1119 lines
34 KiB
C++
1119 lines
34 KiB
C++
/* Type traits for OctaSTD.
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*
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* This file is part of OctaSTD. See COPYING.md for futher information.
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*/
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#ifndef OCTA_TRAITS_H
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#define OCTA_TRAITS_H
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#include <stddef.h>
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#include "octa/types.h"
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#include "octa/utility.h"
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namespace octa {
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/* forward declarations */
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template<typename> struct RemoveCV;
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template<typename> struct AddLvalueReference;
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template<typename> struct AddConst;
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template<typename> struct IsReference;
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template<typename> struct RemoveAllExtents;
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template<typename> struct IsTriviallyDefaultConstructible;
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template<typename...> struct CommonType;
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/* integral constant */
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template<typename T, T val>
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struct IntegralConstant {
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static constexpr T value = val;
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typedef T value_type;
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typedef IntegralConstant<T, val> type;
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constexpr operator value_type() const { return value; }
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constexpr value_type operator()() const { return value; }
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};
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typedef IntegralConstant<bool, true> true_t;
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typedef IntegralConstant<bool, false> false_t;
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template<typename T, T val> constexpr T IntegralConstant<T, val>::value;
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/* is void */
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template<typename T> struct __OctaIsVoid : false_t {};
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template< > struct __OctaIsVoid<void>: true_t {};
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template<typename T>
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struct IsVoid: __OctaIsVoid<typename RemoveCV<T>::type> {};
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/* is null pointer */
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template<typename> struct __OctaIsNullPointer : false_t {};
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template< > struct __OctaIsNullPointer<nullptr_t>: true_t {};
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template<typename T> struct IsNullPointer: __OctaIsNullPointer<
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typename RemoveCV<T>::type
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> {};
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/* is integer */
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template<typename T> struct __OctaIsIntegral: false_t {};
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template<> struct __OctaIsIntegral<bool >: true_t {};
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template<> struct __OctaIsIntegral<char >: true_t {};
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template<> struct __OctaIsIntegral<uchar >: true_t {};
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template<> struct __OctaIsIntegral<schar >: true_t {};
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template<> struct __OctaIsIntegral<short >: true_t {};
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template<> struct __OctaIsIntegral<ushort>: true_t {};
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template<> struct __OctaIsIntegral<int >: true_t {};
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template<> struct __OctaIsIntegral<uint >: true_t {};
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template<> struct __OctaIsIntegral<long >: true_t {};
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template<> struct __OctaIsIntegral<ulong >: true_t {};
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template<> struct __OctaIsIntegral<llong >: true_t {};
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template<> struct __OctaIsIntegral<ullong>: true_t {};
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template<typename T>
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struct IsIntegral: __OctaIsIntegral<typename RemoveCV<T>::type> {};
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/* is floating point */
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template<typename T> struct __OctaIsFloatingPoint: false_t {};
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template<> struct __OctaIsFloatingPoint<float >: true_t {};
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template<> struct __OctaIsFloatingPoint<double >: true_t {};
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template<> struct __OctaIsFloatingPoint<ldouble>: true_t {};
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template<typename T>
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struct IsFloatingPoint: __OctaIsFloatingPoint<typename RemoveCV<T>::type> {};
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/* is array */
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template<typename > struct IsArray : false_t {};
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template<typename T > struct IsArray<T[] >: true_t {};
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template<typename T, size_t N> struct IsArray<T[N]>: true_t {};
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/* is pointer */
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template<typename > struct __OctaIsPointer : false_t {};
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template<typename T> struct __OctaIsPointer<T *>: true_t {};
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template<typename T>
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struct IsPointer: __OctaIsPointer<typename RemoveCV<T>::type> {};
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/* is lvalue reference */
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template<typename > struct IsLvalueReference : false_t {};
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template<typename T> struct IsLvalueReference<T &>: true_t {};
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/* is rvalue reference */
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template<typename > struct IsRvalueReference : false_t {};
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template<typename T> struct IsRvalueReference<T &&>: true_t {};
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/* is enum */
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template<typename T> struct IsEnum: IntegralConstant<bool, __is_enum(T)> {};
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/* is union */
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template<typename T> struct IsUnion: IntegralConstant<bool, __is_union(T)> {};
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/* is class */
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template<typename T> struct IsClass: IntegralConstant<bool, __is_class(T)> {};
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/* is function */
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struct __OctaFunctionTestDummy {};
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template<typename T> char __octa_function_test(T *);
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template<typename T> char __octa_function_test(__OctaFunctionTestDummy);
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template<typename T> int __octa_function_test(...);
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template<typename T> T &__octa_function_source(int);
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template<typename T> __OctaFunctionTestDummy __octa_function_source(...);
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template<typename T, bool = IsClass<T>::value || IsUnion<T>::value
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|| IsVoid<T>::value || IsReference<T>::value
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|| IsNullPointer<T>::value
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> struct __OctaIsFunction: IntegralConstant<bool,
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sizeof(__octa_function_test<T>(__octa_function_source<T>(0))) == 1
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> {};
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template<typename T> struct __OctaIsFunction<T, true>: false_t {};
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template<typename T> struct IsFunction: __OctaIsFunction<T> {};
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/* is arithmetic */
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template<typename T> struct IsArithmetic: IntegralConstant<bool,
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(IsIntegral<T>::value || IsFloatingPoint<T>::value)
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> {};
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/* is fundamental */
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template<typename T> struct IsFundamental: IntegralConstant<bool,
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(IsArithmetic<T>::value || IsVoid<T>::value || IsNullPointer<T>::value)
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> {};
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/* is compound */
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template<typename T> struct IsCompound: IntegralConstant<bool,
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!IsFundamental<T>::value
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> {};
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/* is pointer to member */
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template<typename>
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struct __OctaIsMemberPointer: false_t {};
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template<typename T, typename U>
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struct __OctaIsMemberPointer<T U::*>: true_t {};
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template<typename T>
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struct IsMemberPointer: __OctaIsMemberPointer<
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typename RemoveCV<T>::type
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> {};
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/* is pointer to member object */
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template<typename>
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struct __OctaIsMemberObjectPointer: false_t {};
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template<typename T, typename U>
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struct __OctaIsMemberObjectPointer<T U::*>: IntegralConstant<bool,
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!IsFunction<T>::value
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> {};
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template<typename T> struct IsMemberObjectPointer:
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__OctaIsMemberObjectPointer<typename RemoveCV<T>::type> {};
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/* is pointer to member function */
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template<typename>
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struct __OctaIsMemberFunctionPointer: false_t {};
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template<typename T, typename U>
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struct __OctaIsMemberFunctionPointer<T U::*>: IntegralConstant<bool,
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IsFunction<T>::value
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> {};
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template<typename T> struct IsMemberFunctionPointer:
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__OctaIsMemberFunctionPointer<typename RemoveCV<T>::type> {};
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/* is reference */
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template<typename T> struct IsReference: IntegralConstant<bool,
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(IsLvalueReference<T>::value || IsRvalueReference<T>::value)
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> {};
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/* is object */
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template<typename T> struct IsObject: IntegralConstant<bool,
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(!IsFunction<T>::value && !IsVoid<T>::value && !IsReference<T>::value)
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> {};
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/* is scalar */
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template<typename T> struct IsScalar: IntegralConstant<bool,
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(IsMemberPointer<T>::value || IsPointer<T>::value || IsEnum<T>::value
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|| IsNullPointer <T>::value || IsArithmetic<T>::value)
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> {};
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/* is abstract */
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template<typename T>
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struct IsAbstract: IntegralConstant<bool, __is_abstract(T)> {};
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/* is const */
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template<typename > struct IsConst : false_t {};
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template<typename T> struct IsConst<const T>: true_t {};
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/* is volatile */
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template<typename > struct IsVolatile : false_t {};
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template<typename T> struct IsVolatile<volatile T>: true_t {};
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/* is empty */
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template<typename T>
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struct IsEmpty: IntegralConstant<bool, __is_empty(T)> {};
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/* is POD */
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template<typename T> struct IsPOD: IntegralConstant<bool, __is_pod(T)> {};
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/* is polymorphic */
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template<typename T>
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struct IsPolymorphic: IntegralConstant<bool, __is_polymorphic(T)> {};
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/* is signed */
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template<typename T>
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struct IsSigned: IntegralConstant<bool, T(-1) < T(0)> {};
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/* is unsigned */
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template<typename T>
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struct IsUnsigned: IntegralConstant<bool, T(0) < T(-1)> {};
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/* is standard layout */
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template<typename T>
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struct IsStandardLayout: IntegralConstant<bool,
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IsScalar<typename RemoveAllExtents<T>::type>::value
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> {};
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/* is literal type */
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template<typename T>
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struct IsLiteralType: IntegralConstant<bool,
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IsReference<typename RemoveAllExtents<T>::type>::value
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|| IsStandardLayout<T>::value
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> {};
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/* is trivially copyable */
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template<typename T>
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struct IsTriviallyCopyable: IntegralConstant<bool,
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IsScalar<typename RemoveAllExtents<T>::type>::value
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> {};
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/* is trivial */
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template<typename T>
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struct IsTrivial: IntegralConstant<bool,
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(IsTriviallyCopyable<T>::value && IsTriviallyDefaultConstructible<T>::value)
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> {};
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/* has virtual destructor */
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template<typename T>
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struct HasVirtualDestructor: IntegralConstant<bool,
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__has_virtual_destructor(T)
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> {};
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/* is constructible */
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template<typename, typename T> struct __OctaSelect2nd { typedef T type; };
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struct __OctaAny { __OctaAny(...); };
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template<typename T, typename ...A> typename __OctaSelect2nd<
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decltype(octa::move(T(octa::declval<A>()...))), true_t
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>::type __octa_is_ctible_test(T &&, A &&...);
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template<typename ...A> false_t __octa_is_ctible_test(__OctaAny, A &&...);
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template<bool, typename T, typename ...A>
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struct __OctaCtibleCore: CommonType<
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decltype(__octa_is_ctible_test(octa::declval<T>(),
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octa::declval<A>()...))
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>::type {};
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/* function types are not constructible */
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template<typename R, typename ...A1, typename ...A2>
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struct __OctaCtibleCore<false, R(A1...), A2...>: false_t {};
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/* scalars are default constructible, refs are not */
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template<typename T>
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struct __OctaCtibleCore<true, T>: IsScalar<T> {};
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/* scalars and references are constructible from one arg if
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* implicitly convertible to scalar or reference */
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template<typename T>
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struct __OctaCtibleRef {
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static true_t test(T);
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static false_t test(...);
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};
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template<typename T, typename U>
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struct __OctaCtibleCore<true, T, U>: CommonType<
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decltype(__OctaCtibleRef<T>::test(octa::declval<U>()))
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>::type {};
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/* scalars and references are not constructible from multiple args */
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template<typename T, typename U, typename ...A>
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struct __OctaCtibleCore<true, T, U, A...>: false_t {};
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/* treat scalars and refs separately */
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template<bool, typename T, typename ...A>
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struct __OctaCtibleVoidCheck: __OctaCtibleCore<
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(IsScalar<T>::value || IsReference<T>::value), T, A...
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> {};
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/* if any of T or A is void, IsConstructible should be false */
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template<typename T, typename ...A>
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struct __OctaCtibleVoidCheck<true, T, A...>: false_t {};
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template<typename ...A> struct __OctaCtibleContainsVoid;
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template<> struct __OctaCtibleContainsVoid<>: false_t {};
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template<typename T, typename ...A>
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struct __OctaCtibleContainsVoid<T, A...> {
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static constexpr bool value = IsVoid<T>::value
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|| __OctaCtibleContainsVoid<A...>::value;
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};
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/* entry point */
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template<typename T, typename ...A>
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struct __OctaCtible: __OctaCtibleVoidCheck<
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__OctaCtibleContainsVoid<T, A...>::value || IsAbstract<T>::value,
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T, A...
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> {};
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/* array types are default constructible if their element type is */
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template<typename T, size_t N>
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struct __OctaCtibleCore<false, T[N]>: __OctaCtible<
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typename RemoveAllExtents<T>::type
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> {};
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/* otherwise array types are not constructible by this syntax */
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template<typename T, size_t N, typename ...A>
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struct __OctaCtibleCore<false, T[N], A...>: false_t {};
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/* incomplete array types are not constructible */
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template<typename T, typename ...A>
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struct __OctaCtibleCore<false, T[], A...>: false_t {};
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template<typename T, typename ...A>
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struct IsConstructible: __OctaCtible<T, A...> {};
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/* is default constructible */
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template<typename T> struct IsDefaultConstructible: IsConstructible<T> {};
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/* is copy constructible */
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template<typename T> struct IsCopyConstructible: IsConstructible<T,
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typename AddLvalueReference<typename AddConst<T>::type>::type
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> {};
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/* is move constructible */
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template<typename T> struct IsMoveConstructible: IsConstructible<T,
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typename internal::AddRvalueReference<T>::type
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> {};
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/* is assignable */
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template<typename T, typename U> typename __OctaSelect2nd<
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decltype((octa::declval<T>() = octa::declval<U>())), true_t
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>::type __octa_assign_test(T &&, U &&);
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template<typename T> false_t __octa_assign_test(__OctaAny, T &&);
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template<typename T, typename U, bool = IsVoid<T>::value || IsVoid<U>::value>
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struct __OctaIsAssignable: CommonType<
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decltype(__octa_assign_test(octa::declval<T>(), octa::declval<U>()))
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>::type {};
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template<typename T, typename U>
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struct __OctaIsAssignable<T, U, true>: false_t {};
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template<typename T, typename U>
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struct IsAssignable: __OctaIsAssignable<T, U> {};
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/* is copy assignable */
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template<typename T> struct IsCopyAssignable: IsAssignable<
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typename AddLvalueReference<T>::type,
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typename AddLvalueReference<typename AddConst<T>::type>::type
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> {};
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/* is move assignable */
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template<typename T> struct IsMoveAssignable: IsAssignable<
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typename AddLvalueReference<T>::type,
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const typename internal::AddRvalueReference<T>::type
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> {};
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/* is destructible */
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template<typename> struct __OctaIsDtibleApply { typedef int type; };
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template<typename T> struct IsDestructorWellformed {
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template<typename TT> static char test(typename __OctaIsDtibleApply<
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decltype(octa::declval<TT &>().~TT())
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>::type);
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template<typename TT> static int test(...);
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static constexpr bool value = (sizeof(test<T>(12)) == sizeof(char));
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};
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template<typename, bool> struct __OctaDtibleImpl;
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template<typename T>
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struct __OctaDtibleImpl<T, false>: IntegralConstant<bool,
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IsDestructorWellformed<typename RemoveAllExtents<T>::type>::value
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> {};
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template<typename T>
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struct __OctaDtibleImpl<T, true>: true_t {};
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template<typename T, bool> struct __OctaDtibleFalse;
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template<typename T> struct __OctaDtibleFalse<T, false>
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: __OctaDtibleImpl<T, IsReference<T>::value> {};
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template<typename T> struct __OctaDtibleFalse<T, true>: false_t {};
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template<typename T>
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struct IsDestructible: __OctaDtibleFalse<T, IsFunction<T>::value> {};
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template<typename T> struct IsDestructible<T[] >: false_t {};
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template< > struct IsDestructible<void>: false_t {};
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/* is trivially constructible */
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template<typename T, typename ...A>
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struct IsTriviallyConstructible: false_t {};
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template<typename T>
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struct IsTriviallyConstructible<T>: IntegralConstant<bool,
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__has_trivial_constructor(T)
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> {};
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template<typename T>
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struct IsTriviallyConstructible<T, T &>: IntegralConstant<bool,
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__has_trivial_copy(T)
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> {};
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template<typename T>
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struct IsTriviallyConstructible<T, const T &>: IntegralConstant<bool,
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__has_trivial_copy(T)
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> {};
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template<typename T>
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struct IsTriviallyConstructible<T, T &&>: IntegralConstant<bool,
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__has_trivial_copy(T)
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> {};
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/* is trivially default constructible */
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template<typename T>
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struct IsTriviallyDefaultConstructible: IsTriviallyConstructible<T> {};
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/* is trivially copy constructible */
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template<typename T>
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struct IsTriviallyCopyConstructible: IsTriviallyConstructible<T,
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typename AddLvalueReference<const T>::type
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> {};
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/* is trivially move constructible */
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template<typename T>
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struct IsTriviallyMoveConstructible: IsTriviallyConstructible<T,
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typename internal::AddRvalueReference<T>::type
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> {};
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/* is trivially assignable */
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template<typename T, typename ...A>
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struct IsTriviallyAssignable: false_t {};
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template<typename T>
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struct IsTriviallyAssignable<T>: IntegralConstant<bool,
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__has_trivial_assign(T)
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> {};
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template<typename T>
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struct IsTriviallyAssignable<T, T &>: IntegralConstant<bool,
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__has_trivial_copy(T)
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> {};
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template<typename T>
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struct IsTriviallyAssignable<T, const T &>: IntegralConstant<bool,
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__has_trivial_copy(T)
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> {};
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template<typename T>
|
|
struct IsTriviallyAssignable<T, T &&>: IntegralConstant<bool,
|
|
__has_trivial_copy(T)
|
|
> {};
|
|
|
|
/* is trivially copy assignable */
|
|
|
|
template<typename T>
|
|
struct IsTriviallyCopyAssignable: IsTriviallyAssignable<T,
|
|
typename AddLvalueReference<const T>::type
|
|
> {};
|
|
|
|
/* is trivially move assignable */
|
|
|
|
template<typename T>
|
|
struct IsTriviallyMoveAssignable: IsTriviallyAssignable<T,
|
|
typename internal::AddRvalueReference<T>::type
|
|
> {};
|
|
|
|
/* is trivially destructible */
|
|
|
|
template<typename T>
|
|
struct IsTriviallyDestructible: IntegralConstant<bool,
|
|
__has_trivial_destructor(T)
|
|
> {};
|
|
|
|
/* is nothrow constructible */
|
|
|
|
template<typename T, typename ...A>
|
|
struct IsNothrowConstructible: false_t {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowConstructible<T>: IntegralConstant<bool,
|
|
__has_nothrow_constructor(T)
|
|
> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowConstructible<T, T &>: IntegralConstant<bool,
|
|
__has_nothrow_copy(T)
|
|
> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowConstructible<T, const T &>: IntegralConstant<bool,
|
|
__has_nothrow_copy(T)
|
|
> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowConstructible<T, T &&>: IntegralConstant<bool,
|
|
__has_nothrow_copy(T)
|
|
> {};
|
|
|
|
/* is nothrow default constructible */
|
|
|
|
template<typename T>
|
|
struct IsNothrowDefaultConstructible: IsNothrowConstructible<T> {};
|
|
|
|
/* is nothrow copy constructible */
|
|
|
|
template<typename T>
|
|
struct IsNothrowCopyConstructible: IsNothrowConstructible<T,
|
|
typename AddLvalueReference<const T>::type
|
|
> {};
|
|
|
|
/* is nothrow move constructible */
|
|
|
|
template<typename T>
|
|
struct IsNothrowMoveConstructible: IsNothrowConstructible<T,
|
|
typename internal::AddRvalueReference<T>::type
|
|
> {};
|
|
|
|
/* is nothrow assignable */
|
|
|
|
template<typename T, typename ...A>
|
|
struct IsNothrowAssignable: false_t {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowAssignable<T>: IntegralConstant<bool,
|
|
__has_nothrow_assign(T)
|
|
> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowAssignable<T, T &>: IntegralConstant<bool,
|
|
__has_nothrow_copy(T)
|
|
> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowAssignable<T, const T &>: IntegralConstant<bool,
|
|
__has_nothrow_copy(T)
|
|
> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowAssignable<T, T &&>: IntegralConstant<bool,
|
|
__has_nothrow_copy(T)
|
|
> {};
|
|
|
|
/* is nothrow copy assignable */
|
|
|
|
template<typename T>
|
|
struct IsNothrowCopyAssignable: IsNothrowAssignable<T,
|
|
typename AddLvalueReference<const T>::type
|
|
> {};
|
|
|
|
/* is nothrow move assignable */
|
|
|
|
template<typename T>
|
|
struct IsNothrowMoveAssignable: IsNothrowAssignable<T,
|
|
typename internal::AddRvalueReference<T>::type
|
|
> {};
|
|
|
|
/* is nothrow destructible */
|
|
|
|
template<typename, bool> struct __OctaIsNothrowDtible;
|
|
|
|
template<typename T>
|
|
struct __OctaIsNothrowDtible<T, false>: IntegralConstant<bool,
|
|
noexcept(octa::declval<T>().~T())
|
|
> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowDestructible: __OctaIsNothrowDtible<T,
|
|
IsDestructible<T>::value
|
|
> {};
|
|
|
|
template<typename T, size_t N>
|
|
struct IsNothrowDestructible<T[N]>: IsNothrowDestructible<T> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowDestructible<T &>: IsNothrowDestructible<T> {};
|
|
|
|
template<typename T>
|
|
struct IsNothrowDestructible<T &&>: IsNothrowDestructible<T> {};
|
|
|
|
/* is base of */
|
|
|
|
template<typename B, typename D>
|
|
struct IsBaseOf: IntegralConstant<bool, __is_base_of(B, D)> {};
|
|
|
|
/* is convertible */
|
|
|
|
template<typename F, typename T, bool = IsVoid<F>::value
|
|
|| IsFunction<T>::value || IsArray<T>::value
|
|
> struct __OctaIsConvertible {
|
|
typedef typename IsVoid<T>::type type;
|
|
};
|
|
|
|
template<typename F, typename T> struct __OctaIsConvertible<F, T, false> {
|
|
template<typename TT> static void test_f(TT);
|
|
|
|
template<typename FF, typename TT,
|
|
typename = decltype(test_f<TT>(octa::declval<FF>()))
|
|
> static true_t test(int);
|
|
|
|
template<typename, typename> static false_t test(...);
|
|
|
|
typedef decltype(test<F, T>(0)) type;
|
|
};
|
|
|
|
template<typename F, typename T>
|
|
struct IsConvertible: __OctaIsConvertible<F, T>::type {};
|
|
|
|
/* type equality */
|
|
|
|
template<typename, typename> struct IsSame : false_t {};
|
|
template<typename T > struct IsSame<T, T>: true_t {};
|
|
|
|
/* extent */
|
|
|
|
template<typename T, unsigned I = 0>
|
|
struct Extent: IntegralConstant<size_t, 0> {};
|
|
|
|
template<typename T>
|
|
struct Extent<T[], 0>: IntegralConstant<size_t, 0> {};
|
|
|
|
template<typename T, unsigned I>
|
|
struct Extent<T[], I>: IntegralConstant<size_t, Extent<T, I - 1>::value> {};
|
|
|
|
template<typename T, size_t N>
|
|
struct Extent<T[N], 0>: IntegralConstant<size_t, N> {};
|
|
|
|
template<typename T, size_t N, unsigned I>
|
|
struct Extent<T[N], I>: IntegralConstant<size_t, Extent<T, I - 1>::value> {};
|
|
|
|
/* rank */
|
|
|
|
template<typename T> struct Rank: IntegralConstant<size_t, 0> {};
|
|
|
|
template<typename T>
|
|
struct Rank<T[]>: IntegralConstant<size_t, Rank<T>::value + 1> {};
|
|
|
|
template<typename T, size_t N>
|
|
struct Rank<T[N]>: IntegralConstant<size_t, Rank<T>::value + 1> {};
|
|
|
|
/* remove const, volatile, cv */
|
|
|
|
template<typename T> struct RemoveConst { typedef T type; };
|
|
template<typename T> struct RemoveConst<const T> { typedef T type; };
|
|
|
|
template<typename T> struct RemoveVolatile { typedef T type; };
|
|
template<typename T> struct RemoveVolatile<volatile T> { typedef T type; };
|
|
|
|
template<typename T>
|
|
struct RemoveCV {
|
|
typedef typename RemoveVolatile<typename RemoveConst<T>::type>::type type;
|
|
};
|
|
|
|
/* add const, volatile, cv */
|
|
|
|
template<typename T, bool = IsReference<T>::value
|
|
|| IsFunction<T>::value || IsConst<T>::value>
|
|
struct __OctaAddConst { typedef T type; };
|
|
|
|
template<typename T> struct __OctaAddConst<T, false> {
|
|
typedef const T type;
|
|
};
|
|
|
|
template<typename T> struct AddConst {
|
|
typedef typename __OctaAddConst<T>::type type;
|
|
};
|
|
|
|
template<typename T, bool = IsReference<T>::value
|
|
|| IsFunction<T>::value || IsVolatile<T>::value>
|
|
struct __OctaAddVolatile { typedef T type; };
|
|
|
|
template<typename T> struct __OctaAddVolatile<T, false> {
|
|
typedef volatile T type;
|
|
};
|
|
|
|
template<typename T> struct AddVolatile {
|
|
typedef typename __OctaAddVolatile<T>::type type;
|
|
};
|
|
|
|
template<typename T>
|
|
struct AddCV {
|
|
typedef typename AddConst<typename AddVolatile<T>::type>::type type;
|
|
};
|
|
|
|
/* remove reference */
|
|
|
|
template<typename T> using RemoveReference = internal::RemoveReference<T>;
|
|
|
|
/* remove pointer */
|
|
|
|
template<typename T> struct RemovePointer { typedef T type; };
|
|
template<typename T> struct RemovePointer<T * > { typedef T type; };
|
|
template<typename T> struct RemovePointer<T * const > { typedef T type; };
|
|
template<typename T> struct RemovePointer<T * volatile > { typedef T type; };
|
|
template<typename T> struct RemovePointer<T * const volatile> { typedef T type; };
|
|
|
|
/* add pointer */
|
|
|
|
template<typename T> struct AddPointer {
|
|
typedef typename RemoveReference<T>::type *type;
|
|
};
|
|
|
|
/* add lvalue reference */
|
|
|
|
template<typename T> struct AddLvalueReference { typedef T &type; };
|
|
template<typename T> struct AddLvalueReference<T &> { typedef T &type; };
|
|
template<typename T> struct AddLvalueReference<T &&> { typedef T &type; };
|
|
template<> struct AddLvalueReference<void> {
|
|
typedef void type;
|
|
};
|
|
template<> struct AddLvalueReference<const void> {
|
|
typedef const void type;
|
|
};
|
|
template<> struct AddLvalueReference<volatile void> {
|
|
typedef volatile void type;
|
|
};
|
|
template<> struct AddLvalueReference<const volatile void> {
|
|
typedef const volatile void type;
|
|
};
|
|
|
|
/* add rvalue reference */
|
|
|
|
template<typename T> using AddRvalueReference = internal::AddRvalueReference<T>;
|
|
|
|
/* remove extent */
|
|
|
|
template<typename T > struct RemoveExtent { typedef T type; };
|
|
template<typename T > struct RemoveExtent<T[ ]> { typedef T type; };
|
|
template<typename T, size_t N> struct RemoveExtent<T[N]> { typedef T type; };
|
|
|
|
/* remove all extents */
|
|
|
|
template<typename T> struct RemoveAllExtents { typedef T type; };
|
|
|
|
template<typename T> struct RemoveAllExtents<T[]> {
|
|
typedef typename RemoveAllExtents<T>::type type;
|
|
};
|
|
|
|
template<typename T, size_t N> struct RemoveAllExtents<T[N]> {
|
|
typedef typename RemoveAllExtents<T>::type type;
|
|
};
|
|
|
|
/* make (un)signed
|
|
*
|
|
* this is bad, but i don't see any better way
|
|
* shamelessly copied from graphitemaster @ neothyne
|
|
*/
|
|
|
|
template<typename T, typename U> struct __OctaTL {
|
|
typedef T first;
|
|
typedef U rest;
|
|
};
|
|
|
|
/* not a type */
|
|
struct __OctaNAT {
|
|
__OctaNAT() = delete;
|
|
__OctaNAT(const __OctaNAT &) = delete;
|
|
__OctaNAT &operator=(const __OctaNAT &) = delete;
|
|
~__OctaNAT() = delete;
|
|
};
|
|
|
|
typedef __OctaTL<schar,
|
|
__OctaTL<short,
|
|
__OctaTL<int,
|
|
__OctaTL<long,
|
|
__OctaTL<llong, __OctaNAT>>>>> stypes;
|
|
|
|
typedef __OctaTL<uchar,
|
|
__OctaTL<ushort,
|
|
__OctaTL<uint,
|
|
__OctaTL<ulong,
|
|
__OctaTL<ullong, __OctaNAT>>>>> utypes;
|
|
|
|
template<typename T, size_t N, bool = (N <= sizeof(typename T::first))>
|
|
struct __OctaTypeFindFirst;
|
|
|
|
template<typename T, typename U, size_t N>
|
|
struct __OctaTypeFindFirst<__OctaTL<T, U>, N, true> {
|
|
typedef T type;
|
|
};
|
|
|
|
template<typename T, typename U, size_t N>
|
|
struct __OctaTypeFindFirst<__OctaTL<T, U>, N, false> {
|
|
typedef typename __OctaTypeFindFirst<U, N>::type type;
|
|
};
|
|
|
|
template<typename T, typename U,
|
|
bool = IsConst<typename RemoveReference<T>::type>::value,
|
|
bool = IsVolatile<typename RemoveReference<T>::type>::value
|
|
> struct __OctaApplyCV {
|
|
typedef U type;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct __OctaApplyCV<T, U, true, false> { /* const */
|
|
typedef const U type;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct __OctaApplyCV<T, U, false, true> { /* volatile */
|
|
typedef volatile U type;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct __OctaApplyCV<T, U, true, true> { /* const volatile */
|
|
typedef const volatile U type;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct __OctaApplyCV<T &, U, true, false> { /* const */
|
|
typedef const U &type;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct __OctaApplyCV<T &, U, false, true> { /* volatile */
|
|
typedef volatile U &type;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct __OctaApplyCV<T &, U, true, true> { /* const volatile */
|
|
typedef const volatile U &type;
|
|
};
|
|
|
|
template<typename T, bool = IsIntegral<T>::value || IsEnum<T>::value>
|
|
struct __OctaMakeSigned {};
|
|
|
|
template<typename T, bool = IsIntegral<T>::value || IsEnum<T>::value>
|
|
struct __OctaMakeUnsigned {};
|
|
|
|
template<typename T>
|
|
struct __OctaMakeSigned<T, true> {
|
|
typedef typename __OctaTypeFindFirst<stypes, sizeof(T)>::type type;
|
|
};
|
|
|
|
template<typename T>
|
|
struct __OctaMakeUnsigned<T, true> {
|
|
typedef typename __OctaTypeFindFirst<utypes, sizeof(T)>::type type;
|
|
};
|
|
|
|
template<> struct __OctaMakeSigned<bool , true> {};
|
|
template<> struct __OctaMakeSigned<schar , true> { typedef schar type; };
|
|
template<> struct __OctaMakeSigned<uchar , true> { typedef schar type; };
|
|
template<> struct __OctaMakeSigned<short , true> { typedef short type; };
|
|
template<> struct __OctaMakeSigned<ushort, true> { typedef short type; };
|
|
template<> struct __OctaMakeSigned<int , true> { typedef int type; };
|
|
template<> struct __OctaMakeSigned<uint , true> { typedef int type; };
|
|
template<> struct __OctaMakeSigned<long , true> { typedef long type; };
|
|
template<> struct __OctaMakeSigned<ulong , true> { typedef long type; };
|
|
template<> struct __OctaMakeSigned<llong , true> { typedef llong type; };
|
|
template<> struct __OctaMakeSigned<ullong, true> { typedef llong type; };
|
|
|
|
template<> struct __OctaMakeUnsigned<bool , true> {};
|
|
template<> struct __OctaMakeUnsigned<schar , true> { typedef uchar type; };
|
|
template<> struct __OctaMakeUnsigned<uchar , true> { typedef uchar type; };
|
|
template<> struct __OctaMakeUnsigned<short , true> { typedef ushort type; };
|
|
template<> struct __OctaMakeUnsigned<ushort, true> { typedef ushort type; };
|
|
template<> struct __OctaMakeUnsigned<int , true> { typedef uint type; };
|
|
template<> struct __OctaMakeUnsigned<uint , true> { typedef uint type; };
|
|
template<> struct __OctaMakeUnsigned<long , true> { typedef ulong type; };
|
|
template<> struct __OctaMakeUnsigned<ulong , true> { typedef ulong type; };
|
|
template<> struct __OctaMakeUnsigned<llong , true> { typedef ullong type; };
|
|
template<> struct __OctaMakeUnsigned<ullong, true> { typedef ullong type; };
|
|
|
|
template<typename T> struct MakeSigned {
|
|
typedef typename __OctaApplyCV<T,
|
|
typename __OctaMakeSigned<
|
|
typename RemoveCV<T>::type
|
|
>::type
|
|
>::type type;
|
|
};
|
|
|
|
template<typename T> struct MakeUnsigned {
|
|
typedef typename __OctaApplyCV<T,
|
|
typename __OctaMakeUnsigned<
|
|
typename RemoveCV<T>::type
|
|
>::type
|
|
>::type type;
|
|
};
|
|
|
|
/* conditional */
|
|
|
|
template<bool cond, typename T, typename U>
|
|
struct Conditional {
|
|
typedef T type;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct Conditional<false, T, U> {
|
|
typedef U type;
|
|
};
|
|
|
|
/* result of call at compile time */
|
|
|
|
template<typename F, typename ...A>
|
|
inline auto __octa_rof_invoke(F &&f, A &&...args) ->
|
|
decltype(forward<F>(f)(forward<A>(args)...)) {
|
|
return forward<F>(f)(forward<A>(args)...);
|
|
}
|
|
template<typename B, typename T, typename D>
|
|
inline auto __octa_rof_invoke(T B::*pmd, D &&ref) ->
|
|
decltype(forward<D>(ref).*pmd) {
|
|
return forward<D>(ref).*pmd;
|
|
}
|
|
template<typename PMD, typename P>
|
|
inline auto __octa_rof_invoke(PMD &&pmd, P &&ptr) ->
|
|
decltype((*forward<P>(ptr)).*forward<PMD>(pmd)) {
|
|
return (*forward<P>(ptr)).*forward<PMD>(pmd);
|
|
}
|
|
template<typename B, typename T, typename D, typename ...A>
|
|
inline auto __octa_rof_invoke(T B::*pmf, D &&ref, A &&...args) ->
|
|
decltype((forward<D>(ref).*pmf)(forward<A>(args)...)) {
|
|
return (forward<D>(ref).*pmf)(forward<A>(args)...);
|
|
}
|
|
template<typename PMF, typename P, typename ...A>
|
|
inline auto __octa_rof_invoke(PMF &&pmf, P &&ptr, A &&...args) ->
|
|
decltype(((*forward<P>(ptr)).*forward<PMF>(pmf))(forward<A>(args)...)) {
|
|
return ((*forward<P>(ptr)).*forward<PMF>(pmf))(forward<A>(args)...);
|
|
}
|
|
|
|
template<typename, typename = void>
|
|
struct __OctaResultOf {};
|
|
template<typename F, typename ...A>
|
|
struct __OctaResultOf<F(A...), decltype(void(__octa_rof_invoke(
|
|
octa::declval<F>(), octa::declval<A>()...)))> {
|
|
using type = decltype(__octa_rof_invoke(octa::declval<F>(),
|
|
octa::declval<A>()...));
|
|
};
|
|
|
|
template<typename T> struct ResultOf: __OctaResultOf<T> {};
|
|
|
|
/* enable if */
|
|
|
|
template<bool B, typename T = void> struct EnableIf {};
|
|
|
|
template<typename T> struct EnableIf<true, T> { typedef T type; };
|
|
|
|
/* decay */
|
|
|
|
template<typename T>
|
|
struct Decay {
|
|
private:
|
|
typedef typename RemoveReference<T>::type U;
|
|
public:
|
|
typedef typename Conditional<IsArray<U>::value,
|
|
typename RemoveExtent<U>::type *,
|
|
typename Conditional<IsFunction<U>::value,
|
|
typename AddPointer<U>::type,
|
|
typename RemoveCV<U>::type
|
|
>::type
|
|
>::type type;
|
|
};
|
|
|
|
/* common type */
|
|
|
|
template<typename ...T> struct CommonType;
|
|
|
|
template<typename T> struct CommonType<T> {
|
|
typedef Decay<T> type;
|
|
};
|
|
|
|
template<typename T, typename U> struct CommonType<T, U> {
|
|
typedef Decay<decltype(true ? octa::declval<T>() : octa::declval<U>())> type;
|
|
};
|
|
|
|
template<typename T, typename U, typename ...V>
|
|
struct CommonType<T, U, V...> {
|
|
typedef typename CommonType<typename CommonType<T, U>::type, V...>::type type;
|
|
};
|
|
|
|
/* aligned storage */
|
|
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template<size_t N> struct __OctaAlignedTest {
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union type {
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uchar data[N];
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octa::max_align_t align;
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};
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};
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template<size_t N, size_t A
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= alignof(typename __OctaAlignedTest<N>::type)
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> struct AlignedStorage {
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struct type {
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alignas(A) uchar data[N];
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};
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|
};
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/* aligned union */
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|
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template<size_t ...N> struct __OctaAlignMax;
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|
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template<size_t N> struct __OctaAlignMax<N> {
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static constexpr size_t value = N;
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|
};
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|
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template<size_t N1, size_t N2> struct __OctaAlignMax<N1, N2> {
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static constexpr size_t value = (N1 > N2) ? N1 : N2;
|
|
};
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|
|
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template<size_t N1, size_t N2, size_t ...N>
|
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struct __OctaAlignMax<N1, N2, N...> {
|
|
static constexpr size_t value
|
|
= __OctaAlignMax<__OctaAlignMax<N1, N2>::value, N...>::value;
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|
};
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|
|
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template<size_t N, typename ...T> struct AlignedUnion {
|
|
static constexpr size_t alignment_value
|
|
= __OctaAlignMax<alignof(T)...>::value;
|
|
|
|
struct type {
|
|
alignas(alignment_value) uchar data[__OctaAlignMax<N,
|
|
sizeof(T)...>::value];
|
|
};
|
|
};
|
|
|
|
/* underlying type */
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|
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template<typename T, bool = IsEnum<T>::value> struct __OctaUnderlyingType;
|
|
|
|
template<typename T> struct __OctaUnderlyingType<T, true> {
|
|
typedef typename Conditional<IsSigned<T>::value,
|
|
typename MakeSigned<T>::type,
|
|
typename MakeUnsigned<T>::type
|
|
>::type type;
|
|
};
|
|
|
|
template<typename T> struct UnderlyingType {
|
|
typedef typename __OctaUnderlyingType<T>::type type;
|
|
};
|
|
}
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#endif |