unreadable_literal is annoying for hex numbers

[vks]

When having hex literals in code, conciseness is usually more important than readability, so the lint seems to be counter-productive in such cases.

[flip1995]

Do you have some examples for this? IMO this lint suggests more readable Hex-literals (most of the time).

[newpavlov]

For example in RustCrypto crates we selectively disable unreadable_literal for most of the constants. I just don't see the point in making files like this more "readable".

[flip1995]

Yeah making walls of hex-literals more readable doesn't really make sense. But I would say this is an edge case, since you shouldn't have things like this spread around in your code, but only in a few special files. Disabling the lint in those files seems reasonable to me.

This lint aims more on single literals in your Code, like

const IM_A_FLAG: u16 = 0x00FF8000;
vs
const IM_A_READABLE_FLAG: u16 = 0x00FF_8000;

IMO the second version is nicer.