1 files changed, 0 insertions, 143 deletions
diff --git a/tests/untried/pos/tcpoly_seq_typealias.scala b/tests/untried/pos/tcpoly_seq_typealias.scala
deleted file mode 100644
index 8d2f6e7c3..000000000
--- a/tests/untried/pos/tcpoly_seq_typealias.scala
+++ /dev/null
@@ -1,143 +0,0 @@
-package examples.tcpoly.collection
-
-trait HOSeq {
-  // an internal interface that encapsulates the accumulation of elements (of type elT) to produce
-  // a structure of type coll[elT] -- different kinds of collections should provide different implicit
-  // values implementing this interface, in order to provide more performant ways of building that structure
-  trait Accumulator[+coll[x], elT] {
-    def += (el: elT): Unit
-    def result: coll[elT]
-  }
-
-
-  // Iterable abstracts over the type of its structure as well as its elements (see PolyP's Bifunctor)
-  // m[x] is intentionally unbounded: fold can then be defined nicely
-  // variance: if we write m[+x] instead of +m[+x], x is an invariant position because its enclosing type
-  //           is an invariant position -- should probably rule that out?
-  trait Iterable[+t] {
-    type m[+x]
-
-    //def unit[a](orig: a): m[a]
-    def iterator: Iterator[t]
-
-    // construct an empty accumulator that will produce the same structure as this iterable, with elements of type t
-    def accumulator[t]: Accumulator[m, t]
-
-    def filter(p: t => Boolean): m[t] = {
-      val buf = accumulator[t]
-      val elems = iterator
-      while (elems.hasNext) { val x = elems.next; if (p(x)) buf += x }
-      buf.result
-    }
-
-    def map[s](f: t => s): m[s] = {
-      val buf = accumulator[s]
-      val elems = iterator
-      while (elems.hasNext) buf += f(elems.next)
-      buf.result
-    }
-
-    // flatMap is a more specialized map, it only works if the mapped function produces Iterable values,
-    // which are then added to the result one by one
-    // the compiler should be able to find the right accumulator (implicit buf) to build the result
-    // to get concat, resColl = SingletonIterable, f = unit for SingletonIterable
-    def flatMap[resColl[+x] <: Iterable[x], s](f: t => resColl[s])(implicit buf: Accumulator[resColl, s]): resColl[s] = {
-        // TODO:  would a viewbound for resColl[x] be better?
-        // -- 2nd-order type params are not yet in scope in view bound
-      val elems = iterator
-      while (elems.hasNext) {
-        val elemss: Iterator[s] = f(elems.next).iterator
-        while (elemss.hasNext) buf += elemss.next
-      }
-      buf.result
-    }
-  }
-
-  final class ListBuffer[A] {
-    private var start: List[A] = Nil
-    private var last: ::[A] = _
-    private var exported: Boolean = false
-
-    /** Appends a single element to this buffer.
-     *
-     *  @param x  the element to append.
-     */
-    def += (x: A): Unit = {
-      if (exported) copy
-      if (start.isEmpty) {
-        last = new HOSeq.this.:: (x, Nil)
-        start = last
-      } else {
-        val last1 = last
-        last = new HOSeq.this.:: (x, null) // hack: ::'s tail will actually be last
-        //last1.tl = last
-      }
-    }
-
-    /** Converts this buffer to a list
-     */
-    def toList: List[A] = {
-      exported = !start.isEmpty
-      start
-    }
-
-    /** Clears the buffer contents.
-     */
-    def clear: Unit = {
-      start = Nil
-      exported = false
-    }
-
-    /** Copy contents of this buffer */
-    private def copy: Unit = {
-      var cursor = start
-      val limit = last.tail
-      clear
-      while (cursor ne limit) {
-        this += cursor.head
-        cursor = cursor.tail
-      }
-    }
-  }
-
-  implicit def listAccumulator[elT]: Accumulator[List, elT] = new Accumulator[List, elT] {
-    private[this] val buff = new ListBuffer[elT]
-    def += (el: elT): Unit = buff += el
-    def result: List[elT] = buff.toList
-  }
-
-  trait List[+t] extends Iterable[t] {
-    type m[+x] = List[x]
-
-    def head: t
-    def tail: List[t]
-    def isEmpty: Boolean
-    def iterator: Iterator[t] = new Iterator[t] {
-      var these = List.this
-      def hasNext: Boolean = !these.isEmpty
-      def next: t =
-        if (!hasNext)
-          throw new NoSuchElementException("next on empty Iterator")
-        else {
-          val result = these.head; these = these.tail; result
-        }
-    }
-    // construct an empty accumulator that will produce the same structure as this iterable, with elements of type t
-    def accumulator[t]: Accumulator[List, t] = listAccumulator[t]
-  }
-
-  // TODO: the var tl approach does not seem to work because subtyping isn't fully working yet
-  final case class ::[+b](hd: b, private val tl: List[b]) extends List[b] {
-    def head = hd
-    def tail = if(tl==null) this else tl // hack
-    override def isEmpty: Boolean = false
-  }
-
-  case object Nil extends List[Nothing] {
-    def isEmpty = true
-    def head: Nothing =
-      throw new NoSuchElementException("head of empty list")
-    def tail: List[Nothing] =
-      throw new NoSuchElementException("tail of empty list")
-  }
-}