syntax_data: {"ast_node_type":"variable","tokens":[{"end":31,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let rvalue = match op {
context_before:         let bool_ty = self.tcx.types.bool;
context_after:             BinOp::Add | BinOp::Sub | BinOp::Mul if self.check_overflow && ty.is_integral() => {