declare – Declare register names locally

Th­ese macros pro­vide a method of lo­cally al­lo­cat­ing reg­is­ters with­out in­ter­fer­ence with pre­vi­ously al­lo­cated reg­is­ters; thus \de­clare­count al­lo­cates a count for lo­cal use, in ex­actly the same way that \new­count al­lo­ca­tions one for global use. The se­quence
    {... \de­clare­count\foo ... \new­count\bar ...} is of course a log­i­cal er­ror; any \new* com­mand should be is­sued be­fore the cor­re­spond­ing \de­clare* com­mand.