title: Change only a specific option with clang-format in C++ source file
body: <p>I need to change only PointerAlignment with clang-format and leave all the other options unchanged. Is it possible?</p>
  
  <p>I tried the following file:</p>
  
  <pre><code>BasedOnStyle: Google
  IndentWidth: 4
  Language: Cpp
  # Force pointers to the type for C++.
  DerivePointerAlignment: false
  PointerAlignment: Left
  </code></pre>
  
  <p>it changes PointerAlignment, but applies Google style. Also I tried</p>
  
  <pre><code>BasedOnStyle: none
  </code></pre>
  
  <p>but it does not work.</p>