| /* |
| * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. |
| * Copyright (C) 2009, 2010 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "TypeTraits.h" |
| |
| #include "Assertions.h" |
| #include "Noncopyable.h" |
| |
| namespace WTF { |
| |
| static_assert(IsInteger<bool>::value, "bool should be an integer"); |
| static_assert(IsInteger<char>::value, "char should be an integer"); |
| static_assert(IsInteger<signed char>::value, "signed char should be an integer"); |
| static_assert(IsInteger<unsigned char>::value, "unsigned char should be an integer"); |
| static_assert(IsInteger<short>::value, "short should be an integer"); |
| static_assert(IsInteger<unsigned short>::value, "unsigned short should be an integer"); |
| static_assert(IsInteger<int>::value, "int should be an integer"); |
| static_assert(IsInteger<unsigned>::value, "unsigned int should be an integer"); |
| static_assert(IsInteger<long>::value, "long should be an integer"); |
| static_assert(IsInteger<unsigned long>::value, "unsigned long should be an integer"); |
| static_assert(IsInteger<long long>::value, "long long should be an integer"); |
| static_assert(IsInteger<unsigned long long>::value, "unsigned long long should be an integer"); |
| #if !COMPILER(MSVC) || defined(_NATIVE_WCHAR_T_DEFINED) |
| static_assert(IsInteger<wchar_t>::value, "wchar_t should be an integer"); |
| #endif |
| static_assert(!IsInteger<char*>::value, "char pointer should not be an integer"); |
| static_assert(!IsInteger<const char*>::value, "const char pointer should not be an integer"); |
| static_assert(!IsInteger<volatile char*>::value, "volatile char pointer should not be an integer"); |
| static_assert(!IsInteger<double>::value, "double should not be an integer"); |
| static_assert(!IsInteger<float>::value, "float should not be an integer"); |
| |
| static_assert(IsFloatingPoint<float>::value, "float should be floating point"); |
| static_assert(IsFloatingPoint<double>::value, "double should be floating point"); |
| static_assert(IsFloatingPoint<long double>::value, "long double should be floating point"); |
| static_assert(!IsFloatingPoint<int>::value, "int should not be floating point"); |
| |
| static_assert(IsPointer<void*>::value, "void* should be a pointer"); |
| static_assert(IsPointer<char*>::value, "char* should be a pointer"); |
| static_assert(IsPointer<const char*>::value, "const char* should be a pointer"); |
| static_assert(!IsPointer<char>::value, "char should not be a pointer"); |
| static_assert(!IsPointer<int>::value, "int should not be a pointer"); |
| static_assert(!IsPointer<long>::value, "long should not be a pointer"); |
| |
| enum TestEnum { TestEnumValue }; |
| static_assert(IsEnum<TestEnum>::value, "enum should be an enumerated type"); |
| static_assert(!IsEnum<int>::value, "int should not be an enumerated type"); |
| static_assert(!IsEnum<TestEnum*>::value, "enum* should not be an enumerated type"); |
| |
| static_assert(IsScalar<TestEnum>::value, "enum should be scalar"); |
| static_assert(IsScalar<int>::value, "int should be scalar"); |
| static_assert(IsScalar<TestEnum*>::value, "enum* should be scalar"); |
| static_assert(IsScalar<double>::value, "double should be scalar"); |
| |
| static_assert(IsPod<bool>::value, "bool should be a POD"); |
| static_assert(IsPod<char>::value, "char should be a POD"); |
| static_assert(IsPod<signed char>::value, "signed char should be a POD"); |
| static_assert(IsPod<unsigned char>::value, "unsigned char should be a POD"); |
| static_assert(IsPod<short>::value, "short should be a POD"); |
| static_assert(IsPod<unsigned short>::value, "unsigned short should be a POD"); |
| static_assert(IsPod<int>::value, "int should be a POD"); |
| static_assert(IsPod<unsigned>::value, "unsigned int should be a POD"); |
| static_assert(IsPod<long>::value, "long should be a POD"); |
| static_assert(IsPod<unsigned long>::value, "unsigned long should be a POD"); |
| static_assert(IsPod<long long>::value, "long long should be a POD"); |
| static_assert(IsPod<unsigned long long>::value, "unsigned long long should be a POD"); |
| #if !COMPILER(MSVC) || defined(_NATIVE_WCHAR_T_DEFINED) |
| static_assert(IsPod<wchar_t>::value, "wchar_t should be a POD"); |
| #endif |
| static_assert(IsPod<char*>::value, "char* should be a POD"); |
| static_assert(IsPod<const char*>::value, "const char* should be a POD"); |
| static_assert(IsPod<volatile char*>::value, "volatile char* should be a POD"); |
| static_assert(IsPod<double>::value, "double should be a POD"); |
| static_assert(IsPod<long double>::value, "long double should be a POD"); |
| static_assert(IsPod<float>::value, "float should be a POD"); |
| struct VirtualClass { |
| virtual void A() { } |
| }; |
| static_assert(!IsTriviallyMoveAssignable<VirtualClass>::value, "VirtualClass should not be trivially move assignable"); |
| static_assert(!IsScalar<VirtualClass>::value, "classes should not be scalar"); |
| static_assert(IsScalar<VirtualClass*>::value, "pointers to classes should be scalar"); |
| |
| struct DestructorClass { |
| ~DestructorClass() { } |
| }; |
| static_assert(IsTriviallyMoveAssignable<DestructorClass>::value, "DestructorClass should be trivially move assignable"); |
| static_assert(IsTriviallyCopyAssignable<DestructorClass>::value, "DestructorClass should be trivially copy assignable"); |
| static_assert(IsTriviallyDefaultConstructible<DestructorClass>::value, "DestructorClass should have a trivial default constructor"); |
| |
| struct MixedPrivate { |
| int M2() { return m2; } |
| int m1; |
| private: |
| int m2; |
| }; |
| static_assert(IsTriviallyMoveAssignable<MixedPrivate>::value, "MixedPrivate should be trivially move assignable"); |
| static_assert(IsTriviallyCopyAssignable<MixedPrivate>::value, "MixedPrivate should be trivially copy assignable"); |
| static_assert(IsTriviallyDefaultConstructible<MixedPrivate>::value, "MixedPrivate should have a trivial default constructor"); |
| struct JustPrivate { |
| int M2() { return m2; } |
| private: |
| int m2; |
| }; |
| static_assert(IsTriviallyMoveAssignable<JustPrivate>::value, "JustPrivate should be trivially move assignable"); |
| static_assert(IsTriviallyCopyAssignable<JustPrivate>::value, "JustPrivate should be trivially copy assignable"); |
| static_assert(IsTriviallyDefaultConstructible<JustPrivate>::value, "JustPrivate should have a trivial default constructor"); |
| struct JustPublic { |
| int m2; |
| }; |
| static_assert(IsTriviallyMoveAssignable<JustPublic>::value, "JustPublic should be trivially move assignable"); |
| static_assert(IsTriviallyCopyAssignable<JustPublic>::value, "JustPublic should be trivially copy assignable"); |
| static_assert(IsTriviallyDefaultConstructible<JustPublic>::value, "JustPublic should have a trivial default constructor"); |
| struct NestedInherited : public JustPublic, JustPrivate { |
| float m3; |
| }; |
| static_assert(IsTriviallyMoveAssignable<NestedInherited>::value, "NestedInherited should be trivially move assignable"); |
| static_assert(IsTriviallyCopyAssignable<NestedInherited>::value, "NestedInherited should be trivially copy assignable"); |
| static_assert(IsTriviallyDefaultConstructible<NestedInherited>::value, "NestedInherited should have a trivial default constructor"); |
| struct NestedOwned { |
| JustPublic m1; |
| JustPrivate m2; |
| float m3; |
| }; |
| |
| static_assert(IsTriviallyMoveAssignable<NestedOwned>::value, "NestedOwned should be trivially move assignable"); |
| static_assert(IsTriviallyCopyAssignable<NestedOwned>::value, "NestedOwned should be trivially copy assignable"); |
| static_assert(IsTriviallyDefaultConstructible<NestedOwned>::value, "NestedOwned should have a trivial default constructor"); |
| |
| class NonCopyableClass { |
| WTF_MAKE_NONCOPYABLE(NonCopyableClass); |
| }; |
| #if 0 // Compilers don't get this "right" yet if using = delete. |
| static_assert(!IsTriviallyMoveAssignable<NonCopyableClass>::value, "NonCopyableClass should not be trivially move assignable"); |
| static_assert(!IsTriviallyCopyAssignable<NonCopyableClass>::value, "NonCopyableClass should not be trivially copy assignable"); |
| static_assert(IsTriviallyDefaultConstructible<NonCopyableClass>::value, "NonCopyableClass should have a trivial default constructor"); |
| #endif // 0 |
| |
| enum IsConvertibleToIntegerCheck { }; |
| static_assert(IsConvertibleToInteger<IsConvertibleToIntegerCheck>::value, "enum should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<bool>::value, "bool should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<char>::value, "char should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<signed char>::value, "signed char should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<unsigned char>::value, "unsigned char should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<short>::value, "short should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<unsigned short>::value, "unsigned short should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<int>::value, "int should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<unsigned>::value, "unsigned int should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<long>::value, "long should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<unsigned long>::value, "unsigned long should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<long long>::value, "long long should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<unsigned long long>::value, "unsigned long long should be convertible to integer"); |
| #if !COMPILER(MSVC) || defined(_NATIVE_WCHAR_T_DEFINED) |
| static_assert(IsConvertibleToInteger<wchar_t>::value, "whcar_t should be convertible to integer"); |
| #endif |
| static_assert(IsConvertibleToInteger<double>::value, "double should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<long double>::value, "long double should be convertible to integer"); |
| static_assert(IsConvertibleToInteger<float>::value, "float should be convertible to integer"); |
| static_assert(!IsConvertibleToInteger<char*>::value, "char* should not be convertible to integer"); |
| static_assert(!IsConvertibleToInteger<const char*>::value, "const char* should not be convertible to integer"); |
| static_assert(!IsConvertibleToInteger<volatile char*>::value, "volatile char* should not be convertible to integer"); |
| static_assert(!IsConvertibleToInteger<IsConvertibleToInteger<bool>>::value, "struct should not be convertible to integer"); |
| |
| static_assert((IsPointerConvertible<int, int>::Value), "pointers to the same type should be convertible"); |
| static_assert((!IsPointerConvertible<int, unsigned>::Value), "int pointers should not be convertible to unsigned pointers"); |
| static_assert((IsPointerConvertible<int, const int>::Value), "int pointers should be convertible to const int pointers"); |
| static_assert((!IsPointerConvertible<const int, int>::Value), "const int* should not be convertible to int*"); |
| static_assert((IsPointerConvertible<int, volatile int>::Value), "int* should be convertible to volatile int*"); |
| |
| static_assert((IsSameType<bool, bool>::value), "bool should be the same type as itself"); |
| static_assert((IsSameType<int*, int*>::value), "int* should be the same type as itself"); |
| static_assert((!IsSameType<int, int*>::value), "int should not be the same type as int*"); |
| static_assert((!IsSameType<bool, const bool>::value), "T should not be the same type as const T"); |
| static_assert((!IsSameType<bool, volatile bool>::value), "T should not be the same type as volatile T"); |
| |
| template <typename T> |
| class TestBaseClass { |
| }; |
| |
| class TestDerivedClass : public TestBaseClass<int> { |
| }; |
| |
| static_assert((IsSubclass<TestDerivedClass, TestBaseClass<int>>::value), "Derived class should be a subclass of its base"); |
| static_assert((!IsSubclass<TestBaseClass<int>, TestDerivedClass>::value), "Base class should not be a sublass of a derived class"); |
| static_assert((IsSubclassOfTemplate<TestDerivedClass, TestBaseClass>::value), "Derived class should be a subclass of template from its base"); |
| static_assert((IsSameType<RemoveTemplate<TestBaseClass<int>, TestBaseClass>::Type, int>::value), "RemoveTemplate should remove the template typename from the type"); |
| static_assert((IsSameType<RemoveTemplate<int, TestBaseClass>::Type, int>::value), "RemoveTemplate should not alter non-template types"); |
| static_assert((IsPointerConvertible<TestDerivedClass, TestBaseClass<int>>::Value), "Derived class pointers should be convertible to base class pointers"); |
| static_assert((!IsPointerConvertible<TestBaseClass<int>, TestDerivedClass>::Value), "Base class pointers should not be convertible to derived class pointers"); |
| |
| static_assert((IsSameType<bool, RemoveConst<const bool>::Type>::value), "RemoveConst should produce the corresponding non-const type"); |
| static_assert((!IsSameType<bool, RemoveConst<volatile bool>::Type>::value), "RemoveConst of volatile types should not remove volatility"); |
| |
| static_assert((IsSameType<bool, RemoveVolatile<bool>::Type>::value), "RemoveVolatile should not modify the type of non-volatile types"); |
| static_assert((!IsSameType<bool, RemoveVolatile<const bool>::Type>::value), "RemoveVolatile should not remove const-ness"); |
| static_assert((IsSameType<bool, RemoveVolatile<volatile bool>::Type>::value), "RemoveVolatile should produce the equivalent non-volatile type"); |
| |
| static_assert((IsSameType<bool, RemoveConstVolatile<bool>::Type>::value), "RemoveConstVolatile should not modify the type of non-const non-volatile types"); |
| static_assert((IsSameType<bool, RemoveConstVolatile<const bool>::Type>::value), "RemoveConstVolatile should remove const-ness"); |
| static_assert((IsSameType<bool, RemoveConstVolatile<volatile bool>::Type>::value), "RemoveConstVolatile should remove volatility"); |
| static_assert((IsSameType<bool, RemoveConstVolatile<const volatile bool>::Type>::value), "RemoveConstVolatile should remove both constness and volatility"); |
| |
| static_assert((IsSameType<int, RemovePointer<int>::Type>::value), "RemovePointer should not modify non-pointer types"); |
| static_assert((IsSameType<int, RemovePointer<int*>::Type>::value), "RemovePointer should produce the corresponding non-pointer type"); |
| static_assert((!IsSameType<int, RemovePointer<int**>::Type>::value), "RemovePointer should only remove one pointer level"); |
| |
| static_assert((IsSameType<int, RemoveReference<int>::Type>::value), "RemoveReference should not modify non-reference types"); |
| static_assert((IsSameType<int, RemoveReference<int&>::Type>::value), "RemoveReference should produce the corresponding non-reference type"); |
| static_assert((IsSameType<int, RemoveReference<int&&>::Type>::value), "RemoveReference should produce the corresponding non-reference type"); |
| |
| |
| typedef int IntArray[]; |
| typedef int IntArraySized[4]; |
| |
| static_assert((IsArray<IntArray>::value), "IsArray should recognize arrays"); |
| static_assert((IsArray<IntArraySized>::value), "IsArray should recognize sized arrays"); |
| |
| static_assert((IsSameType<int, RemoveExtent<IntArray>::Type>::value), "RemoveExtent should return the array element type of an array"); |
| static_assert((IsSameType<int, RemoveExtent<IntArraySized>::Type>::value), "RemoveExtent should return the array element type of a sized array"); |
| |
| } // namespace WTF |