add tests from scala/test/files/{pos,neg}

with explicit Unit return type

1 files changed, 42 insertions, 0 deletions

diff --git a/tests/untried/pos/viewtest1.scala b/tests/untried/pos/viewtest1.scala
new file mode 100644
index 000000000..38945ad2f
--- /dev/null
+++ b/tests/untried/pos/viewtest1.scala
@@ -0,0 +1,42 @@
+package test
+
+trait Ordered[a] {
+  def < (x: a): Boolean
+}
+
+object O {
+  implicit def view (x: String): Ordered[String] = new Ordered[String] {
+    def < (y: String) = x.compareTo(y) < 0
+  }
+}
+
+object Empty extends Tree[Nothing]
+case class Node[c <% Ordered[c]](elem: c, l: Tree[c], r: Tree[c]) extends Tree[c]
+
+abstract class Tree[+a <% Ordered[a]] {
+  def insert[b >: a <% Ordered[b]](x: b): Tree[b] = this match {
+    case Empty =>
+      new Node(x, Empty, Empty)
+    case Node(elem, l, r) =>
+      if (x == elem) this
+      else if (x < elem) Node(elem, l insert x, r)
+      else Node(elem, l, r insert x)
+  }
+  def elements: List[a] = this match {
+    case Empty => List()
+    case Node(elem, l, r) =>
+      l.elements ::: List(elem) ::: r.elements
+  }
+}
+
+object Test {
+  import O.view
+
+  def main(args: Array[String]): Unit = {
+    var t: Tree[String] = Empty
+    for (s <- args) {
+      t = t insert s
+    }
+    println(t.elements)
+  }
+}