loris has asked for the wisdom of the Perl Monks concerning the following question:


What would the best way of testing whether two regexes are equivalent? In particular, I am interested in seeing whether some apparently complex regex is actually equivalent to


I could obviously construct a set of strings which are somehow typical and see whether both regexes selected the same set, but that would demonstrate only rather limited equivalence and seems a bit of lame approach.



"It took Loris ten minutes to eat a satsuma . . . twenty minutes to get from one end of his branch to the other . . . and an hour to scratch his bottom. But Slow Loris didn't care. He had a secret . . ."