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Thanks for the report, this definitely looks like a bug. I'll see to have this fixed in the next release.

Cheers, Edi.

On Wed, Jun 24, 2009 at 10:45 PM, Dan Monizdnm@pobox.com wrote:

Hi there,

I'm using Regex Coach 0.9.2 (built with CL-PPCRE 1.3.2) and noticed some unexpected behavior when using the \b token. It seems to be working fine, but the Info tab displays "the selection is NIL" for the token, rather than the expected word boundary explanation. It *does* seem to get \B (the negation of \b) right: "the selection is a space between two characters which is not a word boundary".

I initially discovered this while trying to troubleshoot and test a regex from another system/product (unrelated, and at present I'm not certain what regex engine it uses, though I'm assuming PCRE or POSIX with GNU extensions):

regex: type\b\w*?\btext\b\w*?\bjavascript

using Regex Coach's Info and Tree tabs to "debug" the expression and why it wasn't seeming to match a string I though it should. Initially I thought \b might be unsupported, but it does seem to work in a simpler test case:

regex: \bis\b string: This island is beautiful

The CL-PPCRE documentation confirmed that both \b and \B were supported as well. Nonetheless, the NIL replacement in the Info tab was odd.

FWIW, I'm running on Windows Vista Ultimate with SP1 installed.

Hope this helps. Thanks for making Regex Coach, and thanks for making it available.

-- Dan Moniz dnm@pobox.com [http://pobox.com/~dnm/]