fun produceFun(): Function0<Unit> {
  return local fun <anonymous>() {
    return Unit
  }

}

fun testExtAsExt(fn: @ExtensionFunctionType Function1<Int, Unit>) {
  useSuspendExt(sfn = { // BLOCK
    local suspend fun @ExtensionFunctionType Function1<Int, Unit>.suspendConversion0(p0: Int) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun testExtAsExtT(fn: @ExtensionFunctionType Function1<Int, Unit>) {
  useSuspendExtT<Int>(sfn = { // BLOCK
    local suspend fun @ExtensionFunctionType Function1<Int, Unit>.suspendConversion0(p0: Int) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun testExtAsSimple(fn: @ExtensionFunctionType Function1<Int, Unit>) {
  useSuspendArg(sfn = { // BLOCK
    local suspend fun Function1<Int, Unit>.suspendConversion0(p0: Int) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun testExtAsSimpleT(fn: @ExtensionFunctionType Function1<Int, Unit>) {
  useSuspendArgT<Int>(sfn = { // BLOCK
    local suspend fun Function1<Int, Unit>.suspendConversion0(p0: Int) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun <S : Any?> testExtSAsExtT(fn: @ExtensionFunctionType Function1<S, Unit>) {
  useSuspendExtT<S>(sfn = { // BLOCK
    local suspend fun @ExtensionFunctionType Function1<S, Unit>.suspendConversion0(p0: S) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun <S : Any?> testExtSAsSimpleT(fn: @ExtensionFunctionType Function1<S, Unit>) {
  useSuspendArgT<S>(sfn = { // BLOCK
    local suspend fun Function1<S, Unit>.suspendConversion0(p0: S) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun <T> testIntersectionVsSuspendConversion(x: T) where T : Function0<Unit>, T : SuspendFunction0<Unit> {
  useSuspend(sfn = x)
}

fun testSimple(fn: Function0<Unit>) {
  useSuspend(sfn = { // BLOCK
    local suspend fun Function0<Unit>.suspendConversion0() {
      callee.invoke()
    }

    fn::suspendConversion0
  })
}

fun testSimpleAsExt(fn: Function1<Int, Unit>) {
  useSuspendExt(sfn = { // BLOCK
    local suspend fun @ExtensionFunctionType Function1<Int, Unit>.suspendConversion0(p0: Int) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun testSimpleAsExtT(fn: Function1<Int, Unit>) {
  useSuspendExtT<Int>(sfn = { // BLOCK
    local suspend fun @ExtensionFunctionType Function1<Int, Unit>.suspendConversion0(p0: Int) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun testSimpleAsSimpleT(fn: Function1<Int, Unit>) {
  useSuspendArgT<Int>(sfn = { // BLOCK
    local suspend fun Function1<Int, Unit>.suspendConversion0(p0: Int) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun testSimpleNonVal() {
  useSuspend(sfn = { // BLOCK
    local suspend fun Function0<Unit>.suspendConversion0() {
      callee.invoke()
    }

    produceFun()::suspendConversion0
  })
}

fun <S : Any?> testSimpleSAsExtT(fn: Function1<S, Unit>) {
  useSuspendExtT<S>(sfn = { // BLOCK
    local suspend fun @ExtensionFunctionType Function1<S, Unit>.suspendConversion0(p0: S) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun <S : Any?> testSimpleSAsSimpleT(fn: Function1<S, Unit>) {
  useSuspendArgT<S>(sfn = { // BLOCK
    local suspend fun Function1<S, Unit>.suspendConversion0(p0: S) {
      callee.invoke(p1 = p0)
    }

    fn::suspendConversion0
  })
}

fun testSmartCastOnVarVsSuspendConversion(a: Function0<Unit>) {
  var b: Function0<Unit> = a
  b as SuspendFunction0<Unit> /*~> Unit */
  useSuspend(sfn = b /*as SuspendFunction0<Unit> */)
}

fun testSmartCastOnVarWithSuspendConversion(a: Any) {
  var b: Any = a
  b as Function0<Unit> /*~> Unit */
  useSuspend(sfn = { // BLOCK
    local suspend fun Function0<Unit>.suspendConversion0() {
      callee.invoke()
    }

    b /*as Function0<Unit> */::suspendConversion0
  })
}

fun testSmartCastVsSuspendConversion(a: Function0<Unit>) {
  a as SuspendFunction0<Unit> /*~> Unit */
  useSuspend(sfn = a /*as SuspendFunction0<Unit> */)
}

fun testSmartCastWithSuspendConversion(a: Any) {
  a as Function0<Unit> /*~> Unit */
  useSuspend(sfn = { // BLOCK
    local suspend fun Function0<Unit>.suspendConversion0() {
      callee.invoke()
    }

    a /*as Function0<Unit> */::suspendConversion0
  })
}

fun useSuspend(sfn: SuspendFunction0<Unit>) {
}

fun useSuspendArg(sfn: SuspendFunction1<Int, Unit>) {
}

fun <T : Any?> useSuspendArgT(sfn: SuspendFunction1<T, Unit>) {
}

fun useSuspendExt(sfn: @ExtensionFunctionType SuspendFunction1<Int, Unit>) {
}

fun <T : Any?> useSuspendExtT(sfn: @ExtensionFunctionType SuspendFunction1<T, Unit>) {
}