chromium/third_party/eigen3/src/Eigen/src/Core/CwiseUnaryOp.h

// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008-2014 Gael Guennebaud <[email protected]>
// Copyright (C) 2006-2008 Benoit Jacob <[email protected]>
//
// 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_CWISE_UNARY_OP_H
#define EIGEN_CWISE_UNARY_OP_H

// IWYU pragma: private
#include "./InternalHeaderCheck.h"

namespace Eigen {

namespace internal {
traits<CwiseUnaryOp<UnaryOp, XprType>>;
}  // namespace internal

template <typename UnaryOp, typename XprType, typename StorageKind>
class CwiseUnaryOpImpl;

/** \class CwiseUnaryOp
 * \ingroup Core_Module
 *
 * \brief Generic expression where a coefficient-wise unary operator is applied to an expression
 *
 * \tparam UnaryOp template functor implementing the operator
 * \tparam XprType the type of the expression to which we are applying the unary operator
 *
 * This class represents an expression where a unary operator is applied to an expression.
 * It is the return type of all operations taking exactly 1 input expression, regardless of the
 * presence of other inputs such as scalars. For example, the operator* in the expression 3*matrix
 * is considered unary, because only the right-hand side is an expression, and its
 * return type is a specialization of CwiseUnaryOp.
 *
 * Most of the time, this is the only way that it is used, so you typically don't have to name
 * CwiseUnaryOp types explicitly.
 *
 * \sa MatrixBase::unaryExpr(const CustomUnaryOp &) const, class CwiseBinaryOp, class CwiseNullaryOp
 */
template <typename UnaryOp, typename XprType>
class CwiseUnaryOp : public CwiseUnaryOpImpl<UnaryOp, XprType, typename internal::traits<XprType>::StorageKind>,
                     internal::no_assignment_operator { … };

// Generic API dispatcher
template <typename UnaryOp, typename XprType, typename StorageKind>
class CwiseUnaryOpImpl : public internal::generic_xpr_base<CwiseUnaryOp<UnaryOp, XprType> >::type { … };

}  // end namespace Eigen

#endif  // EIGEN_CWISE_UNARY_OP_H