[GROOVY-7950] AST transforms referencing properties on a class not detecting Trait-mixed in properties

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Information Provided
• Affects Version/s: 2.4.7
• Labels: trait traits
• Assignee: Eric Milles
• Reporter: Kamal Advani
• Created: 28/Sep/16 07:07
• Updated: 10/Feb/23 21:40
• Resolved: 22/Nov/22 20:17

Description

I can't find anything about this in http://docs.groovy-lang.org/next/html/documentation/core-traits.html – apologies if I missed it elsewhere. Also could not find a similar issue.

I am applying a transform that references properties in a class, the transformed class also implements a trait with properties. It seems that the trait transform is applied last, such that the annotation-driven AST transforms don't see 'inherited/mixed in' trait properties.

import groovy.transform.*

trait T {
    String s1
}

@TupleConstructor(includes='s1, s2') // only a constructor for s2 created, same applies to @EqualsAndHashCode for example.
// @Sortable(includes='s1, s2') //  Error during @Sortable processing: tried to include unknown property 's1'
class Bar implements T {
    String s2
}

This http://docs.groovy-lang.org/next/html/documentation/core-traits.html#_compatibility_with_ast_transformations talks about applying transforms on a trait itself, but as per above, this isn't what I'm doing.

Is this behaviour by design, or am I missing something obvious?

Thanks for your help.