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//=================================================================================================
/*!
// \file blaze/math/traits/RealTrait.h
// \brief Header file for the real trait
//
// Copyright (C) 2013 Klaus Iglberger - All Rights Reserved
//
// This file is part of the Blaze library. You can redistribute it and/or modify it under
// the terms of the New (Revised) BSD License. Redistribution and use in source and binary
// forms, with or without modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other materials
// provided with the distribution.
// 3. Neither the names of the Blaze development group nor the names of its contributors
// may be used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
// SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.
*/
//=================================================================================================
#ifndef _BLAZE_MATH_TRAITS_REALTRAIT_H_
#define _BLAZE_MATH_TRAITS_REALTRAIT_H_
//*************************************************************************************************
// Includes
//*************************************************************************************************
#include <blaze/math/Aliases.h>
#include <blaze/math/typetraits/IsMatrix.h>
#include <blaze/math/typetraits/IsVector.h>
#include <blaze/util/Complex.h>
#include <blaze/util/InvalidType.h>
#include <blaze/util/mpl/If.h>
#include <blaze/util/mpl/Or.h>
#include <blaze/util/typetraits/Decay.h>
#include <blaze/util/typetraits/IsBuiltin.h>
#include <blaze/util/typetraits/IsComplex.h>
#include <blaze/util/typetraits/IsConst.h>
#include <blaze/util/typetraits/IsReference.h>
#include <blaze/util/typetraits/IsVolatile.h>
namespace blaze {
//=================================================================================================
//
// CLASS DEFINITION
//
//=================================================================================================
//*************************************************************************************************
/*!\brief Base template for the RealTrait class.
// \ingroup math_traits
//
// The RealTrait class template offers the possibility to select the resulting data type of a
// generic \a real operation on the given type \a T. Given the type \a T, which must either be
// a scalar, vector, or matrix type, the nested type \a Type corresponds to the resulting data
// type of the operation. In case the type of \a T doesn't fit or if no \a real operation exists
// for the type, the resulting data type \a Type is set to \a INVALID_TYPE. Note that \a const
// and \a volatile qualifiers and reference modifiers are generally ignored.
*/
template< typename T > // Type of the operand
struct RealTrait
{
private:
//**********************************************************************************************
/*! \cond BLAZE_INTERNAL */
struct MatrixOrVector {
using RT = typename RealTrait< ElementType_<T> >::Type;
using Type = typename T::template Rebind<RT>::Other;
};
/*! \endcond */
//**********************************************************************************************
//**********************************************************************************************
/*! \cond BLAZE_INTERNAL */
struct Builtin {
using Type = T;
};
/*! \endcond */
//**********************************************************************************************
//**********************************************************************************************
/*! \cond BLAZE_INTERNAL */
struct Complex {
using Type = typename T::value_type;
};
/*! \endcond */
//**********************************************************************************************
//**********************************************************************************************
/*! \cond BLAZE_INTERNAL */
struct Failure {
using Type = INVALID_TYPE;
};
/*! \endcond */
//**********************************************************************************************
//**********************************************************************************************
/*! \cond BLAZE_INTERNAL */
using Tmp = If_< Or< IsMatrix<T>, IsVector<T> >
, MatrixOrVector
, If_< IsBuiltin<T>
, Builtin
, If_< IsComplex<T>
, Complex
, Failure > > >;
/*! \endcond */
//**********************************************************************************************
public:
//**********************************************************************************************
/*! \cond BLAZE_INTERNAL */
using Type = typename If_< Or< IsConst<T>, IsVolatile<T>, IsReference<T> >
, RealTrait< Decay_<T> >
, Tmp >::Type;
/*! \endcond */
//**********************************************************************************************
};
//*************************************************************************************************
//*************************************************************************************************
/*!\brief Auxiliary alias declaration for the RealTrait class template.
// \ingroup math_traits
//
// The RealTrait_ alias declaration provides a convenient shortcut to access the nested \a Type
// of the RealTrait class template. For instance, given the type \a T the following two type
// definitions are identical:
\code
using Type1 = typename RealTrait<T>::Type;
using Type2 = RealTrait_<T>;
\endcode
*/
template< typename T > // Type of the operand
using RealTrait_ = typename RealTrait<T>::Type;
//*************************************************************************************************
} // namespace blaze
#endif
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