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_FILL_N_HPP_INCLUDED
10 #define BOOST_RANGE_ALGORITHM_FILL_N_HPP_INCLUDED
11
12 #include <boost/assert.hpp>
13 #include <boost/concept_check.hpp>
14 #include <boost/range/begin.hpp>
15 #include <boost/range/end.hpp>
16 #include <boost/range/concepts.hpp>
17 #include <algorithm>
18
19 namespace boost
20 {
21 namespace range
22 {
23
24 /// \brief template function fill_n
25 ///
26 /// range-based version of the fill_n std algorithm
27 ///
28 /// \pre ForwardRange is a model of the ForwardRangeConcept
29 /// \pre n <= std::distance(boost::begin(rng), boost::end(rng))
30 template< class ForwardRange, class Size, class Value >
fill_n(ForwardRange & rng,Size n,const Value & val)31 inline ForwardRange& fill_n(ForwardRange& rng, Size n, const Value& val)
32 {
33 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
34 BOOST_ASSERT( static_cast<Size>(std::distance(boost::begin(rng), boost::end(rng))) >= n );
35 std::fill_n(boost::begin(rng), n, val);
36 return rng;
37 }
38
39 /// \overload
40 template< class ForwardRange, class Size, class Value >
fill_n(const ForwardRange & rng,Size n,const Value & val)41 inline const ForwardRange& fill_n(const ForwardRange& rng, Size n, const Value& val)
42 {
43 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
44 BOOST_ASSERT( static_cast<Size>(std::distance(boost::begin(rng), boost::end(rng))) >= n );
45 std::fill_n(boost::begin(rng), n, val);
46 return rng;
47 }
48
49 } // namespace range
50 using range::fill_n;
51 } // namespace boost
52
53 #endif // include guard
54