{"ast_node_type":"function","tokens":[{"end":87,"kind":"keyword","start":0,"text":"fn"}]}
    fn parse_pat_fields(&mut self) -> PResult<'a, (ThinVec<PatField>, PatFieldsRest)> {
    /// Parses the fields of a struct-like pattern.
        let mut fields: ThinVec<PatField> = ThinVec::new();