fn duplicate_struct()

in gazebo_derive/src/util.rs [27:58]

• 29 lines of code
• 1 McCabe index (conditional complexity)

fn duplicate_struct(data: &DataStruct, duplicate: &TokenStream) -> TokenStream {
    match data.fields {
        Fields::Named(ref fields) => {
            // Self {x: clone(self.x), y: clone(self.y)}
            let xs = fields.named.iter().map(|f| {
                let name = &f.ident;
                quote_spanned! {f.span() =>
                    #name: #duplicate(&self.#name)
                }
            });
            quote! {
                Self { #(#xs, )* }
            }
        }
        Fields::Unnamed(ref fields) => {
            // Self(clone(self.0), clone(self.1))
            let xs = fields.unnamed.iter().enumerate().map(|(i, f)| {
                let index = Index::from(i);
                quote_spanned! {f.span()=>
                    #duplicate(&self.#index)
                }
            });
            quote! {
                Self ( #(#xs, )* )
            }
        }
        Fields::Unit => {
            // Self
            quote!(Self)
        }
    }
}