/*
    Copyright 2005-2018 Intel Corporation.  All Rights Reserved.

    The source code contained or described herein and all documents related
    to the source code ("Material") are owned by Intel Corporation or its
    suppliers or licensors.  Title to the Material remains with Intel
    Corporation or its suppliers and licensors.  The Material is protected
    by worldwide copyright laws and treaty provisions.  No part of the
    Material may be used, copied, reproduced, modified, published, uploaded,
    posted, transmitted, distributed, or disclosed in any way without
    Intel's prior express written permission.

    No license under any patent, copyright, trade secret or other
    intellectual property right is granted to or conferred upon you by
    disclosure or delivery of the Materials, either expressly, by
    implication, inducement, estoppel or otherwise.  Any license under such
    intellectual property rights must be express and approved by Intel in
    writing.
*/

#ifndef __TBB_range_iterator_H
#define __TBB_range_iterator_H

#include "../tbb_stddef.h"

#if __TBB_CPP11_STD_BEGIN_END_PRESENT && __TBB_CPP11_AUTO_PRESENT && __TBB_CPP11_DECLTYPE_PRESENT
    #include <iterator>
#endif

namespace tbb {
    // iterators to first and last elements of container
    namespace internal {

#if __TBB_CPP11_STD_BEGIN_END_PRESENT && __TBB_CPP11_AUTO_PRESENT && __TBB_CPP11_DECLTYPE_PRESENT
        using std::begin;
        using std::end;
        template<typename Container>
        auto first(Container& c)-> decltype(begin(c))  {return begin(c);}

        template<typename Container>
        auto first(const Container& c)-> decltype(begin(c))  {return begin(c);}

        template<typename Container>
        auto last(Container& c)-> decltype(begin(c))  {return end(c);}

        template<typename Container>
        auto last(const Container& c)-> decltype(begin(c)) {return end(c);}
#else
        template<typename Container>
        typename Container::iterator first(Container& c) {return c.begin();}

        template<typename Container>
        typename Container::const_iterator first(const Container& c) {return c.begin();}

        template<typename Container>
        typename Container::iterator last(Container& c) {return c.end();}

        template<typename Container>
        typename Container::const_iterator last(const Container& c) {return c.end();}
#endif

        template<typename T, size_t size>
        T* first(T (&arr) [size]) {return arr;}

        template<typename T, size_t size>
        T* last(T (&arr) [size]) {return arr + size;}
    } //namespace internal
}  //namespace tbb

#endif // __TBB_range_iterator_H
