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What's the meaning of the operator "row" (=>) in Xtext? [message #789638]

Fri, 03 February 2012 08:11

kisito Missing name

Messages: 16
Registered: November 2011

Junior Member

Hi
Look this example taken from Xbase.text

XCastedExpression returns XExpression:
	XMemberFeatureCall (=>({XCastedExpression.target=current} 'as') type=JvmTypeReference)*
;

i don't understand this rule because i don't see anywhere a documentation explaining the meaning of the operator "row" (=>)

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Re: What's the meaning of the operator "row" (=>) in Xtext? [message #789647 is a reply to message #789638]

Fri, 03 February 2012 08:24

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi, this is a Syntactic Predicate. Regards Christian

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

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Re: What's the meaning of the operator "row" (=>) in Xtext? [message #789664 is a reply to message #789647]

Fri, 03 February 2012 08:47

kisito Missing name

Messages: 16
Registered: November 2011

Junior Member

Thank's Christian

But for me the term "Syntatic predicate" is not more clear. How to have more explanation or a link where it's documented?
Best regard

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Re: What's the meaning of the operator "row" (=>) in Xtext? [message #789677 is a reply to message #789664]

Fri, 03 February 2012 09:02

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

http://dslmeinte.wordpress.com/2011/12/05/using-syntactic-predicates-in-xtext-part-1/

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

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Re: What's the meaning of the operator "row" (=>) in Xtext? [message #790520 is a reply to message #789638]

Sat, 04 February 2012 11:30

Sebastian Zarnekow

Messages: 3118
Registered: July 2009

Senior Member

It's in the docs:

http://www.eclipse.org/Xtext/documentation/2_1_0/020-grammar-language.php#antlr_errors

Regards,
Sebastian
--
Need professional support for Eclipse Modeling?
Go visit: http://xtext.itemis.com

Am 03.02.12 09:11, schrieb kisito Mising name:
> Hi
> Look this example taken from Xbase.text
>
> XCastedExpression returns XExpression:
> XMemberFeatureCall (=>({XCastedExpression.target=current} 'as')
> type=JvmTypeReference)*
> ;
>
>
> i don't understand this rule because i don't see anywhere a
> documentation explaining the meaning of the operator "row" (=>)
>

Report message to a moderator

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