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more traits

master
Daniel Kolesa 2015-04-23 01:26:03 +01:00
parent 7779563bd9
commit 456704caa2
1 changed files with 83 additions and 12 deletions
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95
octa/traits.h
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@ -130,15 +130,31 @@ namespace octa {
template<typename T> struct IsClass: IntegralConstant<bool, __is_class(T)> {};
/* is number */
/* is function TODO */
template<typename T> struct IsNumber: IntegralConstant<bool,
template<typename> struct IsFunction: false_t {};
/* is arithmetic */
template<typename T> struct IsArithmetic: IntegralConstant<bool,
(IsIntegral<T>::value || IsFloatingPoint<T>::value)
> {};
/* is fundamental */
template<typename T> struct IsFundamental: IntegralConstant<bool,
(IsArithmetic<T>::value || IsVoid<T>::value || IsNullPointer<T>::value)
> {};
/* is compound */
template<typename T> struct IsCompound: IntegralConstant<bool,
!IsFundamental<T>::value
> {};
/* is pointer to member */
template<typename > struct IsMemberPointerBase: false_t {};
template<typename> struct IsMemberPointerBase: false_t {};
template<typename T, typename U>
struct IsMemberPointerBase<T U::*>: true_t {};
@ -147,10 +163,71 @@ namespace octa {
typename RemoveConstVolatile<T>::type
> {};
/* is POD: currently wrong */
/* is reference */
template<typename T> struct IsPOD: IntegralConstant<bool,
(IsIntegral<T>::value || IsFloatingPoint<T>::value || IsPointer<T>::value)
template<typename T> struct IsReference: IntegralConstant<bool,
(IsLvalueReference<T>::value || IsRvalueReference<T>::value)
> {};
/* is object */
template<typename T> struct IsObject: IntegralConstant<bool,
(!IsFunction<T>::value && !IsVoid<T>::value && !IsReference<T>::value)
> {};
/* is scalar */
template<typename T> struct IsScalar: IntegralConstant<bool,
(IsMemberPointer<T>::value || IsPointer<T>::value || IsEnum<T>::value
|| IsNullPointer <T>::value || IsArithmetic<T>::value)
> {};
/* is abstract */
template<typename T>
struct IsAbstract: IntegralConstant<bool, __is_abstract(T)> {};
/* is const */
template<typename > struct IsConst : false_t {};
template<typename T> struct IsConst<const T>: true_t {};
/* is volatile */
template<typename > struct IsVolatile : false_t {};
template<typename T> struct IsVolatile<volatile T>: true_t {};
/* is empty */
template<typename T> struct IsEmpty: IntegralConstant<bool, __is_empty(T)> {};
/* is literal type */
template<typename T>
struct IsLiteralType: IntegralConstant<bool, __is_literal_type(T)> {};
/* is POD */
template<typename T> struct IsPOD: IntegralConstant<bool, __is_pod(T)> {};
/* is polymorphic */
template<typename T>
struct IsPolymorphic: IntegralConstant<bool, __is_polymorphic(T)> {};
/* is signed */
template<typename T> struct IsSigned: IntegralConstant<bool, T(-1) < T(0)> {};
/* is unsigned */
template<typename T> struct IsUnsigned: IntegralConstant<bool, T(0) < T(-1)> {};
/* is standard layout */
template<typename T> struct RemoveAllExtents;
template<typename T> struct IsStandardLayout: IntegralConstant<bool,
IsScalar<typename RemoveAllExtents<T>::type>::value
> {};
/* type equality */
@ -158,12 +235,6 @@ namespace octa {
template<typename, typename> struct IsEqual : false_t {};
template<typename T > struct IsEqual<T, T>: true_t {};
/* is reference */
template<typename T> struct IsReference: IntegralConstant<bool,
(IsLvalueReference<T>::value || IsRvalueReference<T>::value)
> {};
/* add lvalue reference */
template<typename T> struct AddLvalueReference { typedef T &type; };