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object Test extends App {
import reflect.runtime._, universe._
class C { def f(i: Int, j: => Int) = i + j }
class V(val v: Int) extends AnyVal { def doubled = 2 * v }
class D { def f(i: Int, j: V) = i + j.doubled }
class E(i: Int, j: V)
locally {
val ms = typeOf[C].member(TermName("f")).asMethod
val im = currentMirror reflect (new C)
val mm = im reflectMethod ms
assert(mm(2,3) == 5)
}
locally {
val ms = typeOf[D].member(TermName("f")).asMethod
val im = currentMirror reflect (new D)
val mm = im reflectMethod ms
assert(mm(2, new V(3)) == 8)
}
locally {
val ms = typeOf[E].typeSymbol.asClass.primaryConstructor
val cm = currentMirror reflectClass typeOf[E].typeSymbol.asClass
val mm = cm reflectConstructor ms.asMethod
assert(mm(42, new V(7)).isInstanceOf[E])
}
}
/* Session tests without special init code should reside in simple script files.
* Also, provide filters such as for `(bound to C@74f7d1d2)`.
import scala.tools.partest.SessionTest
object Test extends SessionTest {
//Welcome to Scala version 2.11.6 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_40).
def session =
s"""|Type in expressions to have them evaluated.
|Type :help for more information.
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|scala> import reflect.runtime._, universe._
|import reflect.runtime._
|import universe._
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|scala> class C { def f(i: Int, j: => Int) = i + j }
|defined class C
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|scala> typeOf[C].member(TermName("f"))
|res0: reflect.runtime.universe.Symbol = method f
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|scala> .asMethod
|res1: reflect.runtime.universe.MethodSymbol = method f
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|scala> currentMirror reflect (new C)
|res2: reflect.runtime.universe.InstanceMirror = instance mirror for C@74f7d1d2
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|scala> res2 reflectMethod res1
|res3: reflect.runtime.universe.MethodMirror = method mirror for def f(i: scala.Int,j: => scala.Int): scala.Int (bound to C@74f7d1d2)
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|scala> res3(2,3)
|res4: Any = 5
|
|scala> :quit"""
}
*/
/* was:
scala> res3(2,3)
java.lang.IllegalArgumentException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at scala.reflect.runtime.JavaMirrors$JavaMirror$JavaMethodMirror.jinvokeraw(JavaMirrors.scala:335)
at scala.reflect.runtime.JavaMirrors$JavaMirror$JavaMethodMirror.jinvoke(JavaMirrors.scala:339)
at scala.reflect.runtime.JavaMirrors$JavaMirror$JavaTransformingMethodMirror.apply(JavaMirrors.scala:436)
... 33 elided
*/
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