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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
// Copyright (C) 2006-2008 Benoit Jacob <jacob@math.jussieu.fr>
//
// 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/>.
#ifndef EIGEN_STATIC_ASSERT_H
#define EIGEN_STATIC_ASSERT_H
/* Some notes on Eigen's static assertion mechanism:
*
* - in EIGEN_STATIC_ASSERT(CONDITION,MSG) the parameter CONDITION must be a compile time boolean
* expression, and MSG an enum listed in struct ei_static_assert<true>
*
* - define EIGEN_NO_STATIC_ASSERT to disable them (and save compilation time)
* in that case, the static assertion is converted to the following runtime assert:
* ei_assert(CONDITION && "MSG")
*
* - currently EIGEN_STATIC_ASSERT can only be used in function scope
*
*/
#ifndef EIGEN_NO_STATIC_ASSERT
#ifdef __GXX_EXPERIMENTAL_CXX0X__
// if native static_assert is enabled, let's use it
#define EIGEN_STATIC_ASSERT(X,MSG) static_assert(X,#MSG)
#else // CXX0X
template<bool condition>
struct ei_static_assert {};
template<>
struct ei_static_assert<true>
{
enum {
you_tried_calling_a_vector_method_on_a_matrix,
you_mixed_vectors_of_different_sizes,
you_mixed_matrices_of_different_sizes,
you_did_a_programming_error
};
};
#define EIGEN_STATIC_ASSERT(CONDITION,MSG) \
if (ei_static_assert<CONDITION ? true : false>::MSG) {}
#endif // CXX0X
#else // EIGEN_NO_STATIC_ASSERT
#define EIGEN_STATIC_ASSERT(CONDITION,MSG) ei_assert((CONDITION) && #MSG)
#endif // EIGEN_NO_STATIC_ASSERT
// static assertion failling if the type \a TYPE is not a vector type
#define EIGEN_STATIC_ASSERT_VECTOR_ONLY(TYPE) EIGEN_STATIC_ASSERT(TYPE::IsVectorAtCompileTime,you_tried_calling_a_vector_method_on_a_matrix)
// static assertion failling if the two vector expression types are not compatible (same fixed-size or dynamic size)
#define EIGEN_STATIC_ASSERT_SAME_VECTOR_SIZE(TYPE0,TYPE1) \
EIGEN_STATIC_ASSERT( \
(int(TYPE0::SizeAtCompileTime)==Eigen::Dynamic \
|| int(TYPE1::SizeAtCompileTime)==Eigen::Dynamic \
|| int(TYPE0::SizeAtCompileTime)==int(TYPE1::SizeAtCompileTime)),\
you_mixed_vectors_of_different_sizes)
// static assertion failling if the two matrix expression types are not compatible (same fixed-size or dynamic size)
#define EIGEN_STATIC_ASSERT_SAME_MATRIX_SIZE(TYPE0,TYPE1) \
EIGEN_STATIC_ASSERT( \
((int(TYPE0::RowsAtCompileTime)==Eigen::Dynamic \
|| int(TYPE1::RowsAtCompileTime)==Eigen::Dynamic \
|| int(TYPE0::RowsAtCompileTime)==int(TYPE1::RowsAtCompileTime)) \
&& (int(TYPE0::ColsAtCompileTime)==Eigen::Dynamic \
|| int(TYPE1::ColsAtCompileTime)==Eigen::Dynamic \
|| int(TYPE0::ColsAtCompileTime)==int(TYPE1::ColsAtCompileTime))),\
you_mixed_matrices_of_different_sizes)
#endif // EIGEN_STATIC_ASSERT_H
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