eigen/test/smallvectors.cpp

// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#include "main.h"

template <typename Scalar>
void smallVectors() {
  typedef Matrix<Scalar, 1, 2> V2;
  typedef Matrix<Scalar, 3, 1> V3;
  typedef Matrix<Scalar, 1, 4> V4;
  typedef Matrix<Scalar, Dynamic, 1> VX;
  Scalar x1 = internal::random<Scalar>(), x2 = internal::random<Scalar>(), x3 = internal::random<Scalar>(),
         x4 = internal::random<Scalar>();
  V2 v2(x1, x2);
  V3 v3(x1, x2, x3);
  V4 v4(x1, x2, x3, x4);
  VERIFY_IS_APPROX(x1, v2.x());
  VERIFY_IS_APPROX(x1, v3.x());
  VERIFY_IS_APPROX(x1, v4.x());
  VERIFY_IS_APPROX(x2, v2.y());
  VERIFY_IS_APPROX(x2, v3.y());
  VERIFY_IS_APPROX(x2, v4.y());
  VERIFY_IS_APPROX(x3, v3.z());
  VERIFY_IS_APPROX(x3, v4.z());
  VERIFY_IS_APPROX(x4, v4.w());

  VERIFY_RAISES_ASSERT(V3(2, 1))
  VERIFY_RAISES_ASSERT(V3(3, 2))
  VERIFY_RAISES_ASSERT(V4(1, 3))
  VERIFY_RAISES_ASSERT(V4(2, 4))
  VERIFY_RAISES_ASSERT(VX(3, 2))
}

EIGEN_DECLARE_TEST(smallvectors) {
  for (int i = 0; i < g_repeat; i++) {
    CALL_SUBTEST(smallVectors<int>());
    CALL_SUBTEST(smallVectors<float>());
    CALL_SUBTEST(smallVectors<double>());
  }
}