</span>
  <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span>                                             <a name="boost.process.basic_environment.size_type"></a><span class="identifier">size_type</span><span class="special">;</span>     
  <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span>                                             <a name="boost.pr