syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":")"}]}
source_snippet:     ) -> Result<(ty::ValTree<'tcx>, Ty<'tcx>), interpret::ErrorHandled> {
context_before:         constant: ConstOperand<'tcx>,
context_after:         assert!(!constant.const_.ty().has_param());