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[Acceleo3] for loop over collection [message #656973]

Tue, 01 March 2011 08:44

Wilbert Alberts

Messages: 212
Registered: June 2010

Senior Member

Hi,

According to the MOF Model to Text Transformation
Language, v1.0 standard, I should be able to avoid writing a for loop by invoking a template on a collection.

So assume I defined:

[template genFoo(p: Foo)]
foo
[/template]

and suppose that 's' represents a collection of Foo. Then,

[genFoo(s)/]

should result in invocation of genFoo for each element of 's' if I'm right.

It seems to me that this is not (yet) implemented in Acceleo or am I doing something wrong?

Greetings,
Wilbert

PS: from the standard:

8.1.10 TemplateInvocation
A template invocation specifies one or more invocations of a template. An argument of a template invocation is specified
by an expression that could evaluate either to a single value or a set of values. The rules for determining which template
to invoke and how many times are as follows:

The types of arguments should match the types of the corresponding parameters. An argument type matches the parameter type when the latter is either the same type or a super type. If the argument is a set and the parameter is a singleton, then the template is invoked for each member of the set.

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Re: [Acceleo3] for loop over collection [message #656985 is a reply to message #656973]

Tue, 01 March 2011 09:30

Stephane Begaudeau

Messages: 458
Registered: April 2010
Location: Nantes (France)

Senior Member

Hi Wilbert,

In your case, you should use this syntax: [s.genFoo()/].
The syntax "[genFoo(s)/]" is not supported for a collection if the template/query does not apply to a collection.

Stephane Begaudeau, Obeo

--
Twitter: @sbegaudeau
Acceleo wiki: http://wiki.eclipse.org/Acceleo
Blogs: http://stephanebegaudeau.tumblr.com & http://sbegaudeau.tumblr.com

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