refactored Topology to make it a value (immutable) class
darcs-hash:
20060102062808-5007d-
b2bc0b6e025f75803c863795a62a65c316c6c155.gz
added arbitrary expression inversion, lookforward, and syntax for lookback
darcs-hash:
20060102053846-5007d-
1a809fad56c9ef6fd554fca18f7067b3ff5d5c0b.gz
convered maximal to use character lookahead
darcs-hash:
20060102034924-5007d-
d76e881205902ded81ca8826b94b9e865e1e232c.gz
removed illegal use of double-star
darcs-hash:
20060102024750-5007d-
24a3c776616cb59c9a5d4188915629d261702f7d.gz