ceph/src/boost/libs/core/test/visit_each_test.cpp

   1 //
   2 // visit_each_test.cpp
   3 //
   4 // Copyright 2014 Peter Dimov
   5 //
   6 // Distributed under the Boost Software License, Version 1.0.
   7 // See accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt
   9 //
  10
  11 #include <boost/visit_each.hpp>
  12 #include <boost/core/lightweight_test.hpp>
  13 #include <string>
  14
  15 struct X
  16 {
  17     int v;
  18     std::string w;
  19 };
  20
  21 template<class Visitor> inline void visit_each( Visitor & visitor, X const & x )
  22 {
  23     using boost::visit_each;
  24
  25     visit_each( visitor, x.v );
  26     visit_each( visitor, x.w );
  27 }
  28
  29 struct V
  30 {
  31     int s_;
  32
  33     V(): s_( 0 )
  34     {
  35     }
  36
  37     template< class T > void operator()( T const & t )
  38     {
  39     }
  40
  41     void operator()( int const & v )
  42     {
  43         s_ = s_ * 10 + v;
  44     }
  45
  46     void operator()( std::string const & w )
  47     {
  48         s_ = s_ * 10 + w.size();
  49     }
  50 };
  51
  52 int main()
  53 {
  54     X x = { 5, "test" };
  55     V v;
  56
  57     {
  58         using boost::visit_each;
  59         visit_each( v, x );
  60     }
  61
  62     BOOST_TEST( v.s_ == 54 );
  63
  64     return boost::report_errors();
  65 }