osition_cache, and retuns an AST: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="identifier">client</span><span class="special">::</span><span class="identifier">ast</span><span class="special">::</span><span class="identifier">employee</span><span class="special">&gt;</span></code>.
      </p>
<p>
        Inside the parse function, we first create an AST where parsed data will