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Add toSet to TSet #4132

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Merged
merged 2 commits into from
Aug 26, 2020
Merged

Add toSet to TSet #4132

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7951f57
Add TSet.toSet
mijicd Aug 26, 2020
0c687b1
Remove duplicated code
mijicd Aug 26, 2020
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12 changes: 11 additions & 1 deletion core-tests/shared/src/test/scala/zio/stm/TSetSpec.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,6 @@ object TSetSpec extends ZIOBaseSpec {
testM("apply") {
val tx = TSet.make(1, 2, 2, 3).flatMap[Any, Nothing, List[Int]](_.toList)
assertM(tx.commit)(hasSameElements(List(1, 2, 3)))

},
testM("empty") {
val tx = TSet.empty[Int].flatMap[Any, Nothing, List[Int]](_.toList)
Expand Down Expand Up @@ -200,6 +199,17 @@ object TSetSpec extends ZIOBaseSpec {
} yield res

assertM(tx.commit)(equalTo(0))
},
testM("toSet") {
val set = Set(1, 2, 3)

val tx =
for {
tset <- TSet.fromIterable(set)
res <- tset.toSet
} yield res

assertM(tx.commit)(hasSameElements(set))
}
),
suite("set operations")(
Expand Down
9 changes: 7 additions & 2 deletions core/shared/src/main/scala/zio/stm/TSet.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,7 @@ final class TSet[A] private (private val tmap: TMap[A, Unit]) extends AnyVal {
* provided set.
*/
def diff(other: TSet[A]): USTM[Unit] =
other.toList.map(_.toSet).flatMap(vals => removeIf(vals.contains))
other.toSet.flatMap(vals => removeIf(vals.contains))

/**
* Atomically folds using a pure function.
Expand All @@ -69,7 +69,7 @@ final class TSet[A] private (private val tmap: TMap[A, Unit]) extends AnyVal {
* provided set.
*/
def intersect(other: TSet[A]): USTM[Unit] =
other.toList.map(_.toSet).flatMap(vals => retainIf(vals.contains))
other.toSet.flatMap(vals => retainIf(vals.contains))

/**
* Stores new element in the set.
Expand Down Expand Up @@ -99,6 +99,11 @@ final class TSet[A] private (private val tmap: TMap[A, Unit]) extends AnyVal {
*/
def toList: USTM[List[A]] = tmap.keys

/**
* Collects all elements into a set.
*/
def toSet: USTM[Set[A]] = toList.map(_.toSet)

/**
* Atomically updates all elements using a pure function.
*/
Expand Down