{"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"cnst.try_to_target_usize(self.tcx)"}]}
        cnst.try_to_target_usize(self.tcx)
    pub fn eval_target_usize_ty(&self, cnst: ty::Const<'tcx>) -> Result<u64, B::Error> {
            .ok_or_else(|| B::Error::new(format!("Const `{cnst:?}` cannot be encoded as u64")))