ceph/src/boost/libs/scope_exit/test/world_tpl_seq.cpp

   1
   2 // Copyright (C) 2006-2009, 2012 Alexander Nasonov
   3 // Copyright (C) 2012 Lorenzo Caminiti
   4 // Distributed under the Boost Software License, Version 1.0
   5 // (see accompanying file LICENSE_1_0.txt or a copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7 // Home at http://www.boost.org/libs/scope_exit
   8
   9 #include <boost/scope_exit.hpp>
  10 #include <boost/typeof/typeof.hpp>
  11 #include <boost/typeof/std/vector.hpp>
  12 #include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
  13 #include <boost/detail/lightweight_test.hpp>
  14 #include <vector>
  15
  16 struct person {};
  17 BOOST_TYPEOF_REGISTER_TYPE(person)
  18
  19 template<typename Person>
  20 struct world {
  21     void add_person(Person const& a_person);
  22     size_t population(void) const { return persons_.size(); }
  23
  24 private:
  25     std::vector<Person> persons_;
  26 };
  27 BOOST_TYPEOF_REGISTER_TEMPLATE(world, 1)
  28
  29 template<typename Person>
  30 void world<Person>::add_person(Person const& a_person) {
  31     bool commit = false;
  32     persons_.push_back(a_person);
  33
  34     BOOST_SCOPE_EXIT_TPL( (&commit) (this_) ) {
  35         if(!commit) this_->persons_.pop_back();
  36     } BOOST_SCOPE_EXIT_END
  37
  38     // ...
  39
  40     commit = true;
  41 }
  42
  43 int main(void) {
  44     world<person> w;
  45     person p;
  46     w.add_person(p);
  47     BOOST_TEST(w.population() == 1);
  48     return boost::report_errors();
  49 }
  50