ts-simple-ast
Version:
TypeScript compiler wrapper for AST navigation and code generation.
188 lines (146 loc) • 12.1 kB
HTML
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>TsSimpleAst</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
<link rel="stylesheet" href="/assets/css/style.css?v=71a391c40e7283d83416a246f2c61c5fcb76068a">
<!--
<link rel="stylesheet" href="/assets/css/style.css?v=71a391c40e7283d83416a246f2c61c5fcb76068a">
<link rel="stylesheet" href="/assets/css/custom-style.css?v=71a391c40e7283d83416a246f2c61c5fcb76068a">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script src="/assets/js/main.js"></script>-->
</head>
<body>
<div class="main">
<header class="container">
<div class="row">
<h1 onclick="document.location.href = '/'" class="headerLink">TsSimpleAst</h1>
<!--<p class="subText">Simple way to navigate and manipulate the TypeScript AST.</p>-->
</div>
</header>
<div class="container">
<div class="row">
<div class="col-md-3">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<nav class="sidebar-nav" id="navbarSupportedContent">
<ul class="navbar-nav navbar-default">
<li class="nav-item">
<a class="nav-link" href="/">Overview</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/setup">Setup</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/navigation">Navigation</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/manipulation">Manipulation</a>
</li>
<li class="">
<a class="nav-link" href="/details/index">Details</a>
<ul>
<li class=""><a href="/details/source-files">Source Files</a></li>
<li class=""><a href="/details/classes">Classes</a></li>
<li class=""><a href="/details/enums">Enums</a></li>
<li class=""><a href="/details/functions">Functions</a></li>
<li class=""><a href="/details/interfaces">Interfaces</a></li>
<li class=""><a href="/details/namespaces">Namespaces</a></li>
<li class=""><a href="/details/type-aliases">Type Aliases</a></li>
<li class="active"><a href="/details/variables">Variables</a></li>
<li>--</li>
<li class=""><a href="/details/types">Types</a></li>
<li class=""><a href="/details/expressions">Expressions</a></li>
<li>--</li>
<li class=""><a href="/details/ambient">Ambient</a></li>
<li class=""><a href="/details/async">Async</a></li>
<li class=""><a href="/details/decorators">Decorators</a></li>
<li class=""><a href="/details/exports">Exports</a></li>
<li class=""><a href="/details/generators">Generators</a></li>
<li class=""><a href="/details/documentation">JS Docs</a></li>
<li class=""><a href="/details/modifiers">Modifiers</a></li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link" href="http://github.com/dsherret/ts-simple-ast">View on GitHub</a>
</li>
</ul>
</nav>
</div>
<section class="container-fluid col-md-9">
<h2 id="variables">Variables</h2>
<p>There is a hierarchy in the AST that’s important to understand for variables:</p>
<ol>
<li>Variable statement.</li>
<li>Variable declaration list.</li>
<li>Variable declaration.</li>
</ol>
<h2 id="variable-statement">Variable Statement</h2>
<p>Example:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="k">export</span> <span class="kd">const</span> <span class="nx">var1</span> <span class="o">=</span> <span class="s2">"5"</span><span class="p">,</span> <span class="nx">var2</span> <span class="o">=</span> <span class="s2">"6"</span><span class="p">;</span>
</code></pre>
</div>
<p>From a variable statement you will be able to get or set (if implemented) a variable declaration list, documentation, ambient information, and exported information.</p>
<h3 id="get-a-variable-statement">Get a variable statement</h3>
<p>Can be retrieved from source files, namespaces, or function bodies:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">variableStatements</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getVariableStatements</span><span class="p">();</span>
<span class="kd">const</span> <span class="nx">firstExportedVariableStatement</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getVariableStatement</span><span class="p">(</span><span class="nx">s</span> <span class="o">=></span> <span class="nx">s</span><span class="p">.</span><span class="nx">hasExportKeyword</span><span class="p">());</span>
</code></pre>
</div>
<h2 id="variable-declaration-list">Variable Declaration List</h2>
<p>Example:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">var1</span> <span class="o">=</span> <span class="s2">"5"</span><span class="p">,</span>
<span class="nx">var2</span> <span class="o">=</span> <span class="s2">"6"</span><span class="p">;</span>
</code></pre>
</div>
<h3 id="get-variable-declaration-list">Get variable declaration list</h3>
<p>You can get one from the variable statement:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">declarationList</span> <span class="o">=</span> <span class="nx">variableStatement</span><span class="p">.</span><span class="nx">getDeclarationList</span><span class="p">();</span>
</code></pre>
</div>
<p>Or from source files, namespaces, and function bodies:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">variableDeclarationLists</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getVariableDeclarationLists</span><span class="p">();</span>
<span class="kd">const</span> <span class="nx">firstConstDeclaration</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getVariableDeclarationList</span><span class="p">(</span><span class="nx">l</span> <span class="o">=></span>
<span class="nx">l</span><span class="p">.</span><span class="nx">getDeclarationType</span><span class="p">()</span> <span class="o">===</span> <span class="nx">VariableDeclarationType</span><span class="p">.</span><span class="nx">Const</span><span class="p">);</span>
</code></pre>
</div>
<h3 id="get-declaration-type">Get declaration type</h3>
<p>Use:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">declarationType</span> <span class="o">=</span> <span class="nx">variableDeclarationList</span><span class="p">.</span><span class="nx">getDeclarationType</span><span class="p">();</span>
</code></pre>
</div>
<p>It will return one of the following values:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">VariableDeclarationType</span><span class="p">.</span><span class="nx">Let</span><span class="p">;</span>
<span class="nx">VariableDeclarationType</span><span class="p">.</span><span class="nx">Const</span><span class="p">;</span>
<span class="nx">VariableDeclarationType</span><span class="p">.</span><span class="nx">Var</span><span class="p">;</span>
</code></pre>
</div>
<h2 id="variable-declaration">Variable Declaration</h2>
<p>These are the individual declarations within a variable declaration list.</p>
<h3 id="get-variable-declaration">Get variable declaration</h3>
<p>You can get them from the variable declaration list:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">variableDeclarations</span> <span class="o">=</span> <span class="nx">variableDeclarationList</span><span class="p">.</span><span class="nx">getDeclarations</span><span class="p">();</span>
</code></pre>
</div>
<p>Or from source files, namespaces, and function bodies:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">variableDeclarations</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getVariableDeclarations</span><span class="p">();</span>
<span class="kd">const</span> <span class="nx">variableDeclaration</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getVariableDeclaration</span><span class="p">(</span><span class="s2">"myVar"</span><span class="p">);</span>
<span class="kd">const</span> <span class="nx">firstStringTypedVariableDeclaration</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getVariableDeclaration</span><span class="p">(</span><span class="nx">v</span> <span class="o">=></span>
<span class="nx">v</span><span class="p">.</span><span class="nx">getType</span><span class="p">().</span><span class="nx">getText</span><span class="p">()</span> <span class="o">===</span> <span class="s2">"string"</span><span class="p">);</span>
</code></pre>
</div>
</section>
</div>
</div>
<footer>
</footer>
</div>
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
<!--[if !IE]><script>fixScale(document);</script><![endif]-->
</body>
</html>