1162 lines
33 KiB
C++
1162 lines
33 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 OSTD_TYPE_TRAITS_HH
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#define OSTD_TYPE_TRAITS_HH
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#include <stddef.h>
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#include "ostd/types.hh"
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namespace ostd {
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/* forward declarations */
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namespace detail {
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template<typename> struct RemoveCvBase;
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template<typename> struct AddLr;
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template<typename> struct AddRr;
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template<typename> struct AddConstBase;
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template<typename> struct RemoveReferenceBase;
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template<typename> struct RemoveAllExtentsBase;
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template<typename ...> struct CommonTypeBase;
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}
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template<typename T>
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using RemoveCv = typename detail::RemoveCvBase<T>::Type;
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template<typename T>
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using AddLvalueReference = typename detail::AddLr<T>::Type;
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template<typename T>
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using AddRvalueReference = typename detail::AddRr<T>::Type;
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template<typename T>
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using AddConst = typename detail::AddConstBase<T>::Type;
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template<typename T>
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using RemoveReference = typename detail::RemoveReferenceBase<T>::Type;
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template<typename T>
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using RemoveAllExtents = typename detail::RemoveAllExtentsBase<T>::Type;
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namespace detail {
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template<typename T> AddRvalueReference<T> declval_in();
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}
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/* integral constant */
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template<typename T, T val>
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struct Constant {
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static constexpr T value = val;
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using Value = T;
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using Type = Constant<T, val>;
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constexpr operator Value() const { return value; }
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constexpr Value operator()() const { return value; }
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};
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template<bool val>
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using BoolConstant = Constant<bool, val>;
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using True = BoolConstant<true>;
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using False = BoolConstant<false>;
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template<typename T, T val> constexpr T Constant<T, val>::value;
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/* type equality */
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template<typename, typename> constexpr bool IsSame = false;
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template<typename T > constexpr bool IsSame<T, T> = true;
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/* is void */
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template<typename T>
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constexpr bool IsVoid = IsSame<RemoveCv<T>, void>;
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/* is null pointer */
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template<typename T>
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constexpr bool IsNullPointer = IsSame<RemoveCv<T>, Nullptr>;
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/* is integer */
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namespace detail {
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template<typename> constexpr bool IsIntegralBase = false;
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template<> constexpr bool IsIntegralBase<bool > = true;
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template<> constexpr bool IsIntegralBase<char > = true;
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template<> constexpr bool IsIntegralBase<short > = true;
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template<> constexpr bool IsIntegralBase<int > = true;
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template<> constexpr bool IsIntegralBase<long > = true;
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template<> constexpr bool IsIntegralBase<sbyte > = true;
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template<> constexpr bool IsIntegralBase<byte > = true;
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template<> constexpr bool IsIntegralBase<ushort> = true;
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template<> constexpr bool IsIntegralBase<uint > = true;
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template<> constexpr bool IsIntegralBase<ulong > = true;
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template<> constexpr bool IsIntegralBase<llong > = true;
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template<> constexpr bool IsIntegralBase<ullong> = true;
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template<> constexpr bool IsIntegralBase<Char16> = true;
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template<> constexpr bool IsIntegralBase<Char32> = true;
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template<> constexpr bool IsIntegralBase<Wchar > = true;
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}
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template<typename T>
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constexpr bool IsIntegral = detail::IsIntegralBase<RemoveCv<T>>;
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/* is floating point */
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namespace detail {
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template<typename> constexpr bool IsFloatingPointBase = false;
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template<> constexpr bool IsFloatingPointBase<float > = true;
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template<> constexpr bool IsFloatingPointBase<double> = true;
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template<> constexpr bool IsFloatingPointBase<ldouble> = true;
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}
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template<typename T>
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constexpr bool IsFloatingPoint = detail::IsFloatingPointBase<RemoveCv<T>>;
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/* is array */
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template<typename > constexpr bool IsArray = false;
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template<typename T > constexpr bool IsArray<T[ ]> = true;
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template<typename T, Size N> constexpr bool IsArray<T[N]> = true;
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/* is pointer */
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namespace detail {
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template<typename > constexpr bool IsPointerBase = false;
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template<typename T> constexpr bool IsPointerBase<T *> = true;
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}
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template<typename T>
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constexpr bool IsPointer = detail::IsPointerBase<RemoveCv<T>>;
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/* is lvalue reference */
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template<typename > constexpr bool IsLvalueReference = false;
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template<typename T> constexpr bool IsLvalueReference<T &> = true;
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/* is rvalue reference */
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template<typename > constexpr bool IsRvalueReference = false;
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template<typename T> constexpr bool IsRvalueReference<T &&> = true;
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/* is reference */
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template<typename T>
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constexpr bool IsReference = IsLvalueReference<T> || IsRvalueReference<T>;
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/* is enum */
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template<typename T> constexpr bool IsEnum = __is_enum(T);
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/* is union */
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template<typename T> constexpr bool IsUnion = __is_union(T);
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/* is class */
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template<typename T> constexpr bool IsClass = __is_class(T);
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/* is function */
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namespace detail {
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struct FunctionTestDummy {};
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template<typename T> char function_test(T *);
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template<typename T> char function_test(FunctionTestDummy);
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template<typename T> int function_test(...);
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template<typename T> T &function_source(int);
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template<typename T> FunctionTestDummy function_source(...);
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template<typename T, bool = IsClass<T> ||
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IsUnion<T> ||
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IsVoid<T> ||
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IsReference<T> ||
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IsNullPointer<T>>
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constexpr bool IsFunctionBase
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= sizeof(function_test<T>(function_source<T>(0))) == 1;
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template<typename T> constexpr bool IsFunctionBase<T, true> = false;
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} /* namespace detail */
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template<typename T>
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constexpr bool IsFunction = detail::IsFunctionBase<T>;
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/* is arithmetic */
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template<typename T>
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constexpr bool IsArithmetic = IsIntegral<T> || IsFloatingPoint<T>;
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/* is fundamental */
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template<typename T>
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constexpr bool IsFundamental = IsArithmetic<T> || IsVoid<T> || IsNullPointer<T>;
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/* is compound */
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template<typename T>
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constexpr bool IsCompound = !IsFundamental<T>;
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/* is pointer to member */
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namespace detail {
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template<typename> constexpr bool IsMemberPointerBase = false;
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template<typename T, typename U>
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constexpr bool IsMemberPointerBase<T U::*> = true;
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}
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template<typename T>
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constexpr bool IsMemberPointer = detail::IsMemberPointerBase<RemoveCv<T>>;
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/* is pointer to member object */
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namespace detail {
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template<typename> constexpr bool IsMemberObjectPointerBase = false;
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template<typename T, typename U>
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constexpr bool IsMemberObjectPointerBase<T U::*> = !IsFunction<T>;
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}
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template<typename T>
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constexpr bool IsMemberObjectPointer = detail::IsMemberObjectPointerBase<RemoveCv<T>>;
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/* is pointer to member function */
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namespace detail {
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template<typename> constexpr bool IsMemberFunctionPointerBase = false;
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template<typename T, typename U>
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constexpr bool IsMemberFunctionPointerBase<T U::*> = IsFunction<T>;
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}
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template<typename T>
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constexpr bool IsMemberFunctionPointer = detail::IsMemberFunctionPointerBase<RemoveCv<T>>;
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/* is object */
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template<typename T>
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constexpr bool IsObject = !IsFunction<T> && !IsVoid<T> && !IsReference<T>;
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/* is scalar */
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template<typename T> constexpr bool IsScalar
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= IsMemberPointer<T> || IsPointer<T> || IsEnum<T> ||
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IsNullPointer <T> || IsArithmetic<T>;
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/* is abstract */
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template<typename T> constexpr bool IsAbstract = __is_abstract(T);
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/* is const */
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template<typename T>
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constexpr bool IsConst = IsSame<T, const T>;
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/* is volatile */
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template<typename T>
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constexpr bool IsVolatile = IsSame<T, volatile T>;
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/* is empty */
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template<typename T> constexpr bool IsEmpty = __is_empty(T);
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/* is POD */
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template<typename T> constexpr bool IsPod = __is_pod(T);
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/* is polymorphic */
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template<typename T> constexpr bool IsPolymorphic = __is_polymorphic(T);
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/* is signed */
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namespace detail {
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template<typename T> constexpr bool IsSignedCore = T(-1) < T(0);
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template<typename T, bool = IsArithmetic<T>>
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constexpr bool IsSignedBase = false;
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template<typename T>
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constexpr bool IsSignedBase<T, true> = detail::IsSignedCore<T>;
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}
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template<typename T>
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constexpr bool IsSigned = detail::IsSignedBase<T>;
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/* is unsigned */
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namespace detail {
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template<typename T> constexpr bool IsUnsignedCore = T(0) < T(-1);
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template<typename T, bool = IsArithmetic<T>>
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constexpr bool IsUnsignedBase = false;
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template<typename T>
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constexpr bool IsUnsignedBase<T, true> = detail::IsUnsignedCore<T>;
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}
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template<typename T>
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constexpr bool IsUnsigned = detail::IsUnsignedBase<T>;
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/* is standard layout */
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template<typename T>
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constexpr bool IsStandardLayout = __is_standard_layout(T);
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/* is literal type */
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template<typename T>
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constexpr bool IsLiteralType = __is_literal_type(T);
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/* is trivially copyable */
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template<typename T>
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constexpr bool IsTriviallyCopyable = IsScalar<RemoveAllExtents<T>>;
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/* is trivial */
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template<typename T> constexpr bool IsTrivial = __is_trivial(T);
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/* has virtual destructor */
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template<typename T>
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constexpr bool HasVirtualDestructor = __has_virtual_destructor(T);
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/* is constructible */
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namespace detail {
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#define OSTD_MOVE(v) static_cast<RemoveReference<decltype(v)> &&>(v)
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template<typename, typename T> struct Select2nd { using Type = T; };
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struct Any { Any(...); };
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template<typename T, typename ...A> typename Select2nd<
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decltype(OSTD_MOVE(T(declval_in<A>()...))), True
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>::Type is_ctible_test(T &&, A &&...);
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#undef OSTD_MOVE
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template<typename ...A> False is_ctible_test(Any, A &&...);
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template<bool, typename T, typename ...A>
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constexpr bool CtibleCore = CommonTypeBase<
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decltype(is_ctible_test(declval_in<T>(), declval_in<A>()...))
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>::Type::value;
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/* function types are not constructible */
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template<typename R, typename ...A1, typename ...A2>
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constexpr bool CtibleCore<false, R(A1...), A2...> = false;
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/* scalars are default constructible, refs are not */
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template<typename T>
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constexpr bool CtibleCore<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 CtibleRef {
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static True test(T);
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static False test(...);
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};
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template<typename T, typename U>
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constexpr bool CtibleCore<true, T, U> = CommonTypeBase<
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decltype(CtibleRef<T>::test(declval_in<U>()))
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>::Type::value;
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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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constexpr bool CtibleCore<true, T, U, A...> = false;
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/* treat scalars and refs separately */
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template<bool, typename T, typename ...A>
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constexpr bool CtibleVoidCheck = CtibleCore<
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(IsScalar<T> || IsReference<T>), 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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constexpr bool CtibleVoidCheck<true, T, A...> = false;
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template<typename ...A> constexpr bool CtibleContainsVoid = false;
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template<> constexpr bool CtibleContainsVoid<> = false;
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template<typename T, typename ...A>
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constexpr bool CtibleContainsVoid<T, A...>
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= IsVoid<T> || CtibleContainsVoid<A...>;
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/* entry point */
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template<typename T, typename ...A>
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constexpr bool Ctible = CtibleVoidCheck<
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CtibleContainsVoid<T, A...> || IsAbstract<T>, 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 N>
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constexpr bool CtibleCore<false, T[N]> = Ctible<RemoveAllExtents<T>>;
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/* otherwise array types are not constructible by this syntax */
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template<typename T, Size N, typename ...A>
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constexpr bool CtibleCore<false, T[N], A...> = false;
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/* incomplete array types are not constructible */
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template<typename T, typename ...A>
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constexpr bool CtibleCore<false, T[], A...> = false;
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} /* namespace detail */
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template<typename T, typename ...A>
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constexpr bool IsConstructible = detail::Ctible<T, A...>;
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/* is default constructible */
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template<typename T>
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constexpr bool IsDefaultConstructible = IsConstructible<T>;
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/* is copy constructible */
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template<typename T>
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constexpr bool IsCopyConstructible = IsConstructible<T,
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AddLvalueReference<AddConst<T>>
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>;
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/* is move constructible */
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template<typename T>
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constexpr bool IsMoveConstructible = IsConstructible<T,
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AddRvalueReference<T>
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>;
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/* is assignable */
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namespace detail {
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template<typename T, typename U> typename detail::Select2nd<
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decltype((declval_in<T>() = declval_in<U>())), True
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>::Type assign_test(T &&, U &&);
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template<typename T> False assign_test(Any, T &&);
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template<typename T, typename U, bool = IsVoid<T> || IsVoid<U>>
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constexpr bool IsAssignableBase = CommonTypeBase<
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decltype(assign_test(declval_in<T>(), declval_in<U>()))
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>::Type::value;
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template<typename T, typename U>
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constexpr bool IsAssignableBase<T, U, true> = false;
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} /* namespace detail */
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template<typename T, typename U>
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constexpr bool IsAssignable = detail::IsAssignableBase<T, U>;
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/* is copy assignable */
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template<typename T>
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constexpr bool IsCopyAssignable = IsAssignable<
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AddLvalueReference<T>,
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AddLvalueReference<AddConst<T>>
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>;
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/* is move assignable */
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template<typename T>
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constexpr bool IsMoveAssignable = IsAssignable<
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AddLvalueReference<T>,
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const AddRvalueReference<T>
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>;
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/* is destructible */
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namespace detail {
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template<typename> struct IsDtibleApply { using Type = int; };
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template<typename T> struct IsDestructorWellformed {
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template<typename TT> static char test(typename IsDtibleApply<
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decltype(detail::declval_in<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> constexpr bool DtibleImpl = false;
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template<typename T>
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constexpr bool DtibleImpl<T, false>
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= IsDestructorWellformed<RemoveAllExtents<T>>::value;
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template<typename T>
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constexpr bool DtibleImpl<T, true> = true;
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template<typename T, bool> constexpr bool DtibleFalse = false;
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template<typename T> constexpr bool DtibleFalse<T, false>
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= DtibleImpl<T, IsReference<T>>;
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template<typename T> constexpr bool DtibleFalse<T, true> = false;
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template<typename T>
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constexpr bool IsDestructibleBase = detail::DtibleFalse<T, IsFunction<T>>;
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template<typename T> constexpr bool IsDestructibleBase<T[] > = false;
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template< > constexpr bool IsDestructibleBase<void> = false;
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} /* namespace detail */
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template<typename T>
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constexpr bool IsDestructible = detail::IsDestructibleBase<T>;
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/* is trivially constructible */
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namespace detail {
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template<typename T, typename ...A>
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constexpr bool IsTriviallyConstructibleBase = false;
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template<typename T>
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constexpr bool IsTriviallyConstructibleBase<T>
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= __has_trivial_constructor(T);
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template<typename T>
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constexpr bool IsTriviallyConstructibleBase<T, T &>
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= __has_trivial_copy(T);
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template<typename T>
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constexpr bool IsTriviallyConstructibleBase<T, const T &>
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= __has_trivial_copy(T);
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template<typename T>
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constexpr bool IsTriviallyConstructibleBase<T, T &&>
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= __has_trivial_copy(T);
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} /* namespace detail */
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template<typename T, typename ...A>
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constexpr bool IsTriviallyConstructible
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= detail::IsTriviallyConstructibleBase<T, A...>;
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/* is trivially default constructible */
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template<typename T> constexpr bool IsTriviallyDefaultConstructible
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= IsTriviallyConstructible<T>;
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/* is trivially copy constructible */
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template<typename T> constexpr bool IsTriviallyCopyConstructible
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= IsTriviallyConstructible<T, AddLvalueReference<const T>>;
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/* is trivially move constructible */
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template<typename T> constexpr bool IsTriviallyMoveConstructible
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= IsTriviallyConstructible<T, AddRvalueReference<T>>;
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/* is trivially assignable */
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namespace detail {
|
|
template<typename T, typename ...A>
|
|
constexpr bool IsTriviallyAssignableBase = false;
|
|
|
|
template<typename T>
|
|
constexpr bool IsTriviallyAssignableBase<T>
|
|
= __has_trivial_assign(T);
|
|
|
|
template<typename T>
|
|
constexpr bool IsTriviallyAssignableBase<T, T &>
|
|
= __has_trivial_copy(T);
|
|
|
|
template<typename T>
|
|
constexpr bool IsTriviallyAssignableBase<T, const T &>
|
|
= __has_trivial_copy(T);
|
|
|
|
template<typename T>
|
|
constexpr bool IsTriviallyAssignableBase<T, T &&>
|
|
= __has_trivial_copy(T);
|
|
} /* namespace detail */
|
|
|
|
template<typename T, typename ...A>
|
|
constexpr bool IsTriviallyAssignable
|
|
= detail::IsTriviallyAssignableBase<T>;
|
|
|
|
/* is trivially copy assignable */
|
|
|
|
template<typename T> constexpr bool IsTriviallyCopyAssignable
|
|
= IsTriviallyAssignable<T, AddLvalueReference<const T>>;
|
|
|
|
/* is trivially move assignable */
|
|
|
|
template<typename T> constexpr bool IsTriviallyMoveAssignable
|
|
= IsTriviallyAssignable<T, AddRvalueReference<T>>;
|
|
|
|
/* is trivially destructible */
|
|
|
|
template<typename T>
|
|
constexpr bool IsTriviallyDestructible = __has_trivial_destructor(T);
|
|
|
|
/* is base of */
|
|
|
|
template<typename B, typename D>
|
|
constexpr bool IsBaseOf = __is_base_of(B, D);
|
|
|
|
/* is convertible */
|
|
|
|
namespace detail {
|
|
template<typename F, typename T, bool = IsVoid<F>
|
|
|| IsFunction<T> || IsArray<T>
|
|
> struct IsConvertibleBase {
|
|
static constexpr bool value = IsVoid<T>;
|
|
};
|
|
|
|
template<typename F, typename T>
|
|
struct IsConvertibleBase<F, T, false> {
|
|
template<typename TT> static void test_f(TT);
|
|
|
|
template<typename FF, typename TT,
|
|
typename = decltype(test_f<TT>(declval_in<FF>()))
|
|
> static True test(int);
|
|
|
|
template<typename, typename> static False test(...);
|
|
|
|
static constexpr bool value = decltype(test<F, T>(0))::value;
|
|
};
|
|
}
|
|
|
|
template<typename F, typename T> constexpr bool IsConvertible
|
|
= detail::IsConvertibleBase<F, T>::value;
|
|
|
|
/* extent */
|
|
|
|
namespace detail {
|
|
template<typename, uint> constexpr Size ExtentBase = 0;
|
|
|
|
template<typename T>
|
|
constexpr Size ExtentBase<T[], 0> = 0;
|
|
|
|
template<typename T, uint I>
|
|
constexpr Size ExtentBase<T[], I> = detail::ExtentBase<T, I - 1>;
|
|
|
|
template<typename T, Size N>
|
|
constexpr Size ExtentBase<T[N], 0> = N;
|
|
|
|
template<typename T, Size N, uint I>
|
|
constexpr Size ExtentBase<T[N], I> = detail::ExtentBase<T, I - 1>;
|
|
} /* namespace detail */
|
|
|
|
template<typename T, uint I = 0>
|
|
constexpr Size Extent = detail::ExtentBase<T, I>;
|
|
|
|
/* rank */
|
|
|
|
namespace detail {
|
|
template<typename> constexpr Size RankBase = 0;
|
|
|
|
template<typename T>
|
|
constexpr Size RankBase<T[]> = detail::RankBase<T> + 1;
|
|
|
|
template<typename T, Size N>
|
|
constexpr Size RankBase<T[N]> = detail::RankBase<T> + 1;
|
|
}
|
|
|
|
template<typename T> constexpr Size Rank = detail::RankBase<T>;
|
|
|
|
/* remove const, volatile, cv */
|
|
|
|
namespace detail {
|
|
template<typename T>
|
|
struct RemoveConstBase { using Type = T; };
|
|
template<typename T>
|
|
struct RemoveConstBase<const T> { using Type = T; };
|
|
|
|
template<typename T>
|
|
struct RemoveVolatileBase { using Type = T; };
|
|
template<typename T>
|
|
struct RemoveVolatileBase<volatile T> { using Type = T; };
|
|
}
|
|
|
|
template<typename T>
|
|
using RemoveConst = typename detail::RemoveConstBase<T>::Type;
|
|
template<typename T>
|
|
using RemoveVolatile = typename detail::RemoveVolatileBase<T>::Type;
|
|
|
|
namespace detail {
|
|
template<typename T>
|
|
struct RemoveCvBase {
|
|
using Type = RemoveVolatile<RemoveConst<T>>;
|
|
};
|
|
}
|
|
|
|
/* add const, volatile, cv */
|
|
|
|
namespace detail {
|
|
template<typename T, bool = IsReference<T> || IsFunction<T> || IsConst<T>>
|
|
struct AddConstCore { using Type = T; };
|
|
|
|
template<typename T> struct AddConstCore<T, false> {
|
|
using Type = const T;
|
|
};
|
|
|
|
template<typename T> struct AddConstBase {
|
|
using Type = typename AddConstCore<T>::Type;
|
|
};
|
|
|
|
template<typename T, bool = IsReference<T> || IsFunction<T> || IsVolatile<T>>
|
|
struct AddVolatileCore { using Type = T; };
|
|
|
|
template<typename T> struct AddVolatileCore<T, false> {
|
|
using Type = volatile T;
|
|
};
|
|
|
|
template<typename T> struct AddVolatileBase {
|
|
using Type = typename AddVolatileCore<T>::Type;
|
|
};
|
|
}
|
|
|
|
template<typename T>
|
|
using AddVolatile = typename detail::AddVolatileBase<T>::Type;
|
|
|
|
namespace detail {
|
|
template<typename T>
|
|
struct AddCvBase {
|
|
using Type = AddConst<AddVolatile<T>>;
|
|
};
|
|
}
|
|
|
|
template<typename T>
|
|
using AddCv = typename detail::AddCvBase<T>::Type;
|
|
|
|
/* remove reference */
|
|
|
|
namespace detail {
|
|
template<typename T>
|
|
struct RemoveReferenceBase { using Type = T; };
|
|
template<typename T>
|
|
struct RemoveReferenceBase<T &> { using Type = T; };
|
|
template<typename T>
|
|
struct RemoveReferenceBase<T &&> { using Type = T; };
|
|
}
|
|
|
|
/* remove pointer */
|
|
|
|
namespace detail {
|
|
template<typename T>
|
|
struct RemovePointerBase { using Type = T; };
|
|
template<typename T>
|
|
struct RemovePointerBase<T * > { using Type = T; };
|
|
template<typename T>
|
|
struct RemovePointerBase<T * const > { using Type = T; };
|
|
template<typename T>
|
|
struct RemovePointerBase<T * volatile > { using Type = T; };
|
|
template<typename T>
|
|
struct RemovePointerBase<T * const volatile> { using Type = T; };
|
|
}
|
|
|
|
template<typename T>
|
|
using RemovePointer = typename detail::RemovePointerBase<T>::Type;
|
|
|
|
/* add pointer */
|
|
|
|
namespace detail {
|
|
template<typename T> struct AddPointerBase {
|
|
using Type = RemoveReference<T> *;
|
|
};
|
|
}
|
|
|
|
template<typename T>
|
|
using AddPointer = typename detail::AddPointerBase<T>::Type;
|
|
|
|
/* add lvalue reference */
|
|
|
|
namespace detail {
|
|
template<typename T> struct AddLr { using Type = T &; };
|
|
template<typename T> struct AddLr<T &> { using Type = T &; };
|
|
template<> struct AddLr<void> {
|
|
using Type = void;
|
|
};
|
|
template<> struct AddLr<const void> {
|
|
using Type = const void;
|
|
};
|
|
template<> struct AddLr<volatile void> {
|
|
using Type = volatile void;
|
|
};
|
|
template<> struct AddLr<const volatile void> {
|
|
using Type = const volatile void;
|
|
};
|
|
}
|
|
|
|
/* add rvalue reference */
|
|
|
|
namespace detail {
|
|
template<typename T> struct AddRr { using Type = T &&; };
|
|
template<> struct AddRr<void> {
|
|
using Type = void;
|
|
};
|
|
template<> struct AddRr<const void> {
|
|
using Type = const void;
|
|
};
|
|
template<> struct AddRr<volatile void> {
|
|
using Type = volatile void;
|
|
};
|
|
template<> struct AddRr<const volatile void> {
|
|
using Type = const volatile void;
|
|
};
|
|
}
|
|
|
|
/* remove extent */
|
|
|
|
namespace detail {
|
|
template<typename T>
|
|
struct RemoveExtentBase { using Type = T; };
|
|
template<typename T>
|
|
struct RemoveExtentBase<T[ ]> { using Type = T; };
|
|
template<typename T, Size N>
|
|
struct RemoveExtentBase<T[N]> { using Type = T; };
|
|
}
|
|
|
|
template<typename T>
|
|
using RemoveExtent = typename detail::RemoveExtentBase<T>::Type;
|
|
|
|
/* remove all extents */
|
|
|
|
namespace detail {
|
|
template<typename T> struct RemoveAllExtentsBase { using Type = T; };
|
|
|
|
template<typename T> struct RemoveAllExtentsBase<T[]> {
|
|
using Type = RemoveAllExtentsBase<T>;
|
|
};
|
|
|
|
template<typename T, Size N> struct RemoveAllExtentsBase<T[N]> {
|
|
using Type = RemoveAllExtentsBase<T>;
|
|
};
|
|
}
|
|
|
|
/* make (un)signed
|
|
*
|
|
* this is bad, but i don't see any better way
|
|
* shamelessly copied from graphitemaster @ neothyne
|
|
*/
|
|
|
|
namespace detail {
|
|
template<typename T, typename U> struct TypeList {
|
|
using First = T;
|
|
using Rest = U;
|
|
};
|
|
|
|
/* not a type */
|
|
struct TlNat {
|
|
TlNat() = delete;
|
|
TlNat(const TlNat &) = delete;
|
|
TlNat &operator=(const TlNat &) = delete;
|
|
~TlNat() = delete;
|
|
};
|
|
|
|
using Stypes = TypeList<sbyte,
|
|
TypeList<short,
|
|
TypeList<int,
|
|
TypeList<long,
|
|
TypeList<llong, TlNat>>>>>;
|
|
|
|
using Utypes = TypeList<byte,
|
|
TypeList<ushort,
|
|
TypeList<uint,
|
|
TypeList<ulong,
|
|
TypeList<ullong, TlNat>>>>>;
|
|
|
|
template<typename T, Size N, bool = (N <= sizeof(typename T::First))>
|
|
struct TypeFindFirst;
|
|
|
|
template<typename T, typename U, Size N>
|
|
struct TypeFindFirst<TypeList<T, U>, N, true> {
|
|
using Type = T;
|
|
};
|
|
|
|
template<typename T, typename U, Size N>
|
|
struct TypeFindFirst<TypeList<T, U>, N, false> {
|
|
using Type = typename TypeFindFirst<U, N>::Type;
|
|
};
|
|
|
|
template<typename T, typename U,
|
|
bool = IsConst<RemoveReference<T>>,
|
|
bool = IsVolatile<RemoveReference<T>>
|
|
> struct ApplyCv {
|
|
using Type = U;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct ApplyCv<T, U, true, false> { /* const */
|
|
using Type = const U;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct ApplyCv<T, U, false, true> { /* volatile */
|
|
using Type = volatile U;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct ApplyCv<T, U, true, true> { /* const volatile */
|
|
using Type = const volatile U;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct ApplyCv<T &, U, true, false> { /* const */
|
|
using Type = const U &;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct ApplyCv<T &, U, false, true> { /* volatile */
|
|
using Type = volatile U &;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct ApplyCv<T &, U, true, true> { /* const volatile */
|
|
using Type = const volatile U &;
|
|
};
|
|
|
|
template<typename T, bool = IsIntegral<T> || IsEnum<T>>
|
|
struct MakeSignedCore {};
|
|
|
|
template<typename T, bool = IsIntegral<T> || IsEnum<T>>
|
|
struct MakeUnsignedCore {};
|
|
|
|
template<typename T>
|
|
struct MakeSignedCore<T, true> {
|
|
using Type = typename TypeFindFirst<Stypes, sizeof(T)>::Type;
|
|
};
|
|
|
|
template<typename T>
|
|
struct MakeUnsignedCore<T, true> {
|
|
using Type = typename TypeFindFirst<Utypes, sizeof(T)>::Type;
|
|
};
|
|
|
|
template<> struct MakeSignedCore<bool , true> {};
|
|
template<> struct MakeSignedCore<short , true> { using Type = short; };
|
|
template<> struct MakeSignedCore<int , true> { using Type = int; };
|
|
template<> struct MakeSignedCore<long , true> { using Type = long; };
|
|
|
|
template<> struct MakeSignedCore<sbyte , true> { using Type = sbyte; };
|
|
template<> struct MakeSignedCore<byte , true> { using Type = sbyte; };
|
|
template<> struct MakeSignedCore<ushort, true> { using Type = short; };
|
|
template<> struct MakeSignedCore<uint , true> { using Type = int; };
|
|
template<> struct MakeSignedCore<ulong , true> { using Type = long; };
|
|
template<> struct MakeSignedCore<llong , true> { using Type = llong; };
|
|
template<> struct MakeSignedCore<ullong, true> { using Type = llong; };
|
|
|
|
template<> struct MakeUnsignedCore<bool , true> {};
|
|
template<> struct MakeUnsignedCore<short , true> { using Type = ushort; };
|
|
template<> struct MakeUnsignedCore<int , true> { using Type = uint; };
|
|
template<> struct MakeUnsignedCore<long , true> { using Type = ulong; };
|
|
|
|
template<> struct MakeUnsignedCore<sbyte , true> { using Type = byte; };
|
|
template<> struct MakeUnsignedCore<byte , true> { using Type = byte; };
|
|
template<> struct MakeUnsignedCore<ushort, true> { using Type = ushort; };
|
|
template<> struct MakeUnsignedCore<uint , true> { using Type = uint; };
|
|
template<> struct MakeUnsignedCore<ulong , true> { using Type = ulong; };
|
|
template<> struct MakeUnsignedCore<llong , true> { using Type = ullong; };
|
|
template<> struct MakeUnsignedCore<ullong, true> { using Type = ullong; };
|
|
|
|
template<typename T> struct MakeSignedBase {
|
|
using Type = typename ApplyCv<T,
|
|
typename MakeSignedCore<RemoveCv<T>>::Type
|
|
>::Type;
|
|
};
|
|
|
|
template<typename T> struct MakeUnsignedBase {
|
|
using Type = typename ApplyCv<T,
|
|
typename MakeUnsignedCore<RemoveCv<T>>::Type
|
|
>::Type;
|
|
};
|
|
} /* namespace detail */
|
|
|
|
template<typename T>
|
|
using MakeSigned = typename detail::MakeSignedBase<T>::Type;
|
|
template<typename T>
|
|
using MakeUnsigned = typename detail::MakeUnsignedBase<T>::Type;
|
|
|
|
/* conditional */
|
|
|
|
namespace detail {
|
|
template<bool _cond, typename T, typename U>
|
|
struct ConditionalBase {
|
|
using Type = T;
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
struct ConditionalBase<false, T, U> {
|
|
using Type = U;
|
|
};
|
|
}
|
|
|
|
template<bool _cond, typename T, typename U>
|
|
using Conditional = typename detail::ConditionalBase<_cond, T, U>::Type;
|
|
|
|
/* result of call at compile time */
|
|
|
|
namespace detail {
|
|
#define OSTD_FWD(T, _v) static_cast<T &&>(_v)
|
|
template<typename F, typename ...A>
|
|
inline auto rof_invoke(F &&f, A &&...args) ->
|
|
decltype(OSTD_FWD(F, f)(OSTD_FWD(A, args)...)) {
|
|
return OSTD_FWD(F, f)(OSTD_FWD(A, args)...);
|
|
}
|
|
template<typename B, typename T, typename D>
|
|
inline auto rof_invoke(T B::*pmd, D &&ref) ->
|
|
decltype(OSTD_FWD(D, ref).*pmd) {
|
|
return OSTD_FWD(D, ref).*pmd;
|
|
}
|
|
template<typename PMD, typename P>
|
|
inline auto rof_invoke(PMD &&pmd, P &&ptr) ->
|
|
decltype((*OSTD_FWD(P, ptr)).*OSTD_FWD(PMD, pmd)) {
|
|
return (*OSTD_FWD(P, ptr)).*OSTD_FWD(PMD, pmd);
|
|
}
|
|
template<typename B, typename T, typename D, typename ...A>
|
|
inline auto rof_invoke(T B::*pmf, D &&ref, A &&...args) ->
|
|
decltype((OSTD_FWD(D, ref).*pmf)(OSTD_FWD(A, args)...)) {
|
|
return (OSTD_FWD(D, ref).*pmf)(OSTD_FWD(A, args)...);
|
|
}
|
|
template<typename PMF, typename P, typename ...A>
|
|
inline auto rof_invoke(PMF &&pmf, P &&ptr, A &&...args) ->
|
|
decltype(((*OSTD_FWD(P, ptr)).*OSTD_FWD(PMF, pmf))
|
|
(OSTD_FWD(A, args)...)) {
|
|
return ((*OSTD_FWD(P, ptr)).*OSTD_FWD(PMF, pmf))
|
|
(OSTD_FWD(A, args)...);
|
|
}
|
|
#undef OSTD_FWD
|
|
|
|
template<typename, typename = void>
|
|
struct ResultOfCore {};
|
|
template<typename F, typename ...A>
|
|
struct ResultOfCore<F(A...), decltype(void(rof_invoke(
|
|
detail::declval_in<F>(), detail::declval_in<A>()...)))> {
|
|
using type = decltype(rof_invoke(detail::declval_in<F>(),
|
|
detail::declval_in<A>()...));
|
|
};
|
|
|
|
template<typename T> struct ResultOfBase: ResultOfCore<T> {};
|
|
} /* namespace detail */
|
|
|
|
template<typename T>
|
|
using ResultOf = typename detail::ResultOfBase<T>::Type;
|
|
|
|
/* enable if */
|
|
|
|
namespace detail {
|
|
template<bool B, typename T = void> struct EnableIfBase {};
|
|
|
|
template<typename T> struct EnableIfBase<true, T> { using Type = T; };
|
|
}
|
|
|
|
template<bool B, typename T = void>
|
|
using EnableIf = typename detail::EnableIfBase<B, T>::Type;
|
|
|
|
/* decay */
|
|
|
|
namespace detail {
|
|
template<typename T>
|
|
struct DecayBase {
|
|
private:
|
|
using U = RemoveReference<T>;
|
|
public:
|
|
using Type = Conditional<IsArray<U>,
|
|
RemoveExtent<U> *,
|
|
Conditional<IsFunction<U>, AddPointer<U>, RemoveCv<U>>
|
|
>;
|
|
};
|
|
}
|
|
|
|
template<typename T>
|
|
using Decay = typename detail::DecayBase<T>::Type;
|
|
|
|
/* common type */
|
|
|
|
namespace detail {
|
|
template<typename ...T> struct CommonTypeBase;
|
|
|
|
template<typename T> struct CommonTypeBase<T> {
|
|
using Type = Decay<T>;
|
|
};
|
|
|
|
template<typename T, typename U> struct CommonTypeBase<T, U> {
|
|
using Type = Decay<decltype(true ? detail::declval_in<T>()
|
|
: detail::declval_in<U>())>;
|
|
};
|
|
|
|
template<typename T, typename U, typename ...V>
|
|
struct CommonTypeBase<T, U, V...> {
|
|
using Type = typename CommonTypeBase<
|
|
typename CommonTypeBase<T, U>::Type, V...
|
|
>::Type;
|
|
};
|
|
}
|
|
|
|
template<typename T, typename U, typename ...V>
|
|
using CommonType = typename detail::CommonTypeBase<T, U, V...>::Type;
|
|
|
|
/* aligned storage */
|
|
|
|
namespace detail {
|
|
template<Size N> struct AlignedTest {
|
|
union Type {
|
|
byte data[N];
|
|
MaxAlign align;
|
|
};
|
|
};
|
|
|
|
template<Size N, Size A> struct AlignedStorageBase {
|
|
struct Type {
|
|
alignas(A) byte data[N];
|
|
};
|
|
};
|
|
}
|
|
|
|
template<Size N, Size A
|
|
= alignof(typename detail::AlignedTest<N>::Type)
|
|
> using AlignedStorage = typename detail::AlignedStorageBase<N, A>::Type;
|
|
|
|
/* aligned union */
|
|
|
|
namespace detail {
|
|
template<Size ...N> constexpr Size AlignMax = 0;
|
|
template<Size N> constexpr Size AlignMax<N> = N;
|
|
|
|
template<Size N1, Size N2> constexpr Size AlignMax<N1, N2>
|
|
= (N1 > N2) ? N1 : N2;
|
|
|
|
template<Size N1, Size N2, Size ...N>
|
|
constexpr Size AlignMax<N1, N2, N...> = AlignMax<AlignMax<N1, N2>, N...>;
|
|
|
|
template<Size N, typename ...T> struct AlignedUnionBase {
|
|
static constexpr Size alignment_value
|
|
= AlignMax<alignof(T)...>;
|
|
|
|
struct type {
|
|
alignas(alignment_value) byte data[AlignMax<N, sizeof(T)...>];
|
|
};
|
|
};
|
|
} /* namespace detail */
|
|
|
|
template<Size N, typename ...T>
|
|
using AlignedUnion = typename detail::AlignedUnionBase<N, T...>::Type;
|
|
|
|
/* underlying type */
|
|
|
|
namespace detail {
|
|
/* gotta wrap, in a struct otherwise clang ICEs... */
|
|
template<typename T> struct UnderlyingTypeBase {
|
|
using Type = __underlying_type(T);
|
|
};
|
|
}
|
|
|
|
template<typename T>
|
|
using UnderlyingType = typename detail::UnderlyingTypeBase<T>::Type;
|
|
|
|
} /* namespace ostd */
|
|
|
|
#endif
|