// Copyright Neil Groves 2009. Use, modification and // distribution is subject to 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) // // // For more information, see http://www.boost.org/libs/range/ // #ifndef BOOST_RANGE_ALGORITHM_FIND_IF_HPP_INCLUDED #define BOOST_RANGE_ALGORITHM_FIND_IF_HPP_INCLUDED #include <boost/concept_check.hpp> #include <boost/range/begin.hpp> #include <boost/range/end.hpp> #include <boost/range/concepts.hpp> #include <boost/range/detail/range_return.hpp> #include <algorithm> namespace boost { namespace range { /// \brief template function find_if /// /// range-based version of the find_if std algorithm /// /// \pre SinglePassRange is a model of the SinglePassRangeConcept /// \pre UnaryPredicate is a model of the UnaryPredicateConcept template< class SinglePassRange, class UnaryPredicate > inline BOOST_DEDUCED_TYPENAME disable_if< is_const<SinglePassRange>, BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type >::type find_if( SinglePassRange& rng, UnaryPredicate pred ) { BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> )); return std::find_if(boost::begin(rng), boost::end(rng), pred); } /// \overload template< class SinglePassRange, class UnaryPredicate > inline BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange>::type find_if( const SinglePassRange& rng, UnaryPredicate pred ) { BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> )); return std::find_if(boost::begin(rng), boost::end(rng), pred); } // range_return overloads /// \overload template< range_return_value re, class SinglePassRange, class UnaryPredicate > inline BOOST_DEDUCED_TYPENAME disable_if< is_const<SinglePassRange>, BOOST_DEDUCED_TYPENAME range_return<SinglePassRange,re>::type >::type find_if( SinglePassRange& rng, UnaryPredicate pred ) { BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> )); return range_return<SinglePassRange,re>:: pack(std::find_if(boost::begin(rng), boost::end(rng), pred), rng); } /// \overload template< range_return_value re, class SinglePassRange, class UnaryPredicate > inline BOOST_DEDUCED_TYPENAME range_return<const SinglePassRange,re>::type find_if( const SinglePassRange& rng, UnaryPredicate pred ) { BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> )); return range_return<const SinglePassRange,re>:: pack(std::find_if(boost::begin(rng), boost::end(rng), pred), rng); } } // namespace range using range::find_if; } // namespace boost #endif // include guard