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Xtext and left recursive [message #981724]

Mon, 12 November 2012 16:46

Tommaso De Sica

Messages: 131
Registered: March 2012
Location: Italy

Senior Member

Goodevening all,
today is my first day working with Xtext. I'm trying to write a small grammar and I've got a problem with Left Recursive in one of my Rule.

I have to define ArithmeticExpression, and I use this statement:

ArithmeticExpression:
	term1=ArithmeticExpression ArithmeticOperator term2=ArithmeticExpression | Term | '(' ArithmeticExpression ')'
;

Where

Term

is final (Varible or Constant).

How can I resolve it?

Very thank you for help. Smile

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Re: Xtext and left recursive [message #981726 is a reply to message #981724]

Mon, 12 November 2012 16:49

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

did you read http://blog.efftinge.de/2010/08/parsing-expressions-with-xtext.html

Regards
Christian

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Xtext and left recursive [message #985455 is a reply to message #981726]

Thu, 15 November 2012 12:07

Tommaso De Sica

Messages: 131
Registered: March 2012
Location: Italy

Senior Member

That's what I need!

Very thank you!

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