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[EMFTVM] How do I call lazy rules? [message #1386234]

Sun, 15 June 2014 12:36

Eclipse User

In Eclipsepedia (http://wiki.eclipse.org/ATL/EMFTVM#Lazy_rules) it is said, that Quote:

lazy rules are not just invoked, but are also matched

What does it mean?

Let say I have simple metamodel like in the picture I've uploaded ( index.php/fa/18288/0/

).

Then I have ATL file like this:

-- @atlcompiler emftvm
-- @nsURI MM=example/metamodel1
-- @nsURI MM1=example/metamodel1

module One2One;
create OUT : MM1 from IN : MM;

lazy rule SE2SE {
	from
		s : MM!SubElement
	to
		t : MM1!SubElement(
			name <- s.name
			)
}

rule ClassA2ClassA {
	from
		s : MM!ClassA
	to
		t : MM1!ClassA(
			field1 <- s.field1
			)
	do {
		s.array->first()->debug();
		thisModule.SE2SE(s.array->first()).debug();
	}
}

But when I run this transformation I get

One:MM1!SubElement
OclUndefined

as if SE2SE lazy rule does not match (according to Eclipsopedia). What do I do wrong?

Thanks!

Attachment: mm.png
(Size: 4.09KB, Downloaded 407 times)

Re: [EMFTVM] How do I call lazy rules? [message #1386299 is a reply to message #1386234]

Mon, 16 June 2014 08:14

Eclipse User

Hello Maxim,

When you use lazy rule with EMFTVM machine, you must return the generated element in the lazy rule. Your rule must look like this:

lazy rule SE2SE {
	from
		s : MM!SubElement
	to
		t : MM1!SubElement(
			name <- s.name
			)
        do {
           t;
        }
}

[Updated on: Mon, 16 June 2014 08:14] by Moderator

Re: [EMFTVM] How do I call lazy rules? [message #1386514 is a reply to message #1386299]

Wed, 18 June 2014 00:43

Eclipse User

I see! Thank you!

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