52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
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// Copyright (C) 2009-2012 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/local_function
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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/local_function.hpp>
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#include <boost/typeof/typeof.hpp>
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#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
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#include <boost/detail/lightweight_test.hpp>
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#include <vector>
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#include <algorithm>
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struct adder;
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BOOST_TYPEOF_REGISTER_TYPE(adder) // Register before `bind this_` below.
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//[add_this
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struct adder {
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adder() : sum_(0) {}
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int sum(const std::vector<int>& nums, const int factor = 10) {
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void BOOST_LOCAL_FUNCTION(const bind factor, bind this_, int num) {
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this_->sum_ += factor * num; // Use `this_` instead of `this`.
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} BOOST_LOCAL_FUNCTION_NAME(add)
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std::for_each(nums.begin(), nums.end(), add);
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return sum_;
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}
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private:
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int sum_;
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};
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//]
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int main(void) {
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std::vector<int> v(3);
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v[0] = 1; v[1] = 2; v[2] = 3;
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BOOST_TEST(adder().sum(v) == 60);
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return boost::report_errors();
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}
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#endif // VARIADIC_MACROS
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