1 | // (C) Copyright Jeremy Siek 2001. |
2 | // Distributed under the Boost Software License, Version 1.0. (See |
3 | // accompanying file LICENSE_1_0.txt or copy at |
4 | // http://www.boost.org/LICENSE_1_0.txt) |
5 | |
6 | // Revision History: |
7 | |
8 | // 27 Feb 2001 Jeremy Siek |
9 | // Initial checkin. |
10 | |
11 | #ifndef BOOST_FUNCTION_OUTPUT_ITERATOR_HPP |
12 | #define BOOST_FUNCTION_OUTPUT_ITERATOR_HPP |
13 | |
14 | #include <iterator> |
15 | |
16 | namespace boost { |
17 | namespace iterators { |
18 | |
19 | template <class UnaryFunction> |
20 | class function_output_iterator { |
21 | typedef function_output_iterator self; |
22 | public: |
23 | typedef std::output_iterator_tag iterator_category; |
24 | typedef void value_type; |
25 | typedef void difference_type; |
26 | typedef void pointer; |
27 | typedef void reference; |
28 | |
29 | explicit function_output_iterator() {} |
30 | |
31 | explicit function_output_iterator(const UnaryFunction& f) |
32 | : m_f(f) {} |
33 | |
34 | struct output_proxy { |
35 | output_proxy(UnaryFunction& f) : m_f(f) { } |
36 | template <class T> output_proxy& operator=(const T& value) { |
37 | m_f(value); |
38 | return *this; |
39 | } |
40 | UnaryFunction& m_f; |
41 | }; |
42 | output_proxy operator*() { return output_proxy(m_f); } |
43 | self& operator++() { return *this; } |
44 | self& operator++(int) { return *this; } |
45 | private: |
46 | UnaryFunction m_f; |
47 | }; |
48 | |
49 | template <class UnaryFunction> |
50 | inline function_output_iterator<UnaryFunction> |
51 | make_function_output_iterator(const UnaryFunction& f = UnaryFunction()) { |
52 | return function_output_iterator<UnaryFunction>(f); |
53 | } |
54 | |
55 | } // namespace iterators |
56 | |
57 | using iterators::function_output_iterator; |
58 | using iterators::make_function_output_iterator; |
59 | |
60 | } // namespace boost |
61 | |
62 | #endif // BOOST_FUNCTION_OUTPUT_ITERATOR_HPP |
63 | |