Expose decodePatternSet

[dylex]

Would you mind adding Text.Regex.TDFA.TNFA.decodePatternSet to the export list? parseRegex and others have been very useful in implementing regex proceessors, but decodePatternSet would be a great help, too.

[andreasabel]

decodePatternSet is more logically be exported from Text.Regex.TDFA.Pattern.