Rustfmt fails with 'line exceeded max length' on use of thread_local!

[Marwes]

Rustfmt fails with Rustfmt failed at ./base/src\interner.rs:163: line exceeded maximum length (sorry) when I run it against the crate base of embed_lang.

diff

I would guess that this is because formatting macros are tricky or even impossible in some cases. Might need a better error message if it is not deemed possible however.

[nrc]

Yeah, likely to be because it's a macro use. We ought to be able to fix this eventually, but it is a little more challenging than other stuff. In the mean time, if you manually fix it up (to fit within the line limit), Rustfmt shouldn't break your formatting.

[radix]

perhaps certain common macros that are built-in to rust should be whitelisted as being equivalent to function calls? I ran into this with assert_eq! too

[nrc]

We actually try to format all macro calls as if they were functions, but sometimes that doesn't work and then we pretty much give up. I would have thought assert_eq would get reformatted properly though.

[radix]

hm. well, I reported (and then closed) a case of assert_eq! not being formatted properly in #1868, maybe that's worth double-checking...