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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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