Hi,

I'm putting together a EBNF like syntax [not strictly EBNF] for the Object Pascal grammar, as implemented by Free Pascal, using the {$mode objfpc} compiler mode.

I'm basing the work on FPC 2.6.2 (latest released compiler). The Object Pascal grammar starts at line 5374.

https://github.com/graemeg/fpGUI/blob/master/docs/fpc_lang_ref.ipf

Any input or corrections will be much appreciated.

Known omissions I must still add:

* Generics
* Type Helpers

Is there a wiki pages which lists all new language features and syntax for FPC 2.6.2?

Regards,
- Graeme -

If you base the work on 2.6.2 then type helpers don't apply (only record and class helpers). Regarding generic syntax not much has changed in mode objfpc since 2.6 was branched (only Delphi mode was improved and some bugs were squashed).

Is there a wiki pages which lists all new language features and syntax for FPC 2.6.2?

There didn't happen much: http://wiki.freepascal.org/FPC_New_Features_2.6.2

Regards,
Sven

Hm.

That looks dangerously much, almost verbatim, like the appendix A of the Delphi language guide as found in the D7 manual.

Michael.

Sven Barth wrote

> * Type Helpers If you base the work on 2.6.2 then type helpers don't apply (only record and class helpers).

Good to know, thanks.

Regarding generic syntax not much has changed in mode objfpc since 2.6 was branched (only Delphi mode was improved and some bugs were squashed).

OK. The original EBNF grammar was based on Delphi 7 & Kylix 3 language features. I have since modified it to whatever language syntax has changed and features added for the last few FPC releases. So I'm not strictly comparing only changes between 2.6.0 and 2.6.2. I am looking at earlier FPC versions too.

There didn't happen much: http://wiki.freepascal.org/FPC_New_Features_2.6.2

Thanks for that. I also found the page for 2.6.0, so that will help me a lot.

Regards,
- Graeme -

Michael Van Canneyt wrote

That looks dangerously much, almost verbatim, like the appendix A of the Delphi language guide as found in the D7 manual.

Umm, I don't have the Delphi manuals, but I do have the Kylix 3 manuals. I see what you mean. I didn't copy it from the Kylix 3 manual though, I got it from the following URL:

http://delphi.wikia.com/wiki/Object_Pascal_Grammar

Would it make a difference though? EBNF for a language grammar should be pretty much identical to any other EBNF of the same language. The order of the definitions might change slightly, but the language grammar would still be the same.

Regards,
- Graeme -

Just curious how your efforts turned out?

Kenneth Cochran wrote

Just curious how your efforts turned out?

Not much changed since that post. I've made notes [thanks to the wiki links] of what I still have missing.

The latest Language Reference doc can be downloaded in INF format (viewable with DocView - also downloadable) from this URL:

http://sourceforge.net/projects/fpgui/files/fpGUI/Documentation/docs_2013-04-20.zip/download

Regards,
- Graeme -