Autocomplete not working with unclosed macro parenthesis

[GoldsteinE]

fn func() { }

fn main() {
    println!("{:?}", fu<Tab>
}

Autocomplete is not working here, hover is showing something unrelated: fn _print(args: Arguments)

[Veykril]

I am inclined to close this as wont-fix. We don't expand unclosed macros as we potentially add a ton of tokens to it which can have varying effects on it. Even if we expand those macro calls, the extra tokens will affect what macro matcher we pick which might also degrade completion quality.

[GoldsteinE]

The other possible solution is to ignore unclosed macro instead of expanding it and complete as it's not there. It feels like it could give decent completion quality.

[Veykril]

That will end up with a bad quality in a lot of cases, a macro doesn't necessarily expect expressions as the input.

[GoldsteinE]

A lot of macros expect expressions as the input, and the alternative is no completion at all. I guess the concern is editor setups where the autocomplete is truly “auto” and pops up without pressing a trigger key (which is the default in VS Code AFAIR?). An opt-in option to enable “completion as if macro is not there” would be helpful for people who use manually triggered completion.