ceph/src/boost/libs/range/include/boost/range/algorithm/find.hpp

   1 //  Copyright Neil Groves 2009. Use, modification and
   2 //  distribution is subject to the Boost Software License, Version
   3 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5 //
   6 //
   7 // For more information, see http://www.boost.org/libs/range/
   8 //
   9 #ifndef BOOST_RANGE_ALGORITHM_FIND_HPP_INCLUDED
  10 #define BOOST_RANGE_ALGORITHM_FIND_HPP_INCLUDED
  11
  12 #include <boost/concept_check.hpp>
  13 #include <boost/range/begin.hpp>
  14 #include <boost/range/end.hpp>
  15 #include <boost/range/concepts.hpp>
  16 #include <boost/range/detail/range_return.hpp>
  17 #include <algorithm>
  18
  19 namespace boost
  20 {
  21     namespace range
  22     {
  23
  24 /// \brief template function find
  25 ///
  26 /// range-based version of the find std algorithm
  27 ///
  28 /// \pre SinglePassRange is a model of the SinglePassRangeConcept
  29 template< class SinglePassRange, class Value >
  30 inline BOOST_DEDUCED_TYPENAME disable_if<
  31     is_const<SinglePassRange>,
  32     BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type
  33 >::type
  34 find( SinglePassRange& rng, const Value& val )
  35 {
  36     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> ));
  37     return std::find(boost::begin(rng), boost::end(rng), val);
  38 }
  39
  40 /// \overload
  41 template< class SinglePassRange, class Value >
  42 inline BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange>::type
  43 find( const SinglePassRange& rng, const Value& val )
  44 {
  45     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> ));
  46     return std::find(boost::begin(rng), boost::end(rng), val);
  47 }
  48
  49 // range_return overloads
  50
  51 /// \overload
  52 template< range_return_value re, class SinglePassRange, class Value >
  53 inline BOOST_DEDUCED_TYPENAME disable_if<
  54     is_const<SinglePassRange>,
  55     BOOST_DEDUCED_TYPENAME range_return<SinglePassRange,re>::type
  56 >::type
  57 find( SinglePassRange& rng, const Value& val )
  58 {
  59     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> ));
  60     return range_return<SinglePassRange,re>::
  61         pack(std::find(boost::begin(rng), boost::end(rng), val),
  62              rng);
  63 }
  64
  65 /// \overload
  66 template< range_return_value re, class SinglePassRange, class Value >
  67 inline BOOST_DEDUCED_TYPENAME range_return<const SinglePassRange,re>::type
  68 find( const SinglePassRange& rng, const Value& val )
  69 {
  70     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> ));
  71     return range_return<const SinglePassRange,re>::
  72         pack(std::find(boost::begin(rng), boost::end(rng), val),
  73              rng);
  74 }
  75
  76     } // namespace range
  77     using range::find;
  78 }
  79
  80 #endif // include guard