Procedural macro for RowValue

[Flowneee]

Implementations of RowValue for structs is usually simple and all similar, so it make sense to make #[derive(RowValue)] macro (in our case we had struct with over 150 fields). We currently have our own implementation of this procedural macro and we want to have it in rust-oracle. Do you interested in PR in this repo (with proc-macro crate, enabled by feature) or should we publish it separately?

Example

#[derive(RowValue)]
struct Row {
    id: i64,
    #[row_value(rename = "timestamp")
    ts: NaiveDateTime,
    #[row_value(with = "custom::parse::fn")]
    name: Option<String>,
}

[kubo]

@Flowneee
Thanks. It is very interesting. The pull request is welcome!

[kubo]

Thanks! #51 was merged.

I'll revise doc comment about the RowValue derive macro later because it is placed in docs about the oracle crate.