remove unused code, fix warnings

Author: SethTisue

build.sbt

@@ -23,7 +23,8 @@ def osgiExport(scalaVersion: String, version: String) = {
 
 lazy val commonSettings = Seq(
   organization := "org.scala-lang.modules",
-  version := "0.9.0-SNAPSHOT"
+  version := "0.9.0-SNAPSHOT",
+  scalacOptions ++= Seq("-feature", "-deprecation", "-unchecked")
 )
 
 lazy val fnGen = (project in file("fnGen")).

fnGen/WrapFnGen.scala

@@ -14,7 +14,6 @@ object WrapFnGen {
   val packaging = "package scala.compat.java8"
 
   import scala.tools.nsc._
-  import scala.reflect.internal._
   val settings = new Settings(msg => sys.error(msg))
   settings.usejavacp.value = true
   val compiler = new Global(settings)
@@ -59,12 +58,12 @@ object WrapFnGen {
   }
 
   implicit class SplitMyLinesAndStuff(s: String) {
-    def toVec = s.linesIterator.toVector
+    def toVec = s.lines.toVector
     def nonBlank = s.trim.length > 0
   }
 
   implicit class TreeToText(t: Tree) {
-    def text = showCode(t).replace("$", "").linesIterator.toVector
+    def text = showCode(t).replace("$", "").lines.toVector
   }
 
   case class Prioritized(lines: Vector[String], priority: Int) {
@@ -253,7 +252,6 @@ object WrapFnGen {
             q"""@inline implicit def $s2jImpN[..$scalafnTdefs](sf: $scalaType[..$scalafnTnames])(implicit ..$evs): $s2jValCN[..$tnParams] =
               new $s2jValCN[..$tnParams](sf.asInstanceOf[$scalaType[..$scalaTargs]])
             """
-          val depth = numberedA.size
           (tree, tdParams.length)
         }
 
@@ -290,7 +288,7 @@ object WrapFnGen {
   def sameText(f: java.io.File, text: String): Boolean = {
     val x = scala.io.Source.fromFile(f)
     val lines = try { x.getLines.toVector } finally { x.close }
-    lines.iterator.filter(_.nonBlank) == text.linesIterator.filter(_.nonBlank)
+    lines.iterator.filter(_.nonBlank) == text.lines.filter(_.nonBlank)
   }
 
   def write(f: java.io.File, text: String) {

src/main/scala/scala/compat/java8/FutureConverters.scala

@@ -3,11 +3,12 @@
  */
 package scala.compat.java8
 
+import scala.language.implicitConversions
+
 import scala.concurrent.java8.FuturesConvertersImpl._
-import scala.concurrent.{ Future, Promise, ExecutionContext, ExecutionContextExecutorService, ExecutionContextExecutor, impl }
-import java.util.concurrent.{ CompletionStage, Executor, ExecutorService, CompletableFuture }
-import scala.util.{ Try, Success, Failure }
-import java.util.function.{ BiConsumer, Function ⇒ JF, Consumer, BiFunction }
+import scala.concurrent.{ Future, Promise, ExecutionContext, ExecutionContextExecutorService, ExecutionContextExecutor }
+import java.util.concurrent.{ CompletionStage, Executor, ExecutorService }
+import java.util.function.Consumer
 
 /**
  * This class contains static methods which convert between Java CompletionStage

src/main/scala/scala/compat/java8/OptionConverters.scala

@@ -3,7 +3,6 @@
  */
 package scala.compat.java8
 
-import language.implicitConversions
 import java.util.{Optional, OptionalDouble, OptionalInt, OptionalLong}
 
 /** This class enables bidirectional conversion between `scala.Option` and the

src/main/scala/scala/compat/java8/PrimitiveIteratorConversions.scala

@@ -3,7 +3,6 @@
  */
 package scala.compat.java8
 
-import language.implicitConversions
 import java.util.{ Iterator => JIterator, PrimitiveIterator }
 
 /** This class enables conversion from `scala.Iterator` to the set of

src/main/scala/scala/compat/java8/StreamConverters.scala

@@ -1,6 +1,6 @@
 package scala.compat.java8
 
-import language.implicitConversions
+import scala.language.higherKinds
 
 import java.util.stream._
 import scala.compat.java8.collectionImpl._

src/main/scala/scala/compat/java8/collectionImpl/Accumulator.scala

@@ -1,5 +1,7 @@
 package scala.compat.java8.collectionImpl
 
+import scala.language.higherKinds
+
 /** An `Accumulator` is a low-level collection specialized for gathering
   * elements in parallel and then joining them in order by merging Accumulators.
   * Accumulators can contain more than `Int.MaxValue` elements.
@@ -232,7 +234,7 @@ private[java8] class AccumulatorStepper[A](private val acc: Accumulator[A]) exte
   private var n = if (acc.hIndex > 0) acc.cumulative(0) else acc.index
   private var N = acc.totalSize
 
-  private def duplicateSelf(limit: Long = N): AccumulatorStepper[A] = {
+  private def duplicateSelf(limit: Long): AccumulatorStepper[A] = {
     val ans = new AccumulatorStepper(acc)
     ans.h = h
     ans.i = i
@@ -249,7 +251,7 @@ private[java8] class AccumulatorStepper[A](private val acc: Accumulator[A]) exte
     i = 0
   }
 
-  def characteristics = ORDERED | SIZED | SUBSIZED
+  def characteristics() = ORDERED | SIZED | SUBSIZED
 
   def estimateSize = N
 

src/main/scala/scala/compat/java8/collectionImpl/DoubleAccumulator.scala

@@ -1,5 +1,7 @@
 package scala.compat.java8.collectionImpl
 
+import scala.language.higherKinds
+
 /** A `DoubleAccumulator` is a low-level collection specialized for gathering
   * elements in parallel and then joining them in order by merging them.
   * This is a manually specialized variant of `Accumulator` with no actual
@@ -229,7 +231,7 @@ private[java8] class DoubleAccumulatorStepper(private val acc: DoubleAccumulator
   private var n = if (acc.hIndex > 0) acc.cumulative(0) else acc.index
   private var N = acc.totalSize
 
-  private def duplicateSelf(limit: Long = N): DoubleAccumulatorStepper = {
+  private def duplicateSelf(limit: Long): DoubleAccumulatorStepper = {
     val ans = new DoubleAccumulatorStepper(acc)
     ans.h = h
     ans.i = i
@@ -246,7 +248,7 @@ private[java8] class DoubleAccumulatorStepper(private val acc: DoubleAccumulator
     i = 0
   }
 
-  def characteristics = ORDERED | SIZED | SUBSIZED | NONNULL
+  def characteristics() = ORDERED | SIZED | SUBSIZED | NONNULL
 
   def estimateSize = N
 

src/main/scala/scala/compat/java8/collectionImpl/IntAccumulator.scala

@@ -1,5 +1,7 @@
 package scala.compat.java8.collectionImpl
 
+import scala.language.higherKinds
+
 /** A `IntAccumulator` is a low-level collection specialized for gathering
   * elements in parallel and then joining them in order by merging them.
   * This is a manually specialized variant of `Accumulator` with no actual
@@ -236,7 +238,7 @@ private[java8] class IntAccumulatorStepper(private val acc: IntAccumulator) exte
   private var n = if (acc.hIndex > 0) acc.cumulative(0) else acc.index
   private var N = acc.totalSize
 
-  private def duplicateSelf(limit: Long = N): IntAccumulatorStepper = {
+  private def duplicateSelf(limit: Long): IntAccumulatorStepper = {
     val ans = new IntAccumulatorStepper(acc)
     ans.h = h
     ans.i = i
@@ -253,7 +255,7 @@ private[java8] class IntAccumulatorStepper(private val acc: IntAccumulator) exte
     i = 0
   }
 
-  def characteristics = ORDERED | SIZED | SUBSIZED | NONNULL
+  def characteristics() = ORDERED | SIZED | SUBSIZED | NONNULL
 
   def estimateSize = N
 

src/main/scala/scala/compat/java8/collectionImpl/LongAccumulator.scala

@@ -1,5 +1,7 @@
 package scala.compat.java8.collectionImpl
 
+import scala.language.higherKinds
+
 /** A `LongAccumulator` is a low-level collection specialized for gathering
   * elements in parallel and then joining them in order by merging them.
   * This is a manually specialized variant of `Accumulator` with no actual
@@ -230,7 +232,7 @@ private[java8] class LongAccumulatorStepper(private val acc: LongAccumulator) ex
   private var n = if (acc.hIndex > 0) acc.cumulative(0) else acc.index
   private var N = acc.totalSize
 
-  private def duplicateSelf(limit: Long = N): LongAccumulatorStepper = {
+  private def duplicateSelf(limit: Long): LongAccumulatorStepper = {
     val ans = new LongAccumulatorStepper(acc)
     ans.h = h
     ans.i = i
@@ -247,7 +249,7 @@ private[java8] class LongAccumulatorStepper(private val acc: LongAccumulator) ex
     i = 0
   }
 
-  def characteristics = ORDERED | SIZED | SUBSIZED | NONNULL
+  def characteristics() = ORDERED | SIZED | SUBSIZED | NONNULL
 
   def estimateSize = N