96 lines
1.9 KiB
C++
96 lines
1.9 KiB
C++
/*
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Copyright 2007 Tobias Schwinger
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Copyright 2019 Glen Joseph Fernandes
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(glenjofe@gmail.com)
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Distributed under the Boost Software License, Version 1.0.
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(http://www.boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/functional/factory.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <boost/smart_ptr/shared_ptr.hpp>
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class sum {
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public:
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sum(int a, int b)
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: value_(a + b) { }
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int get() const {
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return value_;
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}
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private:
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int value_;
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};
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template<class T>
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class creator {
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public:
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static int count;
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typedef T value_type;
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typedef T* pointer;
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template<class U>
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struct rebind {
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typedef creator<U> other;
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};
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creator() { }
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template<class U>
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creator(const creator<U>&) { }
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T* allocate(std::size_t size) {
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++count;
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return static_cast<T*>(::operator new(sizeof(T) * size));
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}
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void deallocate(T* ptr, std::size_t) {
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--count;
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::operator delete(ptr);
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}
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};
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template<class T>
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int creator<T>::count = 0;
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template<class T, class U>
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inline bool
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operator==(const creator<T>&, const creator<U>&)
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{
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return true;
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}
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template<class T, class U>
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inline bool
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operator!=(const creator<T>&, const creator<U>&)
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{
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return false;
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}
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int main()
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{
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int a = 1;
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int b = 2;
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{
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boost::shared_ptr<sum> s(boost::factory<boost::shared_ptr<sum>,
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creator<void>,
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boost::factory_alloc_for_pointee_and_deleter>()(a, b));
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BOOST_TEST(creator<sum>::count == 1);
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BOOST_TEST(s->get() == 3);
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}
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BOOST_TEST(creator<sum>::count == 0);
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{
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boost::shared_ptr<sum> s(boost::factory<boost::shared_ptr<sum>,
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creator<void>,
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boost::factory_passes_alloc_to_smart_pointer>()(a, b));
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BOOST_TEST(creator<sum>::count == 1);
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BOOST_TEST(s->get() == 3);
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}
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BOOST_TEST(creator<sum>::count == 0);
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return boost::report_errors();
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}
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