39;(&#39; identifier &#39;in&#39; expression &#39;:&#39; expression &#39;)&#39; statement
  | &#39;for&#39; &#39;(&#39; identifier &#39;in&#39; expression &#39;)&#39; statement
  | &#39;{&#39; var_decl* statement+ &#39;}&#39;</code></pre>

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