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Preprocessing in XText [message #893422]

Wed, 04 July 2012 01:37

Eclipse User

Is there a way to integrate a preprocessor into XText editor?

I have a DSL which has macros and i need a preprocessor that can preprocess the file (expand macros and do other jobs) and also i need to integrate it into the editor. Is this possible ?

Re: Preprocessing in XText [message #893603 is a reply to message #893422]

Wed, 04 July 2012 15:28

Eclipse User

On 2012-03-07 22:37, Prajeet Mising name wrote:
> Is there a way to integrate a preprocessor into XText editor?
> I have a DSL which has macros and i need a preprocessor that can
> preprocess the file (expand macros and do other jobs) and also i need to
> integrate it into the editor. Is this possible ?

It is not impossible, but is difficult and requires a lot of work.
Various aspects of this has been discussed a number of times in this forum.

Regards
- henrik

Re: Preprocessing in XText [message #894471 is a reply to message #893603]

Mon, 09 July 2012 07:04

Eclipse User

Can you tell me what is a good starting point? I already got a preprocessor, so that is not an issue.

Re: Preprocessing in XText [message #894493 is a reply to message #894471]

Mon, 09 July 2012 08:34

Eclipse User

On 2012-09-07 13:04, Prajeet Mising name wrote:
> Can you tell me what is a good starting point? I already got a
> preprocessor, so that is not an issue.

The difficulty is that you want to edit the original text (unprocessed)
while the parser must operate on the processed stream.

Now you have several problems:
- Creating an input stream with the preprocessed content (the easiest part)
- Making the editor show unprocessed content only
- Handling errors in included / expanded logic
- Handle text based references (positions, lines etc. as they will be
different in processed and unprocessed text).
- Making builders react to changes in included logic
- Serializing the model (should only contain unprocessed content)
- You will probably also have to customize many features that otherwise
work out of the box - cross references becomes tricky, as well as
formatting.

This is a major undertaking and requires a good understanding of
Xtext/Eclipse.

Regards
- henrik

Re: Preprocessing in XText [message #894581 is a reply to message #894493]

Mon, 09 July 2012 13:00

Eclipse User

Righto

Thanks a lot man Smile

This is a lot of help!

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