text: //=================================================================================================
  /*!
  //  \file blaze/math/traits/SVecScalarMultExprTrait.h
  //  \brief Header file for the SVecScalarMultExprTrait class template
  //
  //  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_SVECSCALARMULTEXPRTRAIT_H_
  #define _BLAZE_MATH_TRAITS_SVECSCALARMULTEXPRTRAIT_H_
  
  
  //*************************************************************************************************
  // Includes
  //*************************************************************************************************
  
  #include <blaze/math/expressions/Forward.h>
  #include <blaze/math/traits/MultTrait.h>
  #include <blaze/math/typetraits/IsColumnVector.h>
  #include <blaze/math/typetraits/IsSparseVector.h>
  #include <blaze/math/typetraits/UnderlyingBuiltin.h>
  #include <blaze/math/typetraits/UnderlyingNumeric.h>
  #include <blaze/util/InvalidType.h>
  #include <blaze/util/mpl/And.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/IsNumeric.h>
  #include <blaze/util/typetraits/IsReference.h>
  #include <blaze/util/typetraits/IsVolatile.h>
  
  
  namespace blaze {
  
  //=================================================================================================
  //
  //  CLASS DEFINITION
  //
  //=================================================================================================
  
  //*************************************************************************************************
  /*! \cond BLAZE_INTERNAL */
  /*!\brief Auxiliary helper struct for the SVecScalarMultExprTrait trait.
  // \ingroup math_traits
  */
  template< typename VT
          , typename ST
          , bool Condition >
  struct SVecScalarMultExprTraitHelper
  {
   private:
     //**********************************************************************************************
     using ScalarType = If_< And< IsComplex< UnderlyingNumeric_<VT> >, IsBuiltin<ST> >
                           , MultTrait_< UnderlyingBuiltin_<VT>, ST >
                           , MultTrait_< UnderlyingNumeric_<VT>, ST > >;
     //**********************************************************************************************
  
   public:
     //**********************************************************************************************
     using Type = SVecScalarMultExpr<VT,ScalarType,false>;
     //**********************************************************************************************
  };
  /*! \endcond */
  //*************************************************************************************************
  
  
  //*************************************************************************************************
  /*! \cond BLAZE_INTERNAL */
  /*!\brief Specialization of the SVecScalarMultExprTraitHelper class template.
  // \ingroup math_traits
  */
  template< typename VT
          , typename ST >
  struct SVecScalarMultExprTraitHelper<VT,ST,false>
  {
   public:
     //**********************************************************************************************
     using Type = INVALID_TYPE;
     //**********************************************************************************************
  };
  /*! \endcond */
  //*************************************************************************************************
  
  
  //*************************************************************************************************
  /*!\brief Evaluation of the expression type of a sparse vector/scalar multiplication.
  // \ingroup math_traits
  //
  // Via this type trait it is possible to evaluate the resulting expression type of a sparse
  // vector/scalar multiplication. Given the non-transpose sparse vector type \a VT and the
  // scalar type \a ST, the nested type \a Type corresponds to the resulting expression type.
  // In case either \a VT is not a non-transpose sparse vector type or \a ST is not a scalar
  // type, the resulting \a Type is set to \a INVALID_TYPE.
  */
  template< typename VT    // Type of the left-hand side sparse vector
          , typename ST >  // Type of the right-hand side scalar
  struct SVecScalarMultExprTrait
  {
   private:
     //**********************************************************************************************
     /*! \cond BLAZE_INTERNAL */
     enum : bool { condition = And< IsSparseVector<VT>, IsColumnVector<VT>, IsNumeric<ST> >::value };
     /*! \endcond */
     //**********************************************************************************************
  
   public:
     //**********************************************************************************************
     /*! \cond BLAZE_INTERNAL */
     using Type = typename If_< Or< IsConst<VT>, IsVolatile<VT>, IsReference<VT>
                                  , IsConst<ST>, IsVolatile<ST>, IsReference<ST> >
                              , SVecScalarMultExprTrait< Decay_<VT>, Decay_<ST> >
                              , SVecScalarMultExprTraitHelper<VT,ST,condition> >::Type;
     /*! \endcond */
     //**********************************************************************************************
  };
  //*************************************************************************************************
  
  
  //*************************************************************************************************
  /*!\brief Auxiliary alias declaration for the SVecScalarMultExprTrait class template.
  // \ingroup math_traits
  //
  // The SVecScalarMultExprTrait_ alias declaration provides a convenient shortcut to access
  // the nested \a Type of the SVecScalarMultExprTrait class template. For instance, given the
  // non-transpose sparse vector type \a VT and the scalar type \a ST the following two type
  // definitions are identical:
  
     \code
     using Type1 = typename SVecScalarMultExprTrait<VT,ST>::Type;
     using Type2 = SVecScalarMultExprTrait_<VT,ST>;
     \endcode
  */
  template< typename VT    // Type of the left-hand side sparse vector
          , typename ST >  // Type of the right-hand side scalar
  using SVecScalarMultExprTrait_ = typename SVecScalarMultExprTrait<VT,ST>::Type;
  //*************************************************************************************************
  
  } // namespace blaze
  
  #endif
  