title: Template Haskell in GHCI
body: <p>I'm new at learning Haskell so I'll say sorry in advance for the silly questions.<br />
  I want to build a function that removes all the upper cases from a string (I use GHCI)</p>
  
  <pre><code>removeUppercase st = [c| c&lt;-st, c 'elem' ['A..'Z']]
  </code></pre>
  
  <p>But when I compile it, it shows the following message: </p>
  
  <pre><code>Syntax error on 'elem' 
  Perhaps you intended to use TemplateHaskell
  In the Template Haskell quotation 'elem'
  </code></pre>
  
  <p>What am I doing wrong? </p>