{"ast_node_type":"function","tokens":[{"end":81,"kind":"keyword","start":0,"text":"fn"}]}
    fn recover_tilde_expr(&mut self, lo: Span) -> PResult<'a, (Span, ExprKind)> {
    /// Recover on `~expr` in favor of `!expr`.
        self.dcx().emit_err(errors::TildeAsUnaryOperator(lo));