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add move/forward and more traits

master
Daniel Kolesa 2015-04-14 01:12:00 +01:00
parent 0311af0ffe
commit df1b9daeaf
2 changed files with 47 additions and 2 deletions
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47
octa/traits.h
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@ -44,7 +44,7 @@ namespace octa {
template<typename T, T val>
struct IntegralConstant {
static const T value = val;
static constexpr const T value = val;
typedef T value_type;
typedef IntegralConstant<T, val> type;
@ -53,7 +53,7 @@ namespace octa {
typedef IntegralConstant<bool, true> true_t;
typedef IntegralConstant<bool, false> false_t;
template<typename T, T val> const T IntegralConstant<T, val>::value;
template<typename T, T val> constexpr const T IntegralConstant<T, val>::value;
/* is integer */
@ -100,6 +100,27 @@ namespace octa {
template<typename T>
struct IsPointer: IsPointerBase<typename RemoveConstVolatile<T>::type> {};
/* is pointer to member function */
template<typename > struct IsMemberPointerBase: false_t {};
template<typename T, typename U>
struct IsMemberPointerBase<T U::*>: true_t {};
template<typename T>
struct IsMemberPointer: IsMemberPointerBase<
typename RemoveConstVolatile<T>::type
> {};
/* is null pointer */
template<typename> struct IsNullPointerBase : false_t {};
template< > struct IsNullPointerBase<nullptr_t>: true_t {};
template<typename T>
struct IsNullPointer: IsNullPointerBase<
typename RemoveConstVolatile<T>::type
> {};
/* is POD: currently wrong */
template<typename T> struct IsPOD: IntegralConstant<bool,
@ -144,6 +165,28 @@ namespace octa {
template<typename > struct IsArray : false_t {};
template<typename T > struct IsArray<T[] >: true_t {};
template<typename T, size_t N> struct IsArray<T[N]>: true_t {};
/* move */
template<typename T>
static inline constexpr typename RemoveReference<T>::type &&
move(T &&v) noexcept {
return (typename RemoveReference<T>::type &&)v;
}
/* forward */
template<typename T>
static inline constexpr T &&
forward(typename RemoveReference<T>::type &v) noexcept {
return (T &&)v;
}
template<typename T>
static inline constexpr T &&
forward(typename RemoveReference<T>::type &&v) noexcept {
return (T &&)v;
}
}
#endif

2
octa/types.h
View File

@ -18,6 +18,8 @@ namespace octa {
typedef long long llong;
typedef long double ldouble;
typedef decltype(nullptr) nullptr_t;
}
#endif