/*
* Copyright (c) 2020-2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/TypeList.h>
#define STATIC_EXPECT_EQ(lhs, rhs) \
static_assert(IsSame<lhs, rhs>, "");
#define STATIC_EXPECT_FALSE(Expression) \
static_assert(!Expression, "");
#define STATIC_EXPECT_TRUE(Expression) \
static_assert(Expression, "");
#define EXPECT_TRAIT_TRUE(trait, ...) \
for_each_type<TypeList<__VA_ARGS__>>([]<typename T>(TypeWrapper<T>) { \
STATIC_EXPECT_TRUE(trait<T>); \
})
#define EXPECT_TRAIT_FALSE(trait, ...) \
for_each_type<TypeList<__VA_ARGS__>>([]<typename T>(TypeWrapper<T>) { \
STATIC_EXPECT_FALSE(trait<T>); \
})
#define EXPECT_EQ_WITH_TRAIT(trait, ListA, ListB) \
for_each_type_zipped<ListA, ListB>([]<typename A, typename B>(TypeWrapper<A>, TypeWrapper<B>) { \
STATIC_EXPECT_EQ(trait<A>, B); \
})
#define EXPECT_VARIADIC_TRAIT_TRUE(trait, ...) \
static_assert(trait<__VA_ARGS__>)
#define EXPECT_VARIADIC_TRAIT_FALSE(trait, ...) \
static_assert(!trait<__VA_ARGS__>)
enum class Enummer : u8 {
Dummy
};
TEST_CASE(FundamentalTypeClassification)
{
EXPECT_TRAIT_TRUE(IsVoid, void);
EXPECT_TRAIT_FALSE(IsVoid, int, Empty, nullptr_t);
EXPECT_TRAIT_TRUE(IsNullPointer, nullptr_t);
EXPECT_TRAIT_FALSE(IsNullPointer, void, int, Empty, decltype(0));
EXPECT_TRAIT_TRUE(IsFloatingPoint, float, double, long double);
EXPECT_TRAIT_FALSE(IsFloatingPoint, int, Empty, nullptr_t, void);
EXPECT_TRAIT_TRUE(IsArithmetic, float, double, long double, bool, size_t);
EXPECT_TRAIT_TRUE(IsArithmetic, char, signed char, unsigned char, char8_t, char16_t, char32_t);
EXPECT_TRAIT_TRUE(IsArithmetic, short, int, long, long long);
EXPECT_TRAIT_TRUE(IsArithmetic, unsigned short, unsigned int, unsigned long, unsigned long long);
EXPECT_TRAIT_FALSE(IsArithmetic, void, nullptr_t, Empty);
EXPECT_TRAIT_TRUE(IsFundamental, void, nullptr_t);
EXPECT_TRAIT_TRUE(IsFundamental, float, double, long double, bool, size_t);
EXPECT_TRAIT_TRUE(IsFundamental, char, signed char, unsigned char, char8_t, char16_t, char32_t);
EXPECT_TRAIT_TRUE(IsFundamental, short, int, long, long long);
EXPECT_TRAIT_TRUE(IsFundamental, unsigned short, unsigned int, unsigned long, unsigned long long);
EXPECT_TRAIT_FALSE(IsFundamental, Empty, int*, int&);
EXPECT_TRAIT_FALSE(IsSigned, unsigned);
EXPECT_TRAIT_FALSE(IsSigned, unsigned short);
EXPECT_TRAIT_FALSE(IsSigned, unsigned char);
EXPECT_TRAIT_FALSE(IsSigned, unsigned long);
EXPECT_TRAIT_TRUE(IsSigned, int);
EXPECT_TRAIT_TRUE(IsSigned, short);
EXPECT_TRAIT_TRUE(IsSigned, long);
EXPECT_TRAIT_TRUE(IsUnsigned, unsigned);
EXPECT_TRAIT_TRUE(IsUnsigned, unsigned short);
EXPECT_TRAIT_TRUE(IsUnsigned, unsigned char);
EXPECT_TRAIT_TRUE(IsUnsigned, unsigned long);
EXPECT_TRAIT_FALSE(IsUnsigned, int);
EXPECT_TRAIT_FALSE(IsUnsigned, short);
EXPECT_TRAIT_FALSE(IsUnsigned, long);
EXPECT_TRAIT_TRUE(IsEnum, Enummer);
EXPECT_TRAIT_FALSE(IsEnum, Empty);
EXPECT_TRAIT_FALSE(IsEnum, int);
EXPECT_TRAIT_FALSE(IsEnum, void);
EXPECT_TRAIT_FALSE(IsEnum, nullptr_t);
}
TEST_CASE(AddConst)
{
// clang-format off
using NoConstList = TypeList<int, const int, Empty, const Empty>;
using YesConstList = TypeList<const int, const int, const Empty, const Empty>;
// clang-format on
EXPECT_EQ_WITH_TRAIT(AddConst, NoConstList, YesConstList);
}
TEST_CASE(UnderlyingType)
{
using Type = UnderlyingType<Enummer>;
STATIC_EXPECT_EQ(Type, u8);
}
TEST_CASE(RemoveCVReference)
{
using TestTypeList = TypeList<int, int&, int const&, int volatile&, int const volatile&, int&&, int const&&, int volatile&&, int const volatile&&>;
using ResultTypeList = TypeList<int, int, int, int, int, int, int, int, int>;
EXPECT_EQ_WITH_TRAIT(RemoveCVReference, TestTypeList, ResultTypeList);
}
TEST_CASE(AddReference)
{
STATIC_EXPECT_EQ(AddLvalueReference<int>, int&);
STATIC_EXPECT_EQ(AddLvalueReference<int&>, int&);
STATIC_EXPECT_EQ(AddLvalueReference<int&&>, int&);
STATIC_EXPECT_EQ(AddRvalueReference<int>, int&&);
STATIC_EXPECT_EQ(AddRvalueReference<int&>, int&);
STATIC_EXPECT_EQ(AddRvalueReference<int&&>, int&&);
STATIC_EXPECT_EQ(AddLvalueReference<void>, void);
}
TEST_CASE(IsConvertible)
{
struct A {
};
struct B {
B(A);
};
struct C {
A a;
operator A() { return a; }
};
struct D {
};
EXPECT_VARIADIC_TRAIT_TRUE(IsConvertible, A, B);
EXPECT_VARIADIC_TRAIT_FALSE(IsConvertible, B, A);
EXPECT_VARIADIC_TRAIT_TRUE(IsConvertible, C, A);
EXPECT_VARIADIC_TRAIT_FALSE(IsConvertible, A, C);
EXPECT_VARIADIC_TRAIT_FALSE(IsConvertible, D, A);
EXPECT_VARIADIC_TRAIT_FALSE(IsConvertible, A, D);
}
TEST_CASE(IsAssignable)
{
EXPECT_VARIADIC_TRAIT_FALSE(IsAssignable, int, int);
EXPECT_VARIADIC_TRAIT_TRUE(IsAssignable, int&, int);
EXPECT_VARIADIC_TRAIT_FALSE(IsAssignable, int, void);
struct A {
};
EXPECT_TRAIT_TRUE(IsCopyAssignable, A);
EXPECT_TRAIT_TRUE(IsTriviallyCopyAssignable, A);
EXPECT_TRAIT_TRUE(IsMoveAssignable, A);
EXPECT_TRAIT_TRUE(IsTriviallyMoveAssignable, A);
struct B {
B& operator=(B const&) { return *this; }
B& operator=(B&&) { return *this; }
};
EXPECT_TRAIT_TRUE(IsCopyAssignable, B);
EXPECT_TRAIT_FALSE(IsTriviallyCopyAssignable, B);
EXPECT_TRAIT_TRUE(IsMoveAssignable, B);
EXPECT_TRAIT_FALSE(IsTriviallyMoveAssignable, B);
struct C {
C& operator=(C const&) = delete;
C& operator=(C&&) = delete;
};
EXPECT_TRAIT_FALSE(IsCopyAssignable, C);
EXPECT_TRAIT_FALSE(IsTriviallyCopyAssignable, C);
EXPECT_TRAIT_FALSE(IsMoveAssignable, C);
EXPECT_TRAIT_FALSE(IsTriviallyMoveAssignable, C);
}
TEST_CASE(IsConstructible)
{
struct A {
};
EXPECT_TRAIT_TRUE(IsCopyConstructible, A);
EXPECT_TRAIT_TRUE(IsTriviallyCopyConstructible, A);
EXPECT_TRAIT_TRUE(IsMoveConstructible, A);
EXPECT_TRAIT_TRUE(IsTriviallyMoveConstructible, A);
struct B {
B(B const&)
{
}
B(B&&)
{
}
};
EXPECT_TRAIT_TRUE(IsCopyConstructible, B);
EXPECT_TRAIT_FALSE(IsTriviallyCopyConstructible, B);
EXPECT_TRAIT_TRUE(IsMoveConstructible, B);
EXPECT_TRAIT_FALSE(IsTriviallyMoveConstructible, B);
struct C {
C(C const&) = delete;
C(C&&) = delete;
};
EXPECT_TRAIT_FALSE(IsCopyConstructible, C);
EXPECT_TRAIT_FALSE(IsTriviallyCopyConstructible, C);
EXPECT_TRAIT_FALSE(IsMoveConstructible, C);
EXPECT_TRAIT_FALSE(IsTriviallyMoveConstructible, C);
struct D {
D(int);
};
EXPECT_VARIADIC_TRAIT_TRUE(IsConstructible, D, int);
EXPECT_VARIADIC_TRAIT_TRUE(IsConstructible, D, char);
EXPECT_VARIADIC_TRAIT_FALSE(IsConstructible, D, char const*);
EXPECT_VARIADIC_TRAIT_FALSE(IsConstructible, D, void);
}
TEST_CASE(IsDestructible)
{
struct A {
};
EXPECT_TRAIT_TRUE(IsDestructible, A);
EXPECT_TRAIT_TRUE(IsTriviallyDestructible, A);
struct B {
~B()
{
}
};
EXPECT_TRAIT_TRUE(IsDestructible, B);
EXPECT_TRAIT_FALSE(IsTriviallyDestructible, B);
struct C {
~C() = delete;
};
EXPECT_TRAIT_FALSE(IsDestructible, C);
EXPECT_TRAIT_FALSE(IsTriviallyDestructible, C);
}
TEST_CASE(CommonType)
{
using TCommon0 = CommonType<int, float, char>;
EXPECT_VARIADIC_TRAIT_TRUE(IsSame, TCommon0, float);
using TCommon1 = CommonType<int, int, int, char>;
EXPECT_VARIADIC_TRAIT_TRUE(IsSame, TCommon1, int);
struct Foo {
};
using TCommon2 = CommonType<Foo, Foo, Foo>;
EXPECT_VARIADIC_TRAIT_TRUE(IsSame, TCommon2, Foo);
struct Bar {
operator Foo();
};
using TCommon3 = CommonType<Bar, Foo, Bar>;
EXPECT_VARIADIC_TRAIT_TRUE(IsSame, TCommon3, Foo);
}
