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author | Anas Nashif <anas.nashif@intel.com> | 2013-08-26 08:15:55 -0400 |
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committer | Anas Nashif <anas.nashif@intel.com> | 2013-08-26 08:15:55 -0400 |
commit | bb4dd8289b351fae6b55e303f189127a394a1edd (patch) | |
tree | 77c9c35a31b1459dd7988c2448e797d142530c41 /boost/property_map/transform_value_property_map.hpp | |
parent | 1a78a62555be32868418fe52f8e330c9d0f95d5a (diff) | |
download | boost-bb4dd8289b351fae6b55e303f189127a394a1edd.tar.gz boost-bb4dd8289b351fae6b55e303f189127a394a1edd.tar.bz2 boost-bb4dd8289b351fae6b55e303f189127a394a1edd.zip |
Imported Upstream version 1.51.0upstream/1.51.0
Diffstat (limited to 'boost/property_map/transform_value_property_map.hpp')
-rw-r--r-- | boost/property_map/transform_value_property_map.hpp | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/boost/property_map/transform_value_property_map.hpp b/boost/property_map/transform_value_property_map.hpp new file mode 100644 index 0000000000..6a7b574a2d --- /dev/null +++ b/boost/property_map/transform_value_property_map.hpp @@ -0,0 +1,67 @@ +// +//======================================================================= +// Author: Philipp Moeller +// +// Copyright 2012, Philipp Moeller +// +// 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) +//======================================================================= +// + +#ifndef BOOST_PROPERTY_MAP_TRANSFORM_VALUE_PROPERTY_MAP_HPP +#define BOOST_PROPERTY_MAP_TRANSFORM_VALUE_PROPERTY_MAP_HPP + +#include <boost/config.hpp> +#include <boost/property_map/property_map.hpp> +#include <boost/type_traits.hpp> +#include <boost/utility/result_of.hpp> +#include <boost/mpl/and.hpp> +#include <boost/mpl/not.hpp> +#include <utility> + +namespace boost { + +template<typename Func, typename PM, typename Ret = typename boost::result_of<const Func(typename property_traits<PM>::reference)>::type> +class transform_value_property_map: public put_get_helper<Ret, transform_value_property_map<Func, PM, Ret> > { + public: + typedef typename property_traits<PM>::key_type key_type; + typedef Ret reference; + typedef typename boost::remove_cv<typename boost::remove_reference<Ret>::type>::type value_type; + + typedef typename boost::mpl::if_< + boost::mpl::and_< + boost::is_reference<Ret>, + boost::mpl::not_<boost::is_const<Ret> > + >, + boost::lvalue_property_map_tag, + boost::readable_property_map_tag>::type + category; + + transform_value_property_map(Func f, PM pm) : f(f), pm(pm) {} + + reference operator[](const key_type& k) const { + return f(get(pm, k)); + } + + private: + Func f; + PM pm; +}; + +template<typename PM, typename Func> +transform_value_property_map<Func, PM> +make_transform_value_property_map(const Func& f, const PM& pm) { + return transform_value_property_map<Func, PM>(f, pm); +} + +template<typename Ret, typename PM, typename Func> +transform_value_property_map<Func, PM, Ret> +make_transform_value_property_map(const Func& f, const PM& pm) { + return transform_value_property_map<Func, PM, Ret>(f, pm); +} + +} // boost + +#endif /* BOOST_PROPERTY_MAP_TRANSFORM_VALUE_PROPERTY_MAP_HPP */ |