C and C++ are completely different languages. The arbitrary parsing of data into structs in C is what makes it incredibly suitable for file parsing. Among other things.
The software industry has been dealing with the fallout of these issues for the past three decades. It's about time we moved the bar higher.
By the way, the main data structure of my first large Rust program was simply a vector of a custom struct, optimized for memory footprint. Just like in C, with the same low overhead serialization.
With C, you always have to be careful to not overrun a buffer. The recent NSS vulnerability is a great example of this:
https://googleprojectzero.blogspot.com/2021/12/this-shouldnt...
Even though this code was heavily fuzzed and tested, the problem slipped through. Not possible in Rust. Also, with Rust you can throw away all your sanitizer infrastructure and save all the associated costs.
It is not, they diverged since decades now.
Still, even if this was the case, the programming styles are so different that there’s nothing to gain considering them as any more similar as any two other languages.
AFAIK you always had to cast `void *` in C++ (like the return value of `malloc`).
Idiomatic C code doesn't explicitly cast the return value of malloc
foo *bar = malloc(sizeof *bar);
foo *bar = (foo *)malloc(sizeof *bar);
My understanding is that most implementations of new call malloc under the hood (this may or may not be outdated at this point, I haven't kept up with C++ implementation) and both of these systems introduce a layer of record keeping, so if you're in an extremely memory constrained environment, you may want to use malloc directly.
If you want your code to be noexcept, you need to call malloc and handle the case where it returns null as new can throw (this is UB in theory, but in practice I'm pretty sure everything just aborts) to strip out all the stack-unwinding code.
If you want to avoid the constructor call (for whatever reason).
That was the point of my original comment that C++ and C are not the same language :)