diff options
Diffstat (limited to 'extern/Eigen3/Eigen/src/Core/util/XprHelper.h')
| -rw-r--r-- | extern/Eigen3/Eigen/src/Core/util/XprHelper.h | 60 |
1 files changed, 24 insertions, 36 deletions
diff --git a/extern/Eigen3/Eigen/src/Core/util/XprHelper.h b/extern/Eigen3/Eigen/src/Core/util/XprHelper.h index c2078f13786..2a65c7cbfa4 100644 --- a/extern/Eigen3/Eigen/src/Core/util/XprHelper.h +++ b/extern/Eigen3/Eigen/src/Core/util/XprHelper.h @@ -4,24 +4,9 @@ // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr> // Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com> // -// Eigen is free software; you can redistribute it and/or -// modify it under the terms of the GNU Lesser General Public -// License as published by the Free Software Foundation; either -// version 3 of the License, or (at your option) any later version. -// -// Alternatively, you can redistribute it and/or -// modify it under the terms of the GNU General Public License as -// published by the Free Software Foundation; either version 2 of -// the License, or (at your option) any later version. -// -// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY -// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS -// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the -// GNU General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public -// License and a copy of the GNU General Public License along with -// Eigen. If not, see <http://www.gnu.org/licenses/>. +// 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 EIGEN_XPRHELPER_H #define EIGEN_XPRHELPER_H @@ -37,6 +22,8 @@ #define EIGEN_EMPTY_STRUCT_CTOR(X) #endif +namespace Eigen { + typedef EIGEN_DEFAULT_DENSE_INDEX_TYPE DenseIndex; namespace internal { @@ -260,30 +247,27 @@ template<typename T> struct plain_matrix_type_row_major // we should be able to get rid of this one too template<typename T> struct must_nest_by_value { enum { ret = false }; }; -template<class T> -struct is_reference -{ - enum { ret = false }; -}; - -template<class T> -struct is_reference<T&> -{ - enum { ret = true }; -}; - -/** -* \internal The reference selector for template expressions. The idea is that we don't -* need to use references for expressions since they are light weight proxy -* objects which should generate no copying overhead. -**/ +/** \internal The reference selector for template expressions. The idea is that we don't + * need to use references for expressions since they are light weight proxy + * objects which should generate no copying overhead. */ template <typename T> struct ref_selector { typedef typename conditional< bool(traits<T>::Flags & NestByRefBit), T const&, - T + const T + >::type type; +}; + +/** \internal Adds the const qualifier on the value-type of T2 if and only if T1 is a const type */ +template<typename T1, typename T2> +struct transfer_constness +{ + typedef typename conditional< + bool(internal::is_const<T1>::value), + typename internal::add_const_on_value_type<T2>::type, + T2 >::type type; }; @@ -297,6 +281,8 @@ struct ref_selector * \param T the type of the expression being nested * \param n the number of coefficient accesses in the nested expression for each coefficient access in the bigger expression. * + * Note that if no evaluation occur, then the constness of T is preserved. + * * Example. Suppose that a, b, and c are of type Matrix3d. The user forms the expression a*(b+c). * b+c is an expression "sum of matrices", which we will denote by S. In order to determine how to nest it, * the Product expression uses: nested<S, 3>::ret, which turns out to be Matrix3d because the internal logic of @@ -456,4 +442,6 @@ struct is_lvalue } // end namespace internal +} // end namespace Eigen + #endif // EIGEN_XPRHELPER_H |