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

Is there a reason nobody just casts var, your argument to SAFE_MALOC()? I mean, malloc() returns a pointer. You're storing it somewhere that accepts a pointer... There are all sorts of neat type-safe things that other folks have already pointed out... I'm just wondering why this didn't work:

#define MALLOC_SAFE(var,size)  {  \
    (* (void **) & (var)) = malloc(size); \
    if ( ! (var) ) goto error;    \
    }

Yeah... I know. It's sick, and throws type-safety right out the window. But a straight ((void *)(var))= cast wouldn't always work.