DioxusLabs/dioxus · error · syn::Error

Receiver parameters are not supported

Error message

Receiver parameters are not supported

What it means

Error "Receiver parameters are not supported" thrown in DioxusLabs/dioxus.

Source

Thrown at packages/core-macro/src/component.rs:498

        ));
    }

    // 4. we can't handle const components
    if item_fn.sig.constness.is_some() {
        return Err(Error::new(
            item_fn.sig.constness.span(),
            "Const components are not supported".to_string(),
        ));
    }

    // 5. no receiver parameters
    if item_fn
        .sig
        .inputs
        .iter()
        .any(|f| matches!(f, FnArg::Receiver(_)))
    {
        return Err(Error::new(
            item_fn.sig.inputs.span(),
            "Receiver parameters are not supported".to_string(),
        ));
    }

    Ok(())
}

/// Convert a function arg with a given visibility (provided by the function) and then generate a field for the
/// associated props struct.
fn make_prop_struct_field(f: &FnArg, vis: &Visibility) -> TokenStream {
    // There's no receivers (&self) allowed in the component body
    let FnArg::Typed(pt) = f else { unreachable!() };

    let arg_pat = match pt.pat.as_ref() {
        // rip off mutability
        // todo: we actually don't want any of the extra bits of the field pattern
        Pat::Ident(f) => {

View on GitHub (pinned to 393d190a80)

When it happens

Trigger: Thrown at packages/core-macro/src/component.rs:498 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of DioxusLabs/dioxus@393d190a80 (2026-08-16). Data as JSON: /api/errors/35dd74b2022847cf. Report an issue: GitHub.