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remove PointerTraits; replace with individual using aliases

master
Daniel Kolesa 2015-05-03 22:39:32 +01:00
parent 2d10cd9280
commit ef9995ae51
1 changed files with 69 additions and 31 deletions
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100
octa/memory.h
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@ -76,65 +76,103 @@ namespace octa {
}; };
template<typename T, typename U, bool = __OctaHasRebind<T, U>::value> template<typename T, typename U, bool = __OctaHasRebind<T, U>::value>
struct __OctaPtrTraitsRebind { struct __OctaPtrTraitsRebindType {
typedef typename T::template rebind<U> type; typedef typename T::template rebind<U> type;
}; };
template<template<typename, typename...> class T, typename U, template<template<typename, typename...> class T, typename U,
typename ...A, typename V typename ...A, typename V
> >
struct __OctaPtrTraitsRebind<T<U, A...>, V, true> { struct __OctaPtrTraitsRebindType<T<U, A...>, V, true> {
typedef typename T<U, A...>::template rebind<V> type; typedef typename T<U, A...>::template rebind<V> type;
}; };
template<template<typename, typename...> class T, typename U, template<template<typename, typename...> class T, typename U,
typename ...A, typename V typename ...A, typename V
> >
struct __OctaPtrTraitsRebind<T<U, A...>, V, false> { struct __OctaPtrTraitsRebindType<T<U, A...>, V, false> {
typedef T<V, A...> type; typedef T<V, A...> type;
}; };
template<typename T> template<typename T>
struct PointerTraits { struct __OctaPtrTraitsPointer {
typedef T pointer; typedef T type;
};
typedef typename __OctaPtrTraitsElementType <T>::type element_type; template<typename T>
typedef typename __OctaPtrTraitsDifferenceType<T>::type difference_type; struct __OctaPtrTraitsPointer<T *> {
typedef T *type;
};
template<typename U> template<typename T>
using rebind = typename __OctaPtrTraitsRebind<T, U>::type; using PointerType = typename __OctaPtrTraitsPointer<T>::type;
private: template<typename T>
struct __OctaNat {}; struct __OctaPtrTraitsElement {
typedef typename __OctaPtrTraitsElementType<T>::type type;
};
public: template<typename T>
static T pointer_to(Conditional<IsVoid<element_type>::value, struct __OctaPtrTraitsElement<T *> {
__OctaNat, element_type typedef T type;
};
template<typename T>
using PointerElement = typename __OctaPtrTraitsElement<T>::type;
template<typename T>
struct __OctaPtrTraitsDifference {
typedef typename __OctaPtrTraitsDifferenceType<T>::type type;
};
template<typename T>
struct __OctaPtrTraitsDifference<T *> {
typedef ptrdiff_t difference_type;
};
template<typename T>
using PointerDifference = typename __OctaPtrTraitsDifference<T>::type;
template<typename T, typename U>
struct __OctaPtrTraitsRebind {
using type = typename __OctaPtrTraitsRebindType<T, U>::type;
};
template<typename T, typename U>
struct __OctaPtrTraitsRebind<T *, U> {
using type = U *;
};
template<typename T, typename U>
using PointerRebind = typename __OctaPtrTraitsRebind<T, U>::type;
struct __OctaPtrTraitsNat {};
template<typename T>
struct __OctaPtrTraitsPointerTo {
static T pointer_to(Conditional<IsVoid<PointerElement<T>>::value,
__OctaPtrTraitsNat, PointerElement<T>
> &r) noexcept(noexcept(T::pointer_to(r))) { > &r) noexcept(noexcept(T::pointer_to(r))) {
return T::pointer_to(r); return T::pointer_to(r);
} }
}; };
template<typename T> template<typename T>
struct PointerTraits<T *> { struct __OctaPtrTraitsPointerTo<T *> {
typedef T *pointer; static T pointer_to(Conditional<IsVoid<T>::value, __OctaPtrTraitsNat, T> &r)
typedef T element_type; noexcept {
typedef ptrdiff_t difference_type;
template<typename U> using rebind = U *;
private:
struct __OctaNat {};
public:
static T pointer_to(Conditional<IsVoid<element_type>::value,
__OctaNat, element_type
> &r) noexcept {
return octa::address_of(r); return octa::address_of(r);
} }
}; };
template<typename T>
static T pointer_to(Conditional<IsVoid<PointerElement<T>>::value,
__OctaPtrTraitsNat, PointerElement<T>
> &r) noexcept(noexcept(__OctaPtrTraitsPointerTo<T>::pointer_to(r))) {
return __OctaPtrTraitsPointerTo<T>::pointer_to(r);
}
/* default deleter */ /* default deleter */
template<typename T> template<typename T>
@ -326,8 +364,8 @@ namespace octa {
}; };
template<typename T, typename U, bool = IsSame< template<typename T, typename U, bool = IsSame<
RemoveCv<typename PointerTraits<T>::element_type>, RemoveCv<PointerElement<T>>,
RemoveCv<typename PointerTraits<U>::element_type> RemoveCv<PointerElement<U>>
>::value> struct __OctaSameOrLessCvQualifiedBase: IsConvertible<T, U> {}; >::value> struct __OctaSameOrLessCvQualifiedBase: IsConvertible<T, U> {};
template<typename T, typename U> template<typename T, typename U>