syntax_data: {"ast_node_type":"variable","tokens":[{"end":32,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let sizeof_pointee =
context_before:             let rvalue = Rvalue::NullaryOp(NullOp::SizeOf, pointee_ty);
context_after:                 local_decls.push(LocalDecl::with_source_info(tcx.types.usize, source_info)).into();