47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
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// Copyright (C) 2006-2009, 2012 Alexander Nasonov
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// Copyright (C) 2012 Lorenzo Caminiti
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// Distributed under the Boost Software License, Version 1.0
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// (see accompanying file LICENSE_1_0.txt or a copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Home at http://www.boost.org/libs/scope_exit
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#include <boost/config.hpp>
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#ifdef BOOST_NO_CXX11_VARIADIC_MACROS
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# error "variadic macros required"
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#else
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#include <boost/scope_exit.hpp>
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#include <boost/typeof/std/string.hpp>
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#include <boost/typeof/std/map.hpp>
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#include <map>
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#include <string>
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#include <utility>
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int main(void) {
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//[scope_guard_decl
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bool commit = false;
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std::string currency("EUR");
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double rate = 1.3326;
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std::map<std::string, double> rates;
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bool currency_rate_inserted =
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rates.insert(std::make_pair(currency, rate)).second;
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// Transaction...
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//]
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//[scope_guard_exit
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BOOST_SCOPE_EXIT(currency_rate_inserted, &commit, &rates, ¤cy) {
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if(currency_rate_inserted && !commit) rates.erase(currency);
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} BOOST_SCOPE_EXIT_END
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// ...
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commit = true;
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//]
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return 0;
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}
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#endif // variadic macros
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