ts-simple-ast
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TypeScript compiler wrapper for AST navigation and code generation.
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<!--<p class="subText">Simple way to navigate and manipulate the TypeScript AST.</p>-->
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<section class="container-fluid col-md-9">
<h2 id="class-declarations">Class Declarations</h2>
<p>Class declarations 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">classes</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getClasses</span><span class="p">();</span>
<span class="kd">const</span> <span class="nx">class1</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getClass</span><span class="p">(</span><span class="s2">"Class1"</span><span class="p">);</span>
<span class="kd">const</span> <span class="nx">firstClassWithConstructor</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">getClass</span><span class="p">(</span><span class="nx">c</span> <span class="o">=></span> <span class="nx">c</span><span class="p">.</span><span class="nx">getConstructors</span><span class="p">().</span><span class="nx">length</span> <span class="o">></span> <span class="mi">0</span><span class="p">);</span>
</code></pre>
</div>
<h3 id="addinsert">Add/Insert</h3>
<p>Add or insert classes to a source file, namespace, or function like declarations by calling <code class="highlighter-rouge">addClass()</code>, <code class="highlighter-rouge">addClasses()</code>, <code class="highlighter-rouge">insertClass()</code>, or <code class="highlighter-rouge">insertClasses()</code>.</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">classDeclaration</span> <span class="o">=</span> <span class="nx">sourceFile</span><span class="p">.</span><span class="nx">addClass</span><span class="p">({</span>
<span class="na">name</span><span class="p">:</span> <span class="s2">"ClassName"</span>
<span class="p">});</span>
</code></pre>
</div>
<h3 id="remove">Remove</h3>
<p>Call <code class="highlighter-rouge">.remove()</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">remove</span><span class="p">();</span>
</code></pre>
</div>
<h3 id="extends-expression">Extends expression</h3>
<p>Will return <a href="expressions"><code class="highlighter-rouge">ExpressionWithTypeArguments | undefined</code></a>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">extendsExpression</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getExtends</span><span class="p">();</span>
</code></pre>
</div>
<p>Set the extends expression:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">setExtends</span><span class="p">(</span><span class="s2">"BaseClass"</span><span class="p">);</span>
</code></pre>
</div>
<p>Remove it:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">removeExtends</span><span class="p">();</span>
</code></pre>
</div>
<h3 id="implements-expressions">Implements expressions</h3>
<p>Will return <a href="expressions"><code class="highlighter-rouge">ExpressionWithTypeArguments[]</code></a>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">implementsExpressions</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getImplements</span><span class="p">();</span>
</code></pre>
</div>
<p>Add or insert implements expressions:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">addImplements</span><span class="p">(</span><span class="s2">"Named"</span><span class="p">);</span>
<span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">addImplements</span><span class="p">([</span><span class="s2">"Named"</span><span class="p">,</span> <span class="s2">"Aged"</span><span class="p">]);</span>
<span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">insertImplements</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="s2">"Named"</span><span class="p">);</span>
<span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">insertImplements</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="p">[</span><span class="s2">"Named"</span><span class="p">,</span> <span class="s2">"Aged"</span><span class="p">]);</span>
</code></pre>
</div>
<p>Remove an expression:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">removeImplements</span><span class="p">(</span><span class="mi">0</span><span class="p">);</span> <span class="c1">// index</span>
<span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">removeImplements</span><span class="p">(</span><span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getImplements</span><span class="p">()[</span><span class="mi">0</span><span class="p">]);</span> <span class="c1">// node</span>
</code></pre>
</div>
<h3 id="base-types">Base Types</h3>
<p>Get the base types:</p>
<div class="language-ts highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">baseTypes</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getBaseTypes</span><span class="p">();</span> <span class="c1">// returns: Type[]</span>
</code></pre>
</div>
<p>This is useful to use if you don’t know if the class could possibly extend a mixin or a class.</p>
<h3 id="base-class">Base Class</h3>
<p>Get the base class:</p>
<div class="language-ts highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">baseClass</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getBaseClass</span><span class="p">();</span> <span class="c1">// returns: ClassDeclaration | undefined</span>
</code></pre>
</div>
<p>Note: This is not a useful method to use if the base could possibly be a mixin. If you expect mixins, then use <code class="highlighter-rouge">.getBaseTypes()</code>.</p>
<h3 id="derived-classes">Derived Classes</h3>
<p>Will return all the class declarations that derive from the current class:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">derivedClasses</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getDerivedClasses</span><span class="p">();</span>
</code></pre>
</div>
<h3 id="constructor">Constructor</h3>
<p>Constructors can be retreived via <code class="highlighter-rouge">getConstructors</code>. This returns all the constructors in an ambient context, but will only return the
implementation constructor otherwise.</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">constructors</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getConstructors</span><span class="p">();</span>
</code></pre>
</div>
<p>Add or insert a constructor by calling <code class="highlighter-rouge">addConstructor()</code> or <code class="highlighter-rouge">insertConstructor()</code> respectively.</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">ctor</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">addConstructor</span><span class="p">({</span> <span class="cm">/* options like parameters may go here */</span> <span class="p">});</span>
</code></pre>
</div>
<h3 id="methods">Methods</h3>
<p>Get instance methods:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">instanceMethods</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getInstanceMethods</span><span class="p">();</span>
<span class="kd">const</span> <span class="nx">myMethod</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getInstanceMethod</span><span class="p">(</span><span class="s2">"myMethod"</span><span class="p">);</span>
<span class="kd">const</span> <span class="nx">firstMethodWith2Params</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getInstanceMethod</span><span class="p">(</span><span class="nx">m</span> <span class="o">=></span> <span class="nx">m</span><span class="p">.</span><span class="nx">getParameters</span><span class="p">().</span><span class="nx">length</span> <span class="o">===</span> <span class="mi">2</span><span class="p">);</span>
</code></pre>
</div>
<p>Get the static methods:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">staticMethods</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getStaticMethods</span><span class="p">();</span>
<span class="kd">const</span> <span class="nx">myStaticMethod</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getStaticMethod</span><span class="p">(</span><span class="s2">"myMethod"</span><span class="p">);</span>
<span class="kd">const</span> <span class="nx">firstStaticMethodWith2Params</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getStaticMethod</span><span class="p">(</span><span class="nx">m</span> <span class="o">=></span> <span class="nx">m</span><span class="p">.</span><span class="nx">getParameters</span><span class="p">().</span><span class="nx">length</span> <span class="o">===</span> <span class="mi">2</span><span class="p">);</span>
</code></pre>
</div>
<h4 id="addinsert-1">Add/Insert</h4>
<p>Add or insert methods by using <code class="highlighter-rouge">insertMethods()</code>, <code class="highlighter-rouge">insertMethod</code>, <code class="highlighter-rouge">addMethod</code>, or <code class="highlighter-rouge">addMethods</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">method</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">addMethod</span><span class="p">({</span> <span class="na">isStatic</span><span class="p">:</span> <span class="kc">true</span><span class="p">,</span> <span class="na">name</span><span class="p">:</span> <span class="s2">"myMethod"</span><span class="p">,</span> <span class="na">returnType</span><span class="p">:</span> <span class="s2">"string"</span> <span class="p">});</span>
</code></pre>
</div>
<h4 id="remove-1">Remove</h4>
<p>Call <code class="highlighter-rouge">.remove()</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">method</span><span class="p">.</span><span class="nx">remove</span><span class="p">();</span>
</code></pre>
</div>
<h3 id="properties">Properties</h3>
<p>Properties searched for can be of type <code class="highlighter-rouge">PropertyDeclaration</code>, <code class="highlighter-rouge">GetAccessorDeclaration</code>, <code class="highlighter-rouge">SetAccessorDeclaration</code>, or <code class="highlighter-rouge">ParameterDeclaration</code> (constructor parameter properties).</p>
<p>Get the instance properties:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">instanceProperties</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getInstanceProperties</span><span class="p">();</span>
<span class="kd">const</span> <span class="nx">myProperty</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getInstanceProperty</span><span class="p">(</span><span class="s2">"myProperty"</span><span class="p">);</span>
<span class="kd">const</span> <span class="nx">myStringProperty</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getInstanceProperty</span><span class="p">(</span><span class="nx">p</span> <span class="o">=></span>
<span class="nx">TypeGuards</span><span class="p">.</span><span class="nx">isPropertyDeclaration</span><span class="p">(</span><span class="nx">p</span><span class="p">)</span> <span class="o">&&</span> <span class="nx">p</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>
<p>Get the static properties:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">staticProperties</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getStaticProperties</span><span class="p">();</span>
<span class="kd">const</span> <span class="nx">myStaticProperty</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getStaticProperty</span><span class="p">(</span><span class="s2">"myStaticProperty"</span><span class="p">);</span>
<span class="kd">const</span> <span class="nx">myStaticStringProperty</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getStaticProperty</span><span class="p">(</span><span class="nx">p</span> <span class="o">=></span>
<span class="nx">TypeGuards</span><span class="p">.</span><span class="nx">isPropertyDeclaration</span><span class="p">(</span><span class="nx">p</span><span class="p">)</span> <span class="o">&&</span> <span class="nx">p</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>
<h4 id="addinsert-2">Add/Insert</h4>
<p>Add or insert properties by using <code class="highlighter-rouge">insertProperties()</code>, <code class="highlighter-rouge">insertProperty</code>, <code class="highlighter-rouge">addProperty</code>, or <code class="highlighter-rouge">addProperties</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">property</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">addProperty</span><span class="p">({</span> <span class="na">isStatic</span><span class="p">:</span> <span class="kc">true</span><span class="p">,</span> <span class="na">name</span><span class="p">:</span> <span class="s2">"prop"</span><span class="p">,</span> <span class="na">type</span><span class="p">:</span> <span class="s2">"string"</span> <span class="p">});</span>
</code></pre>
</div>
<p>Add or insert get accessors by using <code class="highlighter-rouge">insertGetAccessors()</code>, <code class="highlighter-rouge">insertGetAccessor</code>, <code class="highlighter-rouge">addGetAccessor</code>, or <code class="highlighter-rouge">addGetAccessors</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">getAccessor</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">addGetAccessor</span><span class="p">({</span> <span class="na">name</span><span class="p">:</span> <span class="s2">"someNumber"</span><span class="p">,</span> <span class="na">returnType</span><span class="p">:</span> <span class="s2">"number"</span><span class="p">,</span> <span class="na">body</span><span class="p">:</span> <span class="s2">"return 5;"</span> <span class="p">});</span>
</code></pre>
</div>
<p>Add or insert set accessors by using <code class="highlighter-rouge">insertSetAccessors()</code>, <code class="highlighter-rouge">insertSetAccessor</code>, <code class="highlighter-rouge">addSetAccessor</code>, or <code class="highlighter-rouge">addSetAccessors</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">setAccessor</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">addSetAccessor</span><span class="p">({</span> <span class="na">name</span><span class="p">:</span> <span class="s2">"someNumber"</span><span class="p">,</span> <span class="na">parameters</span><span class="p">:</span> <span class="p">[{</span> <span class="na">name</span><span class="p">:</span> <span class="s2">"value"</span><span class="p">,</span> <span class="na">type</span><span class="p">:</span> <span class="s2">"number"</span> <span class="p">}],</span> <span class="na">body</span><span class="p">:</span> <span class="s2">"_someNumber = value;"</span> <span class="p">});</span>
</code></pre>
</div>
<h4 id="remove-2">Remove</h4>
<p>Call <code class="highlighter-rouge">.remove()</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">property</span><span class="p">.</span><span class="nx">remove</span><span class="p">();</span>
</code></pre>
</div>
<h3 id="get-members">Get members</h3>
<p>Get all static and instance members:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">allMembers</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getAllMembers</span><span class="p">();</span>
</code></pre>
</div>
<p>Get instance members:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">instanceMembers</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getInstanceMembers</span><span class="p">();</span>
</code></pre>
</div>
<p>Get static members:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">staticMembers</span> <span class="o">=</span> <span class="nx">classDeclaration</span><span class="p">.</span><span class="nx">getStaticMembers</span><span class="p">();</span>
</code></pre>
</div>
<h2 id="abstract">Abstract</h2>
<p>Nodes on a class may be abstract.</p>
<p>Get if it’s abstract:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">method</span><span class="p">.</span><span class="nx">isAbstract</span><span class="p">();</span> <span class="c1">// returns: boolean</span>
</code></pre>
</div>
<p>Get the abstract keyword:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">method</span><span class="p">.</span><span class="nx">getAbstractKeyword</span><span class="p">();</span> <span class="c1">// returns: node | undefined</span>
</code></pre>
</div>
<p>Set if abstract:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">method</span><span class="p">.</span><span class="nx">setIsAbstract</span><span class="p">(</span><span class="kc">true</span><span class="p">);</span> <span class="c1">// set as abstract</span>
<span class="nx">method</span><span class="p">.</span><span class="nx">setIsAbstract</span><span class="p">(</span><span class="kc">false</span><span class="p">);</span> <span class="c1">// set as not abstract</span>
</code></pre>
</div>
<h2 id="constructors">Constructors</h2>
<p>Constructors implement common functions found on function like declarations, but also include a scope.</p>
<h2 id="methods-1">Methods</h2>
<p>Explore the functionality available via auto-complete.</p>
<h2 id="properties-1">Properties</h2>
<p>Explore the functionality available via auto-complete.</p>
<h2 id="get-accessors">Get Accessors</h2>
<p>If it exists, get the corresponding set accessor:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">setAccessor</span> <span class="o">=</span> <span class="nx">getAccessor</span><span class="p">.</span><span class="nx">getSetAccessor</span><span class="p">();</span>
</code></pre>
</div>
<h2 id="set-accessors">Set Accessors</h2>
<p>If it exists, get the corresponding get accessor:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">getAccessor</span> <span class="o">=</span> <span class="nx">setAccessor</span><span class="p">.</span><span class="nx">getGetAccessor</span><span class="p">();</span>
</code></pre>
</div>
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