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[Acceleo] 'If' on an Iterate loop [message #501304]

Tue, 01 December 2009 14:31

Eclipse User

hi

Is it possible to use an 'if' expression on a iterate loop?

I've saw this expression on OMG OCL documentation (page 145)...
result = self->iterate( elem; acc : Integer = 0 | if elem = object then acc + 1 else acc endif)

... and have tried to used the expression below:
[query hasList(m : MetaComponent) : Boolean =
m.relationship->iterate(item; res : Boolean = false | if item.highCardinalitie <> 1 then true endif ) /]

This expression has this error: 'then unexpected token'.
Is the sintax incorrect? Is there any other way to obtain this result?

Another question: is there any command similar to java 'Break', used to terminate a loop?

thanks

Re: [Acceleo] 'If' on an Iterate loop [message #501413 is a reply to message #501304]

Wed, 02 December 2009 04:07

Eclipse User

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Andre,

OCL if's need their "else" defined or else are incorrect, though the
error message they return doesn't make it clear.

m.relationship->iterate(item; res : Boolean = false | if
item.highCardinalitie <> 1 then true else false endif )

would see the if compile, though I don't really understand your need
here. As for a break, there is none in OCL. You should use

m.relationship->any(item | item.highCardinalitie <> 1 )

if you wish to check that at least one element of the list verifies the
condition.

Laurent Goubet
Obeo

Andre wrote:
> hi
>
> Is it possible to use an 'if' expression on a iterate loop?
>
> I've saw this expression on OMG OCL documentation (page 145)... result =
> self->iterate( elem; acc : Integer = 0 | if elem = object then acc +
> 1 else acc endif)
>
> .. and have tried to used the expression below:
> [query hasList(m : MetaComponent) : Boolean =
> m.relationship->iterate(item; res : Boolean = false | if
> item.highCardinalitie <> 1 then true endif ) /]
>
> This expression has this error: 'then unexpected token'.
> Is the sintax incorrect? Is there any other way to obtain this result?
>
> Another question: is there any command similar to java 'Break', used to
> terminate a loop?
>
> thanks

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