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Diffstat (limited to 'libs/scope_exit/test/world.cpp')
-rw-r--r-- | libs/scope_exit/test/world.cpp | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/libs/scope_exit/test/world.cpp b/libs/scope_exit/test/world.cpp new file mode 100644 index 0000000000..721475655c --- /dev/null +++ b/libs/scope_exit/test/world.cpp @@ -0,0 +1,58 @@ + +// Copyright (C) 2006-2009, 2012 Alexander Nasonov +// Copyright (C) 2012 Lorenzo Caminiti +// Distributed under the Boost Software License, Version 1.0 +// (see accompanying file LICENSE_1_0.txt or a copy at +// http://www.boost.org/LICENSE_1_0.txt) +// Home at http://www.boost.org/libs/scope_exit + +#include <boost/config.hpp> +#ifdef BOOST_NO_VARIADIC_MACROS +# error "variadic macros required" +#else + +#include <boost/scope_exit.hpp> +#include <boost/typeof/typeof.hpp> +#include <boost/typeof/std/vector.hpp> +#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP() +#include <boost/detail/lightweight_test.hpp> +#include <vector> + +struct person {}; +BOOST_TYPEOF_REGISTER_TYPE(person) + +struct world { + void add_person(person const& a_person); + size_t population(void) const { return persons_.size(); } + +private: + std::vector<person> persons_; +}; +BOOST_TYPEOF_REGISTER_TYPE(world) + +//[world +void world::add_person(person const& a_person) { + bool commit = false; + + persons_.push_back(a_person); // (1) direct action + // Following block is executed when the enclosing scope exits. + BOOST_SCOPE_EXIT(&commit, &persons_) { + if(!commit) persons_.pop_back(); // (2) rollback action + } BOOST_SCOPE_EXIT_END + + // ... // (3) other operations + + commit = true; // (4) disable rollback actions +} +//] + +int main(void) { + world w; + person p; + w.add_person(p); + BOOST_TEST(w.population() == 1); + return boost::report_errors(); +} + +#endif // variadic macros + |