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Theres a great example of what you can do with this, submitted and discussed on HN here: https://news.ycombinator.com/item?id=25690319

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>Format specifiers can take extra “arguments”. - "%hhn": store the number of bytes written mod 256 to the char pointer ...

Oh boy. I'll put that down for my "thing I don't think I wanted to know" of the day.

There is some innocent beauty in the twistedness of printf - especially with GNU extensions.

So I can port doom to gnu printf?

GNU's printf specifier language is Turing complete, I believe.

GNU's printf is Turing complete[0]... so "yes."

[0] Mentioned (but not directly linked) by TFA:

https://www.usenix.org/conference/usenixsecurity15/technical...

GNU's printf specifier language is Turing complete, I believe.

What is up with this thread? These comments are duplicated from the top thread...

(The usernames are different)

Is it possible that it's a joke based on the material of the OP? Maybe we're trapped in some sort of International Obfuscated Internet Thread Contest...

Edit: ok, I'm guessing it's a joke about Turing completeness. Loops, you know.

Ohhhh... Now I get it.

It’s a joke about the recursion introduced here: https://news.ycombinator.com/item?id=25691615.

Well executed jokes on HN. 2021 already is a crazy year.

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