"Unused import" incorrectly triggered if import is used implicitly

[xenomachina]

Suppose I have an extension method that adds an iterator to some type:

operator fun <T> Foo<T>?.iterator() {
    ...
}

In another package, I want to iterate using this in a for loop:

import com.example.foo.iterator
...
val foo : Foo = ...

for (x in foo) {
    ...
}

With the import the code compiles and works, but ktlint fails with an "Unused import" error.

Without the import, the Kotlin compiler fails with "Error:(...) Kotlin: For-loop range must have an 'iterator()' method").

This probably happens with other operator extension functions that are called implicitly, though I haven't tested.

[shyiko]

@xenomachina Thank you. I'll take care of it after work.

[shyiko]

Fixed in 0.6.2 🎉