ceph/src/boost/boost/qvm/detail/vec_assign.hpp

   1 //Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc.
   2
   3 //Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef UUID_185557CE385511E780ACD7B781262D2E
   7 #define UUID_185557CE385511E780ACD7B781262D2E
   8
   9 #include <boost/qvm/gen/vec_assign2.hpp>
  10 #include <boost/qvm/gen/vec_assign3.hpp>
  11 #include <boost/qvm/gen/vec_assign4.hpp>
  12
  13 namespace
  14 boost
  15     {
  16     namespace
  17     qvm
  18         {
  19         namespace
  20         qvm_detail
  21             {
  22             template <int D>
  23             struct
  24             assign_vv_defined
  25                 {
  26                 static bool const value=false;
  27                 };
  28
  29             template <int I,int N>
  30             struct
  31             copy_vector_elements
  32                 {
  33                 template <class A,class B>
  34                 static
  35                 void
  36                 f( A & a, B const & b )
  37                     {
  38                     vec_traits<A>::template write_element<I>(a)=vec_traits<B>::template read_element<I>(b);
  39                     copy_vector_elements<I+1,N>::f(a,b);
  40                     }
  41                 };
  42
  43             template <int N>
  44             struct
  45             copy_vector_elements<N,N>
  46                 {
  47                 template <class A,class B>
  48                 static
  49                 void
  50                 f( A &, B const & )
  51                     {
  52                     }
  53                 };
  54             }
  55
  56         template <class A,class B>
  57         inline
  58         typename boost::enable_if_c<
  59             is_vec<A>::value && is_vec<B>::value &&
  60             vec_traits<A>::dim==vec_traits<B>::dim &&
  61             !qvm_detail::assign_vv_defined<vec_traits<A>::dim>::value,
  62             A &>::type
  63         assign( A & a, B const & b )
  64             {
  65             qvm_detail::copy_vector_elements<0,vec_traits<A>::dim>::f(a,b);
  66             return a;
  67             }
  68         }
  69     }
  70
  71 #endif