cat­codes – Generic han­dling of TeX cat­e­gory codes

The bun­dle deals with cat­e­gory code switch­ing; the pack­ages of the bun­dle should work with any TeX for­mat (with the sup­port of the plainpkg pack­age).
The bun­dle pro­vides: – stack­let.sty, which sup­ports stacks that con­trol the use of dif­fer­ent cat­codes; – act­codes.sty, which deals with ac­tive char­ac­ters; and – catchdq.sty, which pro­vides a sim­ple quo­ta­tion char­ac­ter con­trol mech­a­nism.