ceph/src/boost/libs/range/include/boost/range/algorithm_ext/overwrite.hpp

   1 // Boost.Range library
   2 //
   3 //  Copyright Neil Groves 2009. Use, modification and
   4 //  distribution is subject to the Boost Software License, Version
   5 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 //  http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // For more information, see http://www.boost.org/libs/range/
   9 //
  10 #ifndef BOOST_RANGE_ALGORITHM_EXT_OVERWRITE_HPP_INCLUDED
  11 #define BOOST_RANGE_ALGORITHM_EXT_OVERWRITE_HPP_INCLUDED
  12
  13 #include <boost/range/config.hpp>
  14 #include <boost/range/concepts.hpp>
  15 #include <boost/range/difference_type.hpp>
  16 #include <boost/range/iterator.hpp>
  17 #include <boost/range/begin.hpp>
  18 #include <boost/range/end.hpp>
  19 #include <boost/assert.hpp>
  20
  21 namespace boost
  22 {
  23     namespace range
  24     {
  25
  26 template< class SinglePassRange1, class SinglePassRange2 >
  27 inline void overwrite( const SinglePassRange1& from, SinglePassRange2& to )
  28 {
  29     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> ));
  30     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange2> ));
  31
  32     BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange1>::type
  33         i = boost::begin(from), e = boost::end(from);
  34
  35     BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange2>::type
  36         out = boost::begin(to);
  37
  38 #ifndef NDEBUG
  39     BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange2>::type
  40         last_out = boost::end(to);
  41 #endif
  42
  43     for( ; i != e; ++out, ++i )
  44     {
  45 #ifndef NDEBUG
  46         BOOST_ASSERT( out != last_out
  47             && "out of bounds in boost::overwrite()" );
  48 #endif
  49         *out = *i;
  50     }
  51 }
  52
  53 template< class SinglePassRange1, class SinglePassRange2 >
  54 inline void overwrite( const SinglePassRange1& from, const SinglePassRange2& to )
  55 {
  56     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange1> ));
  57     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange2> ));
  58
  59     BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange1>::type
  60         i = boost::begin(from), e = boost::end(from);
  61
  62     BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange2>::type
  63         out = boost::begin(to);
  64
  65 #ifndef NDEBUG
  66     BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange2>::type
  67         last_out = boost::end(to);
  68 #endif
  69
  70     for( ; i != e; ++out, ++i )
  71     {
  72 #ifndef NDEBUG
  73         BOOST_ASSERT( out != last_out
  74             && "out of bounds in boost::overwrite()" );
  75 #endif
  76         *out = *i;
  77     }
  78 }
  79
  80     } // namespace range
  81     using range::overwrite;
  82 } // namespace boost
  83
  84 #endif // include guard