Macro metavar `length` got renamed to `len`

[Veykril]

See rust-lang/rust#124987, we need to do the same

[lnicola]

I guess this is

rust-analyzer/crates/mbe/src/parser.rs

Line 348 in 6524922

"length" => Op::Length { depth: parse_depth(&mut args)? },

, but should we wait until 1.80 is released?

[Veykril]

Well, it is still unstable and fortunately the standard library doesn't use this one so I don't think there is any value in waiting on it? (though we could temporarily support both)

[randomicon00]

Hi @Veykril & @lnicola, Currently, I have more free time to contribute to rust-analyzer. I would like to work on it!

[Veykril]

Go ahead!

[lnicola]

Fixed in #17242.