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https://issues.apache.org/jira/browse/GROOVY-12673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Scott Murphy Heiberg updated GROOVY-12673:
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Affects Version/s: 5.1.3
(was: 7.0.0-alpha-1)
> Closure wrappers (trampoline, memoize, curry, compose, asWritable) report the
> wrong delegate or thisObject and ignore delegate and resolveStrategy changes
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: GROOVY-12673
> URL: https://issues.apache.org/jira/browse/GROOVY-12673
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 4.0.33, 5.0.8, 5.1.3, 6.0.0
> Reporter: Scott Murphy Heiberg
> Priority: Major
>
> {code:groovy}
> class D { def m() { 'delegate' } }
> class O {
> def m() { 'owner' }
> def run() {
> def c = { x -> m() }
> assert c.curry(1).thisObject.is(this) // fails: null (also for
> c >> {...}, and c.asWritable().getThisObject())
> def t = c.trampoline()
> assert t.thisObject.is(this) // fails: the delegate
> of c
> t.resolveStrategy = Closure.DELEGATE_FIRST
> t.delegate = new D()
> assert t(1) == 'delegate' // fails: 'owner'
> def m = { x -> m() }.memoize()
> m.resolveStrategy = Closure.DELEGATE_FIRST
> m.delegate = new D()
> assert m(1) == 'delegate' // fails: 'owner'
> }
> }
> new O().run()
> {code}
> *Actual:* curried and composed closures report a null thisObject. A writable
> closure's getThisObject() returns null, so the property read under
> @CompileStatic gives null too. A trampolined closure reports the wrapped
> closure's delegate as its thisObject and its owner as its delegate. A
> memoized closure reports the owner as its delegate and null as its
> thisObject. Setting delegate or resolveStrategy on a trampolined or memoized
> closure has no effect on the call. {{c.asWritable().trampoline()}} also
> reports one Object[] parameter instead of the parameters of c.
> *Expected:* a wrapper reports the delegate, resolve strategy and thisObject
> of the closure it wraps, and setting delegate or resolveStrategy on it
> applies to that closure, as ComposedClosure and CurriedClosure already do for
> delegate and resolveStrategy.
> Cause: TrampolineClosure passes original.getDelegate() as thisObject, and
> neither TrampolineClosure nor Memoize.MemoizeFunction forwards the delegate
> and resolve strategy. CurriedClosure, ComposedClosure and WritableClosure do
> not forward getThisObject. TrampolineClosure reads the wrapped closure's
> parameter fields instead of its getters.
> Verified on 4.0.33, 5.0.8, 6.0.0 and master.
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