syntax_data: {"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"&&"}]}
source_snippet:                     && let Some(len) = ct_len.try_to_target_usize(self.tcx())
context_before:                     && let ty::Uint(ty::UintTy::U8) = elem.kind()
context_after:                 {