Some tests

Author: odersky

tests/neg/empty-given.scala

@@ -0,0 +1,3 @@
+given {
+  def foo = 1  // error
+}

tests/pending/neg/i7445.scala

@@ -0,0 +1,8 @@
+object Main {
+  type O1[A] = {
+    type OutInner[X] = Unit
+    type Out = OutInner[A]
+  }
+
+  def f1: O1[Int]#Out = ???
+}

tests/pending/pos/overload-generic.scala

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+class Test {
+  def rawr(string: String): String = string
+}
+
+implicit final class RawrExt(val t: Test) {
+  def rawr(int: Int): Int = int
+}
+
+val t = new Test
+
+val r0 = t.rawr(5)
+
+
+class TestP {
+  def rawr[A](list: List[A]): List[A] = list
+}
+
+implicit final class RawrExtP(val t: TestP) {
+  def rawr(int: Int): Int = int
+}
+
+val tt = new TestP
+
+val r1 = tt.rawr(5) // This doesn't compile

tests/pos/infer1.scala

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+trait TestInferrence[T] {
+
+  def getInt(t: T): Int
+
+}
+
+object TestIntInferrence extends TestInferrence[Int] {
+  override def getInt(i: Int) = i
+}
+
+object InferrenceTest {
+
+  def createNumberHandler[T](
+    testInfer: TestInferrence[T] = TestIntInferrence,
+    handlers: Map[String, T => Unit] = Map.empty,
+  ): T => Unit = {
+
+    (t: T) => {
+      testInfer.getInt(t)
+      ()
+    }
+
+  }
+}
+
+class InferrenceTest {
+
+  val handler = InferrenceTest.createNumberHandler()
+
+}

tests/run/Pouring.check

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+Vector(Empty(0), Empty(1), Fill(0), Fill(1), Pour(0,1), Pour(1,0))
+Fill(1) Pour(1,0) Empty(0) Pour(1,0) Fill(1) Pour(1,0) --> Vector(4, 6)

tests/run/Pouring.scala

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+class Pouring(capacity: Vector[Int]) with
+  type Glass = Int
+  type Content = Vector[Int]
+
+  enum Move with
+    def apply(content: Content): Content = this match
+      case Empty(g) => content.updated(g, 0)
+      case Fill(g) => content.updated(g, capacity(g))
+      case Pour(from, to) =>
+        val amount = content(from) min (capacity(to) - content(to))
+        def (s: Content) adjust (g: Glass, delta: Int) = s.updated(g, s(g) + delta)
+        content.adjust(from, -amount).adjust(to, amount)
+
+    case Empty(glass: Glass)
+    case Fill(glass: Glass)
+    case Pour(from: Glass, to: Glass)
+  end Move
+
+  val moves =
+    val glasses = 0 until capacity.length
+       (for g <- glasses yield Move.Empty(g))
+    ++ (for g <- glasses yield Move.Fill(g))
+    ++ (for g1 <- glasses; g2 <- glasses if g1 != g2 yield Move.Pour(g1, g2))
+
+  class Path(history: List[Move], val endContent: Content) with
+    def extend(move: Move) = Path(move :: history, move(endContent))
+    override def toString = s"${history.reverse.mkString(" ")} --> $endContent"
+  end Path
+
+  val initialContent: Content = capacity.map(x => 0)
+  val initialPath = Path(Nil, initialContent)
+
+  def from(paths: Set[Path], explored: Set[Content]): LazyList[Set[Path]] =
+    if paths.isEmpty then LazyList.empty
+    else
+      val extensions =
+        for
+          path <- paths
+          move <- moves
+          next = path.extend(move)
+          if !explored.contains(next.endContent)
+        yield next
+      paths #:: from(extensions, explored ++ extensions.map(_.endContent))
+
+  def solutions(target: Int): LazyList[Path] =
+    for
+      paths <- from(Set(initialPath), Set(initialContent))
+      path <- paths
+      if path.endContent.contains(target)
+    yield path
+end Pouring
+
+@main def Test =
+  val problem = Pouring(Vector(4, 7))
+  println(problem.moves)
+  println(problem.solutions(6).head)