82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
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// Copyright 2002 The Trustees of Indiana University.
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Boost.MultiArray Library
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// Authors: Ronald Garcia
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// Jeremy Siek
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// Andrew Lumsdaine
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// See http://www.boost.org/libs/multi_array for documentation.
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#ifndef BOOST_INDEX_GEN_RG071801_HPP
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#define BOOST_INDEX_GEN_RG071801_HPP
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#include "boost/array.hpp"
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#include "boost/multi_array/index_range.hpp"
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#include "boost/multi_array/range_list.hpp"
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#include "boost/multi_array/types.hpp"
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#include <algorithm>
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#include <cstddef>
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namespace boost {
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namespace detail {
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namespace multi_array {
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template <int NumRanges, int NumDims>
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struct index_gen {
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private:
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typedef ::boost::detail::multi_array::index index;
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typedef ::boost::detail::multi_array::size_type size_type;
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typedef index_range<index,size_type> range;
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public:
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template <int Dims, int Ranges>
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struct gen_type {
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typedef index_gen<Ranges,Dims> type;
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};
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typedef typename range_list_generator<range,NumRanges>::type range_list;
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range_list ranges_;
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index_gen() { }
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template <int ND>
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explicit index_gen(const index_gen<NumRanges-1,ND>& rhs,
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const range& r)
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{
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std::copy(rhs.ranges_.begin(),rhs.ranges_.end(),ranges_.begin());
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*ranges_.rbegin() = r;
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}
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index_gen<NumRanges+1,NumDims+1>
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operator[](const range& r) const
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{
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index_gen<NumRanges+1,NumDims+1> tmp;
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std::copy(ranges_.begin(),ranges_.end(),tmp.ranges_.begin());
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*tmp.ranges_.rbegin() = r;
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return tmp;
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}
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index_gen<NumRanges+1,NumDims>
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operator[](index idx) const
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{
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index_gen<NumRanges+1,NumDims> tmp;
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std::copy(ranges_.begin(),ranges_.end(),tmp.ranges_.begin());
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*tmp.ranges_.rbegin() = range(idx);
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return tmp;
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}
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static index_gen<0,0> indices() {
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return index_gen<0,0>();
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}
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};
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} // namespace multi_array
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} // namespace detail
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} // namespace boost
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#endif // BOOST_INDEX_GEN_RG071801_HPP
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