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2026-10-22 09:23:54 +08:00
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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2013 Gael Guennebaud <gael.guennebaud@inria.fr>
+//
+// 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 special_numbers() {
+  typedef Matrix<Scalar, Dynamic, Dynamic> MatType;
+  int rows = internal::random<int>(1, 300);
+  int cols = internal::random<int>(1, 300);
+
+  Scalar nan = std::numeric_limits<Scalar>::quiet_NaN();
+  Scalar inf = std::numeric_limits<Scalar>::infinity();
+  Scalar s1 = internal::random<Scalar>();
+
+  MatType m1 = MatType::Random(rows, cols), mnan = MatType::Random(rows, cols), minf = MatType::Random(rows, cols),
+          mboth = MatType::Random(rows, cols);
+
+  int n = internal::random<int>(1, 10);
+  for (int k = 0; k < n; ++k) {
+    mnan(internal::random<int>(0, rows - 1), internal::random<int>(0, cols - 1)) = nan;
+    minf(internal::random<int>(0, rows - 1), internal::random<int>(0, cols - 1)) = inf;
+  }
+  mboth = mnan + minf;
+
+  VERIFY(!m1.hasNaN());
+  VERIFY(m1.allFinite());
+
+  VERIFY(mnan.hasNaN());
+  VERIFY((s1 * mnan).hasNaN());
+  VERIFY(!minf.hasNaN());
+  VERIFY(!(2 * minf).hasNaN());
+  VERIFY(mboth.hasNaN());
+  VERIFY(mboth.array().hasNaN());
+
+  VERIFY(!mnan.allFinite());
+  VERIFY(!minf.allFinite());
+  VERIFY(!(minf - mboth).allFinite());
+  VERIFY(!mboth.allFinite());
+  VERIFY(!mboth.array().allFinite());
+}
+
+EIGEN_DECLARE_TEST(special_numbers) {
+  for (int i = 0; i < 10 * g_repeat; i++) {
+    CALL_SUBTEST_1(special_numbers<float>());
+    CALL_SUBTEST_1(special_numbers<double>());
+  }
+}