Compile fail test

compile_test.cpp

#include <type_traits>

/**
 * Test that 'Code' fails to compile.
 * 'Type' is aliased to 'Alias' and it must be used in 'Code'
 */
#define COMPILE_FAIL_TEST(Name, Type, Alias, Code)                                   \
    struct Name {                                                                    \
        template <typename Alias>                                                    \
        static auto compiles(Alias && ) -> decltype((void)(Code), std::true_type()); \
        static auto compiles(...) -> std::false_type;                                \
        static_assert(!decltype(compiles(std::declval<Type>()))(),                   \
                      "Compile test failure: " #Name);                               \
    }

/**
 * Test that 'Code' compiles (dual of COMPILE_FAIL_TEST).
 */
#define COMPILE_WORK_TEST(Name, Type, Alias, Code) \
    auto Name = [] {                               \
        using Alias = Type;                        \
        (void)(Code);                              \
    }

struct Foo {
    Foo(int) {}
};

COMPILE_FAIL_TEST(ConstructWithStr, Foo, T, T("100"));
COMPILE_WORK_TEST(ConstructWithInt, Foo, T, T(100));

int main() {}