/usr/include/TiledArray/expressions/subt_expr.h is in libtiledarray-dev 0.4.4-1.
This file is owned by root:root, with mode 0o644.
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* This file is a part of TiledArray.
* Copyright (C) 2013 Virginia Tech
*
* This program is free software: 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Justus Calvin
* Department of Chemistry, Virginia Tech
*
* subt_expr.h
* Apr 1, 2014
*
*/
#ifndef TILEDARRAY_EXPRESSIONS_SUBT_EXPR_H__INCLUDED
#define TILEDARRAY_EXPRESSIONS_SUBT_EXPR_H__INCLUDED
#include <TiledArray/expressions/binary_expr.h>
#include <TiledArray/expressions/subt_engine.h>
namespace TiledArray {
namespace expressions {
template <typename Left, typename Right>
struct ExprTrait<SubtExpr<Left, Right> > : public BinaryExprTrait<Left, Right, SubtEngine>
{ };
template <typename Left, typename Right>
struct ExprTrait<ScalSubtExpr<Left, Right> > : public BinaryExprTrait<Left, Right, ScalSubtEngine>
{ };
/// Subtraction expression
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
template <typename Left, typename Right>
class SubtExpr : public BinaryExpr<SubtExpr<Left, Right> > {
public:
typedef SubtExpr<Left, Right> SubtExpr_;
typedef BinaryExpr<SubtExpr_> BinaryExpr_; ///< Binary base class type
typedef typename ExprTrait<SubtExpr_>::left_type left_type; ///< The left-hand expression type
typedef typename ExprTrait<SubtExpr_>::right_type right_type; ///< The right-hand expression type
typedef typename ExprTrait<SubtExpr_>::engine_type engine_type; ///< Expression engine type
private:
// Not allowed
SubtExpr_& operator=(const SubtExpr_&);
public:
/// Expression constructor
/// \param left The left-hand expression
/// \param right The right-hand expression
SubtExpr(const left_type& left, const right_type& right) : BinaryExpr_(left, right) { }
/// Copy constructor
/// \param other The expression to be copied
SubtExpr(const SubtExpr_& other) : BinaryExpr_(other) { }
}; // class SubtExpr
/// Subtraction expression
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
template <typename Left, typename Right>
class ScalSubtExpr : public BinaryExpr<ScalSubtExpr<Left, Right> > {
public:
typedef ScalSubtExpr<Left, Right> ScalSubtExpr_; ///< This class type
typedef BinaryExpr<ScalSubtExpr_> BinaryExpr_; ///< Binary base class type
typedef typename ExprTrait<ScalSubtExpr_>::left_type left_type; ///< The left-hand expression type
typedef typename ExprTrait<ScalSubtExpr_>::right_type right_type; ///< The right-hand expression type
typedef typename ExprTrait<ScalSubtExpr_>::engine_type engine_type; ///< Expression engine type
typedef typename ExprTrait<ScalSubtExpr_>::scalar_type scalar_type; ///< Scalar type
private:
scalar_type factor_; ///< The scaling factor
// Not allowed
ScalSubtExpr_& operator=(const ScalSubtExpr_&);
public:
/// Expression constructor
/// \param arg The argument expression
/// \param factor The scaling factor
ScalSubtExpr(const SubtExpr<Left, Right>& arg, const scalar_type factor) :
BinaryExpr_(arg.left(), arg.right()), factor_(factor)
{ }
/// Expression constructor
/// \param arg The scaled expression
/// \param factor The scaling factor
ScalSubtExpr(const ScalSubtExpr_& arg, const scalar_type factor) :
BinaryExpr_(arg), factor_(factor * arg.factor_)
{ }
/// Copy constructor
/// \param other The expression to be copied
ScalSubtExpr(const ScalSubtExpr_& other) :
BinaryExpr_(other), factor_(other.factor_)
{ }
/// Scaling factor accessor
/// \return The scaling factor
scalar_type factor() const { return factor_; }
}; // class ScalSubtExpr
/// Subtraction expression factor
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
/// \param left The left-hand expression object
/// \param right The right-hand expression object
/// \return A subtraction expression object
template <typename Left, typename Right>
inline SubtExpr<Left, Right> operator-(const Expr<Left>& left, const Expr<Right>& right) {
return SubtExpr<Left, Right>(left.derived(), right.derived());
}
/// Scaled-subtraction expression factor
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
/// \tparam Scalar A scalar type
/// \param expr The subtraction expression object
/// \param factor The scaling factor
/// \return A scaled-subtraction expression object
template <typename Left, typename Right, typename Scalar>
inline typename std::enable_if<TiledArray::detail::is_numeric<Scalar>::value,
ScalSubtExpr<Left, Right> >::type
operator*(const SubtExpr<Left, Right>& expr, const Scalar& factor) {
return ScalSubtExpr<Left, Right>(expr, factor);
}
/// Scaled-subtraction expression factor
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
/// \tparam Scalar A scalar type
/// \param factor The scaling factor
/// \param expr The subtraction expression object
/// \return A scaled-subtraction expression object
template <typename Left, typename Right, typename Scalar>
inline typename std::enable_if<TiledArray::detail::is_numeric<Scalar>::value,
ScalSubtExpr<Left, Right> >::type
operator*(const Scalar& factor, const SubtExpr<Left, Right>& expr) {
return ScalSubtExpr<Left, Right>(expr, factor);
}
/// Scaled-subtraction expression factor
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
/// \tparam Scalar A scalar type
/// \param expr The scaled-subtraction expression object
/// \param factor The scaling factor
/// \return A scaled-subtraction expression object
template <typename Left, typename Right, typename Scalar>
inline typename std::enable_if<TiledArray::detail::is_numeric<Scalar>::value,
ScalSubtExpr<Left, Right> >::type
operator*(const ScalSubtExpr<Left, Right>& expr, const Scalar& factor) {
return ScalSubtExpr<Left, Right>(expr, factor);
}
/// Scaled-subtraction expression factor
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
/// \tparam Scalar A scalar type
/// \param factor The scaling factor
/// \param expr The scaled-subtraction expression object
/// \return A scaled-subtraction expression object
template <typename Left, typename Right, typename Scalar>
inline typename std::enable_if<TiledArray::detail::is_numeric<Scalar>::value,
ScalSubtExpr<Left, Right> >::type
operator*(const Scalar& factor, const ScalSubtExpr<Left, Right>& expr) {
return ScalSubtExpr<Left, Right>(expr, factor);
}
/// Negated addition expression factor
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
/// \param expr The addition expression object
/// \return A scaled-addition expression object
template <typename Left, typename Right>
inline ScalSubtExpr<Left, Right> operator-(const SubtExpr<Left, Right>& expr) {
return ScalSubtExpr<Left, Right>(expr, -1);
}
/// Negated scaled-addition expression factor
/// \tparam Left The left-hand expression type
/// \tparam Right The right-hand expression type
/// \param expr The addition expression object
/// \return A scaled-addition expression object
template <typename Left, typename Right, typename Scalar>
inline ScalSubtExpr<Left, Right> operator-(const ScalSubtExpr<Left, Right>& expr) {
return ScalSubtExpr<Left, Right>(expr, -1);
}
} // namespace expressions
} // namespace TiledArray
#endif // TILEDARRAY_EXPRESSIONS_SUBT_EXPR_H__INCLUDED
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