/** * Tries to load a symbol for the `Foo$class` using Scala reflection. * Since trait implementation classes do not get pickling information * symbol for them should be created using fallback mechanism * that exposes Java reflection information dressed up in * a Scala symbol. */ object Test extends App with Outer { import scala.reflect.mirror assert(mirror.classToSymbol(classTag[Foo].erasure).typeSignature.declaration(mirror.newTermName("bar")).typeSignature == mirror.classToSymbol(classTag[Bar].erasure).typeSignature.declaration(mirror.newTermName("foo")).typeSignature) val s1 = implClass(classTag[Foo].erasure) assert(s1 != mirror.NoSymbol) assert(s1.typeSignature != mirror.NoType) assert(s1.companionSymbol.typeSignature != mirror.NoType) assert(s1.companionSymbol.typeSignature.declaration(mirror.newTermName("bar")) != mirror.NoSymbol) val s2 = implClass(classTag[Bar].erasure) assert(s2 != mirror.NoSymbol) assert(s2.typeSignature != mirror.NoType) assert(s2.companionSymbol.typeSignature != mirror.NoType) assert(s2.companionSymbol.typeSignature.declaration(mirror.newTermName("foo")) != mirror.NoSymbol) def implClass(clazz: Class[_]) = { val implClass = Class.forName(clazz.getName + "$class") mirror.classToSymbol(implClass) } } trait Foo { def bar = 1 } trait Outer { trait Bar { def foo = 1 } }