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IsAbsExpr.h
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1 //=================================================================================================
33 //=================================================================================================
34 
35 #ifndef _BLAZE_MATH_TYPETRAITS_ISABSEXPR_H_
36 #define _BLAZE_MATH_TYPETRAITS_ISABSEXPR_H_
37 
38 
39 //*************************************************************************************************
40 // Includes
41 //*************************************************************************************************
42 
43 #include <boost/type_traits/is_base_of.hpp>
45 #include <blaze/util/FalseType.h>
46 #include <blaze/util/SelectType.h>
47 #include <blaze/util/TrueType.h>
48 
49 
50 namespace blaze {
51 
52 //=================================================================================================
53 //
54 // CLASS DEFINITION
55 //
56 //=================================================================================================
57 
58 //*************************************************************************************************
63 template< typename T >
64 struct IsAbsExprHelper
65 {
66  //**********************************************************************************************
67  enum { value = boost::is_base_of<AbsExpr,T>::value && !boost::is_base_of<T,AbsExpr>::value };
68  typedef typename SelectType<value,TrueType,FalseType>::Type Type;
69  //**********************************************************************************************
70 };
72 //*************************************************************************************************
73 
74 
75 //*************************************************************************************************
87 template< typename T >
88 struct IsAbsExpr : public IsAbsExprHelper<T>::Type
89 {
90  public:
91  //**********************************************************************************************
93  enum { value = IsAbsExprHelper<T>::value };
94  typedef typename IsAbsExprHelper<T>::Type Type;
96  //**********************************************************************************************
97 };
98 //*************************************************************************************************
99 
100 } // namespace blaze
101 
102 #endif
Header file for the AbsExpr base class.
Header file for the FalseType type/value trait base class.
Compile time check whether the given type is an absolute value expression template.This type trait class tests whether or not the given type Type is an absolute value expression template. In order to qualify as a valid absolute value expression template, the given type has to derive (publicly or privately) from the AbsExpr base class. In case the given type is a valid absolute value expression template, the value member enumeration is set to 1, the nested type definition Type is TrueType, and the class derives from TrueType. Otherwise value is set to 0, Type is FalseType, and the class derives from FalseType.
Definition: IsAbsExpr.h:88
Header file for the SelectType class template.
Header file for the TrueType type/value trait base class.