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trait Quux extends Any
trait QuuxRef extends AnyRef
final class Bippy(val x: Any) extends AnyVal with Quux
object Foo {
def foo1[A <: Product](a: A) = { type X = a.type }
def foo2[A <: Product with Quux](a: A) = { type X = a.type }
def foo3(a: Product) = { type X = a.type }
def foo4(a: Product with Quux) = { type X = a.type }
def foo5(x: Quux with Product) = (x eq "abc") && ("abc" eq x)
def foo6(x: Quux with Product { def f: Int }) = (x eq "abc") && ("abc" eq x)
def foo7(x: Quux with Product { def eq(other: String): Boolean }) = (x eq "abc") && ("abc" eq x)
def ok1[A <: QuuxRef](a: A) = { type X = a.type }
def ok2[A <: Product with QuuxRef](a: A) = { type X = a.type }
def ok3(a: QuuxRef) = { type X = a.type }
def ok4(a: Product with QuuxRef) = { type X = a.type }
def ok5(x: QuuxRef with Product) = (x eq "abc") && ("abc" eq x)
def ok6(x: QuuxRef with Product { def f: Int }) = (x eq "abc") && ("abc" eq x)
def ok7(x: QuuxRef { def eq(other: String): Boolean }) = (x eq "abc") && ("abc" eq x)
def bad1(x: Bippy, y: Bippy) = x eq y
}
object Bar {
def f(x: Quux { def g(x: Int): Int }): Int = x g 5
f(new Quux { def g(x: String) = x })
f(new Quux { def g(x: Int) = x })
}
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