[Feat] compile-time random

[BWindey]

It would be cool to have compile-time variant of the current macros and functions providing random values at runtime. This should not be a complicated or particularly high entropy random generator, but could f.e. read out the needed bytes from /dev/random (on Unix) and insert them with the requested type in the code.

Example syntax:

int rand_nr = (int) $$RANDOM;

It could also be a function/macro (https://c3-lang.org/misc-advanced/builtins/), accepting ranges, types and/or length (amount bytes - usefull for array maybe?).

An alternative is using $exec() of course.

[lerno]

1. It's just a seed, so $$RANDOM returns a number that is the same across the entire compilation. More like a unique value.
2. It's $random(low, high) values
3. It's just $random() and returns the classic [0.0, 1) double, which then can be used to generate any range.

[lerno]

Which would be the most useful?

[BWindey]

Good question. I feel like $$RANDOM has limited use-case when it's the same for the whole compilation (but then again, how much random do you want at compile-time).
A $random(low, high) or $random() seems more useful, and could be assigned to a compile-time constant to use throughout compilation to mimic the idea of $$RANDOM.

I don't really know whether (low, high) or [0.0, 1) would be more useful. Both can be easily transformed into each other, but I don't know which one would need transformation the most (as in which one is used least and has to be transformed).
My use case needed integers.

[lerno]

Please try it out. It's available through the @rnd() macro.

[BWindey]

This works as expected. Thank you!