Reference autocompletion inserts & in wrong place in macros

[flodiebold]

I could have sworn we have a ticket for this, but I couldn't find it.

// some extra text

enum Foo { Bar }

fn foo(foo: &Foo) {}

fn test() {
    println!("{}", foo(Foo::Ba<|>))
}

using the &Bar completion here inserts the ampersand in the wrong place.

[Veykril]

We had one for attributes, I'd expect us to not even offer these in macros currently