// Copyright 2002 The Trustees of Indiana University. // Use, modification and distribution is subject to 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) // Boost.MultiArray Library // Authors: Ronald Garcia // Jeremy Siek // Andrew Lumsdaine // See http://www.boost.org/libs/multi_array for documentation. #ifndef BOOST_EXTENT_GEN_RG071801_HPP #define BOOST_EXTENT_GEN_RG071801_HPP #include "boost/multi_array/extent_range.hpp" #include "boost/multi_array/range_list.hpp" #include "boost/multi_array/types.hpp" #include "boost/array.hpp" #include <algorithm> namespace boost { namespace detail { namespace multi_array { template <std::size_t NumRanges> class extent_gen { public: typedef boost::detail::multi_array::index index; typedef boost::detail::multi_array::size_type size_type; typedef extent_range<index,size_type> range; private: typedef typename range_list_generator<range,NumRanges>::type range_list; public: template <std::size_t Ranges> struct gen_type { typedef extent_gen<Ranges> type; }; range_list ranges_; extent_gen() { } // Used by operator[] to expand extent_gens extent_gen(const extent_gen<NumRanges-1>& rhs, const range& a_range) { std::copy(rhs.ranges_.begin(),rhs.ranges_.end(),ranges_.begin()); *ranges_.rbegin() = a_range; } extent_gen<NumRanges+1> operator[](const range& a_range) { return extent_gen<NumRanges+1>(*this,a_range); } extent_gen<NumRanges+1> operator[](index idx) { return extent_gen<NumRanges+1>(*this,range(0,idx)); } static extent_gen<0> extents() { return extent_gen<0>(); } }; } // namespace multi_array } // namespace detail } // namespace boost #endif // BOOST_EXTENT_GEN_RG071801_HPP