boost_smart_ptr/test/allocate_unique_value_test.cpp

/*
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_LIBSTDCXX_VERSION) || \
    BOOST_LIBSTDCXX_VERSION >= 46000) && \
    !defined(BOOST_NO_CXX11_SMART_PTR)
#include <boost/smart_ptr/allocate_unique.hpp>
#include <boost/core/lightweight_test.hpp>

template<class T = void>
struct creator {
    typedef T value_type;
    typedef T* pointer;

    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 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:
    type(int x, int y)
        : value_(x + y) { }

    int sum() const {
        return value_;
    }

private:
    int value_;
};

int main()
{
    {
        std::unique_ptr<int,
            boost::alloc_deleter<int, creator<int> > > result =
            boost::allocate_unique<int>(creator<int>(), 1);
        BOOST_TEST(result.get() != 0);
        BOOST_TEST(*result == 1);
    }
    {
        std::unique_ptr<const int,
            boost::alloc_deleter<const int, creator<> > > result =
            boost::allocate_unique<const int>(creator<>(), 1);
        BOOST_TEST(result.get() != 0);
        BOOST_TEST(*result == 1);
    }
    {
        std::unique_ptr<type,
            boost::alloc_deleter<type, creator<type> > > result =
            boost::allocate_unique<type>(creator<type>(), type(1, 2));
        BOOST_TEST(result.get() != 0);
        BOOST_TEST(result->sum() == 3);
    }
    {
        std::unique_ptr<const type,
            boost::alloc_deleter<const type, creator<> > > result =
            boost::allocate_unique<const type>(creator<>(), type(1, 2));
        BOOST_TEST(result.get() != 0);
        BOOST_TEST(result->sum() == 3);
    }
    return boost::report_errors();
}
#else
int main()
{
    return 0;
}
#endif