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author | Seth Tisue <seth@tisue.net> | 2017-03-21 10:35:05 -0700 |
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committer | Seth Tisue <seth@tisue.net> | 2017-03-21 10:35:05 -0700 |
commit | 4b9816100c704fd8ecfb1a8fa66f86e6284c07cb (patch) | |
tree | 5f748bbc562da8803513444375659f7cd96496f5 /test/pending/run/reify_simpleinterpreter.scala | |
parent | 25048bc73741846107c18ed01e0e9f6f07785379 (diff) | |
download | scala-4b9816100c704fd8ecfb1a8fa66f86e6284c07cb.tar.gz scala-4b9816100c704fd8ecfb1a8fa66f86e6284c07cb.tar.bz2 scala-4b9816100c704fd8ecfb1a8fa66f86e6284c07cb.zip |
remove test/pending directory too
it will all stay right there in the Git history to be consulted
anytime we want...
Diffstat (limited to 'test/pending/run/reify_simpleinterpreter.scala')
-rw-r--r-- | test/pending/run/reify_simpleinterpreter.scala | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/test/pending/run/reify_simpleinterpreter.scala b/test/pending/run/reify_simpleinterpreter.scala deleted file mode 100644 index 1f6d6c8da7..0000000000 --- a/test/pending/run/reify_simpleinterpreter.scala +++ /dev/null @@ -1,75 +0,0 @@ -import scala.reflect.runtime.universe._ - -object Test extends App { - reify { - case class M[A](value: A) { - def bind[B](k: A => M[B]): M[B] = k(value) - def map[B](f: A => B): M[B] = bind(x => unitM(f(x))) - def flatMap[B](f: A => M[B]): M[B] = bind(f) - } - - def unitM[A](a: A): M[A] = M(a) - - def showM(m: M[Value]): String = m.value.toString(); - - type Name = String - - trait Term; - case class Var(x: Name) extends Term - case class Con(n: Int) extends Term - case class Add(l: Term, r: Term) extends Term - case class Lam(x: Name, body: Term) extends Term - case class App(fun: Term, arg: Term) extends Term - - trait Value - case object Wrong extends Value { - override def toString() = "wrong" - } - case class Num(n: Int) extends Value { - override def toString() = n.toString() - } - case class Fun(f: Value => M[Value]) extends Value { - override def toString() = "<function>" - } - - type Environment = List[Tuple2[Name, Value]] - - def lookup(x: Name, e: Environment): M[Value] = e match { - case List() => unitM(Wrong) - case (y, b) :: e1 => if (x == y) unitM(b) else lookup(x, e1) - } - - def add(a: Value, b: Value): M[Value] = (a, b) match { - case (Num(m), Num(n)) => unitM(Num(m + n)) - case _ => unitM(Wrong) - } - - def apply(a: Value, b: Value): M[Value] = a match { - case Fun(k) => k(b) - case _ => unitM(Wrong) - } - - def interp(t: Term, e: Environment): M[Value] = t match { - case Var(x) => lookup(x, e) - case Con(n) => unitM(Num(n)) - case Add(l, r) => for (a <- interp(l, e); - b <- interp(r, e); - c <- add(a, b)) - yield c - case Lam(x, t) => unitM(Fun(a => interp(t, (x, a) :: e))) - case App(f, t) => for (a <- interp(f, e); - b <- interp(t, e); - c <- apply(a, b)) - yield c - } - - def test(t: Term): String = - showM(interp(t, List())) - - val term0 = App(Lam("x", Add(Var("x"), Var("x"))), Add(Con(10), Con(11))) - val term1 = App(Con(1), Con(2)) - - println(test(term0)) - println(test(term1)) - }.eval -} |