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moar traits

master
Daniel Kolesa 2015-04-13 23:04:25 +01:00
parent 292c5a35b7
commit 0500e52295
1 changed files with 27 additions and 11 deletions
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38
octa/traits.h
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@ -6,6 +6,8 @@
#ifndef OCTA_TRAITS_H
#define OCTA_TRAITS_H
#include <stddef.h>
#include "octa/types.h"
namespace octa {
@ -86,9 +88,8 @@ namespace octa {
/* is pointer */
template<typename T> struct IsPointerBase: false_t {};
template<> struct IsPointerBase<T *>: true_t {};
template<typename > struct IsPointerBase : false_t {};
template<typename T> struct IsPointerBase<T *>: true_t {};
template<typename T>
struct IsPointer: IsPointerBase<typename RemoveConstVolatile<T>::type> {};
@ -101,15 +102,30 @@ namespace octa {
/* type equality */
template<typename, typename>
struct IsEqual {
static const bool value = false;
};
template<typename, typename> struct IsEqual : false_t {};
template<typename T > struct IsEqual<T, T>: true_t {};
template<typename T>
struct IsEqual<T, T> {
static const bool value = true;
};
/* is lvalue reference */
template<typename > struct IsLvalueReference : false_t {};
template<typename T> struct IsLvalueReference<T &>: true_t {};
/* is rvalue reference */
template<typename > struct IsRvalueReference : false_t {};
template<typename T> struct IsRvalueReference<T &&>: true_t {};
/* is reference */
template<typename T> struct IsReference: IntegralConstant<bool,
(IsLvalueReference<T>::value || IsRvalueReference<T>::value)
> {};
/* is array */
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 {};
}
#endif