Generate getter/setter for fields

[fafhrd91]

Add proc attr that automatically creates getter and setter for struct field

#[py::class]
struct cls {
    #[prop(setter, getter)]
    num: i32
}

[fafhrd91]

@messense want to do this too?

[messense]

I am not sure about this one. I don't know much about syn, might need to take some time learning the basics. Debugging isn't easy either.

[fafhrd91]

You can always use println! Also cargo expand shows expanded macros.

[messense]

I'll give it a try.

[messense]

messense@b10089d

Progress so far. Not sure how to add impls, it's not like #[methods] that already have impl blocks.

[fafhrd91]

you can access attributes of struct, so just generate wrap method and directly access attributes.
also you can create multiple impl blocks

[messense]

I need syn::Ty of the struct but I only have syn::Ident, not sure how to get syn::Ty for the struct from syn::DeriveInput

https://dtolnay.github.io/syn/syn/struct.DeriveInput.html

[fafhrd91]

is this what you need?
https://github.com/PyO3/pyo3/blob/master/pyo3cls/src/py_class.rs#L17
https://github.com/PyO3/pyo3/blob/master/pyo3cls/src/py_class.rs#L222

[messense]

I don't think so, that gives me syn::Ty of the struct field while I need syn::Ty of the struct itself to pass to impl_wrap_getter/impl_wrap_setter

[fafhrd91]

but all you need is name of the struct, it is type.

[fafhrd91]

example https://github.com/PyO3/pyo3/blob/master/pyo3cls/src/py_method.rs#L60

[messense]

I tried but there are a lot of subtle details that I am not aware of. I doubt I can finish this recently so if you want to implement it yourself it's ok.

[fafhrd91]

It is fine, it is not priority