diff options
Diffstat (limited to 'tests/pending/run/reify_fors_newpatmat.scala')
-rw-r--r-- | tests/pending/run/reify_fors_newpatmat.scala | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/tests/pending/run/reify_fors_newpatmat.scala b/tests/pending/run/reify_fors_newpatmat.scala deleted file mode 100644 index d366169a4..000000000 --- a/tests/pending/run/reify_fors_newpatmat.scala +++ /dev/null @@ -1,101 +0,0 @@ -import scala.reflect.runtime.universe._ -import scala.tools.reflect.Eval - -object Test extends dotty.runtime.LegacyApp { - reify { - object Persons { - /** A list of persons. To create a list, we use Predef.List - * which takes a variable number of arguments and constructs - * a list out of them. - */ - val persons = List( - new Person("Bob", 17), - new Person("John", 40), - new Person("Richard", 68) - ) - - /** A Person class. 'val' constructor parameters become - * public members of the class. - */ - class Person(val name: String, val age: Int) - - /** Return an iterator over persons that are older than 20. - */ - def olderThan20(xs: Seq[Person]): Iterator[String] = - olderThan20(xs.iterator) - - /** Return an iterator over persons older than 20, given - * an iterator over persons. - */ - def olderThan20(xs: Iterator[Person]): Iterator[String] = { - - // The first expression is called a 'generator' and makes - // 'p' take values from 'xs'. The second expression is - // called a 'filter' and it is a boolean expression which - // selects only persons older than 20. There can be more than - // one generator and filter. The 'yield' expression is evaluated - // for each 'p' which satisfies the filters and used to assemble - // the resulting iterator - for (p <- xs if p.age > 20) yield p.name - } - } - - /** Some functions over lists of numbers which demonstrate - * the use of for comprehensions. - */ - object Numeric { - - /** Return the divisors of n. */ - def divisors(n: Int): List[Int] = - for (i <- List.range(1, n+1) if n % i == 0) yield i - - /** Is 'n' a prime number? */ - def isPrime(n: Int) = divisors(n).length == 2 - - /** Return pairs of numbers whose sum is prime. */ - def findNums(n: Int): Iterable[(Int, Int)] = { - - // a for comprehension using two generators - for (i <- 1 until n; - j <- 1 until (i-1); - if isPrime(i + j)) yield (i, j) - } - - /** Return the sum of the elements of 'xs'. */ - def sum(xs: List[Double]): Double = - xs.foldLeft(0.0) { (x, y) => x + y } - - /** Return the sum of pairwise product of the two lists. */ - def scalProd(xs: List[Double], ys: List[Double]) = - sum(for((x, y) <- xs zip ys) yield x * y); - - /** Remove duplicate elements in 'xs'. */ - def removeDuplicates[A](xs: List[A]): List[A] = - if (xs.isEmpty) - xs - else - xs.head :: removeDuplicates(for (x <- xs.tail if x != xs.head) yield x) - } - - // import all members of object 'persons' in the current scope - import Persons._ - - print("Persons over 20:") - olderThan20(persons) foreach { x => print(" " + x) } - println - - import Numeric._ - - println("divisors(34) = " + divisors(34)) - - print("findNums(15) =") - findNums(15) foreach { x => print(" " + x) } - println - - val xs = List(3.5, 5.0, 4.5) - println("average(" + xs + ") = " + sum(xs) / xs.length) - - val ys = List(2.0, 1.0, 3.0) - println("scalProd(" + xs + ", " + ys +") = " + scalProd(xs, ys)) - }.eval -} |