Re: Casting the return value of ...

Andrey Tarasevich <andreytarasevich@hotmail.com> writes:
[...]

No, it isn't even remotely the same. C language allows implicit casts
from any object pointer type to `void *` and vice-versa. Which is why
casting the result of `malloc` is unnecessary.

To be picky, there are no "implicit casts".  There are implicit
conversions.  A cast is an explicit conversion.

C language does not support implicit casts between object pointer
types (like `void *`) and function pointer types. Moreover, C language
still does not support _explicit_ casts between `void *` and function
pointer types either. POSIX guarantees/requirements are not C.

It "does not support" them in the sense that it does not define their
behavior.  Such a cast does not violate any constraint, and an
implementation or third-party standard is free to define the semantics.

By contrast, conversions between floating types and pointer types are
constraint violations.

[...]

--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Medtronic
void Void(void) { Void(); } /* The recursive call of the void */