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Xtext Validation Error Markers [message #1726527]

Mon, 14 March 2016 12:37

Ronan B

Messages: 273
Registered: July 2009

Senior Member

Hi,
I'm having problems setting errors on a multivalued list of type String. When there is an error, because more than one description is defined, the editor shows error underlining on everything in the container., see picture attached. The error markers in the margin are correct.

Considering the following grammar snippet:

Container returns my::Container:
	'container'name=OptionallyQuotedName'{'
		( 
	        ( 'config' configList+=Boolean ';' )
		| ( 'status' statusList+=StatusKind ';' )
		| ( 'description' descriptionList+=(ConcatenatedString|QuotedConcatenatedString) ';' )
		| ( 'reference' referenceList+=(ConcatenatedString|QuotedConcatenatedString) ';' )
		)*
	'}'
;

The check code is as follows. Note I don't pass the source as the API requires an EObject but the type is a String which isn't compatible. I do however pass the index.

@Check
    public void checkContainer(Container c) {
        if(c.getDescriptionList().size() > 1)
        {
        	for(int i=1;i<=c.getDescriptionList().size();i++)
        	{
        		error(ERROR_DESCRIPTION_MSG,MYPackage.Literals.CONTAINER__DESCRIPTION_LIST,i);
        	}	
        }
}

Thanks!
Ronan

Attachment: MultiLineError.png
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Re: Xtext Validation Error Markers [message #1726533 is a reply to message #1726527]

Mon, 14 March 2016 13:32

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

hi,

what happens if you use

error(String message, EObject source, EStructuralFeature feature, int index)

then you should Keep in mind that index is Zero based. thus the <= is bad

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Xtext Validation Error Markers [message #1726537 is a reply to message #1726533]

Mon, 14 March 2016 14:06

Ronan B

Messages: 273
Registered: July 2009

Senior Member

Hi Christian,
Aha it was actually my incorrect usage of the max index that caused the error marking to show up wrong. I start the loop at 1 as the first element can never cause the error and then forgot it was actually 0 based. I made your suggested change and it works perfectly.

for(int i=1;i<c.getDescriptionList().size();i++)
{
      error(ERROR_DESCRIPTION_MSG,MYPackage.Literals.CONTAINER__DESCRIPTION_LIST,i);
}

Thanks!
Ronan

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