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- /*
- Copyright 2019 Glen Joseph Fernandes
- (glenjofe@gmail.com)
- Distributed under the Boost Software License, Version 1.0.
- (http://www.boost.org/LICENSE_1_0.txt)
- */
- #include <boost/config.hpp>
- #if !defined(BOOST_NO_CXX11_SMART_PTR) && !defined(BOOST_NO_CXX11_ALLOCATOR)
- #include <boost/smart_ptr/allocate_unique.hpp>
- #include <boost/core/lightweight_test.hpp>
- struct allow { };
- template<class T = void>
- struct creator {
- typedef T value_type;
- template<class U>
- struct rebind {
- typedef creator<U> other;
- };
- creator() { }
- template<class U>
- creator(const creator<U>&) { }
- T* allocate(std::size_t size) {
- return static_cast<T*>(::operator new(sizeof(T) * size));
- }
- void deallocate(T* ptr, std::size_t) {
- ::operator delete(ptr);
- }
- template<class U>
- void construct(U* ptr) {
- ::new(static_cast<void*>(ptr)) U(allow());
- }
- template<class U>
- void destroy(U* ptr) {
- ptr->~U();
- }
- };
- template<class T, class U>
- inline bool
- operator==(const creator<T>&, const creator<U>&)
- {
- return true;
- }
- template<class T, class U>
- inline bool
- operator!=(const creator<T>&, const creator<U>&)
- {
- return false;
- }
- class type {
- public:
- static unsigned instances;
- explicit type(allow) {
- ++instances;
- }
- ~type() {
- --instances;
- }
- private:
- type(const type&);
- type& operator=(const type&);
- };
- unsigned type::instances = 0;
- int main()
- {
- {
- std::unique_ptr<type,
- boost::alloc_deleter<type, creator<type> > > result =
- boost::allocate_unique<type>(creator<type>());
- BOOST_TEST(result.get() != 0);
- BOOST_TEST(type::instances == 1);
- result.reset();
- BOOST_TEST(type::instances == 0);
- }
- {
- std::unique_ptr<const type,
- boost::alloc_deleter<const type, creator<> > > result =
- boost::allocate_unique<const type>(creator<>());
- BOOST_TEST(result.get() != 0);
- BOOST_TEST(type::instances == 1);
- result.reset();
- BOOST_TEST(type::instances == 0);
- }
- return boost::report_errors();
- }
- #else
- int main()
- {
- return 0;
- }
- #endif
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