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

   1 #ifndef BOOST_QVM_DETAIL_VEC_ASSIGN_HPP_INCLUDED
   2 #define BOOST_QVM_DETAIL_VEC_ASSIGN_HPP_INCLUDED
   3
   4 // Copyright 2008-2022 Emil Dotchevski and Reverge Studios, Inc.
   5
   6 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   7 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   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 boost { namespace qvm {
  14
  15 namespace
  16 qvm_detail
  17     {
  18     template <int D>
  19     struct
  20     assign_vv_defined
  21         {
  22         static bool const value=false;
  23         };
  24
  25     template <int I,int N>
  26     struct
  27     copy_vector_elements
  28         {
  29         template <class A,class B>
  30         static
  31         void
  32         f( A & a, B const & b )
  33             {
  34             vec_traits<A>::template write_element<I>(a)=vec_traits<B>::template read_element<I>(b);
  35             copy_vector_elements<I+1,N>::f(a,b);
  36             }
  37         };
  38
  39     template <int N>
  40     struct
  41     copy_vector_elements<N,N>
  42         {
  43         template <class A,class B>
  44         static
  45         void
  46         f( A &, B const & )
  47             {
  48             }
  49         };
  50     }
  51
  52 template <class A,class B>
  53 inline
  54 typename enable_if_c<
  55     is_vec<A>::value && is_vec<B>::value &&
  56     vec_traits<A>::dim==vec_traits<B>::dim &&
  57     !qvm_detail::assign_vv_defined<vec_traits<A>::dim>::value,
  58     A &>::type
  59 assign( A & a, B const & b )
  60     {
  61     qvm_detail::copy_vector_elements<0,vec_traits<A>::dim>::f(a,b);
  62     return a;
  63     }
  64
  65 } }
  66
  67 #endif