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author | Li Haoyi <haoyi.sg@gmail.com> | 2017-11-16 04:18:17 -0800 |
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committer | Li Haoyi <haoyi.sg@gmail.com> | 2017-11-16 04:18:17 -0800 |
commit | eaba6c7ed4b1dc29c3b0d05be58f1bfd122f369d (patch) | |
tree | 17161703938ea0ea862ede41f4980fcd521468e1 /core/src | |
parent | 28dbe29a2ab566249642e81405a953f33507828a (diff) | |
download | mill-eaba6c7ed4b1dc29c3b0d05be58f1bfd122f369d.tar.gz mill-eaba6c7ed4b1dc29c3b0d05be58f1bfd122f369d.tar.bz2 mill-eaba6c7ed4b1dc29c3b0d05be58f1bfd122f369d.zip |
interpreter-based `Cross` seems to work
Diffstat (limited to 'core/src')
-rw-r--r-- | core/src/main/scala/mill/define/Cross.scala | 75 | ||||
-rw-r--r-- | core/src/test/scala/mill/CrossTests.scala | 71 |
2 files changed, 99 insertions, 47 deletions
diff --git a/core/src/main/scala/mill/define/Cross.scala b/core/src/main/scala/mill/define/Cross.scala index c84e9b3d..1f457096 100644 --- a/core/src/main/scala/mill/define/Cross.scala +++ b/core/src/main/scala/mill/define/Cross.scala @@ -1,18 +1,67 @@ package mill.define +sealed trait Cross[T]{ + def flatMap[V](f: T => Cross[V]): Cross[V] = new Cross.FlatMapping(this, f) + def map[V](f: T => V): Cross[V] = new Cross.Mapping(this, f) + def withFilter(f: T => Boolean): Cross[T] = new Cross.Filtering(this, f) -case class Cross[+T](items: T*){ - def flatMap[V](f: T => Cross[V]): Cross[(T, V)] = { - val flattened = for{ - i <- items - k <- f(i).items - } yield (i, k) - Cross(flattened:_*) - } - def map[V](f: T => V): Cross[(T, V)] = { - Cross(items.map(i => i -> f(i)):_*) +} +object Cross{ + class Listing[T](val items: Seq[T]) extends Cross[T] + class Mapping[T, V](val parent: Cross[T], val f: T => V) extends Cross[V] + class FlatMapping[T, V](val parent: Cross[T], val f: T => Cross[V]) extends Cross[V] + class Filtering[T](val parent: Cross[T], val f: T => Boolean) extends Cross[T] + + def apply[T](t: T*) = new Cross.Listing(t) + + def evaluate[T](c: Cross[T]): List[(List[Any], T)] = c match{ + case c: Listing[T] => c.items.map(i => List(i) -> i).toList + case c: Mapping[_, T] => evaluate(c.parent).map{case (l, v) => (l, c.f(v))} + case c: FlatMapping[_, T] => + evaluate(c.parent).flatMap{ + case (l, v) => evaluate(c.f(v)).map{case (l2, v2) => (l2 ::: l, v2)} + } + case c: Filtering[T] => evaluate(c.parent).filter(t => c.f(t._2)) } - def withFilter(f: T => Boolean) = { - Cross(items.filter(f):_*) + def test() = { + val example1 = evaluate( + for(a <- Cross(1, 2, 3)) + yield a.toString + ) + pprint.log(example1) + + val example2 = evaluate( + for{ + a <- Cross(1, 2, 3) + b <- Cross("A", "B", "C") + } yield b * a + ) + pprint.pprintln(example2) + + val example3 = evaluate( + for{ + a <- Cross(1, 2, 3) + b <- Cross("A", "B", "C") + c <- Cross(true, false) + } yield b * a + c + ) + pprint.log(example3) + + val example4 = evaluate( + for{ + a <- Cross(1, 2, 3) + b <- Cross("A", "B", "C") + if !(a == 2 && b == "B") + } yield b * a + ) + pprint.log(example4) + + val example5 = evaluate( + for{ + (a, b) <- for(a <- Cross(1, 2, 3); b <- Cross("A", "B", "C")) yield (a, b) + c <- Cross(true, false) + } yield b * a + c + ) + pprint.log(example5) } -} +}
\ No newline at end of file diff --git a/core/src/test/scala/mill/CrossTests.scala b/core/src/test/scala/mill/CrossTests.scala index ebf5d065..d39072c5 100644 --- a/core/src/test/scala/mill/CrossTests.scala +++ b/core/src/test/scala/mill/CrossTests.scala @@ -6,41 +6,44 @@ import utest._ object CrossTests extends TestSuite{ val tests = Tests{ - def assertEquals[T](value: Cross[T], value1: Cross[T]) = { - assert(value == value1) - } - 'map - assertEquals( - for(a <- Cross(1, 2, 3)) yield a.toString, - Cross(1 -> "1", 2 -> "2", 3 -> "3") - ) - 'flatMapFilter - assertEquals( - for{ - a <- Cross(1, 2) - b <- Cross("A", "B") - if !(a == 2 && b == "B") - } yield b * a, - Cross( - (1 -> ("A" -> "A")), - (1 -> ("B" -> "B")), - (2 -> ("A" -> "AA")) - ) - ) - 'reuse - { - val matrix = for{ - a <- Cross(1, 2) - b <- Cross("A", "B") - if !(a == 2 && b == "B") - } yield () - assertEquals( - for((a, (b, _)) <- matrix) - yield b * a, - Cross( - (1 -> ("A" -> "A")), - (1 -> ("B" -> "B")), - (2 -> ("A" -> "AA")) - ) - ) + 'test - { + Cross.test() } +// def assertEquals[T](value: Cross[T], value1: Cross[T]) = { +// assert(value == value1) +// } +// 'map - assertEquals( +// for(a <- Cross(1, 2, 3)) yield a.toString, +// Cross(1 -> "1", 2 -> "2", 3 -> "3") +// ) +// 'flatMapFilter - assertEquals( +// for{ +// a <- Cross(1, 2) +// b <- Cross("A", "B") +// if !(a == 2 && b == "B") +// } yield b * a, +// Cross( +// (1 -> ("A" -> "A")), +// (1 -> ("B" -> "B")), +// (2 -> ("A" -> "AA")) +// ) +// ) +// 'reuse - { +// val matrix = for{ +// a <- Cross(1, 2) +// b <- Cross("A", "B") +// if !(a == 2 && b == "B") +// } yield () +// assertEquals( +// for((a, (b, _)) <- matrix) +// yield b * a, +// Cross( +// (1 -> ("A" -> "A")), +// (1 -> ("B" -> "B")), +// (2 -> ("A" -> "AA")) +// ) +// ) +// } } |