ts-simple-ast
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TypeScript compiler wrapper for AST navigation and code generation.
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<h2 id="initializers">Initializers</h2>
<h3 id="getting">Getting</h3>
<p>For example, given the following code:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="kd">const</span> <span class="nx">add</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">a</span><span class="err">:</span> <span class="kr">number</span><span class="p">,</span> <span class="nx">b</span><span class="err">:</span> <span class="kr">number</span><span class="p">)</span> <span class="p">{</span> <span class="k">return</span> <span class="nx">a</span> <span class="o">+</span> <span class="nx">b</span><span class="p">;</span> <span class="p">};</span>
</code></pre>
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<p>The initializer can be retrieved in any of these ways:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">variableDeclaration</span><span class="p">.</span><span class="nx">getInitializer</span><span class="p">();</span> <span class="c1">// returns: Expression | undefined</span>
<span class="nx">variableDeclaration</span><span class="p">.</span><span class="nx">getInitializerOrThrow</span><span class="p">();</span> <span class="c1">// returns: Expression</span>
<span class="nx">variableDeclaration</span><span class="p">.</span><span class="nx">getInitializerIfKind</span><span class="p">(</span><span class="nx">ts</span><span class="p">.</span><span class="nx">SyntaxKind</span><span class="p">.</span><span class="nx">FunctionExpression</span><span class="p">);</span> <span class="c1">// returns: Expression | undefined</span>
<span class="nx">variableDeclaration</span><span class="p">.</span><span class="nx">getInitializerIfKindOrThrow</span><span class="p">(</span><span class="nx">ts</span><span class="p">.</span><span class="nx">SyntaxKind</span><span class="p">.</span><span class="nx">FunctionExpression</span><span class="p">);</span> <span class="c1">// returns: Expression</span>
</code></pre>
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<p>In a future release, <code class="highlighter-rouge">getInitializerIfKind</code> will be limited to only the supported syntax kinds of <code class="highlighter-rouge">Expression</code> and will return the type of the provided syntax kind (follow issue #138 for details).</p>
<h3 id="removing">Removing</h3>
<p>Use <code class="highlighter-rouge">.removeInitializer()</code> on the parent node. For example:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">variableDeclaration</span><span class="p">.</span><span class="nx">removeInitializer</span><span class="p">();</span>
</code></pre>
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<h3 id="setting">Setting</h3>
<p>Use <code class="highlighter-rouge">.setInitializer(...)</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="nx">variableDeclaration</span><span class="p">.</span><span class="nx">setInitializer</span><span class="p">(</span><span class="s2">"2 + 2"</span><span class="p">);</span>
</code></pre>
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