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Identity preservation in Xtend [message #1862521]

Fri, 08 December 2023 15:45

Kaan B. Y.

Messages: 15
Registered: June 2023

Junior Member

Hello,

I have the following if-block in a template method on `m`:

«FOR section : m.sections»
  // ...
  «FOR container : m.containers»
    «IF container.targetSection == s»
    // ...
    «ENDIF»
    // NOP, no container transformations for this section
  «ENDFOR»
  // ...
«ENDFOR»

I have noticed that the if condition is never met, although I can see that one of the sections in `m` occur as the `targetSection` of one of the containers in `m.containers` while debugging; `targetSection` is an EReference without containment, and there is additionally an assertion that checks if the `targetSection` already occurs in `m.sections` whilst populating `m.containers`. So I am sure that the if condition must be met for that one section... but it doesn't. I was wondering if Xtend is perhaps doing some clone operation internally, or perhaps if I should always assume that Xtend will not preserve identities and stick to `equals` instead of `==`.

Thanks in advance.

[Updated on: Fri, 08 December 2023 15:51]

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