Source references in docs generated by rustdoc lead to the macro callsite instead of the original function

[Veetaha]

If you click on any Source link for the methods in this library, the line of code that is opened is the line of #[bon] macro call site, not the original function itself.

Instead, the docs should forward to the function that was used to generate the builder.

[Eisverygoodletter]

Hi, I've been using bon for a while and I'd like to work on this issue.

I currently have a rough idea of a fix: when processing

#[bon]
impl BigStruct {
    fn my_method(a: i32) {...}
}

The original ItemFn for my_method gets turned into adapted_fn and preserves its span. That version is hidden and renamed with a __orig_ prefix. The version shown on docs is start_fn which I'm guessing is produced by proc macros and does not re-use the span from the original ItemFn.

There's still a few spots I need to look further into, such as rustdoc using the overall function span instead of just the identifier for link generation. I want to check that nobody else is already working on this before I start though. Can I be assigned this issue if possible?

[Veetaha]

Hi @Eisverygoodletter, this is a tricky issue. I'm sure noone is working on, as it requires a bunch of experimentation that I have low confidence would lead to a good wokraround. However, if you feel like doing it, feel free to work on this issue, I'm ready to be pleasantly surprised and proven wrong. I don't usally add anyone as assignees which could serve as a sign of commitment, while I don't want that pressure put on anyone. Just a comment is enough I think