#ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED

#define BOOST_SCOPED_ARRAY_HPP_INCLUDED



//  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.

//  Copyright (c) 2001, 2002 Peter Dimov

//

//  Distributed under the Boost Software License, Version 1.0. (See

//  accompanying file LICENSE_1_0.txt or copy at

//  http://www.boost.org/LICENSE_1_0.txt)

//

//  http://www.boost.org/libs/smart_ptr/scoped_array.htm

//



#include <boost/assert.hpp>

#include <boost/checked_delete.hpp>

#include <boost/config.hpp>   // in case ptrdiff_t not in std



#include <boost/detail/workaround.hpp>



#include <cstddef>            // for std::ptrdiff_t



namespace boost

{



// Debug hooks



#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)



void sp_array_constructor_hook(void * p);

void sp_array_destructor_hook(void * p);



#endif



//  scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to

//  is guaranteed, either on destruction of the scoped_array or via an explicit

//  reset(). Use shared_array or std::vector if your needs are more complex.



template<class T> class scoped_array // noncopyable

{

private:



    T * ptr;



    scoped_array(scoped_array const &);

    scoped_array & operator=(scoped_array const &);



    typedef scoped_array<T> this_type;



public:



    typedef T element_type;



    explicit scoped_array(T * p = 0) : ptr(p) // never throws

    {

#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)

        boost::sp_array_constructor_hook(ptr);

#endif

    }



    ~scoped_array() // never throws

    {

#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)

        boost::sp_array_destructor_hook(ptr);

#endif

        boost::checked_array_delete(ptr);

    }



    void reset(T * p = 0) // never throws

    {

        BOOST_ASSERT(p == 0 || p != ptr); // catch self-reset errors

        this_type(p).swap(*this);

    }



    T & operator[](std::ptrdiff_t i) const // never throws

    {

        BOOST_ASSERT(ptr != 0);

        BOOST_ASSERT(i >= 0);

        return ptr[i];

    }



    T * get() const // never throws

    {

        return ptr;

    }



    // implicit conversion to "bool"



#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)



    operator bool () const

    {

        return ptr != 0;

    }



#elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))

    typedef T * (this_type::*unspecified_bool_type)() const;

    

    operator unspecified_bool_type() const // never throws

    {

        return ptr == 0? 0: &this_type::get;

    }



#else 



    typedef T * this_type::*unspecified_bool_type;



    operator unspecified_bool_type() const // never throws

    {

        return ptr == 0? 0: &this_type::ptr;

    }



#endif



    bool operator! () const // never throws

    {

        return ptr == 0;

    }



    void swap(scoped_array & b) // never throws

    {

        T * tmp = b.ptr;

        b.ptr = ptr;

        ptr = tmp;

    }



};



template<class T> inline void swap(scoped_array<T> & a, scoped_array<T> & b) // never throws

{

    a.swap(b);

}



} // namespace boost



#endif  // #ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED

