author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Fri, 28 Sep 2007 10:32:15 +0200 | |
changeset 1679 | 4160d5d5041d |
parent 1678 | 00452ae23a6f |
child 1683 | e4adb8cd4fc6 |
permissions | -rw-r--r-- |
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#ifndef TYPE_TRAITS_H |
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#define TYPE_TRAITS_H |
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template <typename T> |
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struct TypeTraits |
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{ |
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private: |
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struct NullType {}; |
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template <typename U> struct UnConst |
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{ |
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typedef U Result; |
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}; |
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template <typename U> struct UnConst<const U> |
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{ |
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typedef U Result; |
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}; |
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template <typename U> struct ReferenceTraits |
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{ |
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enum {IsReference = 0}; |
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typedef U ReferencedType; |
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}; |
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template <typename U> struct ReferenceTraits<U&> |
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{ |
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enum {IsReference = 1}; |
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typedef U ReferencedType; |
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}; |
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template <typename U> struct PointerTraits |
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{ |
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enum {IsPointer = 0}; |
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typedef U PointeeType; |
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}; |
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template <typename U> struct PointerTraits<U *> |
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{ |
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enum {IsPointer = 1}; |
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typedef U PointeeType; |
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}; |
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template <typename U> struct FunctionPtrTraits |
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{ |
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enum {IsFunctionPointer = 0}; |
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}; |
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template <typename U> |
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struct FunctionPtrTraits <U (*) (void)> |
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{ |
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enum {IsFunctionPointer = 1}; |
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enum {nArgs = 0}; |
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typedef U ReturnType; |
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}; |
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template <typename U, typename V1> |
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struct FunctionPtrTraits <U (*) (V1)> |
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{ |
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enum {IsFunctionPointer = 1}; |
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enum {nArgs = 1}; |
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typedef U ReturnType; |
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typedef V1 Arg1Type; |
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}; |
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template <typename U, typename V1, typename V2> |
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struct FunctionPtrTraits <U (*) (V1,V2)> |
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{ |
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enum {IsFunctionPointer = 1}; |
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enum {nArgs = 2}; |
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typedef U ReturnType; |
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typedef V1 Arg1Type; |
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typedef V2 Arg2Type; |
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}; |
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template <typename U> struct PtrToMemberTraits |
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{ |
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enum {IsPointerToMember = 0}; |
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}; |
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template <typename U, typename V> |
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struct PtrToMemberTraits <U (V::*) (void)> |
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{ |
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enum {IsPointerToMember = 1}; |
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enum {nArgs = 0}; |
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typedef U ReturnType; |
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}; |
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template <typename U, typename V> |
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struct PtrToMemberTraits <U (V::*) (void) const> |
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{ |
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enum {IsPointerToMember = 1}; |
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enum {nArgs = 0}; |
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typedef U ReturnType; |
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}; |
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template <typename U, typename V,typename W1> |
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struct PtrToMemberTraits <U (V::*) (W1)> |
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{ |
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enum {IsPointerToMember = 1}; |
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enum {nArgs = 1}; |
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typedef U ReturnType; |
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typedef W1 Arg1Type; |
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}; |
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template <typename U, typename V,typename W1> |
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struct PtrToMemberTraits <U (V::*) (W1) const> |
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{ |
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enum {IsPointerToMember = 1}; |
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enum {nArgs = 1}; |
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typedef U ReturnType; |
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typedef W1 Arg1Type; |
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}; |
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template <typename U, typename V,typename W1, typename W2> |
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struct PtrToMemberTraits <U (V::*) (W1,W2)> |
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{ |
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enum {IsPointerToMember = 1}; |
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enum {nArgs = 2}; |
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typedef U ReturnType; |
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typedef W1 Arg1Type; |
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typedef W2 Arg2Type; |
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}; |
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template <typename U, typename V,typename W1, typename W2> |
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struct PtrToMemberTraits <U (V::*) (W1,W2) const> |
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{ |
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enum {IsPointerToMember = 1}; |
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enum {nArgs = 2}; |
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typedef U ReturnType; |
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typedef W1 Arg1Type; |
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typedef W2 Arg2Type; |
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}; |
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public: |
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typedef typename UnConst<T>::Result NonConstType; |
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typedef typename ReferenceTraits<T>::ReferencedType ReferencedType; |
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typedef typename PointerTraits<T>::PointeeType PointeeType; |
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enum {IsPointerToMember = PtrToMemberTraits<T>::IsPointerToMember}; |
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enum {IsPointer = PointerTraits<T>::IsPointer}; |
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enum {IsReference = ReferenceTraits<T>::IsReference}; |
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enum {IsFunctionPointer = FunctionPtrTraits<T>::IsFunctionPointer}; |
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typedef PtrToMemberTraits<T> PointerToMemberTraits; |
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typedef FunctionPtrTraits<T> FunctionPointerTraits; |
947 | 128 |
}; |
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#endif /* TYPE_TRAITS_H */ |