ceph/src/boost/libs/qvm/test/deduce_scalar_mv_test.cpp

   1 // Copyright 2008-2022 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 #ifdef BOOST_QVM_TEST_SINGLE_HEADER
   7 #   include BOOST_QVM_TEST_SINGLE_HEADER
   8 #else
   9 #   include <boost/qvm/deduce_scalar.hpp>
  10 #   include <boost/qvm/mat.hpp>
  11 #   include <boost/qvm/mat_operations.hpp>
  12 #   include <boost/qvm/vec.hpp>
  13 #   include <boost/qvm/vec_mat_operations3.hpp>
  14 #endif
  15
  16 #include <boost/core/lightweight_test.hpp>
  17
  18 template <class T>
  19 struct
  20 wrap
  21     {
  22     T t;
  23     wrap() { }
  24     explicit wrap(T t):t(t) { }
  25     };
  26
  27 template <class S, class T>
  28 wrap<T>
  29 operator*(S s, wrap<T> w)
  30     {
  31     return wrap<T>(s * w.t);
  32     }
  33
  34 template <class T>
  35 wrap<T> operator+(wrap<T> a, wrap<T> b)
  36     {
  37     return wrap<T>(a.t + b.t);
  38     }
  39
  40 namespace
  41 boost
  42     {
  43     namespace
  44     qvm
  45         {
  46         template <class T>
  47         struct
  48         is_scalar<wrap<T> >
  49             {
  50             static bool const value=true;
  51             };
  52         template <class S, class T>
  53         struct
  54         deduce_scalar<S, wrap<T> >
  55             {
  56             typedef wrap<typename deduce_scalar<S, T>::type> type;
  57             };
  58         }
  59     }
  60
  61 int
  62 main()
  63     {
  64     using namespace boost::qvm;
  65     mat<double, 3, 3> m = rotz_mat<3>(3.14159);
  66     vec<wrap<double>, 3> v;
  67     v.a[0] = wrap<double>(1.0);
  68     v.a[1] = wrap<double>(0);
  69     v.a[2] = wrap<double>(0);
  70     vec<wrap<double>, 3> r = m * v;
  71     BOOST_TEST_LT(fabs(r.a[0].t+1), 0.0001);
  72     BOOST_TEST_LT(fabs(r.a[1].t), 0.0001);
  73     BOOST_TEST_LT(fabs(r.a[2].t), 0.0001);
  74     return boost::report_errors();
  75     }