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https://issues.apache.org/jira/browse/GROOVY-4998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King updated GROOVY-4998:
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Fix Version/s: (was: 3.x)
4.x
> Real currying support
> ---------------------
>
> Key: GROOVY-4998
> URL: https://issues.apache.org/jira/browse/GROOVY-4998
> Project: Groovy
> Issue Type: New Feature
> Components: groovy-jdk
> Reporter: Kentaro Yoshida
> Priority: Major
> Fix For: 4.x
>
>
> Hi.
> Groovy's Closure have a name of method 'curry'.
> But this is not work for a real currying, it work as a partial function
> application.
> So, I wrote method of 'Real currying'.
> Referenced http://en.wikipedia.org/wiki/Currying
> {code}
> Closure add = {a, b, c -> a + b + c } // Closure of adding 3 arguments.
> assert add(1, 2, 3) == realCurry(add)(1)(2)(3)
> assert 6 == add(1, 2, 3)
> def curriedAdd = realCurry(add)
> def curriedAdd_1 = curriedAdd(1)
> def curriedAdd_1_2 = curriedAdd_1(2)
> def addResult = curriedAdd_1_2(3)
> assert 6 == addResult
> def realCurry(Closure clos) {
> if (clos.maximumNumberOfParameters >= 1) {
> return { x ->
> def cc = clos.curry(x)
> if (cc.maximumNumberOfParameters) realCurry(cc)
> else cc()
> }
> } else {
> return clos
> }
> }
> {code}
> (It's also published on gist https://gist.github.com/1193548)
> I hope this will be adopted to Groovy core.
> Thank you.
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