Moved ExampleSource into a separate file.

util/complete/src/main/scala/sbt/complete/ExampleSource.scala

@@ -0,0 +1,49 @@
+package sbt.complete
+
+import java.io.File
+
+/**
+ * These sources of examples are used in parsers for user input completion. An example of such a source is the
+ * [[sbt.complete.FileExamples]] class, which provides a list of suggested files to the user as they press the
+ * TAB key in the console.
+ */
+trait ExampleSource
+{
+  /**
+   * @return a (possibly lazy) list of completion example strings. These strings are continuations of user's input. The
+   *         user's input is incremented with calls to [[withAddedPrefix]].
+   */
+  def apply(): Iterable[String]
+
+  /**
+   * @param addedPrefix a string that just typed in by the user.
+   * @return a new source of only those examples that start with the string typed by the user so far (with addition of
+   *         the just added prefix).
+   */
+  def withAddedPrefix(addedPrefix: String): ExampleSource
+}
+
+/**
+ * Provides path completion examples based on files in the base directory.
+ * @param base the directory within which this class will search for completion examples.
+ * @param prefix the part of the path already written by the user.
+ */
+class FileExamples(base: File, prefix: String = "") extends ExampleSource {
+  private val relativizedPrefix: String = "." + File.separator + prefix
+
+  override def apply(): Iterable[String] = files(base).map(_.toString.substring(relativizedPrefix.length))
+
+  override def withAddedPrefix(addedPrefix: String): FileExamples = new FileExamples(base, prefix + addedPrefix)
+
+  protected def fileStartsWithPrefix(path: File): Boolean = path.toString.startsWith(relativizedPrefix)
+
+  protected def directoryStartsWithPrefix(path: File): Boolean = {
+    val pathString = path.toString
+    pathString.startsWith(relativizedPrefix) || relativizedPrefix.startsWith(pathString)
+  }
+
+  protected def files(directory: File): Iterable[File] = {
+    val (subDirectories, filesOnly) = directory.listFiles().toStream.partition(_.isDirectory)
+    filesOnly.filter(fileStartsWithPrefix) ++ subDirectories.filter(directoryStartsWithPrefix).flatMap(files)
+  }
+}

util/complete/src/main/scala/sbt/complete/Parser.scala

@@ -718,27 +718,6 @@ private final class Examples[T](delegate: Parser[T], fixed: Set[String]) extends
 			Completions(fixed map(f => Completion.suggestion(f)) )
 	override def toString = "examples(" + delegate + ", " + fixed.take(2) + ")"
 }
-
-/**
- * These sources of examples are used in parsers for user input completion. An example of such a source is the
- * [[sbt.complete.Parsers.FileExamples]] class, which provides a list of suggested files to the user as they press the
- * TAB key in the console.
- */
-abstract class ExampleSource
-{
-  /**
-   * @return a (possibly lazy) list of completion example strings. These strings are continuations of user's input. The
-   *         user's input is incremented with calls to [[withAddedPrefix]].
-   */
-	def apply(): Iterable[String]
-
-  /**
-   * @param addedPrefix a string that just typed in by the user.
-   * @return a new source of only those examples that start with the string typed by the user so far (with addition of
-   *         the just added prefix).
-   */
-	def withAddedPrefix(addedPrefix: String): ExampleSource
-}
 private final class DynamicExamples[T](delegate: Parser[T], exampleSource: ExampleSource, maxNumberOfExamples: Int) extends ValidParser[T]
 {
 	def derive(c: Char) = examples(delegate derive c, exampleSource.withAddedPrefix(c.toString), maxNumberOfExamples)

util/complete/src/main/scala/sbt/complete/Parsers.scala

@@ -128,31 +128,6 @@ trait Parsers
 	/** Returns true if `c` is an ASCII letter or digit. */
 	def alphanum(c: Char) = ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9')
 
-  /**
-   * Provides path completion examples based on files in the base directory.
-   * @param base the directory within which this class will search for completion examples.
-   * @param prefix the part of the path already written by the user.
-   */
-	class FileExamples(base: File, prefix: String = "") extends ExampleSource {
-		private val relativizedPrefix: String = "." + File.separator + prefix
-
-		override def apply(): Iterable[String] = files(base).map(_.toString.substring(relativizedPrefix.length))
-
-		override def withAddedPrefix(addedPrefix: String): FileExamples = new FileExamples(base, prefix + addedPrefix)
-
-		protected def fileStartsWithPrefix(path: File): Boolean = path.toString.startsWith(relativizedPrefix)
-
-		protected def directoryStartsWithPrefix(path: File): Boolean = {
-			val pathString = path.toString
-			pathString.startsWith(relativizedPrefix) || relativizedPrefix.startsWith(pathString)
-		}
-
-		protected def files(directory: File): Iterable[File] = {
-			val (subDirectories, filesOnly) = directory.listFiles().toStream.partition(_.isDirectory)
-			filesOnly.filter(fileStartsWithPrefix) ++ subDirectories.filter(directoryStartsWithPrefix).flatMap(files)
-		}
-	}
-
   /**
    * @param base the directory used for completion proposals (when the user presses the TAB key). Only paths under this
    *             directory will be proposed.