75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
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///////////////////////////////////////////////////////////////////////////////
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// foreach.hpp header file
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//
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// Copyright 2010 Eric Niebler.
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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// See http://www.boost.org/libs/foreach for documentation
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//
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// Credits:
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// Kazutoshi Satoda: for suggesting the need for a _fwd header for foreach's
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// customization points.
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#ifndef BOOST_FOREACH_FWD_HPP
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#define BOOST_FOREACH_FWD_HPP
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#include <utility> // for std::pair
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// This must be at global scope, hence the uglified name
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enum boost_foreach_argument_dependent_lookup_hack
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{
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boost_foreach_argument_dependent_lookup_hack_value
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};
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namespace boost
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{
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namespace foreach
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{
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template<typename T>
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std::pair<T, T> in_range(T begin, T end);
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///////////////////////////////////////////////////////////////////////////////
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// boost::foreach::tag
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//
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typedef boost_foreach_argument_dependent_lookup_hack tag;
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///////////////////////////////////////////////////////////////////////////////
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// boost::foreach::is_lightweight_proxy
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// Specialize this for user-defined collection types if they are inexpensive to copy.
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// This tells BOOST_FOREACH it can avoid the rvalue/lvalue detection stuff.
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template<typename T>
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struct is_lightweight_proxy;
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///////////////////////////////////////////////////////////////////////////////
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// boost::foreach::is_noncopyable
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// Specialize this for user-defined collection types if they cannot be copied.
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// This also tells BOOST_FOREACH to avoid the rvalue/lvalue detection stuff.
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template<typename T>
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struct is_noncopyable;
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} // namespace foreach
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// Workaround for unfortunate https://svn.boost.org/trac/boost/ticket/6131
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namespace BOOST_FOREACH
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{
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using foreach::in_range;
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using foreach::tag;
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template<typename T>
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struct is_lightweight_proxy
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: foreach::is_lightweight_proxy<T>
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{};
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template<typename T>
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struct is_noncopyable
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: foreach::is_noncopyable<T>
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{};
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} // namespace BOOST_FOREACH
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} // namespace boost
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#endif
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