C->C++ Automatically cast void pointer into Type pointer in C++ in #define in case of type is not given (C-style) [MSVS]

Question

Hi!

I\'ve used the following C macro, But in C++ it can\'t automatically cast void* to type*

Answer 1

For example, like this:

template 
void malloc_safe_impl(T** p, size_t size)
{
    *p = static_cast(malloc(size));
}

#define MALLOC_SAFE(var, size) { \
    malloc_safe_impl(&var, size); \
    if (!var) goto error; \
}