standard library: arbitrary precision integer

[andrewrk]

We're going to need it when we eventually self-host (#89)

[tiehuis]

Just wanted to mention that I've started implementing an arbitrary precision integer library over here. Very early days right now but it should eventually reach a reasonable point.

[andrewrk]

excellent! let me know if/when you want some code review.

[andrewrk]

There's also an arbitrary precision integer implementation in LLVM which may be clearer to read than GMP

[tiehuis]

Interesting, did not know that (makes sense though). In terms of GMP, I haven't really looked at the code, largely due to its license. It's a bit arcane from memory too, though!

Just for reference, here are some implementations which are useful.

• Rust Num (Very simple, good reference)
• Go math/big (Fairly fast, assembly routines)