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Formatting conflict [message #1868439]

Fri, 19 July 2024 13:07

Ralph Hummeling

Messages: 7
Registered: July 2024

Junior Member

I'm a bit puzzled by a

ConflictingFormattingException

while implementing formatting using Xtext 2.34.0:

!MESSAGE org.eclipse.xtext.util.ExceptionAcceptor - Conflicting Regions.
{{{}}}: newLine=2 at offset=286 length=1
[[[]]]: newLine=1-1-2 at offset=286 length=1

My interpretation is that the first region requires 2 new lines while the following region requires at least 1 new line but 2 new lines is the maximum. In this sense, placing 2 new lines between these regions would be the solution, right? Indeed, this is my intention.
So why is this exception thrown?

As can be seen, the first region has

append[setNewLine(2)]

while the following region has

prepend[setNewLines(1, 1, 2)]

Regards,
Ralph

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Re: Formatting conflict [message #1868442 is a reply to message #1868439]

Fri, 19 July 2024 13:22

Christian Dietrich

Messages: 14723
Registered: July 2009

Senior Member

as i have no idea can you provide a minimum reproducer?

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: Formatting conflict [message #1868445 is a reply to message #1868442]

Fri, 19 July 2024 13:41

Christian Dietrich

Messages: 14723
Registered: July 2009

Senior Member

(org.eclipse.xtext.formatting2.ConflictingFormattingException) org.eclipse.xtext.formatting2.ConflictingFormattingException: Conflicting values for 'newLineMin': '2' and '1'.

cannot tell you what the design considerations are for that

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

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Re: Formatting conflict [message #1868448 is a reply to message #1868445]

Fri, 19 July 2024 15:04

Ralph Hummeling

Messages: 7
Registered: July 2024

Junior Member

I can reproduce the issue in the Entities example from Bettini' book.
In the EntitiesFormatter.xtend file, just add a

prepend[newLine]

to the attribute at line 44:

 attribute.prepend[newLine].append[setNewLines(1, 1, 2)]

Three following sample.entities code will reproduce the exception:

entity MyFirstEntity {
    string s;
    int a;
}

[Updated on: Fri, 19 July 2024 15:10]

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Re: Formatting conflict [message #1868451 is a reply to message #1868448]

Fri, 19 July 2024 16:24

Christian Dietrich

Messages: 14723
Registered: July 2009

Senior Member

maybe you can workaround this using
some conditionally formatting.

if (! a after b) b.prepend ....

or if (a after b) set 2 to both otherwise ...

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de
Day Job: https://www.everest-systems.com

[Updated on: Fri, 19 July 2024 16:25]

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Re: Formatting conflict [message #1868457 is a reply to message #1868451]

Fri, 19 July 2024 18:16

Ralph Hummeling

Messages: 7
Registered: July 2024

Junior Member

You're right, of course I can find a workaround but in this case I think it might be a bug that needs to be reported.
I didn't look at the source code yet because I don't have time at the moment... unfortunately.

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