title: Setting the vector length in SystemC with a received parameter
body: <p>Im making a xor gate in SystemC, from the binding of four NAND gates. I want the module to receive a vector of N bits, where N is passed as parameter. I should be able to perform <strong>&amp;</strong> and <strong>not</strong> bitwise operations (for the NAND gate).</p>
  
  <p>The best solution may be using <code>sc_bv_base</code> type, but I don't know how to initialize it in the constructor. </p>
  
  <p>How can I create a bit vector using a custom length?</p>