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the SLANG EXTENSION and Guest Programming >> Bug Reports for Slangmgh >> RegEx, predefined classe \b (wordboundary)
http://forums.eccoMAGIC.com/forum/YaBB.pl?num=1258634496

Message started by JohnSmith on 11/19/09 at 06:41:36

Title: RegEx, predefined classe \b (wordboundary)
Post by JohnSmith on 11/19/09 at 06:41:36

Just have noticed that in regex expression (EccoExt v4.0.0.5) , predefined classe \b don't work, a \\b is required to make it work.

e.g. rule function match('checking RegEx','\bReg') returns empty string

to make it work use '\\b' instead of '\b', e.g. match('checking RegEx','\\bReg') returns 'Reg'.

Best Regards,
JS

Title: Re: RegEx, predefined classe \b (wordboundary)
Post by Admin on 11/19/09 at 15:54:12

this is (at least in part) due to the regex engine itself.

1. can use \B in place of \b (which is as Regex technically backwards, \B should be NOT a boundary ... but then again...)

2. double slash "\\" is interpreted as single slash. (if you *want* double slash, eg., literal slash, must use four slashes, "\\\\"

(untested if issue 2 is local extension or regex engine issue)