Several years ago, I specialized in Delphi software development.
Amongst several other endeavors, I wrote and sold a Regular Expression matcher. Well, it turns out that my matcher has a significant bug that was only just noticed by a user - handling of “$” to require a match to finish at the end of the line was broken.
For future reference of anyone consulting with Professor Google or Doctor Bing, here’s the fix.
The code inside
TniRegularExpressionMatcher.MatchExpression is missing a check for
Inside the repeat loop:
This code needs to check for mfFinishOnly as follows:
In english: If mfFinishOnly is not specified, any match is acceptable; if we’re at the end of the string, the match is always acceptable.