¿La mejor manera de emular__typeof__ para msvc o una solución alternativa?

method-overloading visual-studio-2012

Question

Tengo un código

#define DEBUG_PRINT(x,...) /
    do /
    {/
        _Pragma("GCC diagnostic push") /
        _Pragma("GCC diagnostic ignored /"-Wunused-value/"") /
        __typeof__((0,x)) _x = x; /
        _Pragma("GCC diagnostic pop") /
        DEBUG_PRINT_PTR((#x), &_x, __VA_ARGS__);/
    } while(0)


//The repetition of debug_print_printf_specifier is to avoid repetition for custom types.
#define DEBUG_PRINT_PTR(xstr, xp,...) /
_Generic((*xp), /
const char *: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
char *: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
int: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
float: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
double: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
char: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
int16_t: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
uint16_t: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
uint32_t: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
int64_t: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
uint64_t: debug_print_printf_specifier(xstr, (void *)xp, TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__}))),/
default: DEBUG_PRINT_CUSTOM_TYPE(xstr, xp, __VA_ARGS__))

#define DEBUG_PRINT_CUSTOM_TYPE(xstr, xp,...) /
debug_print_custom_to_debug_string(xstr, xp, &((dsc_func_ptr){GET_CREATE_DEBUG_STRING_FUNC(xp)}), __FILE__, __LINE__, _my_func__,/
debug_print_options_apply_group_options(&((debug_print_options){__VA_ARGS__})))



#define GET_CREATE_DEBUG_STRING_FUNC(x) _Generic((x), /
debug_print_options *: debug_print_options_to_debug_string, /
debug_print_group_options *: debug_print_group_options_to_debug_string, /
default: print_not_valid_type_for_debug_print)

Necesito un puntero a x en DEBUG_PRINT que puede ser una variable o una expresión. Para admitir expresiones, las asigno a un temporal y luego tomo la dirección de eso. Podría emular __typeof__ con _Generic para un conjunto limitado de tipos, pero los usuarios tendrían que agregar líneas para tipos personalizados en 2 lugares. Hay alguna otra manera de hacer esto? Estaría bien si solo soporte el último compilador de Microsoft C.

Answer 1

char: debug_print_printf_specifier("x"//z.str, (void *)xp, / 
TYPE_PTR_TO_PRINTF_SPECIFIER(xp), __FILE__, __LINE__, _my_func__, / 
debug_print_options_apply_group_options(&((debug_print_options{__VA_ARGS__}))),/
z=ptr.x
//just create a ptr z for x... :D

simple como eso .. ;)