{"ast_node_type":"other","tokens":[{"end":15,"kind":"keyword","start":0,"text":")"}]}
    ) -> Self {
        _ecx: &mut InterpCx<'tcx, CompileTimeMachine<'tcx>>,
        ConstAlloc { alloc_id: mplace.ptr().provenance.unwrap().alloc_id(), ty: mplace.layout.ty }