groovy - 替换 'this' 在 Groovy 中调用方法引用

Question

当引用是从实例中获取时，调用非静态方法引用很容易:

class Foo { void funk() { println "okay!" } }
Foo foo = new Foo()
Closure closure = foo.&funk
closure() // okay! is printed

但是如何替换 this什么时候从类中获取方法引用？

class Foo { void funk() { println "okay!" } }
Foo foo = new Foo()
Closure closure = Foo.&funk
// closure.delegate = foo // not helpful
closure()
// => java.lang.IllegalArgumentException: object is not an instance of declaring class

Answer 1

以下解决您的问题:

class Foo { void funk() { println "okay!" } }
Closure closure = { Foo.&funk.rehydrate(delegate, it, it).call() }
Foo foo = new Foo()
closure(foo)