABgDdgqYFKio7nA+KHBQZCpQACZwAO4AFmThcADWZMToyMkAKqRkAMrUtPCqEFFkcKjEqjDIAB6pelGojnDevv6ohg5OTq5wAGo+ftBwlMiqcABGFcj8sqqUMMBqGPHI8OEwslDqcAAy8nAAgvnZcKXlrU4A2pgm+dW1dQDSTSYASmTbu-m1MGQQGQagBdQwACgAlDYAHxGXgmahkDZkL4-VR-FFAmrgu7GRHhFEAIQgEB4yNU+z8SWQPHBMCgsjIkJBkIANK0AL4cznMJhkOpseDlLDIWQ8TSWVQMIA">Playground</a><code class="codeBlockLines_3zpG" style="color:#393A34;background-color:#f6f8fa"><div class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">import</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">*</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">as</span><span class="token plain"> ts </span><span class="token keyword" style="color:#00009f">from</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"typescript"</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">import</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">*</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">as</span><span class="token plain"> tstl </span><span class="token keyword" style="color:#00009f">from</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"typescript-to-lua"</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> plugin</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> tstl</span><span class="token punctuation" style="color:#393A34">.</span><span class="token property-access maybe-class-name">Plugin</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// `visitors` is a record where keys are TypeScript node syntax kinds</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> visitors</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// Visitor can be a function that returns Lua AST node</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">ts</span><span class="token punctuation" style="color:#393A34">.</span><span class="token property-access maybe-class-name">SyntaxKind</span><span class="token punctuation" style="color:#393A34">.</span><span class="token property-access maybe-class-name">ReturnStatement</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token arrow operator" style="color:#393A34">=></span><span class="token plain"> tstl</span><span class="token punctuation" style="color:#393A34">.</span><span class="token method function property-access" style="color:#d73a49">createReturnStatement</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">tstl</span><span class="token punctuation" style="color:#393A34">.</span><span class="token method function property-access" style="color:#d73a49">createBooleanLiteral</span><span class="token punctuation" style="color:#393A34">(</span><span class="token boolean" style="color:#36acaa">true</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">export</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">default</span><span class="token plain"> plugin</span><span class="token punctuation" style="color:#393A34">;</span></div></code></pre></div><p>Example 2:</p><div class="mdxCodeBlock_1zKU"><pre class="prism-code language-ts codeBlock_222H"><button type="button" aria-label="Copy code to clipboard" class="copyButton_ujp3">Copy</button><a aria-label="Open code on playground" class="playgroundButton_3DKR" target="_blank" href="/play/#code/JYWwDg9gTgLgBAKjgQwM5xugZlCI4BEMAnmAKaoDGUwYMBA3AFCiSyIrqYwA2cOeQiXJUadALQwI4ngFdkjJk0oQAdqnhg5Ac2CqAXBg08AdAAUdeuAF44AbyZw4AN2CpgUqKkMOnTgPT+cABqbh5wGjSq2nA8HmRQyDyoADRwwFhw0MC6qkkYiepY0CAJcFBkMLJQ6igRMFExcTAJSWmUABbI0WQYHb2RejFShABGyFAE6eotyAAmjn4A2pgmAMrEqjDIAB4A0npz6w1DADLxiTwAuoYAFKoQc2Ttai07MACUNgB89ot+cECcAABiotmR3sC4BDIKgKCDULJyFAACqFVDFKAgBBQ0owDqPVJ9ZDwSjdOCjXqyOFzDAQOBknh8MgefpQPq9VzuTxwMC4VxPWmjYi8iquCDU-5+IFaWS5NLQOoabpzCa0lGkMhrai0GAoiCneQuMKeKVOMEacoUWQ8eC2MFvGAmRHItHdDElACiOz5FHcanujzIH2YZsBQTW21UqqgtK5HkVmKMx0a5xalxQPAA7shiOgKlUalxjCmzhd8g8nmGMnBbtxTG5I6nyzxbhVEbaPl9fAC-O2bU7nElZL1bARxpNmL24ABfJTTgvVVRWjswKd+GcpRabpgz0Mw6DwJ5YZAD3mWVQMIA">Playground</a><code class="codeBlockLines_3zpG" style="color:#393A34;background-color:#f6f8fa"><div class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">import</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">*</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">as</span><span class="token plain"> ts </span><span class="token keyword" style="color:#00009f">from</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"typescript"</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">import</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">*</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">as</span><span class="token plain"> tstl </span><span class="token keyword" style="color:#00009f">from</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"typescript-to-lua"</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> plugin</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> tstl</span><span class="token punctuation" style="color:#393A34">.</span><span class="token property-access maybe-class-name">Plugin</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> visitors</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// Visit string literals, if original transformer returns a string literal, change the string to "bar" instead</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">ts</span><span class="token punctuation" style="color:#393A34">.</span><span class="token property-access maybe-class-name">SyntaxKind</span><span class="token punctuation" style="color:#393A34">.</span><span class="token property-access maybe-class-name">StringLiteral</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token parameter">node</span><span class="token parameter punctuation" style="color:#393A34">,</span><span class="token parameter"> context</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token arrow operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// `context` exposes `superTransform*` methods, that can be used to call either the visitor provided by previous</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// plugin, or a standard TypeScriptToLua visitor</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> result </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> context</span><span class="token punctuation" style="color:#393A34">.</span><span class="token method function property-access" style="color:#d73a49">superTransformExpression</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">node</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">// Standard visitor for ts.StringLiteral always returns tstl.StringLiteral node</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">if</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">tstl</span><span class="token punctuation" style="color:#393A34">.</span><span class="token method function property-access" style="color:#d73a49">isStringLiteral</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">result</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> result</span><span class="token punctuation" style="color:#393A34">.</span><span class="token property-access">value</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"bar"</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> result</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">export</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">default</span><span class="token plain"> plugin</span><span class="token punctuation" style="color:#393A34">;</span></div></code></pre></div><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_prK2" id="printer"></a><code>printer</code><a class="hash-link" href="#printer" title="Direct link to heading">#</a></h3><p>Printer is a function that overrides standard implementation of Lua AST printer. It receives some information about the file and transformed Lua AST. See <a href="/docs/api/printer">Printer</a> page for more information.</p><p>Example:</p><div class="mdxCodeBlock_1zKU"><pre class="prism-code language-ts codeBlock_222H"><button type="button" aria-label="Copy code to clipboard" class="copyButton_ujp3">Copy</button><a aria-label="Open code on playground" class="playgroundButton_3DKR" target="_blank" href="/play/#code/JYWwDg9gTgLgBAKjgQwM5xqmAbOAzKCEOAIhgE8wBTVAYymDBgFoYJnsBXZEgbgCh+tbGnQBhTliIAZbgAUGAOxhUocKgA8VigCbpMOAHSzkC4MtVwA3gF9BtCIqxwwXAObmAXBizZDc93M4AF5rfjgXJRUobwAKMEI3KGQQABp1EGAYAAkILHS8YGwqADkUqnSAI2wIWgBrdK5kaWBKgDEqZBhOKBoAShCAPnCIuEUqAHc4CSkQEzMLKHjE5JBDNyoYMSIwItUAeSZgR1RYvvSqTJy8mAK9spAqPsME8xhY6tqGuCaW9s7ur1UOd+DYBPxNJBYHAdFQ8MhONh4K5OB5FLwgA">Playground</a><code class="codeBlockLines_3zpG" style="color:#393A34;background-color:#f6f8fa"><div class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">import</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">*</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">as</span><span class="token plain"> tstl </span><span class="token keyword" style="color:#00009f">from</span><span class="token plain"> </span><span class="token string" style="color:#e3116c">"typescript-to-lua"</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">class</span><span class="token plain"> </span><span class="token class-name">CustomLuaPrinter</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">extends</span><span class="token plain"> </span><span class="token class-name">tstl</span><span class="token class-name punctuation" style="color:#393A34">.</span><span class="token class-name">LuaPrinter</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> plugin</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> tstl</span><span class="token punctuation" style="color:#393A34">.</span><span class="token property-access maybe-class-name">Plugin</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function-variable function" style="color:#d73a49">printer</span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token parameter">program</span><span class="token parameter punctuation" style="color:#393A34">,</span><span class="token parameter"> emitHost</span><span class="token parameter punctuation" style="color:#393A34">,</span><span class="token parameter"> fileName</span><span class="token parameter punctuation" style="color:#393A34">,</span><span class="token parameter"> block</span><span class="token parameter punctuation" style="color:#393A34">,</span><span class="token parameter"> luaLibFeatures</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token arrow operator" style="color:#393A34">=></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">new</span><span class="token plain"> </span><span class="token class-name">CustomLuaPrinter</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">program</span><span class="token punctuation" style="color:#393A34">.</span><span class="token method function property-access" style="color:#d73a49">getCompilerOptions</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> emitHost</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> fileName</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">.</span><span class="token method function property-access" style="color:#d73a49">print</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">block</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> luaLibFeatures</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block">
</span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">export</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">default</span><span class="token plain"> plugin</span><span class="token punctuation" style="color:#393A34">;</span></div></code></pre></div></div></article><div class="margin-vert--xl"><div class="row"><div class="col"><a href="https://github.com/TypeScriptToLua/TypeScriptToLua.github.io/edit/source/docs/api/plugins.md" target="_blank" rel="noreferrer noopener"><svg fill="currentColor" height="1.2em" width="1.2em" preserveAspectRatio="xMidYMid meet" role="img" viewBox="0 0 40 40" class="iconEdit_2LL7"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div></div></div><div class="margin-vert--lg"><nav class="pagination-nav" aria-label="Blog list page navigation"><div class="pagination-nav__item"><a class="pagination-nav__link" href="/docs/api/overview"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">« Overview</div></a></div><div class="pagination-nav__item pagination-nav__item--next"><a class="pagination-nav__link" href="/docs/api/printer"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Printer »</div></a></div></nav></div></div></div><div class="col col--3"><div class="tableOfContents_2xL- thin-scrollbar"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#api" class="table-of-contents__link">API</a><ul><li><a href="#visitors" class="table-of-contents__link"><code>visitors</code></a></li><li><a href="#printer" class="table-of-contents__link"><code>printer</code></a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer"><div class="container"><div class="row footer__links"><div class="col footer__col"><h4 class="footer__title">Docs</h4><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/docs/getting-started">Getting Started</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/configuration">Configuration</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/advanced/writing-declarations">Advanced</a></li></ul></div><div class="col footer__col"><h4 class="footer__title">Community</h4><ul class="footer__items"><li class="footer__item"><a href="https://discord.gg/BWAq58Y" target="_blank" rel="noopener noreferrer" class="footer__link-item">Discord</a></li></ul></div><div class="col footer__col"><h4 class="footer__title">More</h4><ul class="footer__items"><li class="footer__item"><a href="https://github.com/TypeScriptToLua" target="_blank" rel="noopener noreferrer" class="footer__link-item">Github</a></li><li class="footer__item"><a class="footer__link-item" href="/play">Playground</a></li></ul></div></div><div class="footer__bottom text--center"><div class="margin-bottom--sm"><a href="https://github.com/TypescriptToLua" target="_blank" rel="noopener noreferrer" class="footerLogoLink_31Aa"><img class="footer__logo" alt="TypescriptToLua Logo" src="/images/logo.png"></a></div><div class="footer__copyright">Copyright © 2021 TypescriptToLua Contributors</div></div></div></footer></div>
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