DioxusLabs/dioxus · error · syn::Error

Props is not supported for unions

Error message

Props is not supported for unions

What it means

Error "Props is not supported for unions" thrown in DioxusLabs/dioxus.

Source

Thrown at packages/core-macro/src/props/mod.rs:69

            }
            syn::Fields::Unnamed(_) => {
                return Err(Error::new(
                    ast.span(),
                    "Props is not supported for tuple structs",
                ));
            }
            syn::Fields::Unit => {
                return Err(Error::new(
                    ast.span(),
                    "Props is not supported for unit structs",
                ));
            }
        },
        syn::Data::Enum(_) => {
            return Err(Error::new(ast.span(), "Props is not supported for enums"));
        }
        syn::Data::Union(_) => {
            return Err(Error::new(ast.span(), "Props is not supported for unions"));
        }
    };
    Ok(data)
}

mod util {
    use quote::ToTokens;

    pub fn path_to_single_string(path: &syn::Path) -> Option<String> {
        if path.leading_colon.is_some() {
            return None;
        }
        let mut it = path.segments.iter();
        let segment = it.next()?;
        if it.next().is_some() {
            // Multipart path
            return None;
        }

View on GitHub (pinned to 393d190a80)

When it happens

Trigger: Thrown at packages/core-macro/src/props/mod.rs:69 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/2836480292c5c3e9. Report an issue: GitHub.