News for hackers. Stuff that matters.

A comment on Should you learn C to “learn how the computer works”?. Parent comment

Re:Should you learn C to “learn how the computer works”? by jcelerier on Wednesday October 03, 2018 @02:26AM (#18128046)
> If a language lets you cause undefined behaviour via FFI into C,

FFI isn't into "C", it's into your operating system's binary format. And since no two systems behave the same, it's UB however you look at it.

[ Parent | on HN ]
Re:Should you learn C to “learn how the computer works”? by steveklabnik on Wednesday October 03, 2018 @11:00AM (#18130844)
> FFI isn't into "C", it's into your operating system's binary format.

Most people call that format "the C ABI," and "FFI into C" is short for "FFI via the C ABI."

> And since no two systems behave the same, it's UB however you look at it.

That's not what UB means. It would be implementation defined, not undefined.

[ Parent | on HN ]