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[XCORE] how to create an EList in an operation [message #1265913]

Thu, 06 March 2014 13:39

Eclipse User

Hi,

I trying to write the following operation:

op ChannelDescription[] channels() {
	var ChannelDescription[]  channels
	for (Module module : modules) {
		channels.addAll(module.channelDescription)
	}
	return channels
}

This gives me a type mismatch error. And how do I create a List of ChannelDescriptions ? The purpose of this op is to flatten the module list and to return a list of all ChannelDescriptions from all modules.

Regards
Rpger

Re: [XCORE] how to create an EList in an operation [message #1265929 is a reply to message #1265913]

Thu, 06 March 2014 14:09

Eclipse User

Roger,

You can define a data type that wraps any existing Java type, e.g., type
List<E> wraps java.util.List. Xbase provides more elegant ways to
express this type of thing. Look at some of the nice Xtend examples
(becaue Xtend also uses Xbase)...

On 06/03/2014 7:39 PM, Roger Gilliar wrote:
> Hi,
>
> I trying to write the following operation:
>
> op ChannelDescription[] channels() {
> var ChannelDescription[] channels
> for (Module module : modules) {
> channels.addAll(module.channelDescription)
> }
> return channels
> }
>
> This gives me a type mismatch error. And how do I create a List of
> ChannelDescriptions ? The purpose of this op is to flatten the module
> list and to return a list of all ChannelDescriptions from all modules.
>
> Regards
> Rpger

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