title: using namespace just for initialiser list
body: <p>I have a lot of namespace usage in an initialiser list and would like a <em>using namespace</em> to reduce the verbosity. However the initialiser list is outside the scope of the constructor braces so I would have to place the <em>using</em> outside the constructor and pollute the rest of the file with it. Is there a way to scope the using as I want? Rather than:</p>
  
  <pre><code>MyClass::MyClass() :
      m_one(nsConstants::ONE),
      m_two(nsConstants::TWO),
      m_three(nsConstants::THREE)
  {}
  </code></pre>
  
  <p>I want:</p>
  
  <pre><code>MyClass::MyClass() :
      using namespace nsConstants;
      m_one(ONE),
      m_two(TWO),
      m_three(THREE)
  {}
  </code></pre>
  
  <p>_</p>