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// -*- c++ -*-
/*
* Copyright (c) 2010-2012, Jim Bosch
* All rights reserved.
*
* ndarray is distributed under a simple BSD-like license;
* see the LICENSE file that should be present in the root
* of the source distribution, or alternately available at:
* https://github.com/ndarray/ndarray
*/
#ifndef NDARRAY_ArrayRef_h_INCLUDED
#define NDARRAY_ArrayRef_h_INCLUDED
/**
* @file ndarray/ArrayRef.h
*
* @brief Definitions for ArrayRef.
*/
#include "ndarray_fwd.h"
#include "ndarray/ArrayTraits.h"
#include "ndarray/ArrayBaseN.h"
#include "ndarray/detail/ArrayAccess.h"
#include "ndarray/Vector.h"
#include "ndarray/detail/Core.h"
#include "ndarray/views.h"
namespace ndarray {
/**
* @brief A proxy class for Array with deep assignment operators.
*/
template <typename T, int N, int C>
class ArrayRef : public ArrayBaseN< ArrayRef<T,N,C> > {
typedef ArrayBaseN<ArrayRef> Super;
typedef typename Super::Core Core;
typedef typename Super::CorePtr CorePtr;
public:
typedef typename Super::Iterator Iterator;
/**
* @brief Construct an array with the given dimensions and allocated but uninitialized memory.
*
* Unspecified dimensions will have unit size, and if the number of argmuments is greater
* than the number of dimensions of the array, the extra arguments will be silently ignored.
*
* This is implemented in initialization.h.
*/
explicit ArrayRef(Size n1, Size n2=1, Size n3=1, Size n4=1, Size n5=1, Size n6=1, Size n7=1, Size n8=1);
/**
* @brief Construct an array with the given dimensions and allocated but uninitialized memory.
*
* This is implemented in initialization.h.
*/
template <typename U>
explicit ArrayRef(Vector<U,N> const & shape);
/**
* @brief Non-converting copy constructor.
*/
ArrayRef(ArrayRef const & other) : Super(other._data, other._core) {}
/**
* @brief Converting copy constructor.
*
* Implicit conversion is allowed for non-const to const and for
* more guaranteed RMC to less guaranteed RMC (see \ref ndarrayTutorial).
*/
template <typename T_, int C_>
explicit ArrayRef(
Array<T_,N,C_> const & other
#ifndef DOXYGEN
, typename boost::enable_if<detail::Convertible<N,T_,C_,T,C>,void*>::type=0
#endif
) : Super(other._data, other._core) {}
/**
* @brief Converting copy constructor.
*
* Implicit conversion is allowed for non-const to const and for
* more guaranteed RMC to less guaranteed RMC (see \ref ndarrayTutorial).
*/
template <typename T_, int C_>
ArrayRef(
ArrayRef<T_,N,C_> const & other
#ifndef DOXYGEN
, typename boost::enable_if<detail::Convertible<N,T_,C_,T,C>,void*>::type=0
#endif
) : Super(other._data, other._core) {}
/**
* @name Assignment and Augmented Assignment Operators
*
* ArrayRef assignment is deep, and requires that
* the ArrayRef being assigned to has the same shape as
* the input array expression. Scalar assignment sets
* all elements of the ArrayRef to a single value.
*/
/// @{
ArrayRef const & operator=(Array<T,N,C> const & other) const {
NDARRAY_ASSERT(other.getShape() == this->getShape());
std::copy(other.begin(), other.end(), this->begin());
return *this;
}
ArrayRef const & operator=(ArrayRef const & other) const {
NDARRAY_ASSERT(other.getShape() == this->getShape());
std::copy(other.begin(), other.end(), this->begin());
return *this;
}
/// \brief = assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator =(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
std::copy(expr.begin(),expr.end(),this->begin());
return *this;
}
/// \brief = assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator =(Scalar const & scalar) const {
Super::Traits::fill(this->begin(),this->end(),scalar);
return *this;
}
/// \brief += assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator +=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) += (*j);
return *this;
}
/// \brief += assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator +=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) += scalar;
return *this;
}
/// \brief -= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator -=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) -= (*j);
return *this;
}
/// \brief -= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator -=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) -= scalar;
return *this;
}
/// \brief *= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator *=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) *= (*j);
return *this;
}
/// \brief *= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator *=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) *= scalar;
return *this;
}
/// \brief /= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator /=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) /= (*j);
return *this;
}
/// \brief /= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator /=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) /= scalar;
return *this;
}
/// \brief %= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator %=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) %= (*j);
return *this;
}
/// \brief %= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator %=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) %= scalar;
return *this;
}
/// \brief ^= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator ^=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) ^= (*j);
return *this;
}
/// \brief ^= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator ^=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) ^= scalar;
return *this;
}
/// \brief &= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator &=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) &= (*j);
return *this;
}
/// \brief &= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator &=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) &= scalar;
return *this;
}
/// \brief |= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator |=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) |= (*j);
return *this;
}
/// \brief |= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator |=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) |= scalar;
return *this;
}
/// \brief <<= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator <<=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) <<= (*j);
return *this;
}
/// \brief <<= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator <<=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) <<= scalar;
return *this;
}
/// \brief >>= assignment of arrays and array expressions.
template <typename Other>
ArrayRef const &
operator >>=(ExpressionBase<Other> const & expr) const {
NDARRAY_ASSERT(expr.getShape()
== this->getShape().template first<ExpressionBase<Other>::ND::value>());
Iterator const i_end = this->end();
typename Other::Iterator j = expr.begin();
for (Iterator i = this->begin(); i != i_end; ++i, ++j) (*i) >>= (*j);
return *this;
}
/// \brief >>= assignment of scalars.
template <typename Scalar>
#ifndef DOXYGEN
typename boost::enable_if<boost::is_convertible<Scalar,T>, ArrayRef const &>::type
#else
ArrayRef const &
#endif
operator >>=(Scalar const & scalar) const {
Iterator const i_end = this->end();
for (Iterator i = this->begin(); i != i_end; ++i) (*i) >>= scalar;
return *this;
}
///@}
private:
template <typename T_, int N_, int C_> friend class Array;
template <typename T_, int N_, int C_> friend class ArrayRef;
template <typename T_, int N_, int C_> friend struct ArrayTraits;
template <typename Derived> friend class ArrayBase;
template <typename Array_> friend class detail::ArrayAccess;
/// @internal @brief Construct an ArrayRef from a pointer and Core.
ArrayRef(T * data, CorePtr const & core) : Super(data, core) {}
};
} // namespace ndarray
#endif // !NDARRAY_ArrayRef_h_INCLUDED