58 lines
1.2 KiB
C++
58 lines
1.2 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_LAMBDAS
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# error "lambda functions required"
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#else
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#include <boost/detail/lightweight_test.hpp>
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#include <vector>
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struct person {};
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struct world {
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void add_person(person const& a_person);
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std::vector<person> persons_;
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};
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//[world_cxx11_lambda
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#include <functional>
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struct scope_exit {
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scope_exit(std::function<void (void)> f) : f_(f) {}
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~scope_exit(void) { f_(); }
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private:
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std::function<void (void)> f_;
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};
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void world::add_person(person const& a_person) {
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bool commit = false;
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persons_.push_back(a_person);
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scope_exit on_exit1([&commit, this](void) { // Use C++11 lambda.
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if(!commit) persons_.pop_back(); // `persons_` via captured `this`.
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});
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// ...
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commit = true;
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}
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//]
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int main(void) {
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world w;
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person p;
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w.add_person(p);
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BOOST_TEST(w.persons_.size() == 1);
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return boost::report_errors();
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}
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#endif // LAMBDAS
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