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question about ATL [message #1847817]

Tue, 09 November 2021 08:17

Yanhong Dong

Messages: 25
Registered: September 2021

Junior Member

rule A2B{
from
s : A!element
to
t : B!element(
name <- s.own.name
if(not s.Behavior..oclIsUndefined) then
tm <- s.Behavior.re.tr -> select(e | not e.oclIsUndefined()),
a <- s.Behavior.re.sub -> select(e | not e.do.oclIsUndefined()),
)
}
rule E2T{
from
s : A!tr
to
t : B!Tran(
e <- s.name
)
}
rule E2A{
from
s : A!sub(not s.do.oclIsUndefined())
to
t : B!In(
ex <- s.name + s.do.name
)
}
I think this rule is right, but it also tell me Unable to access re on OclUndefined
so, can you tell me how to establish example

Attachment: file.xml
(Size: 0.25KB, Downloaded 66 times)

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Re: question about ATL [message #1847863 is a reply to message #1847817]

Wed, 10 November 2021 18:09

Dennis Wagelaar

Messages: 589
Registered: September 2012
Location: Belgium

Senior Member

Your code has syntax errors. I don't understand how you're able to compile and run it (see attachment).

Your syntax error is caused by embedding imperative ATL code in the "to" part of an ATL rule, which is not supported. There are two ways to solve this:

1. Declarative - create a new rule that inherits from A2B, and includes "not s.Behavior..oclIsUndefined" in the "from filter expression. Move the bindings of "tm" and "a" into the new rule.

2. Imperative - add a "do" section to the A2B rule and move the "if" block into that section.

Attachment: ElementTest.png
(Size: 127.26KB, Downloaded 60 times)

Cheers,
Dennis

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Re: question about ATL [message #1848007 is a reply to message #1847863]

Wed, 17 November 2021 11:13

Yanhong Dong

Messages: 25
Registered: September 2021

Junior Member

Thank you for your answer, I don't know why my code does not show errors, I suspect it is because of my editor problem (I use eclipse)
Your answer helped me a lot, I will try this method to solve my problem, thank you

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