Eclipse Community Forums: TMF (Xtext)

Home » Modeling » TMF (Xtext) » Yacc to Xtext(Conversion from Yacc to Xtext)

Tue, 10 December 2019 01:13

Eclipse User

Hi,

I have a Yacc file, where grammar rules are written.
I want to create a Xtext file with similar rules.
Is there any conversion tool / Script available ? I want to reduce the manual effort writing rules again in Xtext format.

Please guide me.

Thanks and regards,
Virag

Re: Yacc to Xtext [message #1818193 is a reply to message #1818192]

Tue, 10 December 2019 01:31

Eclipse User

I don't know any tool
And LL vs LALR as internals of antlr vs yacc
Nay give you some trouble

Re: Yacc to Xtext [message #1818194 is a reply to message #1818193]

Tue, 10 December 2019 01:33

Eclipse User

See also previous discussion in https://www.eclipse.org/forums/index.php/t/1068674/

Re: Yacc to Xtext [message #1818203 is a reply to message #1818194]

Tue, 10 December 2019 03:29

Eclipse User

Hi

Xtext is much much more than yacc [1]. The ability to integrate with an EMF model and so autogenerate an editor is very very powerful. Unless you have a 100 yacc grammars to migrate to Xtext and so can justify the effort of developing an analyzer for yacc actions, I recommend just cutting and pasting, probably starting with the smallest subset of the grammar that can be useful to gain confidence before expanding to more and more and rewriting the left recursions as * repeats.

Regards

Ed Willink

[1] Although for grammar checking I prefer 'yacc' or rather LPG and sometimes use GIT\org.eclipse.ocl\examples\org.eclipse.ocl.examples.xtext2lpg to check my Xtext grammars.

Re: Yacc to Xtext [message #1818208 is a reply to message #1818193]

Tue, 10 December 2019 04:42

Eclipse User

Thanks. Mr. Christian Dietrich.
I will try to do this manually.

Re: Yacc to Xtext [message #1818209 is a reply to message #1818194]

Tue, 10 December 2019 04:43

Eclipse User

Thanks for the link Mr. Tamas Miklossy.

Re: Yacc to Xtext [message #1818210 is a reply to message #1818203]

Tue, 10 December 2019 04:44

Eclipse User

Thanks for the pointer Mr. Ed Willink.
I will try to migrate manually.
I will ask in forum, if I face any issues.