fix to extract comments to stop internal error

[rchaser53]

fix: #3851

[rchaser53]

Perhaps there is a better way than adding a flag. But I can't think of a good idea ...

[topecongiro]

What about inspecting the content of orig_rhs and see if it starts with the comment? Something like the following:

let has_rhs_comment = orig_rhs.map_or(false, |s| starts_with_comment(s.trim_left()));

[rchaser53]

I tried your proposal, but it's failed. The orig_rhs doesn't have the comments. The lhs has the comment and indent insteadof orig_rhs. below is an example.

fn main() {
    let after =
    // after_comment
    if true {
        1.0
    };
}
// &lhs = "let after =\n    // after_comment\n    "
// &orig_rhs = Some("if true {\n        1.0\n    }",)

lhs is this

[topecongiro]

I see, thank you for your explanation. In that case, is it possible to use the lhs to detect comments instead? Something like the following:

let has_rhs_comment = !lhs.trim_right().ends_with_comment();

[rchaser53]

Absolutely. It's a good idea. I fixed it.

[rchaser53]

I reverted the commit.