select! macro and auto-complete

[hasezoey]

Currently with crossbeam 0.8.2 using select! with rust-analyzer (and rustfmt) is quite annoying because rustfmt cannot format the inner contents and rust-analyzer cannot give much or any auto-completion (especially on incomplete input like msg.).

Full Repository

rust-lang/rust-analyzer#12759

Workarounds would be to use functions instead of a macro, but in my opinion using Select directly currently is somewhat unsafe / a maintenance problem, because indexes out-of-bounds could be used or the order of events might be change and with that the returned index but the match block might be forgotten to be changed and so lead to a panic (assert on pointers).
Something to fix this would be something akin to sel.recv(&rx1, SomeEnum::rx1)(where either the enum is a u* or Hash?) and later matching against that enum (in case it is already defined a panic should be used) or directly (if possible) store the receiver and return it with the SelectedOperation

[taiki-e]

Hmm, unlike the RA issue you linked, our select macro is not proc macro. So, aside from the formatter, it is odd that auto comp doesn't work at all.