boost/qvm/vec.hpp

0001 #ifndef BOOST_QVM_VEC_HPP_INCLUDED
0002 #define BOOST_QVM_VEC_HPP_INCLUDED
0003
0004 // Copyright 2008-2022 Emil Dotchevski and Reverge Studios, Inc.
0005
0006 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0007 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0008
0009 #include <boost/qvm/detail/vec_assign.hpp>
0010 #include <boost/qvm/assert.hpp>
0011 #include <boost/qvm/static_assert.hpp>
0012
0013 namespace boost { namespace qvm {
0014
0015 template <class T,int D>
0016 struct
0017 vec
0018     {
0019     T a[D];
0020     template <class R
0021 #if __cplusplus >= 201103L
0022         , class = typename enable_if<is_vec<R> >::type
0023 #endif
0024     >
0025     operator R() const
0026         {
0027         R r;
0028         assign(r,*this);
0029         return r;
0030         }
0031     };
0032
0033 template <class V>
0034 struct vec_traits;
0035
0036 template <class T,int Dim>
0037 struct
0038 vec_traits< vec<T,Dim> >
0039     {
0040     typedef vec<T,Dim> this_vector;
0041     typedef T scalar_type;
0042     static int const dim=Dim;
0043
0044     template <int I>
0045     static
0046     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0047     scalar_type
0048     read_element( this_vector const & x )
0049         {
0050         BOOST_QVM_STATIC_ASSERT(I>=0);
0051         BOOST_QVM_STATIC_ASSERT(I<dim);
0052         return x.a[I];
0053         }
0054
0055     template <int I>
0056     static
0057     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0058     scalar_type &
0059     write_element( this_vector & x )
0060         {
0061         BOOST_QVM_STATIC_ASSERT(I>=0);
0062         BOOST_QVM_STATIC_ASSERT(I<dim);
0063         return x.a[I];
0064         }
0065
0066     static
0067     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0068     scalar_type
0069     read_element_idx( int i, this_vector const & x )
0070         {
0071         BOOST_QVM_ASSERT(i>=0);
0072         BOOST_QVM_ASSERT(i<dim);
0073         return x.a[i];
0074         }
0075
0076     static
0077     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
0078     scalar_type &
0079     write_element_idx( int i, this_vector & x )
0080         {
0081         BOOST_QVM_ASSERT(i>=0);
0082         BOOST_QVM_ASSERT(i<dim);
0083         return x.a[i];
0084         }
0085     };
0086
0087 } }
0088
0089 #endif