Parse expr disallowing structs

[utkarshkukreti]

Hi, is there any way to call this function from the public API of syn?

I want to parse a Rust's for-like expression and using the normal Expr parser fails on for x in y {} as it thinks that y {} is a struct expression.

[dtolnay]

This is not currently supported. I would be prepared to consider a PR that exposes it as something like Expr::parse_without_eager_brace (documented with explanation and realistic example).