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1 | // Copyright (c) 2001-2011 Hartmut Kaiser |
2 | // | |
3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
6 | #if !defined(BOOST_SPIRIT_KARMA_OSTREAM_ITERATOR_MAY_26_2007_1016PM) | |
7 | #define BOOST_SPIRIT_KARMA_OSTREAM_ITERATOR_MAY_26_2007_1016PM | |
8 | ||
9 | #if defined(_MSC_VER) | |
10 | #pragma once | |
11 | #endif | |
12 | ||
13 | #include <iterator> | |
14 | ||
15 | /////////////////////////////////////////////////////////////////////////////// | |
16 | namespace boost { namespace spirit { namespace karma | |
17 | { | |
18 | /////////////////////////////////////////////////////////////////////////// | |
19 | // We need our own implementation of an ostream_iterator just to be able | |
20 | // to access the wrapped ostream, which is necessary for the | |
21 | // stream_generator, where we must generate the output using the original | |
22 | // ostream to retain possibly registered facets. | |
23 | /////////////////////////////////////////////////////////////////////////// | |
24 | template < | |
25 | typename T, typename Elem = char | |
26 | , typename Traits = std::char_traits<Elem> > | |
27 | class ostream_iterator | |
28 | : public std::iterator<std::output_iterator_tag, void, void, void, void> | |
29 | { | |
30 | public: | |
31 | typedef Elem char_type; | |
32 | typedef Traits traits_type; | |
33 | typedef std::basic_ostream<Elem, Traits> ostream_type; | |
34 | typedef ostream_iterator<T, Elem, Traits> self_type; | |
35 | ||
36 | ostream_iterator(ostream_type& os_, Elem const* delim_ = 0) | |
37 | : os(&os_), delim(delim_) {} | |
38 | ||
39 | self_type& operator= (T const& val) | |
40 | { | |
41 | *os << val; | |
42 | if (0 != delim) | |
43 | *os << delim; | |
44 | return *this; | |
45 | } | |
46 | ||
47 | self_type& operator*() { return *this; } | |
48 | self_type& operator++() { return *this; } | |
49 | self_type operator++(int) { return *this; } | |
50 | ||
51 | // expose underlying stream | |
52 | ostream_type& get_ostream() { return *os; } | |
53 | ostream_type const& get_ostream() const { return *os; } | |
54 | ||
55 | // expose good bit of underlying stream object | |
56 | bool good() const { return get_ostream().good(); } | |
57 | ||
58 | protected: | |
59 | ostream_type *os; | |
60 | Elem const* delim; | |
61 | }; | |
62 | ||
63 | }}} | |
64 | ||
65 | #endif |