{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":")"}]}
) -> Option<(CompileTimeInterpCx<'tcx>, OpTy<'tcx>)> {
    ty: Ty<'tcx>,
    let ecx = mk_eval_cx_to_read_const_val(tcx.tcx, tcx.span, typing_env, CanAccessMutGlobal::No);