Squashed 'third_party/eigen/' content from commit 61d72f6
Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/Eigen/src/Eigen2Support/QR.h b/Eigen/src/Eigen2Support/QR.h
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+++ b/Eigen/src/Eigen2Support/QR.h
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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
+// Copyright (C) 2011 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/.
+
+#ifndef EIGEN2_QR_H
+#define EIGEN2_QR_H
+
+namespace Eigen {
+
+template<typename MatrixType>
+class QR : public HouseholderQR<MatrixType>
+{
+ public:
+
+ typedef HouseholderQR<MatrixType> Base;
+ typedef Block<const MatrixType, MatrixType::ColsAtCompileTime, MatrixType::ColsAtCompileTime> MatrixRBlockType;
+
+ QR() : Base() {}
+
+ template<typename T>
+ explicit QR(const T& t) : Base(t) {}
+
+ template<typename OtherDerived, typename ResultType>
+ bool solve(const MatrixBase<OtherDerived>& b, ResultType *result) const
+ {
+ *result = static_cast<const Base*>(this)->solve(b);
+ return true;
+ }
+
+ MatrixType matrixQ(void) const {
+ MatrixType ret = MatrixType::Identity(this->rows(), this->cols());
+ ret = this->householderQ() * ret;
+ return ret;
+ }
+
+ bool isFullRank() const {
+ return true;
+ }
+
+ const TriangularView<MatrixRBlockType, UpperTriangular>
+ matrixR(void) const
+ {
+ int cols = this->cols();
+ return MatrixRBlockType(this->matrixQR(), 0, 0, cols, cols).template triangularView<UpperTriangular>();
+ }
+};
+
+/** \return the QR decomposition of \c *this.
+ *
+ * \sa class QR
+ */
+template<typename Derived>
+const QR<typename MatrixBase<Derived>::PlainObject>
+MatrixBase<Derived>::qr() const
+{
+ return QR<PlainObject>(eval());
+}
+
+} // end namespace Eigen
+
+#endif // EIGEN2_QR_H