LookBehind and OR (‘|’) regular expression bug. - SyntaxEditor for Windows Forms Forum

Posted 20 years ago by mbren

There seems to be a bug regarding having OR regular expressions in the LookBehind attribute of a pattern.

While

LookBehind="cat|dog"

will work,

LookBehind="cat|dog|tiger"

will produce the following error and stacktrace.

Stack empty.
   at System.Collections.Stack.Pop()
   at _28._1()
   at _28._1(Int32 , _30 , Int32 )
   at _28._1(_30 )
   at _28._1(_30 , Boolean )
   at ActiproSoftware.SyntaxEditor.LexicalPatternGroup._1()
   at ActiproSoftware.SyntaxEditor.LexicalState._1()
   at ActiproSoftware.SyntaxEditor.LexicalState._1(StringBuilder , Int32& , Int32 , LexicalPattern& )
   at _19._1(SyntaxLanguage , StringBuilder , Int32& , Int32 , _18 , Token , Int32 )
   at ActiproSoftware.SyntaxEditor.Document.Reparse()
   at ActiproSoftware.SyntaxEditor.Document.set_Language(SyntaxLanguage value)
   at ActiproSoftware.SyntaxEditor.Document.LoadLanguageFromXml(String filename, Int32 encryptionKey)

It is worth noting that

LookAhead="cat|dog|tiger"

produces no such error and behaves correctly.

Comments (3)

Posted 20 years ago by Actipro Software Support - Cleveland, OH, USA

Thanks... we'll get this fixed.

Actipro Software Support

Posted 20 years ago by Actipro Software Support - Cleveland, OH, USA

This is fixed for the upcoming maintenance release by the way.

Actipro Software Support

Posted 20 years ago by mbren

Thanks

The latest build of this product (v24.1.1) was released 4 months ago, which was after the last post in this thread.

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