| // 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 |