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86 lines
2.5 KiB
86 lines
2.5 KiB
// |
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//======================================================================= |
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// Copyright 1997, 1998, 1999, 2000 University of Notre Dame. |
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// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek |
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// |
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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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//======================================================================= |
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// |
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#ifndef BOOST_INDIRECT_CMP_HPP |
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#define BOOST_INDIRECT_CMP_HPP |
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#include <functional> |
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#include <boost/config.hpp> |
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#include <boost/property_map/property_map.hpp> |
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namespace boost { |
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//: indirect_cmp |
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// |
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// could also do this with compose_f_gx_hx, and the member binder... |
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// |
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//!category: functors |
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//!component: type |
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//!tparam: ReadablePropertyMap - a model of ReadablePropertyMap |
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//!definition: functor.h |
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template <class ReadablePropertyMap, class Compare> |
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class indirect_cmp { |
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public: |
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typedef typename boost::property_traits<ReadablePropertyMap>::value_type T; |
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typedef typename boost::property_traits<ReadablePropertyMap>::key_type K; |
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typedef K first_argument_type; |
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typedef K second_argument_type; |
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typedef T result_type; |
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inline indirect_cmp(const ReadablePropertyMap& df, const Compare& c = Compare()) |
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: d(df), cmp(c) { } |
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template <class A, class B> |
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inline bool |
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operator()(const A& u, const B& v) const { |
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T du = get(d, u), dv = get(d, v); |
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return cmp(du, dv); |
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} |
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protected: |
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ReadablePropertyMap d; |
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Compare cmp; |
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}; |
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template <typename Compare, typename ReadablePropertyMap> |
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indirect_cmp<ReadablePropertyMap, Compare> |
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make_indirect_cmp(const Compare& cmp, ReadablePropertyMap pmap) { |
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indirect_cmp<ReadablePropertyMap, Compare> p(pmap, cmp); |
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return p; |
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} |
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template <class ReadablePropertyMap> |
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class indirect_pmap { |
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public: |
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typedef typename boost::property_traits<ReadablePropertyMap>::value_type T; |
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typedef typename boost::property_traits<ReadablePropertyMap>::key_type K; |
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typedef K argument_type; |
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typedef T result_type; |
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inline indirect_pmap(const ReadablePropertyMap& df) |
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: d(df) { } |
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inline T operator()(const K& u) const { |
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return get(d, u); |
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} |
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protected: |
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ReadablePropertyMap d; |
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}; |
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template <typename ReadablePropertyMap> |
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indirect_pmap<ReadablePropertyMap> |
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make_indirect_pmap(ReadablePropertyMap pmap) { |
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indirect_pmap<ReadablePropertyMap> f(pmap); |
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return f; |
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} |
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} // namespace boost |
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#endif // GGCL_INDIRECT_CMP_HPP
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