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Diffstat (limited to 'src/google/protobuf/stubs/type_traits_unittest.cc')
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diff --git a/src/google/protobuf/stubs/type_traits_unittest.cc b/src/google/protobuf/stubs/type_traits_unittest.cc new file mode 100644 index 0000000..7a8cbfb --- /dev/null +++ b/src/google/protobuf/stubs/type_traits_unittest.cc @@ -0,0 +1,628 @@ +// Copyright (c) 2006, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// ---- +// Author: Matt Austern + +#include <google/protobuf/stubs/type_traits.h> + +#include <stdlib.h> // for exit() +#include <stdio.h> +#include <string> +#include <vector> + +#include <google/protobuf/testing/googletest.h> +#include <gtest/gtest.h> + +typedef int int32; +typedef long int64; + +using std::string; +using std::vector; +using std::pair; + + +// This assertion produces errors like "error: invalid use of +// incomplete type 'struct <unnamed>::AssertTypesEq<const int, int>'" +// when it fails. +template<typename T, typename U> struct AssertTypesEq; +template<typename T> struct AssertTypesEq<T, T> {}; +#define COMPILE_ASSERT_TYPES_EQ(T, U) static_cast<void>(AssertTypesEq<T, U>()) + +// A user-defined POD type. +struct A { + int n_; +}; + +// A user-defined non-POD type with a trivial copy constructor. +class B { + public: + explicit B(int n) : n_(n) { } + private: + int n_; +}; + +// Another user-defined non-POD type with a trivial copy constructor. +// We will explicitly declare C to have a trivial copy constructor +// by specializing has_trivial_copy. +class C { + public: + explicit C(int n) : n_(n) { } + private: + int n_; +}; + +namespace google { +namespace protobuf { +namespace internal { +template<> struct has_trivial_copy<C> : true_type { }; +} // namespace internal +} // namespace protobuf +} // namespace google + +// Another user-defined non-POD type with a trivial assignment operator. +// We will explicitly declare C to have a trivial assignment operator +// by specializing has_trivial_assign. +class D { + public: + explicit D(int n) : n_(n) { } + private: + int n_; +}; + +namespace google { +namespace protobuf { +namespace internal { +template<> struct has_trivial_assign<D> : true_type { }; +} // namespace internal +} // namespace protobuf +} // namespace google + +// Another user-defined non-POD type with a trivial constructor. +// We will explicitly declare E to have a trivial constructor +// by specializing has_trivial_constructor. +class E { + public: + int n_; +}; + +namespace google { +namespace protobuf { +namespace internal { +template<> struct has_trivial_constructor<E> : true_type { }; +} // namespace internal +} // namespace protobuf +} // namespace google + +// Another user-defined non-POD type with a trivial destructor. +// We will explicitly declare E to have a trivial destructor +// by specializing has_trivial_destructor. +class F { + public: + explicit F(int n) : n_(n) { } + private: + int n_; +}; + +namespace google { +namespace protobuf { +namespace internal { +template<> struct has_trivial_destructor<F> : true_type { }; +} // namespace internal +} // namespace protobuf +} // namespace google + +enum G {}; + +union H {}; + +class I { + public: + operator int() const; +}; + +class J { + private: + operator int() const; +}; + +namespace google { +namespace protobuf { +namespace internal { +namespace { + +// A base class and a derived class that inherits from it, used for +// testing conversion type traits. +class Base { + public: + virtual ~Base() { } +}; + +class Derived : public Base { +}; + +TEST(TypeTraitsTest, TestIsInteger) { + // Verify that is_integral is true for all integer types. + EXPECT_TRUE(is_integral<bool>::value); + EXPECT_TRUE(is_integral<char>::value); + EXPECT_TRUE(is_integral<unsigned char>::value); + EXPECT_TRUE(is_integral<signed char>::value); + EXPECT_TRUE(is_integral<wchar_t>::value); + EXPECT_TRUE(is_integral<int>::value); + EXPECT_TRUE(is_integral<unsigned int>::value); + EXPECT_TRUE(is_integral<short>::value); + EXPECT_TRUE(is_integral<unsigned short>::value); + EXPECT_TRUE(is_integral<long>::value); + EXPECT_TRUE(is_integral<unsigned long>::value); + + // Verify that is_integral is false for a few non-integer types. + EXPECT_FALSE(is_integral<void>::value); + EXPECT_FALSE(is_integral<float>::value); + EXPECT_FALSE(is_integral<string>::value); + EXPECT_FALSE(is_integral<int*>::value); + EXPECT_FALSE(is_integral<A>::value); + EXPECT_FALSE((is_integral<pair<int, int> >::value)); + + // Verify that cv-qualified integral types are still integral, and + // cv-qualified non-integral types are still non-integral. + EXPECT_TRUE(is_integral<const char>::value); + EXPECT_TRUE(is_integral<volatile bool>::value); + EXPECT_TRUE(is_integral<const volatile unsigned int>::value); + EXPECT_FALSE(is_integral<const float>::value); + EXPECT_FALSE(is_integral<int* volatile>::value); + EXPECT_FALSE(is_integral<const volatile string>::value); +} + +TEST(TypeTraitsTest, TestIsFloating) { + // Verify that is_floating_point is true for all floating-point types. + EXPECT_TRUE(is_floating_point<float>::value); + EXPECT_TRUE(is_floating_point<double>::value); + EXPECT_TRUE(is_floating_point<long double>::value); + + // Verify that is_floating_point is false for a few non-float types. + EXPECT_FALSE(is_floating_point<void>::value); + EXPECT_FALSE(is_floating_point<long>::value); + EXPECT_FALSE(is_floating_point<string>::value); + EXPECT_FALSE(is_floating_point<float*>::value); + EXPECT_FALSE(is_floating_point<A>::value); + EXPECT_FALSE((is_floating_point<pair<int, int> >::value)); + + // Verify that cv-qualified floating point types are still floating, and + // cv-qualified non-floating types are still non-floating. + EXPECT_TRUE(is_floating_point<const float>::value); + EXPECT_TRUE(is_floating_point<volatile double>::value); + EXPECT_TRUE(is_floating_point<const volatile long double>::value); + EXPECT_FALSE(is_floating_point<const int>::value); + EXPECT_FALSE(is_floating_point<volatile string>::value); + EXPECT_FALSE(is_floating_point<const volatile char>::value); +} + +TEST(TypeTraitsTest, TestIsPointer) { + // Verify that is_pointer is true for some pointer types. + EXPECT_TRUE(is_pointer<int*>::value); + EXPECT_TRUE(is_pointer<void*>::value); + EXPECT_TRUE(is_pointer<string*>::value); + EXPECT_TRUE(is_pointer<const void*>::value); + EXPECT_TRUE(is_pointer<volatile float* const*>::value); + + // Verify that is_pointer is false for some non-pointer types. + EXPECT_FALSE(is_pointer<void>::value); + EXPECT_FALSE(is_pointer<float&>::value); + EXPECT_FALSE(is_pointer<long>::value); + EXPECT_FALSE(is_pointer<vector<int*> >::value); + EXPECT_FALSE(is_pointer<int[5]>::value); + + // A function pointer is a pointer, but a function type, or a function + // reference type, is not. + EXPECT_TRUE(is_pointer<int (*)(int x)>::value); + EXPECT_FALSE(is_pointer<void(char x)>::value); + EXPECT_FALSE(is_pointer<double (&)(string x)>::value); + + // Verify that is_pointer<T> is true for some cv-qualified pointer types, + // and false for some cv-qualified non-pointer types. + EXPECT_TRUE(is_pointer<int* const>::value); + EXPECT_TRUE(is_pointer<const void* volatile>::value); + EXPECT_TRUE(is_pointer<char** const volatile>::value); + EXPECT_FALSE(is_pointer<const int>::value); + EXPECT_FALSE(is_pointer<volatile vector<int*> >::value); + EXPECT_FALSE(is_pointer<const volatile double>::value); +} + +TEST(TypeTraitsTest, TestIsEnum) { +// is_enum isn't supported on MSVC or gcc 3.x +#if !defined(_MSC_VER) && !(defined(__GNUC__) && __GNUC__ <= 3) + // Verify that is_enum is true for enum types. + EXPECT_TRUE(is_enum<G>::value); + EXPECT_TRUE(is_enum<const G>::value); + EXPECT_TRUE(is_enum<volatile G>::value); + EXPECT_TRUE(is_enum<const volatile G>::value); + + // Verify that is_enum is false for a few non-enum types. + EXPECT_FALSE(is_enum<void>::value); + EXPECT_FALSE(is_enum<G&>::value); + EXPECT_FALSE(is_enum<G[1]>::value); + EXPECT_FALSE(is_enum<const G[1]>::value); + EXPECT_FALSE(is_enum<G[]>::value); + EXPECT_FALSE(is_enum<int>::value); + EXPECT_FALSE(is_enum<float>::value); + EXPECT_FALSE(is_enum<A>::value); + EXPECT_FALSE(is_enum<A*>::value); + EXPECT_FALSE(is_enum<const A>::value); + EXPECT_FALSE(is_enum<H>::value); + EXPECT_FALSE(is_enum<I>::value); + EXPECT_FALSE(is_enum<J>::value); + EXPECT_FALSE(is_enum<void()>::value); + EXPECT_FALSE(is_enum<void(*)()>::value); + EXPECT_FALSE(is_enum<int A::*>::value); + EXPECT_FALSE(is_enum<void (A::*)()>::value); +#endif +} + +TEST(TypeTraitsTest, TestIsReference) { + // Verifies that is_reference is true for all reference types. + typedef float& RefFloat; + EXPECT_TRUE(is_reference<float&>::value); + EXPECT_TRUE(is_reference<const int&>::value); + EXPECT_TRUE(is_reference<const int*&>::value); + EXPECT_TRUE(is_reference<int (&)(bool)>::value); + EXPECT_TRUE(is_reference<RefFloat>::value); + EXPECT_TRUE(is_reference<const RefFloat>::value); + EXPECT_TRUE(is_reference<volatile RefFloat>::value); + EXPECT_TRUE(is_reference<const volatile RefFloat>::value); + + + // Verifies that is_reference is false for all non-reference types. + EXPECT_FALSE(is_reference<float>::value); + EXPECT_FALSE(is_reference<const float>::value); + EXPECT_FALSE(is_reference<volatile float>::value); + EXPECT_FALSE(is_reference<const volatile float>::value); + EXPECT_FALSE(is_reference<const int*>::value); + EXPECT_FALSE(is_reference<int()>::value); + EXPECT_FALSE(is_reference<void(*)(const char&)>::value); +} + +TEST(TypeTraitsTest, TestAddReference) { + COMPILE_ASSERT_TYPES_EQ(int&, add_reference<int>::type); + COMPILE_ASSERT_TYPES_EQ(const int&, add_reference<const int>::type); + COMPILE_ASSERT_TYPES_EQ(volatile int&, + add_reference<volatile int>::type); + COMPILE_ASSERT_TYPES_EQ(const volatile int&, + add_reference<const volatile int>::type); + COMPILE_ASSERT_TYPES_EQ(int&, add_reference<int&>::type); + COMPILE_ASSERT_TYPES_EQ(const int&, add_reference<const int&>::type); + COMPILE_ASSERT_TYPES_EQ(volatile int&, + add_reference<volatile int&>::type); + COMPILE_ASSERT_TYPES_EQ(const volatile int&, + add_reference<const volatile int&>::type); +} + +TEST(TypeTraitsTest, TestIsPod) { + // Verify that arithmetic types and pointers are marked as PODs. + EXPECT_TRUE(is_pod<bool>::value); + EXPECT_TRUE(is_pod<char>::value); + EXPECT_TRUE(is_pod<unsigned char>::value); + EXPECT_TRUE(is_pod<signed char>::value); + EXPECT_TRUE(is_pod<wchar_t>::value); + EXPECT_TRUE(is_pod<int>::value); + EXPECT_TRUE(is_pod<unsigned int>::value); + EXPECT_TRUE(is_pod<short>::value); + EXPECT_TRUE(is_pod<unsigned short>::value); + EXPECT_TRUE(is_pod<long>::value); + EXPECT_TRUE(is_pod<unsigned long>::value); + EXPECT_TRUE(is_pod<float>::value); + EXPECT_TRUE(is_pod<double>::value); + EXPECT_TRUE(is_pod<long double>::value); + EXPECT_TRUE(is_pod<string*>::value); + EXPECT_TRUE(is_pod<A*>::value); + EXPECT_TRUE(is_pod<const B*>::value); + EXPECT_TRUE(is_pod<C**>::value); + EXPECT_TRUE(is_pod<const int>::value); + EXPECT_TRUE(is_pod<char* volatile>::value); + EXPECT_TRUE(is_pod<const volatile double>::value); +#if !defined(_MSC_VER) && !(defined(__GNUC__) && __GNUC__ <= 3) + EXPECT_TRUE(is_pod<G>::value); + EXPECT_TRUE(is_pod<const G>::value); + EXPECT_TRUE(is_pod<volatile G>::value); + EXPECT_TRUE(is_pod<const volatile G>::value); +#endif + + // Verify that some non-POD types are not marked as PODs. + EXPECT_FALSE(is_pod<void>::value); + EXPECT_FALSE(is_pod<string>::value); + EXPECT_FALSE((is_pod<pair<int, int> >::value)); + EXPECT_FALSE(is_pod<A>::value); + EXPECT_FALSE(is_pod<B>::value); + EXPECT_FALSE(is_pod<C>::value); + EXPECT_FALSE(is_pod<const string>::value); + EXPECT_FALSE(is_pod<volatile A>::value); + EXPECT_FALSE(is_pod<const volatile B>::value); +} + +TEST(TypeTraitsTest, TestHasTrivialConstructor) { + // Verify that arithmetic types and pointers have trivial constructors. + EXPECT_TRUE(has_trivial_constructor<bool>::value); + EXPECT_TRUE(has_trivial_constructor<char>::value); + EXPECT_TRUE(has_trivial_constructor<unsigned char>::value); + EXPECT_TRUE(has_trivial_constructor<signed char>::value); + EXPECT_TRUE(has_trivial_constructor<wchar_t>::value); + EXPECT_TRUE(has_trivial_constructor<int>::value); + EXPECT_TRUE(has_trivial_constructor<unsigned int>::value); + EXPECT_TRUE(has_trivial_constructor<short>::value); + EXPECT_TRUE(has_trivial_constructor<unsigned short>::value); + EXPECT_TRUE(has_trivial_constructor<long>::value); + EXPECT_TRUE(has_trivial_constructor<unsigned long>::value); + EXPECT_TRUE(has_trivial_constructor<float>::value); + EXPECT_TRUE(has_trivial_constructor<double>::value); + EXPECT_TRUE(has_trivial_constructor<long double>::value); + EXPECT_TRUE(has_trivial_constructor<string*>::value); + EXPECT_TRUE(has_trivial_constructor<A*>::value); + EXPECT_TRUE(has_trivial_constructor<const B*>::value); + EXPECT_TRUE(has_trivial_constructor<C**>::value); + + // Verify that pairs and arrays of such types have trivial + // constructors. + typedef int int10[10]; + EXPECT_TRUE((has_trivial_constructor<pair<int, char*> >::value)); + EXPECT_TRUE(has_trivial_constructor<int10>::value); + + // Verify that pairs of types without trivial constructors + // are not marked as trivial. + EXPECT_FALSE((has_trivial_constructor<pair<int, string> >::value)); + EXPECT_FALSE((has_trivial_constructor<pair<string, int> >::value)); + + // Verify that types without trivial constructors are + // correctly marked as such. + EXPECT_FALSE(has_trivial_constructor<string>::value); + EXPECT_FALSE(has_trivial_constructor<vector<int> >::value); + + // Verify that E, which we have declared to have a trivial + // constructor, is correctly marked as such. + EXPECT_TRUE(has_trivial_constructor<E>::value); +} + +TEST(TypeTraitsTest, TestHasTrivialCopy) { + // Verify that arithmetic types and pointers have trivial copy + // constructors. + EXPECT_TRUE(has_trivial_copy<bool>::value); + EXPECT_TRUE(has_trivial_copy<char>::value); + EXPECT_TRUE(has_trivial_copy<unsigned char>::value); + EXPECT_TRUE(has_trivial_copy<signed char>::value); + EXPECT_TRUE(has_trivial_copy<wchar_t>::value); + EXPECT_TRUE(has_trivial_copy<int>::value); + EXPECT_TRUE(has_trivial_copy<unsigned int>::value); + EXPECT_TRUE(has_trivial_copy<short>::value); + EXPECT_TRUE(has_trivial_copy<unsigned short>::value); + EXPECT_TRUE(has_trivial_copy<long>::value); + EXPECT_TRUE(has_trivial_copy<unsigned long>::value); + EXPECT_TRUE(has_trivial_copy<float>::value); + EXPECT_TRUE(has_trivial_copy<double>::value); + EXPECT_TRUE(has_trivial_copy<long double>::value); + EXPECT_TRUE(has_trivial_copy<string*>::value); + EXPECT_TRUE(has_trivial_copy<A*>::value); + EXPECT_TRUE(has_trivial_copy<const B*>::value); + EXPECT_TRUE(has_trivial_copy<C**>::value); + + // Verify that pairs and arrays of such types have trivial + // copy constructors. + typedef int int10[10]; + EXPECT_TRUE((has_trivial_copy<pair<int, char*> >::value)); + EXPECT_TRUE(has_trivial_copy<int10>::value); + + // Verify that pairs of types without trivial copy constructors + // are not marked as trivial. + EXPECT_FALSE((has_trivial_copy<pair<int, string> >::value)); + EXPECT_FALSE((has_trivial_copy<pair<string, int> >::value)); + + // Verify that types without trivial copy constructors are + // correctly marked as such. + EXPECT_FALSE(has_trivial_copy<string>::value); + EXPECT_FALSE(has_trivial_copy<vector<int> >::value); + + // Verify that C, which we have declared to have a trivial + // copy constructor, is correctly marked as such. + EXPECT_TRUE(has_trivial_copy<C>::value); +} + +TEST(TypeTraitsTest, TestHasTrivialAssign) { + // Verify that arithmetic types and pointers have trivial assignment + // operators. + EXPECT_TRUE(has_trivial_assign<bool>::value); + EXPECT_TRUE(has_trivial_assign<char>::value); + EXPECT_TRUE(has_trivial_assign<unsigned char>::value); + EXPECT_TRUE(has_trivial_assign<signed char>::value); + EXPECT_TRUE(has_trivial_assign<wchar_t>::value); + EXPECT_TRUE(has_trivial_assign<int>::value); + EXPECT_TRUE(has_trivial_assign<unsigned int>::value); + EXPECT_TRUE(has_trivial_assign<short>::value); + EXPECT_TRUE(has_trivial_assign<unsigned short>::value); + EXPECT_TRUE(has_trivial_assign<long>::value); + EXPECT_TRUE(has_trivial_assign<unsigned long>::value); + EXPECT_TRUE(has_trivial_assign<float>::value); + EXPECT_TRUE(has_trivial_assign<double>::value); + EXPECT_TRUE(has_trivial_assign<long double>::value); + EXPECT_TRUE(has_trivial_assign<string*>::value); + EXPECT_TRUE(has_trivial_assign<A*>::value); + EXPECT_TRUE(has_trivial_assign<const B*>::value); + EXPECT_TRUE(has_trivial_assign<C**>::value); + + // Verify that pairs and arrays of such types have trivial + // assignment operators. + typedef int int10[10]; + EXPECT_TRUE((has_trivial_assign<pair<int, char*> >::value)); + EXPECT_TRUE(has_trivial_assign<int10>::value); + + // Verify that pairs of types without trivial assignment operators + // are not marked as trivial. + EXPECT_FALSE((has_trivial_assign<pair<int, string> >::value)); + EXPECT_FALSE((has_trivial_assign<pair<string, int> >::value)); + + // Verify that types without trivial assignment operators are + // correctly marked as such. + EXPECT_FALSE(has_trivial_assign<string>::value); + EXPECT_FALSE(has_trivial_assign<vector<int> >::value); + + // Verify that D, which we have declared to have a trivial + // assignment operator, is correctly marked as such. + EXPECT_TRUE(has_trivial_assign<D>::value); +} + +TEST(TypeTraitsTest, TestHasTrivialDestructor) { + // Verify that arithmetic types and pointers have trivial destructors. + EXPECT_TRUE(has_trivial_destructor<bool>::value); + EXPECT_TRUE(has_trivial_destructor<char>::value); + EXPECT_TRUE(has_trivial_destructor<unsigned char>::value); + EXPECT_TRUE(has_trivial_destructor<signed char>::value); + EXPECT_TRUE(has_trivial_destructor<wchar_t>::value); + EXPECT_TRUE(has_trivial_destructor<int>::value); + EXPECT_TRUE(has_trivial_destructor<unsigned int>::value); + EXPECT_TRUE(has_trivial_destructor<short>::value); + EXPECT_TRUE(has_trivial_destructor<unsigned short>::value); + EXPECT_TRUE(has_trivial_destructor<long>::value); + EXPECT_TRUE(has_trivial_destructor<unsigned long>::value); + EXPECT_TRUE(has_trivial_destructor<float>::value); + EXPECT_TRUE(has_trivial_destructor<double>::value); + EXPECT_TRUE(has_trivial_destructor<long double>::value); + EXPECT_TRUE(has_trivial_destructor<string*>::value); + EXPECT_TRUE(has_trivial_destructor<A*>::value); + EXPECT_TRUE(has_trivial_destructor<const B*>::value); + EXPECT_TRUE(has_trivial_destructor<C**>::value); + + // Verify that pairs and arrays of such types have trivial + // destructors. + typedef int int10[10]; + EXPECT_TRUE((has_trivial_destructor<pair<int, char*> >::value)); + EXPECT_TRUE(has_trivial_destructor<int10>::value); + + // Verify that pairs of types without trivial destructors + // are not marked as trivial. + EXPECT_FALSE((has_trivial_destructor<pair<int, string> >::value)); + EXPECT_FALSE((has_trivial_destructor<pair<string, int> >::value)); + + // Verify that types without trivial destructors are + // correctly marked as such. + EXPECT_FALSE(has_trivial_destructor<string>::value); + EXPECT_FALSE(has_trivial_destructor<vector<int> >::value); + + // Verify that F, which we have declared to have a trivial + // destructor, is correctly marked as such. + EXPECT_TRUE(has_trivial_destructor<F>::value); +} + +// Tests remove_pointer. +TEST(TypeTraitsTest, TestRemovePointer) { + COMPILE_ASSERT_TYPES_EQ(int, remove_pointer<int>::type); + COMPILE_ASSERT_TYPES_EQ(int, remove_pointer<int*>::type); + COMPILE_ASSERT_TYPES_EQ(const int, remove_pointer<const int*>::type); + COMPILE_ASSERT_TYPES_EQ(int, remove_pointer<int* const>::type); + COMPILE_ASSERT_TYPES_EQ(int, remove_pointer<int* volatile>::type); +} + +TEST(TypeTraitsTest, TestRemoveConst) { + COMPILE_ASSERT_TYPES_EQ(int, remove_const<int>::type); + COMPILE_ASSERT_TYPES_EQ(int, remove_const<const int>::type); + COMPILE_ASSERT_TYPES_EQ(int *, remove_const<int * const>::type); + // TR1 examples. + COMPILE_ASSERT_TYPES_EQ(const int *, remove_const<const int *>::type); + COMPILE_ASSERT_TYPES_EQ(volatile int, + remove_const<const volatile int>::type); +} + +TEST(TypeTraitsTest, TestRemoveVolatile) { + COMPILE_ASSERT_TYPES_EQ(int, remove_volatile<int>::type); + COMPILE_ASSERT_TYPES_EQ(int, remove_volatile<volatile int>::type); + COMPILE_ASSERT_TYPES_EQ(int *, remove_volatile<int * volatile>::type); + // TR1 examples. + COMPILE_ASSERT_TYPES_EQ(volatile int *, + remove_volatile<volatile int *>::type); + COMPILE_ASSERT_TYPES_EQ(const int, + remove_volatile<const volatile int>::type); +} + +TEST(TypeTraitsTest, TestRemoveCV) { + COMPILE_ASSERT_TYPES_EQ(int, remove_cv<int>::type); + COMPILE_ASSERT_TYPES_EQ(int, remove_cv<volatile int>::type); + COMPILE_ASSERT_TYPES_EQ(int, remove_cv<const int>::type); + COMPILE_ASSERT_TYPES_EQ(int *, remove_cv<int * const volatile>::type); + // TR1 examples. + COMPILE_ASSERT_TYPES_EQ(const volatile int *, + remove_cv<const volatile int *>::type); + COMPILE_ASSERT_TYPES_EQ(int, + remove_cv<const volatile int>::type); +} + +TEST(TypeTraitsTest, TestRemoveReference) { + COMPILE_ASSERT_TYPES_EQ(int, remove_reference<int>::type); + COMPILE_ASSERT_TYPES_EQ(int, remove_reference<int&>::type); + COMPILE_ASSERT_TYPES_EQ(const int, remove_reference<const int&>::type); + COMPILE_ASSERT_TYPES_EQ(int*, remove_reference<int * &>::type); +} + +TEST(TypeTraitsTest, TestIsSame) { + EXPECT_TRUE((is_same<int32, int32>::value)); + EXPECT_FALSE((is_same<int32, int64>::value)); + EXPECT_FALSE((is_same<int64, int32>::value)); + EXPECT_FALSE((is_same<int, const int>::value)); + + EXPECT_TRUE((is_same<void, void>::value)); + EXPECT_FALSE((is_same<void, int>::value)); + EXPECT_FALSE((is_same<int, void>::value)); + + EXPECT_TRUE((is_same<int*, int*>::value)); + EXPECT_TRUE((is_same<void*, void*>::value)); + EXPECT_FALSE((is_same<int*, void*>::value)); + EXPECT_FALSE((is_same<void*, int*>::value)); + EXPECT_FALSE((is_same<void*, const void*>::value)); + EXPECT_FALSE((is_same<void*, void* const>::value)); + + EXPECT_TRUE((is_same<Base*, Base*>::value)); + EXPECT_TRUE((is_same<Derived*, Derived*>::value)); + EXPECT_FALSE((is_same<Base*, Derived*>::value)); + EXPECT_FALSE((is_same<Derived*, Base*>::value)); +} + +TEST(TypeTraitsTest, TestConvertible) { +#if !defined(_MSC_VER) && !(defined(__GNUC__) && __GNUC__ <= 3) + EXPECT_TRUE((is_convertible<int, int>::value)); + EXPECT_TRUE((is_convertible<int, long>::value)); + EXPECT_TRUE((is_convertible<long, int>::value)); + + EXPECT_TRUE((is_convertible<int*, void*>::value)); + EXPECT_FALSE((is_convertible<void*, int*>::value)); + + EXPECT_TRUE((is_convertible<Derived*, Base*>::value)); + EXPECT_FALSE((is_convertible<Base*, Derived*>::value)); + EXPECT_TRUE((is_convertible<Derived*, const Base*>::value)); + EXPECT_FALSE((is_convertible<const Derived*, Base*>::value)); +#endif +} + +} // anonymous namespace +} // namespace internal +} // namespace protobuf +} // namespace google |