Description Sven Efftinge 2011-12-12 03:38:38 EST

If a higher-order function is overloaded like this :

def foo (Function1<String,Boolean predicate) {
}

def foo(Predicate<String> predicate) { // the one from guava
}

It's not clear which one to invoke for the following expression:

foo( e | true )

The expression should therefore be marked as errorneous suggesting adding an explicit cast.
We could alternatively consider to have a higher precedence for Xbase's function types. Java8 might be a good source for deciding this.