Allow conditional compilation when using wasm_bindgen proc-macro

[nappa85]

Describe the Bug

I'm able to apply conditionally wasm_bindgen proc-macro, but not his attributes

Steps to Reproduce

let's say we have a "wasm" feature

#[cfg_attr(feature = "wasm", wasm_bindgen_macro::wasm_bindgen)]
pub MyStruct {
  #[cfg_attr(feature = "wasm", wasm_bindgen(skip))] // THIS DOESN'T WORK
  pub my_field: MyWrapperType,
}

Expected Behavior

I'm able to use proc-macro attributes when using conditional compilation

Actual Behavior

cannot find attribute `wasm_bindgen` in this scope
`wasm_bindgen` is in scope, but it is a crate, not an attribute
consider importing one of these items:
  use wasm_bindgen::prelude::wasm_bindgen;
  use wasm_bindgen_macro::wasm_bindgen;

[ranile]

You don't need the cfg_attr if your entire struct cfg'd out. But I can totally see a situation where conditionally applying wasm-bindgen attributes to fields is needed so this issue should be fixed.

[nappa85]

Without cfg_attr on the attribute you get an error if the feature isn't active since the attribute isn't recognized by any proc macro Il ven 27 ott 2023, 14:51 Muhammad Hamza ***@***.***> ha scritto:

…

You don't need the cfg_attr if your entire struct cfg'd out. But I can totally see a situation where conditionally applying wasm-bindgen attributes to fields is needed so this issue should be fixed. — Reply to this email directly, view it on GitHub <#3671 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABZXINIOWAYC5NUYYLEFTLTYBOU4VAVCNFSM6AAAAAA6SYLXFOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTOOBSHA3DINBRG4> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[luke-biel]

Any chance for someone to look at this? I stumbled upon same issue in my code as well.