HasReal.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_TYPETRAITS_HASREAL_H_
36 #define _BLAZE_MATH_TYPETRAITS_HASREAL_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <utility>
46 #include <blaze/util/EnableIf.h>
47 #include <blaze/util/FalseType.h>
48 #include <blaze/util/TrueType.h>
50 
51 
52 namespace blaze {
53 
54 //=================================================================================================
55 //
56 // CLASS DEFINITION
57 //
58 //=================================================================================================
59 
60 //*************************************************************************************************
65 template< typename T, typename = void >
66 struct HasRealHelper
67  : public FalseType
68 {};
70 //*************************************************************************************************
71 
72 
73 //*************************************************************************************************
78 template< typename T >
79 struct HasRealHelper< T, Void_t< decltype( real( std::declval<T>() ) ) > >
80  : public TrueType
81 {};
83 //*************************************************************************************************
84 
85 
86 //*************************************************************************************************
107 template< typename T, typename = void >
108 struct HasReal
109  : public HasRealHelper<T>
110 {};
111 //*************************************************************************************************
112 
113 
114 //*************************************************************************************************
119 template< typename T >
120 struct HasReal< T, EnableIf_t< IsVector_v<T> > >
121  : public HasReal< typename T::ElementType >
122 {};
124 //*************************************************************************************************
125 
126 
127 //*************************************************************************************************
132 template< typename T >
133 struct HasReal< T, EnableIf_t< IsMatrix_v<T> > >
134  : public HasReal< typename T::ElementType >
135 {};
137 //*************************************************************************************************
138 
139 
140 //*************************************************************************************************
153 template< typename T >
154 constexpr bool HasReal_v = HasReal<T>::value;
155 //*************************************************************************************************
156 
157 } // namespace blaze
158 
159 #endif
BoolConstant< false > FalseType
Type/value traits base class.The FalseType class is used as base class for type traits and value trai...
Definition: FalseType.h:61
Header file for the Void type trait.
constexpr bool HasReal_v
Auxiliary variable template for the HasReal type trait.The HasReal_v variable template provides a con...
Definition: HasReal.h:154
constexpr bool IsMatrix_v
Auxiliary variable template for the IsMatrix type trait.The IsMatrix_v variable template provides a c...
Definition: IsMatrix.h:139
Header file for the FalseType type/value trait base class.
decltype(auto) real(const DenseMatrix< MT, SO > &dm)
Returns a matrix containing the real part of each single element of dm.
Definition: DMatMapExpr.h:1392
void Void_t
Compile time type check.This type trait maps an arbitrary sequence of types to the type void...
Definition: Void.h:64
BoolConstant< true > TrueType
Type traits base class.The TrueType class is used as base class for type traits and value traits that...
Definition: TrueType.h:61
STL namespace.
Header file for the IsMatrix type trait.
typename EnableIf< Condition, T >::Type EnableIf_t
Auxiliary type for the EnableIf class template.The EnableIf_t alias declaration provides a convenient...
Definition: EnableIf.h:138
Namespace of the Blaze C++ math library.
Definition: Blaze.h:58
Availability of the real() operation for the given data types.This type trait provides the informatio...
Definition: HasReal.h:108
constexpr bool IsVector_v
Auxiliary variable template for the IsVector type trait.The IsVector_v variable template provides a c...
Definition: IsVector.h:140
Header file for the IsVector type trait.
Header file for the EnableIf class template.
Header file for the TrueType type/value trait base class.