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import scala.language.dynamics
import scala.reflect.{ ClassTag, classTag }
object Util {
def show[T](x: T): T = { println(x) ; x }
def mkArgs(xs: Any*) = xs map { case ((k, v)) => k + "=" + v ; case x => "" + x } mkString ("(", ", ", ")")
}
import Util._
abstract class MonoDynamic extends Dynamic {
def selectDynamic(name: String): String = show(this + "." + name)
def applyDynamic(name: String)(args: Any*): String = show(this + "." + name + mkArgs(args: _*))
def applyDynamicNamed(name: String)(args: (String, Any)*): String = show(this + "." + name + mkArgs(args: _*))
override def toString = (this.getClass.getName split '.').last
}
object Mono extends MonoDynamic {
def f(s: String): String = s
def f1 = this.bar()
def f2 = this.bar
def f3 = f(this.bar())
def f4 = f(this.bar)
def f5 = f(f(f(f(f(f(this.bar)))))) + f(f(f(f(f(f(this.baz))))))
def f6 = f(f(f(f(f(f(this.bar(bippy = 1, boppy = 2))))))) + f(f(f(f(f(f(this.baz))))))
}
object Poly extends Dynamic {
def selectDynamic[T: ClassTag](name: String): String = show(s"$this.$name[${classTag[T]}]")
def applyDynamic[T: ClassTag](name: String)(args: Any*): String = show(args.mkString(s"$this.$name[${classTag[T]}](", ", ", ")"))
def f(s: String): String = s
def f1 = this.bar
def f2 = this.bar[Int]
def f3 = this.bar()
def f4 = this.bar[Int]()
def f5 = this.bar[Int](1, 2, 3)
def f6 = f(f(this.bar))
def f7 = f(f(this.bar[Int]))
def f8 = f(f(this.bar()))
def f9 = f(f(this.bar[Int]()))
def f10 = f(f(this.bar[Int](1, 2, 3)))
override def toString = "Poly"
}
object Updating extends Dynamic {
def selectDynamic(name: String): String = show(s"$this.$name")
def updateDynamic(name: String)(value: Any): String = show(s"$this.$name = $value")
def f1 = this.bar
def f2 = this.bar = "b"
override def toString = "Updating"
}
object Nest1 extends Dynamic {
def applyDynamic(name: String)(args: Any*): Nest2.type = Nest2
object Nest2 extends Dynamic {
def applyDynamicNamed(name: String)(args: (String, Any)*): Nest3.type = Nest3
object Nest3 extends MonoDynamic {
}
}
def f1 = Nest1.bip().bop(foo = "bar").bippy(1, 2, 3)
def f2 = Nest1.bip("abc").bop(foo = 5).bippy
}
object Named extends Dynamic {
def applyDynamic(name: String)(args: Any*): Named.type = {
show(this + "." + name + mkArgs(args: _*))
this
}
def applyDynamicNamed(name: String)(args: (String, Any)*): Named.type = {
show(this + "." + name + mkArgs(args: _*))
this
}
def f1 = this.bippy(a = 1, b = 2).boppy(c = 3, d = 4)()()(e = 5, f = 6)
override def toString = "Named"
}
object Named2 extends Dynamic {
def applyDynamic(name: String)(a: Any)(b: Any = "b", c: Any = "c"): Named2.type = {
show(this + "." + name + mkArgs(a) + mkArgs(b, c))
this
}
def applyDynamicNamed(name: String)(a: (String, Any))(b: (String, Any), c: (String, Any)): Named2.type = {
show(this + "." + name + mkArgs(a) + mkArgs(b, c))
this
}
def f1 = this.bippy(1)(b = "q0")
def f2 = this.bippy(1)("q0")
def f3 = this.bippy(1)(c = "q0")
def f4 = this.bippy(1)("q0")
def f5 = this.bippy(1)(c = "b", b = "c")
def f6 = this.bippy(1)("b", "c")
def f7 = this.bippy(1)(b = "q0").bippy(2)()
def f8 = this.bippy(1)("q0").bippy(5)(c = "c").dingus(100)(c = "dong")
def f9 = this.bippy(1)(b = "q0", c = "q1").hello(100)("!!", "!!")
override def toString = "Named2"
}
object Test {
def main(args: Array[String]): Unit = {
{
import Mono._
f1 ; f2 ; f3 ; f4 ; f5
f6
}
{
import Poly._
f1 ; f2 ; f3 ; f4 ; f5
f6 ; f7 ; f8 ; f9 ; f10
}
{
import Updating._
f1 ; f2
}
{
import Nest1._
f1 ; f2
}
{
import Named._
f1
}
{
import Named2._
f1 ; f2 ; f3 ; f4 ; f5
f6 ; f7 ; f8 ; f9
}
}
}
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