1///////////////////////////////////////////////////////////////////////////////
2// foreach.hpp header file
3//
4// Copyright 2010 Eric Niebler.
5// Distributed under the Boost Software License, Version 1.0. (See
6// accompanying file LICENSE_1_0.txt or copy at
7// http://www.boost.org/LICENSE_1_0.txt)
8// See http://www.boost.org/libs/foreach for documentation
9//
10// Credits:
11// Kazutoshi Satoda: for suggesting the need for a _fwd header for foreach's
12// customization points.
13
14#ifndef BOOST_FOREACH_FWD_HPP
15#define BOOST_FOREACH_FWD_HPP
16
17// This must be at global scope, hence the uglified name
18enum boost_foreach_argument_dependent_lookup_hack
19{
20 boost_foreach_argument_dependent_lookup_hack_value
21};
22
23namespace boost
24{
25
26namespace foreach
27{
28 ///////////////////////////////////////////////////////////////////////////////
29 // boost::foreach::tag
30 //
31 typedef boost_foreach_argument_dependent_lookup_hack tag;
32
33 ///////////////////////////////////////////////////////////////////////////////
34 // boost::foreach::is_lightweight_proxy
35 // Specialize this for user-defined collection types if they are inexpensive to copy.
36 // This tells BOOST_FOREACH it can avoid the rvalue/lvalue detection stuff.
37 template<typename T>
38 struct is_lightweight_proxy;
39
40 ///////////////////////////////////////////////////////////////////////////////
41 // boost::foreach::is_noncopyable
42 // Specialize this for user-defined collection types if they cannot be copied.
43 // This also tells BOOST_FOREACH to avoid the rvalue/lvalue detection stuff.
44 template<typename T>
45 struct is_noncopyable;
46
47} // namespace foreach
48
49} // namespace boost
50
51#endif
52