syntax_data: {"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let rvalue = Rvalue::Cast(CastKind::Transmute, source_op, operand_int_ty);
context_before:             local_decls.push(LocalDecl::with_source_info(operand_int_ty, source_info)).into();
context_after:         block_data.statements.push(Statement::new(