Why #var instead of $var?

[withoutboats]

I was wondering why quote uses #var interpolation syntax instead of $var. My guess is that this is a limitation of the macro_rules system and not an intentional design decision. Is that correct? Is this a limitation that could be revisited in macros 2.0?

[dtolnay]

It is a limitation of macro_rules and could be revisited in macros 2.0. See the three comments starting at rust-lang/rust#35900 (comment).

[withoutboats]

Thanks for the answer. I think we want to revisit how matching happens in 2.0 in general, its currently got a lot of limitations that could probably be rebalanced based on our experience with macro_rules.