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_LEXICOGRAPHICAL_COMPARE_HPP_INCLUDED
10#define BOOST_RANGE_ALGORITHM_LEXICOGRAPHICAL_COMPARE_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 <algorithm>
17
18namespace boost
19{
20 namespace range
21 {
22
23/// \brief template function lexicographic_compare
24///
25/// range-based version of the lexicographic_compare std algorithm
26///
27/// \pre SinglePassRange1 is a model of the SinglePassRangeConcept
28/// \pre SinglePassRange2 is a model of the SinglePassRangeConcept
29template<class SinglePassRange1, class SinglePassRange2>
30inline bool lexicographical_compare(const SinglePassRange1& rng1,
31 const SinglePassRange2& rng2)
32{
33 BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> ));
34 BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange2> ));
35 return std::lexicographical_compare(
36 boost::begin(rng1), boost::end(rng1),
37 boost::begin(rng2), boost::end(rng2));
38}
39
40/// \overload
41template<class SinglePassRange1, class SinglePassRange2,
42 class BinaryPredicate>
43inline bool lexicographical_compare(const SinglePassRange1& rng1,
44 const SinglePassRange2& rng2,
45 BinaryPredicate pred)
46{
47 BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> ));
48 BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange2> ));
49 return std::lexicographical_compare(
50 boost::begin(rng1), boost::end(rng1),
51 boost::begin(rng2), boost::end(rng2), pred);
52}
53
54 } // namespace range
55 using range::lexicographical_compare;
56} // namespace boost
57
58#endif // include guard
59

source code of boost/libs/range/include/boost/range/algorithm/lexicographical_compare.hpp