text: // Copyright 2008-2022 Emil Dotchevski and Reverge Studios, Inc.
  
  // Distributed under the Boost Software License, Version 1.0. (See accompanying
  // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  
  #ifdef BOOST_QVM_TEST_SINGLE_HEADER
  #   include BOOST_QVM_TEST_SINGLE_HEADER
  #else
  #   include <boost/qvm/vec_operations.hpp>
  #   include <boost/qvm/vec.hpp>
  #endif
  
  #include "test_qvm_vector.hpp"
  #include "gold.hpp"
  
  namespace
      {
      template <class T,class U> struct same_type_tester;
      template <class T> struct same_type_tester<T,T> { };
      template <class T,class U> void test_same_type( T, U ) { same_type_tester<T,U>(); }
  
      template <int Dim>
      void
      test()
          {
          using namespace boost::qvm::sfinae;
          test_qvm::vector<V1,Dim> const x(42,2);
              {
              test_qvm::vector<V1,Dim> const y(42,1);
              test_same_type(x,x-y);
              test_qvm::vector<V1,Dim> r=x-y;
              test_qvm::subtract_v(r.b,x.b,y.b);
              BOOST_QVM_TEST_EQ(r.a,r.b);
              }
              {
              test_qvm::vector<V1,Dim> const y(42,1);
              test_qvm::vector<V2,Dim> r=vref(x)-y;
              test_qvm::subtract_v(r.b,x.b,y.b);
              BOOST_QVM_TEST_EQ(r.a,r.b);
              }
              {
              test_qvm::vector<V1,Dim> const y(42,1);
              test_qvm::vector<V2,Dim> r=x-vref(y);
              test_qvm::subtract_v(r.b,x.b,y.b);
              BOOST_QVM_TEST_EQ(r.a,r.b);
              }
          }
      }
  
  int
  main()
      {
      test<2>();
      test<3>();
      test<4>();
      test<5>();
      return boost::report_errors();
      }
  