.xx meta.keywords="regular expression null subexpression tests"

.MT 4

.TL

regular expression null subexpression tests

.AF "AT&T Research - Florham Park NJ"

.AU "Glenn Fowler <gsf@research.att.com>"

.H 1

The

.B regex

tests in

.xx link=nullsubexpr.dat

exercise

.B regex

null subexpression matching.