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class A
class B extends A
class C {
def a(x: Int) = 1
def a(x: String) = 2
//def b(x: => Int)(s: String) = 1
//def b(x: => String)(a: Array[_]) = 2
def c(x: A) = 1
def c(x: B) = 2
//def d(x: => A)(s: String) = 1
//def d(x: => B)(a: Array[_]) = 2
def e(x: A) = 1
def e(x: B = new B) = 2
def f(x: Int) = 1
def f(x: String) = 2
def f(x: Long) = 3
def f(x: Double) = 4
}
object Test extends App {
val cm = reflect.runtime.currentMirror
val u = cm.universe
val c = new C
val im = cm.reflect(c)
def invoke(s: String, arg: Any, argType: u.Type): Int = {
val ol = u.typeOf[C] member u.newTermName(s) asTermSymbol
val methodSym = ol.resolveOverloaded(posVargs = List(argType)) asMethodSymbol
val sig = methodSym.typeSignature.asInstanceOf[u.MethodType]
val method = im.reflectMethod(methodSym)
if (sig.resultType.kind == "MethodType") method(arg, null).asInstanceOf[Int]
else method(arg).asInstanceOf[Int]
}
assert(c.a(1) == invoke("a", 1, u.typeOf[Int]))
assert(c.a("a") == invoke("a", "a", u.typeOf[String]))
assert(c.a('a') == invoke("a", 'a', u.typeOf[Char]))
assert(c.a(3: Byte) == invoke("a", 3: Byte, u.typeOf[Byte]))
//assert(c.b(1)(null) == invoke("b", 1, u.typeOf[Int]))
//assert(c.b("a")(null) == invoke("b", "a", u.typeOf[String]))
assert(c.c(new A) == invoke("c", new A, u.typeOf[A]))
assert(c.c(new B) == invoke("c", new B, u.typeOf[B]))
//assert(c.d(new A)(null) == invoke("d", new A, u.typeOf[A]))
//assert(c.d(new B)(null) == invoke("d", new B, u.typeOf[B]))
assert(c.e(new A) == invoke("e", new A, u.typeOf[A]))
assert(c.e(new B) == invoke("e", new B, u.typeOf[B]))
assert(c.f(1: Short) == invoke("f", 1: Short, u.typeOf[Short]))
assert(c.f(2) == invoke("f", 2, u.typeOf[Int]))
assert(c.f(3L) == invoke("f", 3L, u.typeOf[Long]))
assert(c.f(4f) == invoke("f", 4f, u.typeOf[Float]))
assert(c.f(5d) == invoke("f", 5d, u.typeOf[Double]))
}
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