| // (C) Copyright Jeremy Siek 2000-2004. |
| // 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) |
| |
| #include <boost/config.hpp> |
| #include <vector> |
| #include <iostream> |
| #include <iterator> |
| #include <functional> |
| #include <algorithm> |
| #include <boost/iterator/indirect_iterator.hpp> |
| |
| int main(int, char*[]) |
| { |
| char characters[] = "abcdefg"; |
| const int N = sizeof(characters)/sizeof(char) - 1; // -1 since characters has a null char |
| char* pointers_to_chars[N]; // at the end. |
| for (int i = 0; i < N; ++i) |
| pointers_to_chars[i] = &characters[i]; |
| |
| // Example of using indirect_iterator |
| |
| boost::indirect_iterator<char**, char> |
| indirect_first(pointers_to_chars), indirect_last(pointers_to_chars + N); |
| |
| std::copy(indirect_first, indirect_last, std::ostream_iterator<char>(std::cout, ",")); |
| std::cout << std::endl; |
| |
| |
| // Example of making mutable and constant indirect iterators |
| |
| char mutable_characters[N]; |
| char* pointers_to_mutable_chars[N]; |
| for (int j = 0; j < N; ++j) |
| pointers_to_mutable_chars[j] = &mutable_characters[j]; |
| |
| boost::indirect_iterator<char* const*> mutable_indirect_first(pointers_to_mutable_chars), |
| mutable_indirect_last(pointers_to_mutable_chars + N); |
| boost::indirect_iterator<char* const*, char const> const_indirect_first(pointers_to_chars), |
| const_indirect_last(pointers_to_chars + N); |
| |
| std::transform(const_indirect_first, const_indirect_last, |
| mutable_indirect_first, std::bind1st(std::plus<char>(), 1)); |
| |
| std::copy(mutable_indirect_first, mutable_indirect_last, |
| std::ostream_iterator<char>(std::cout, ",")); |
| std::cout << std::endl; |
| |
| |
| // Example of using make_indirect_iterator() |
| |
| std::copy(boost::make_indirect_iterator(pointers_to_chars), |
| boost::make_indirect_iterator(pointers_to_chars + N), |
| std::ostream_iterator<char>(std::cout, ",")); |
| std::cout << std::endl; |
| |
| return 0; |
| } |