range/algorithm/remove_if.hpp

0001 //  Copyright Neil Groves 2009. Use, modification and
0002 //  distribution is subject to the Boost Software License, Version
0003 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0004 //  http://www.boost.org/LICENSE_1_0.txt)
0005 //
0006 //
0007 // For more information, see http://www.boost.org/libs/range/
0008 //
0009 #ifndef BOOST_RANGE_ALGORITHM_REMOVE_IF_HPP_INCLUDED
0010 #define BOOST_RANGE_ALGORITHM_REMOVE_IF_HPP_INCLUDED
0011
0012 #include <boost/concept_check.hpp>
0013 #include <boost/range/begin.hpp>
0014 #include <boost/range/end.hpp>
0015 #include <boost/range/concepts.hpp>
0016 #include <boost/range/detail/range_return.hpp>
0017 #include <algorithm>
0018
0019 namespace boost
0020 {
0021     namespace range
0022     {
0023
0024 /// \brief template function remove_if
0025 ///
0026 /// range-based version of the remove_if std algorithm
0027 ///
0028 /// \pre ForwardRange is a model of the ForwardRangeConcept
0029 /// \pre UnaryPredicate is a model of the UnaryPredicateConcept
0030 template< class ForwardRange, class UnaryPredicate >
0031 inline BOOST_DEDUCED_TYPENAME boost::range_iterator<ForwardRange>::type
0032 remove_if(ForwardRange& rng, UnaryPredicate pred)
0033 {
0034     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
0035     return std::remove_if(boost::begin(rng), boost::end(rng), pred);
0036 }
0037
0038 /// \overload
0039 template< class ForwardRange, class UnaryPredicate >
0040 inline BOOST_DEDUCED_TYPENAME boost::range_iterator<const ForwardRange>::type
0041 remove_if(const ForwardRange& rng, UnaryPredicate pred)
0042 {
0043     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
0044     return std::remove_if(boost::begin(rng), boost::end(rng), pred);
0045 }
0046
0047 // range_return overloads
0048
0049 /// \overload
0050 template< range_return_value re, class ForwardRange, class UnaryPredicate >
0051 inline BOOST_DEDUCED_TYPENAME range_return<ForwardRange,re>::type
0052 remove_if(ForwardRange& rng, UnaryPredicate pred)
0053 {
0054     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
0055     return range_return<ForwardRange,re>::pack(
0056         std::remove_if(boost::begin(rng), boost::end(rng), pred),
0057         rng);
0058 }
0059
0060 /// \overload
0061 template< range_return_value re, class ForwardRange, class UnaryPredicate >
0062 inline BOOST_DEDUCED_TYPENAME range_return<const ForwardRange,re>::type
0063 remove_if(const ForwardRange& rng, UnaryPredicate pred)
0064 {
0065     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
0066     return range_return<const ForwardRange,re>::pack(
0067         std::remove_if(boost::begin(rng), boost::end(rng), pred),
0068         rng);
0069 }
0070
0071     } // namespace range
0072     using range::remove_if;
0073 } // namespace boost
0074
0075 #endif // include guard