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/Src/Dependencies/Boost/boost/range/algorithm/find_if.hpp

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 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_IF_HPP_INCLUDED
10#define BOOST_RANGE_ALGORITHM_FIND_IF_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
19namespace boost
20{
21    namespace range
22    {
23
24/// \brief template function find_if
25///
26/// range-based version of the find_if std algorithm
27///
28/// \pre SinglePassRange is a model of the SinglePassRangeConcept
29/// \pre UnaryPredicate is a model of the UnaryPredicateConcept
30template< class SinglePassRange, class UnaryPredicate >
31inline BOOST_DEDUCED_TYPENAME disable_if<
32    is_const<SinglePassRange>,
33    BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type
34>::type
35find_if( SinglePassRange& rng, UnaryPredicate pred )
36{
37    BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> ));
38    return std::find_if(boost::begin(rng), boost::end(rng), pred);
39}
40
41/// \overload
42template< class SinglePassRange, class UnaryPredicate >
43inline BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange>::type
44find_if( const SinglePassRange& rng, UnaryPredicate pred )
45{
46    BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> ));
47    return std::find_if(boost::begin(rng), boost::end(rng), pred);
48}
49
50// range_return overloads
51
52/// \overload
53template< range_return_value re, class SinglePassRange, class UnaryPredicate >
54inline BOOST_DEDUCED_TYPENAME disable_if<
55    is_const<SinglePassRange>,
56    BOOST_DEDUCED_TYPENAME range_return<SinglePassRange,re>::type
57>::type
58find_if( SinglePassRange& rng, UnaryPredicate pred )
59{
60    BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> ));
61    return range_return<SinglePassRange,re>::
62        pack(std::find_if(boost::begin(rng), boost::end(rng), pred),
63             rng);
64}
65
66/// \overload
67template< range_return_value re, class SinglePassRange, class UnaryPredicate >
68inline BOOST_DEDUCED_TYPENAME range_return<const SinglePassRange,re>::type
69find_if( const SinglePassRange& rng, UnaryPredicate pred )
70{
71    BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> ));
72    return range_return<const SinglePassRange,re>::
73        pack(std::find_if(boost::begin(rng), boost::end(rng), pred),
74             rng);
75}
76
77    } // namespace range
78    using range::find_if;
79} // namespace boost
80
81#endif // include guard