The Tor Browser: mfbt/tests/TestTypeTraits.cpp@925c144e1f1f (annotated)

mfbt/tests/TestTypeTraits.cpp@925c144e1f1f (annotated)

mfbt/tests/TestTypeTraits.cpp

Fri, 16 Jan 2015 18:13:44 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Fri, 16 Jan 2015 18:13:44 +0100
branch: TOR_BUG_9701
changeset 14: 925c144e1f1f
permissions: -rw-r--r--

Integrate suggestion from review to improve consistency with existing code.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "mozilla/Assertions.h"
 #include "mozilla/TypeTraits.h"
 using mozilla::IsArray;
 using mozilla::IsBaseOf;
 using mozilla::IsClass;
 using mozilla::IsConvertible;
 using mozilla::IsEmpty;
 using mozilla::IsLvalueReference;
 using mozilla::IsReference;
 using mozilla::IsRvalueReference;
 using mozilla::IsSame;
 using mozilla::IsSigned;
 using mozilla::IsUnsigned;
 using mozilla::MakeSigned;
 using mozilla::MakeUnsigned;
 static_assert(!IsArray<bool>::value, "bool not an array");
 static_assert(IsArray<bool[]>::value, "bool[] is an array");
 static_assert(IsArray<bool[5]>::value, "bool[5] is an array");
 static_assert(!IsLvalueReference<bool>::value, "bool not an lvalue reference");
 static_assert(!IsLvalueReference<bool*>::value, "bool* not an lvalue reference");
 static_assert(IsLvalueReference<bool&>::value, "bool& is an lvalue reference");
 static_assert(!IsLvalueReference<bool&&>::value, "bool&& not an lvalue reference");
 static_assert(!IsLvalueReference<void>::value, "void not an lvalue reference");
 static_assert(!IsLvalueReference<void*>::value, "void* not an lvalue reference");
 static_assert(!IsLvalueReference<int>::value, "int not an lvalue reference");
 static_assert(!IsLvalueReference<int*>::value, "int* not an lvalue reference");
 static_assert(IsLvalueReference<int&>::value, "int& is an lvalue reference");
 static_assert(!IsLvalueReference<int&&>::value, "int&& not an lvalue reference");
 static_assert(!IsRvalueReference<bool>::value, "bool not an rvalue reference");
 static_assert(!IsRvalueReference<bool*>::value, "bool* not an rvalue reference");
 static_assert(!IsRvalueReference<bool&>::value, "bool& not an rvalue reference");
 static_assert(IsRvalueReference<bool&&>::value, "bool&& is an rvalue reference");
 static_assert(!IsRvalueReference<void>::value, "void not an rvalue reference");
 static_assert(!IsRvalueReference<void*>::value, "void* not an rvalue reference");
 static_assert(!IsRvalueReference<int>::value, "int not an rvalue reference");
 static_assert(!IsRvalueReference<int*>::value, "int* not an rvalue reference");
 static_assert(!IsRvalueReference<int&>::value, "int& not an rvalue reference");
 static_assert(IsRvalueReference<int&&>::value, "int&& is an rvalue reference");
 static_assert(!IsReference<bool>::value, "bool not a reference");
 static_assert(!IsReference<bool*>::value, "bool* not a reference");
 static_assert(IsReference<bool&>::value, "bool& is a reference");
 static_assert(IsReference<bool&&>::value, "bool&& is a reference");
 static_assert(!IsReference<void>::value, "void not a reference");
 static_assert(!IsReference<void*>::value, "void* not a reference");
 static_assert(!IsReference<int>::value, "int not a reference");
 static_assert(!IsReference<int*>::value, "int* not a reference");
 static_assert(IsReference<int&>::value, "int& is a reference");
 static_assert(IsReference<int&&>::value, "int&& is a reference");
 struct S1 {};
 union U1 { int x; };
 static_assert(!IsClass<int>::value, "int isn't a class");
 static_assert(IsClass<const S1>::value, "S is a class");
 static_assert(!IsClass<U1>::value, "U isn't a class");
 static_assert(!mozilla::IsEmpty<int>::value, "not a class => not empty");
 static_assert(!mozilla::IsEmpty<bool[5]>::value, "not a class => not empty");
 static_assert(!mozilla::IsEmpty<U1>::value, "not a class => not empty");
 struct E1 {};
 struct E2 { int : 0; };
 struct E3 : E1 {};
 struct E4 : E2 {};
 static_assert(IsEmpty<const volatile S1>::value, "S should be empty");
 static_assert(mozilla::IsEmpty<E1>::value &&
               mozilla::IsEmpty<E2>::value &&
               mozilla::IsEmpty<E3>::value &&
               mozilla::IsEmpty<E4>::value,
               "all empty");
 union U2 { E1 e1; };
 static_assert(!mozilla::IsEmpty<U2>::value, "not a class => not empty");
 struct NE1 { int x; };
 struct NE2 : virtual E1 {};
 struct NE3 : E2 { virtual ~NE3() {} };
 struct NE4 { virtual void f() {} };
 static_assert(!mozilla::IsEmpty<NE1>::value &&
               !mozilla::IsEmpty<NE2>::value &&
               !mozilla::IsEmpty<NE3>::value &&
               !mozilla::IsEmpty<NE4>::value,
               "all empty");
 static_assert(!IsSigned<bool>::value, "bool shouldn't be signed");
 static_assert(IsUnsigned<bool>::value, "bool should be unsigned");
 static_assert(!IsSigned<const bool>::value, "const bool shouldn't be signed");
 static_assert(IsUnsigned<const bool>::value, "const bool should be unsigned");
 static_assert(!IsSigned<volatile bool>::value, "volatile bool shouldn't be signed");
 static_assert(IsUnsigned<volatile bool>::value, "volatile bool should be unsigned");
 static_assert(!IsSigned<unsigned char>::value, "unsigned char shouldn't be signed");
 static_assert(IsUnsigned<unsigned char>::value, "unsigned char should be unsigned");
 static_assert(IsSigned<signed char>::value, "signed char should be signed");
 static_assert(!IsUnsigned<signed char>::value, "signed char shouldn't be unsigned");
 static_assert(!IsSigned<unsigned short>::value, "unsigned short shouldn't be signed");
 static_assert(IsUnsigned<unsigned short>::value, "unsigned short should be unsigned");
 static_assert(IsSigned<short>::value, "short should be signed");
 static_assert(!IsUnsigned<short>::value, "short shouldn't be unsigned");
 static_assert(!IsSigned<unsigned int>::value, "unsigned int shouldn't be signed");
 static_assert(IsUnsigned<unsigned int>::value, "unsigned int should be unsigned");
 static_assert(IsSigned<int>::value, "int should be signed");
 static_assert(!IsUnsigned<int>::value, "int shouldn't be unsigned");
 static_assert(!IsSigned<unsigned long>::value, "unsigned long shouldn't be signed");
 static_assert(IsUnsigned<unsigned long>::value, "unsigned long should be unsigned");
 static_assert(IsSigned<long>::value, "long should be signed");
 static_assert(!IsUnsigned<long>::value, "long shouldn't be unsigned");
 static_assert(IsSigned<float>::value, "float should be signed");
 static_assert(!IsUnsigned<float>::value, "float shouldn't be unsigned");
 static_assert(IsSigned<const float>::value, "const float should be signed");
 static_assert(!IsUnsigned<const float>::value, "const float shouldn't be unsigned");
 static_assert(IsSigned<double>::value, "double should be signed");
 static_assert(!IsUnsigned<double>::value, "double shouldn't be unsigned");
 static_assert(IsSigned<volatile double>::value, "volatile double should be signed");
 static_assert(!IsUnsigned<volatile double>::value, "volatile double shouldn't be unsigned");
 static_assert(IsSigned<long double>::value, "long double should be signed");
 static_assert(!IsUnsigned<long double>::value, "long double shouldn't be unsigned");
 static_assert(IsSigned<const volatile long double>::value,
               "const volatile long double should be signed");
 static_assert(!IsUnsigned<const volatile long double>::value,
               "const volatile long double shouldn't be unsigned");
 namespace CPlusPlus11IsBaseOf {
 // Adapted from C++11 § 20.9.6.
 struct B {};
 struct B1 : B {};
 struct B2 : B {};
 struct D : private B1, private B2 {};
 static void
 StandardIsBaseOfTests()
 {
   static_assert((IsBaseOf<B, D>::value) == true, "IsBaseOf fails on diamond");
   static_assert((IsBaseOf<const B, D>::value) == true, "IsBaseOf fails on diamond plus constness change");
   static_assert((IsBaseOf<B, const D>::value) == true, "IsBaseOf fails on diamond plus constness change");
   static_assert((IsBaseOf<B, const B>::value) == true, "IsBaseOf fails on constness change");
   static_assert((IsBaseOf<D, B>::value) == false, "IsBaseOf got the direction of inheritance wrong");
   static_assert((IsBaseOf<B&, D&>::value) == false, "IsBaseOf should return false on references");
   static_assert((IsBaseOf<B[3], D[3]>::value) == false, "IsBaseOf should return false on arrays");
   // We fail at the following test.  To fix it, we need to specialize IsBaseOf
   // for all built-in types.
   // static_assert((IsBaseOf<int, int>::value) == false);
 }
 } /* namespace CPlusPlus11IsBaseOf */
 class A { };
 class B : public A { };
 class C : private A { };
 class D { };
 class E : public A { };
 class F : public B, public E { };
 static void
 TestIsBaseOf()
 {
   static_assert((IsBaseOf<A, B>::value),
              "A is a base of B");
   static_assert((!IsBaseOf<B, A>::value),
              "B is not a base of A");
   static_assert((IsBaseOf<A, C>::value),
              "A is a base of C");
   static_assert((!IsBaseOf<C, A>::value),
              "C is not a base of A");
   static_assert((IsBaseOf<A, F>::value),
              "A is a base of F");
   static_assert((!IsBaseOf<F, A>::value),
              "F is not a base of A");
   static_assert((!IsBaseOf<A, D>::value),
              "A is not a base of D");
   static_assert((!IsBaseOf<D, A>::value),
              "D is not a base of A");
   static_assert((IsBaseOf<B, B>::value),
              "B is the same as B (and therefore, a base of B)");
 }
 static void
 TestIsConvertible()
 {
   // Pointer type convertibility
   static_assert((IsConvertible<A*, A*>::value),
              "A* should convert to A*");
   static_assert((IsConvertible<B*, A*>::value),
              "B* should convert to A*");
   static_assert((!IsConvertible<A*, B*>::value),
              "A* shouldn't convert to B*");
   static_assert((!IsConvertible<A*, C*>::value),
              "A* shouldn't convert to C*");
   static_assert((!IsConvertible<A*, D*>::value),
              "A* shouldn't convert to unrelated D*");
   static_assert((!IsConvertible<D*, A*>::value),
              "D* shouldn't convert to unrelated A*");
   // Instance type convertibility
   static_assert((IsConvertible<A, A>::value),
              "A is A");
   static_assert((IsConvertible<B, A>::value),
              "B converts to A");
   static_assert((!IsConvertible<D, A>::value),
              "D and A are unrelated");
   static_assert((!IsConvertible<A, D>::value),
              "A and D are unrelated");
   // These cases seem to require C++11 support to properly implement them, so
   // for now just disable them.
   //static_assert((!IsConvertible<C*, A*>::value),
   //           "C* shouldn't convert to A* (private inheritance)");
   //static_assert((!IsConvertible<C, A>::value),
   //           "C doesn't convert to A (private inheritance)");
 }
 static_assert(IsSame<MakeSigned<const unsigned char>::Type, const signed char>::value,
               "const unsigned char won't signify correctly");
 static_assert(IsSame<MakeSigned<volatile unsigned short>::Type, volatile signed short>::value,
               "volatile unsigned short won't signify correctly");
 static_assert(IsSame<MakeSigned<const volatile unsigned int>::Type, const volatile signed int>::value,
               "const volatile unsigned int won't signify correctly");
 static_assert(IsSame<MakeSigned<unsigned long>::Type, signed long>::value,
               "unsigned long won't signify correctly");
 static_assert(IsSame<MakeSigned<const signed char>::Type, const signed char>::value,
               "const signed char won't signify correctly");
 static_assert(IsSame<MakeSigned<volatile signed short>::Type, volatile signed short>::value,
               "volatile signed short won't signify correctly");
 static_assert(IsSame<MakeSigned<const volatile signed int>::Type, const volatile signed int>::value,
               "const volatile signed int won't signify correctly");
 static_assert(IsSame<MakeSigned<signed long>::Type, signed long>::value,
               "signed long won't signify correctly");
 static_assert(IsSame<MakeSigned<char>::Type, signed char>::value,
               "char won't signify correctly");
 static_assert(IsSame<MakeSigned<volatile char>::Type, volatile signed char>::value,
               "volatile char won't signify correctly");
 static_assert(IsSame<MakeSigned<const char>::Type, const signed char>::value,
               "const char won't signify correctly");
 static_assert(IsSame<MakeUnsigned<const signed char>::Type, const unsigned char>::value,
               "const signed char won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<volatile signed short>::Type, volatile unsigned short>::value,
               "volatile signed short won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<const volatile signed int>::Type, const volatile unsigned int>::value,
               "const volatile signed int won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<signed long>::Type, unsigned long>::value,
               "signed long won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<const unsigned char>::Type, const unsigned char>::value,
               "const unsigned char won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<volatile unsigned short>::Type, volatile unsigned short>::value,
               "volatile unsigned short won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<const volatile unsigned int>::Type, const volatile unsigned int>::value,
               "const volatile unsigned int won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<unsigned long>::Type, unsigned long>::value,
               "signed long won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<char>::Type, unsigned char>::value,
               "char won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<volatile char>::Type, volatile unsigned char>::value,
               "volatile char won't unsignify correctly");
 static_assert(IsSame<MakeUnsigned<const char>::Type, const unsigned char>::value,
               "const char won't unsignify correctly");
 int
 main()
 {
   CPlusPlus11IsBaseOf::StandardIsBaseOfTests();
   TestIsBaseOf();
   TestIsConvertible();
 }

The Tor Browser / annotate

mfbt/tests/TestTypeTraits.cpp@925c144e1f1f (annotated)

mfbt/tests/TestTypeTraits.cpp