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[Acceleo] How to avoid generating lines with only whitespace [message #1754418]

Fri, 17 February 2017 14:10

Elie Richa

Messages: 72
Registered: February 2016

Member

Hi,

The indentation rules of Acceleo lead to lines being generated with only whitespace characters in them. Consider the following

[template tmpl1(obj : OclAny)]
Unindented line.
   [obj.tmpl2()/]
Unindented line.
[/template]

[template tmpl2(obj : OclAny)]
This line will be indented because the above call was indented.

Another line that will also be indented.
[/template]

The empty line in tmpl2 will also be indented. As a result the output file will contain a line with only spaces.

Is there a way to avoid that? Can Acceleo's engine take care of that?

I'm thinking of a workaround of registering a generation listener to store a list of generated files, then iterating them in Java to clear lines containing only whitespace.

Any other suggestions?

Thanks,
Elie

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Re: [Acceleo] How to avoid generating lines with only whitespace [message #1754470 is a reply to message #1754418]

Sat, 18 February 2017 07:46

Ed Willink

Messages: 7635
Registered: July 2009

Senior Member

Hi

IIRC the Acceleo documentation offers some sensible advice that non-trivial whitespace formatting be treated as a separate concern in a separate 'tool'.

However if you use unnatural formatting such as no new line before [/template] you can get quite close to what you need. Every new-line comes from somewhere, so just get rid of the source.

Regards

Ed Willink

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