"\n" is non whitespace token?

SyntaxEditor for Windows Forms Forum

Posted 14 years ago by Alex_3333
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I set code lower to the main form of the sample application with default sample document:

TokenStream tokenstream = this.editor.Document.GetTokenStream( 0 );
Token token = null;
while ( !( token = tokenstream.Read() ).IsEndOfDocument )
if ( token.Text == "\n" && !token.IsWhitespace )
MessageBox.Show( "Error" );

and see "Error" three times.

Comments (3)

Posted 14 years ago by Actipro Software Support - Cleveland, OH, USA
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You have to set the IsWhitespace flag in your language definitions for each pattern group. The lexical scanner doesn't assign that flag dynamically. See this example in the C# language definition:

<RegexPatternGroup Token="LineTerminatorToken" PatternValue="{LineTerminatorMacro}" IsWhitespace="True" />


Actipro Software Support

Posted 14 years ago by Alex_3333
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Sorry but I am slow-witted <IMG SRC="smile.gif" border="0"> I tell about SyntaxEditor' sample application and its sample C# language definition. As I understand mentioned pattern group sescribes line terminator tokens at the document. Why 3 of 56 "\n" tokens are non whitespace one?
Posted 14 years ago by Actipro Software Support - Cleveland, OH, USA
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I just took a look and see what you mean. Some of the pattern groups that end scopes with a line terminator do not have the IsWhitespace="true" flag set. I added those in for the next release.


Actipro Software Support

The latest build of this product (v2018.1 build 0341) was released 3 months ago, which was after the last post in this thread.

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