in pyo3_special_method_derive_macro/src/str_repr.rs [214:223]
fn parse(input: ParseStream) -> syn::Result<Self> {
let ident: Ident = input.parse()?;
let _eq_token: Token![=] = input.parse()?;
let lit_str: LitStr = input.parse()?;
Ok(FmtAttribute {
ident,
_eq_token,
lit_str,
})
}