The Racket repository
5b9f0aa322
`make-regexp-tweaker', which produces a regexp that cannot match an empty string at the beginning or the end of the input. This: * simplies a whole bunch of messy and fragile code * makes `regexp-split' and friends usable with a pattern like #px"\\b" (which previously would match in every position, making it explode the string to 1-character strings) * makes it even closer to what perl does, the only way that we produce a different result from perl now is that we don't blindly drop empty matches at the end like perl (it *does* keep empty matches in the beginning though) The two tests that demonstrated the difference are now changed, and a bunch of other tests added. svn: r12575 |
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