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- // 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_CXX11_VARIADIC_MACROS
- # error "variadic macros required"
- #else
- #include <boost/scope_exit.hpp>
- #include <boost/typeof/std/string.hpp>
- #include <boost/typeof/std/map.hpp>
- #include <map>
- #include <string>
- #include <utility>
- int main(void) {
- //[scope_guard_decl
- bool commit = false;
- std::string currency("EUR");
- double rate = 1.3326;
- std::map<std::string, double> rates;
- bool currency_rate_inserted =
- rates.insert(std::make_pair(currency, rate)).second;
- // Transaction...
- //]
- //[scope_guard_exit
- BOOST_SCOPE_EXIT(currency_rate_inserted, &commit, &rates, ¤cy) {
- if(currency_rate_inserted && !commit) rates.erase(currency);
- } BOOST_SCOPE_EXIT_END
- // ...
- commit = true;
- //]
-
- return 0;
- }
- #endif // variadic macros
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