.xx meta.keywords="regex catenation associativity tests" .MT 4 .TL regex catenation associativity tests .AF "AT&T Research - Florham Park NJ" .AU "Glenn Fowler <[email protected]>" .H 1 The .B regex tests in { .xx link=leftassoc.dat .xx link=rightassoc.dat .xx link=forcedassoc.dat } exercise the associativity of catenation.