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typelevel · Dec 30, 2019 · 66a7174 · 66a7174
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diff --git a/core/src/main/scala-2.12/cats/instances/stream.scala b/core/src/main/scala-2.12/cats/instances/stream.scala
@@ -199,14 +199,12 @@ private[instances] trait StreamInstancesBinCompat0 {
     override def flattenOption[A](fa: Stream[Option[A]]): Stream[A] = fa.flatten
 
     def traverseFilter[G[_], A, B](fa: Stream[A])(f: (A) => G[Option[B]])(implicit G: Applicative[G]): G[Stream[B]] =
-      fa.foldRight(Eval.now(G.pure(Stream.empty[B])))(
-          (x, xse) => G.map2Eval(f(x), xse)((i, o) => i.fold(o)(_ +: o))
-        )
+      fa.foldRight(Eval.now(G.pure(Stream.empty[B])))((x, xse) => G.map2Eval(f(x), xse)((i, o) => i.fold(o)(_ +: o)))
         .value
 
     override def filterA[G[_], A](fa: Stream[A])(f: (A) => G[Boolean])(implicit G: Applicative[G]): G[Stream[A]] =
-      fa.foldRight(Eval.now(G.pure(Stream.empty[A])))(
-          (x, xse) => G.map2Eval(f(x), xse)((b, as) => if (b) x +: as else as)
+      fa.foldRight(Eval.now(G.pure(Stream.empty[A])))((x, xse) =>
+          G.map2Eval(f(x), xse)((b, as) => if (b) x +: as else as)
         )
         .value
 

diff --git a/core/src/main/scala-2.13+/cats/data/NonEmptyLazyList.scala b/core/src/main/scala-2.13+/cats/data/NonEmptyLazyList.scala
@@ -386,8 +386,8 @@ sealed abstract private[data] class NonEmptyLazyListInstances extends NonEmptyLa
       def monad: Monad[NonEmptyLazyList] = NonEmptyLazyList.catsDataInstancesForNonEmptyLazyList
 
       def sequential: OneAnd[ZipLazyList, *] ~> NonEmptyLazyList =
-        λ[OneAnd[ZipLazyList, *] ~> NonEmptyLazyList](
-          znell => NonEmptyLazyList.fromLazyListPrepend(znell.head, znell.tail.value)
+        λ[OneAnd[ZipLazyList, *] ~> NonEmptyLazyList](znell =>
+          NonEmptyLazyList.fromLazyListPrepend(znell.head, znell.tail.value)
         )
 
       def parallel: NonEmptyLazyList ~> OneAnd[ZipLazyList, *] =

diff --git a/core/src/main/scala-2.13+/cats/instances/lazyList.scala b/core/src/main/scala-2.13+/cats/instances/lazyList.scala
@@ -163,14 +163,12 @@ trait LazyListInstances extends cats.kernel.instances.LazyListInstances {
     def traverseFilter[G[_], A, B](
       fa: LazyList[A]
     )(f: (A) => G[Option[B]])(implicit G: Applicative[G]): G[LazyList[B]] =
-      fa.foldRight(Eval.now(G.pure(LazyList.empty[B])))(
-          (x, xse) => G.map2Eval(f(x), xse)((i, o) => i.fold(o)(_ +: o))
-        )
+      fa.foldRight(Eval.now(G.pure(LazyList.empty[B])))((x, xse) => G.map2Eval(f(x), xse)((i, o) => i.fold(o)(_ +: o)))
         .value
 
     override def filterA[G[_], A](fa: LazyList[A])(f: (A) => G[Boolean])(implicit G: Applicative[G]): G[LazyList[A]] =
-      fa.foldRight(Eval.now(G.pure(LazyList.empty[A])))(
-          (x, xse) => G.map2Eval(f(x), xse)((b, as) => if (b) x +: as else as)
+      fa.foldRight(Eval.now(G.pure(LazyList.empty[A])))((x, xse) =>
+          G.map2Eval(f(x), xse)((b, as) => if (b) x +: as else as)
         )
         .value
 

diff --git a/core/src/main/scala-2.13+/cats/instances/stream.scala b/core/src/main/scala-2.13+/cats/instances/stream.scala
@@ -201,14 +201,12 @@ private[instances] trait StreamInstancesBinCompat0 {
     override def flattenOption[A](fa: Stream[Option[A]]): Stream[A] = fa.flatten
 
     def traverseFilter[G[_], A, B](fa: Stream[A])(f: (A) => G[Option[B]])(implicit G: Applicative[G]): G[Stream[B]] =
-      fa.foldRight(Eval.now(G.pure(Stream.empty[B])))(
-          (x, xse) => G.map2Eval(f(x), xse)((i, o) => i.fold(o)(_ +: o))
-        )
+      fa.foldRight(Eval.now(G.pure(Stream.empty[B])))((x, xse) => G.map2Eval(f(x), xse)((i, o) => i.fold(o)(_ +: o)))
         .value
 
     override def filterA[G[_], A](fa: Stream[A])(f: (A) => G[Boolean])(implicit G: Applicative[G]): G[Stream[A]] =
-      fa.foldRight(Eval.now(G.pure(Stream.empty[A])))(
-          (x, xse) => G.map2Eval(f(x), xse)((b, as) => if (b) x +: as else as)
+      fa.foldRight(Eval.now(G.pure(Stream.empty[A])))((x, xse) =>
+          G.map2Eval(f(x), xse)((b, as) => if (b) x +: as else as)
         )
         .value
 

diff --git a/core/src/main/scala/cats/Foldable.scala b/core/src/main/scala/cats/Foldable.scala
@@ -332,12 +332,11 @@ import Foldable.sentinel
    *}}}
    */
   def collectFoldSome[A, B](fa: F[A])(f: A => Option[B])(implicit B: Monoid[B]): B =
-    foldLeft(fa, B.empty)(
-      (acc, a) =>
-        f(a) match {
-          case Some(x) => B.combine(acc, x)
-          case None    => acc
-        }
+    foldLeft(fa, B.empty)((acc, a) =>
+      f(a) match {
+        case Some(x) => B.combine(acc, x)
+        case None    => acc
+      }
     )
 
   /**
@@ -699,12 +698,11 @@ import Foldable.sentinel
     implicit val mb: Monoid[F[B]] = A.algebra[B]
     implicit val mc: Monoid[F[C]] = A.algebra[C]
 
-    foldMap(fa)(
-      a =>
-        f(a) match {
-          case Right(c) => (A.empty[B], A.pure(c))
-          case Left(b)  => (A.pure(b), A.empty[C])
-        }
+    foldMap(fa)(a =>
+      f(a) match {
+        case Right(c) => (A.empty[B], A.pure(c))
+        case Left(b)  => (A.pure(b), A.empty[C])
+      }
     )
   }
 
@@ -806,8 +804,8 @@ import Foldable.sentinel
     implicit val mb: Monoid[F[B]] = A.algebra[B]
     implicit val mc: Monoid[F[C]] = A.algebra[C]
 
-    foldMap[A, (F[B], F[C])](fa)(
-      a => H.bifoldMap[B, C, (F[B], F[C])](f(a))(b => (A.pure(b), A.empty[C]), c => (A.empty[B], A.pure(c)))
+    foldMap[A, (F[B], F[C])](fa)(a =>
+      H.bifoldMap[B, C, (F[B], F[C])](f(a))(b => (A.pure(b), A.empty[C]), c => (A.empty[B], A.pure(c)))
     )
   }
 
@@ -832,11 +830,10 @@ import Foldable.sentinel
     implicit val mb: Monoid[F[B]] = A.algebra[B]
     implicit val mc: Monoid[F[C]] = A.algebra[C]
 
-    foldMapM[G, A, (F[B], F[C])](fa)(
-      a =>
-        M.map(f(a)) {
-          H.bifoldMap[B, C, (F[B], F[C])](_)(b => (A.pure(b), A.empty[C]), c => (A.empty[B], A.pure(c)))
-        }
+    foldMapM[G, A, (F[B], F[C])](fa)(a =>
+      M.map(f(a)) {
+        H.bifoldMap[B, C, (F[B], F[C])](_)(b => (A.pure(b), A.empty[C]), c => (A.empty[B], A.pure(c)))
+      }
     )
   }
 

diff --git a/core/src/main/scala/cats/Monad.scala b/core/src/main/scala/cats/Monad.scala
@@ -24,16 +24,15 @@ import simulacrum.typeclass
    */
   def whileM[G[_], A](p: F[Boolean])(body: => F[A])(implicit G: Alternative[G]): F[G[A]] = {
     val b = Eval.later(body)
-    tailRecM[G[A], G[A]](G.empty)(
-      xs =>
-        ifM(p)(
-          ifTrue = {
-            map(b.value) { bv =>
-              Left(G.combineK(xs, G.pure(bv)))
-            }
-          },
-          ifFalse = pure(Right(xs))
-        )
+    tailRecM[G[A], G[A]](G.empty)(xs =>
+      ifM(p)(
+        ifTrue = {
+          map(b.value) { bv =>
+            Left(G.combineK(xs, G.pure(bv)))
+          }
+        },
+        ifFalse = pure(Right(xs))
+      )
     )
   }
 
@@ -46,14 +45,13 @@ import simulacrum.typeclass
     val continue: Either[Unit, Unit] = Left(())
     val stop: F[Either[Unit, Unit]] = pure(Right(()))
     val b = Eval.later(body)
-    tailRecM(())(
-      _ =>
-        ifM(p)(
-          ifTrue = {
-            map(b.value)(_ => continue)
-          },
-          ifFalse = stop
-        )
+    tailRecM(())(_ =>
+      ifM(p)(
+        ifTrue = {
+          map(b.value)(_ => continue)
+        },
+        ifFalse = stop
+      )
     )
   }
 

diff --git a/core/src/main/scala/cats/Reducible.scala b/core/src/main/scala/cats/Reducible.scala
@@ -260,14 +260,13 @@ import simulacrum.{noop, typeclass}
     import cats.syntax.either._
 
     def g(a: A, eval: Eval[Ior[NonEmptyList[B], NonEmptyList[C]]]): Eval[Ior[NonEmptyList[B], NonEmptyList[C]]] =
-      eval.map(
-        ior =>
-          (f(a), ior) match {
-            case (Right(c), Ior.Left(_)) => ior.putRight(NonEmptyList.one(c))
-            case (Right(c), _)           => ior.map(c :: _)
-            case (Left(b), Ior.Right(r)) => Ior.bothNel(b, r)
-            case (Left(b), _)            => ior.leftMap(b :: _)
-          }
+      eval.map(ior =>
+        (f(a), ior) match {
+          case (Right(c), Ior.Left(_)) => ior.putRight(NonEmptyList.one(c))
+          case (Right(c), _)           => ior.map(c :: _)
+          case (Left(b), Ior.Right(r)) => Ior.bothNel(b, r)
+          case (Left(b), _)            => ior.leftMap(b :: _)
+        }
       )
 
     reduceRightTo(fa)(a => f(a).bimap(NonEmptyList.one, NonEmptyList.one).toIor)(g).value

diff --git a/core/src/main/scala/cats/data/Chain.scala b/core/src/main/scala/cats/data/Chain.scala
@@ -812,15 +812,13 @@ sealed abstract private[data] class ChainInstances extends ChainInstances1 {
 
     def traverseFilter[G[_], A, B](fa: Chain[A])(f: A => G[Option[B]])(implicit G: Applicative[G]): G[Chain[B]] =
       traverse
-        .foldRight(fa, Eval.now(G.pure(Chain.empty[B])))(
-          (x, xse) => G.map2Eval(f(x), xse)((i, o) => i.fold(o)(_ +: o))
-        )
+        .foldRight(fa, Eval.now(G.pure(Chain.empty[B])))((x, xse) => G.map2Eval(f(x), xse)((i, o) => i.fold(o)(_ +: o)))
         .value
 
     override def filterA[G[_], A](fa: Chain[A])(f: A => G[Boolean])(implicit G: Applicative[G]): G[Chain[A]] =
       traverse
-        .foldRight(fa, Eval.now(G.pure(Chain.empty[A])))(
-          (x, xse) => G.map2Eval(f(x), xse)((b, chain) => if (b) x +: chain else chain)
+        .foldRight(fa, Eval.now(G.pure(Chain.empty[A])))((x, xse) =>
+          G.map2Eval(f(x), xse)((b, chain) => if (b) x +: chain else chain)
         )
         .value
 

diff --git a/core/src/main/scala/cats/data/EitherT.scala b/core/src/main/scala/cats/data/EitherT.scala
@@ -946,13 +946,12 @@ private[data] trait EitherTMonad[F[_], L] extends Monad[EitherT[F, L, *]] with E
   def flatMap[A, B](fa: EitherT[F, L, A])(f: A => EitherT[F, L, B]): EitherT[F, L, B] = fa.flatMap(f)
   def tailRecM[A, B](a: A)(f: A => EitherT[F, L, Either[A, B]]): EitherT[F, L, B] =
     EitherT(
-      F.tailRecM(a)(
-        a0 =>
-          F.map(f(a0).value) {
-            case Left(l)         => Right(Left(l))
-            case Right(Left(a1)) => Left(a1)
-            case Right(Right(b)) => Right(Right(b))
-          }
+      F.tailRecM(a)(a0 =>
+        F.map(f(a0).value) {
+          case Left(l)         => Right(Left(l))
+          case Right(Left(a1)) => Left(a1)
+          case Right(Right(b)) => Right(Right(b))
+        }
       )
     )
 }

diff --git a/core/src/main/scala/cats/data/IndexedStateT.scala b/core/src/main/scala/cats/data/IndexedStateT.scala
@@ -144,13 +144,10 @@ final class IndexedStateT[F[_], SA, SB, A](val runF: F[SA => F[(SB, A)]]) extend
    * }}}
    */
   def transformS[R](f: R => SA, g: (R, SB) => R)(implicit F: Functor[F]): IndexedStateT[F, R, R, A] =
-    StateT.applyF(F.map(runF) {
-      sfsa =>
-        { (r: R) =>
-          val sa = f(r)
-          val fsba = sfsa(sa)
-          F.map(fsba) { case (sb, a) => (g(r, sb), a) }
-        }
+    StateT.applyF(F.map(runF) { sfsa => (r: R) =>
+      val sa = f(r)
+      val fsba = sfsa(sa)
+      F.map(fsba) { case (sb, a) => (g(r, sb), a) }
     })
 
   /**
@@ -435,11 +432,10 @@ sealed abstract private[data] class IndexedStateTMonad[F[_], S]
     fa.flatMap(f)
 
   def tailRecM[A, B](a: A)(f: A => IndexedStateT[F, S, S, Either[A, B]]): IndexedStateT[F, S, S, B] =
-    IndexedStateT[F, S, S, B](
-      s =>
-        F.tailRecM[(S, A), (S, B)]((s, a)) {
-          case (s, a) => F.map(f(a).run(s)) { case (s, ab) => ab.bimap((s, _), (s, _)) }
-        }
+    IndexedStateT[F, S, S, B](s =>
+      F.tailRecM[(S, A), (S, B)]((s, a)) {
+        case (s, a) => F.map(f(a).run(s)) { case (s, ab) => ab.bimap((s, _), (s, _)) }
+      }
     )
 }
 
@@ -470,14 +466,12 @@ sealed abstract private[data] class IndexedStateTContravariantMonoidal[F[_], S]
   def contramap2[A, B, C](fb: IndexedStateT[F, S, S, B],
                           fc: IndexedStateT[F, S, S, C])(f: A => (B, C)): IndexedStateT[F, S, S, A] =
     IndexedStateT.applyF(
-      G.pure(
-        (s: S) =>
-          ContravariantMonoidal.contramap2(G.map(fb.runF)(_.apply(s)), G.map(fc.runF)(_.apply(s)))(
-            (tup: (S, A)) =>
-              f(tup._2) match {
-                case (b, c) => (G.pure((tup._1, b)), G.pure((tup._1, c)))
-              }
-          )(G, F)
+      G.pure((s: S) =>
+        ContravariantMonoidal.contramap2(G.map(fb.runF)(_.apply(s)), G.map(fc.runF)(_.apply(s)))((tup: (S, A)) =>
+          f(tup._2) match {
+            case (b, c) => (G.pure((tup._1, b)), G.pure((tup._1, c)))
+          }
+        )(G, F)
       )
     )
 }

diff --git a/core/src/main/scala/cats/data/Kleisli.scala b/core/src/main/scala/cats/data/Kleisli.scala
@@ -473,12 +473,11 @@ private[data] trait KleisliArrowChoice[F[_]]
     Kleisli { case (a, c) => F.flatMap(f.run(a))(b => F.map(g.run(c))(d => (b, d))) }
 
   def choose[A, B, C, D](f: Kleisli[F, A, C])(g: Kleisli[F, B, D]): Kleisli[F, Either[A, B], Either[C, D]] =
-    Kleisli(
-      (fe: Either[A, B]) =>
-        fe match {
-          case Left(a)  => F.map(f(a))(Left.apply _)
-          case Right(b) => F.map(g(b))(Right.apply _)
-        }
+    Kleisli((fe: Either[A, B]) =>
+      fe match {
+        case Left(a)  => F.map(f(a))(Left.apply _)
+        case Right(b) => F.map(g(b))(Right.apply _)
+      }
     )
 }
 

diff --git a/core/src/main/scala/cats/data/NonEmptyList.scala b/core/src/main/scala/cats/data/NonEmptyList.scala
@@ -599,14 +599,13 @@ sealed abstract private[data] class NonEmptyListInstances extends NonEmptyListIn
         val reversed = fa.reverse
         val lastIor = f(reversed.head).bimap(NonEmptyList.one, NonEmptyList.one).toIor
 
-        reversed.tail.foldLeft(lastIor)(
-          (ior, a) =>
-            (f(a), ior) match {
-              case (Right(c), Ior.Left(_)) => ior.putRight(NonEmptyList.one(c))
-              case (Right(c), _)           => ior.map(c :: _)
-              case (Left(b), Ior.Right(r)) => Ior.bothNel(b, r)
-              case (Left(b), _)            => ior.leftMap(b :: _)
-            }
+        reversed.tail.foldLeft(lastIor)((ior, a) =>
+          (f(a), ior) match {
+            case (Right(c), Ior.Left(_)) => ior.putRight(NonEmptyList.one(c))
+            case (Right(c), _)           => ior.map(c :: _)
+            case (Left(b), Ior.Right(r)) => Ior.bothNel(b, r)
+            case (Left(b), _)            => ior.leftMap(b :: _)
+          }
         )
 
       }

diff --git a/core/src/main/scala/cats/data/NonEmptyVector.scala b/core/src/main/scala/cats/data/NonEmptyVector.scala
@@ -317,14 +317,13 @@ sealed abstract private[data] class NonEmptyVectorInstances {
         import cats.syntax.either._
         import cats.syntax.reducible._
 
-        reduceLeftTo(fa)(a => f(a).bimap(NonEmptyVector.one, NonEmptyVector.one).toIor)(
-          (ior, a) =>
-            (f(a), ior) match {
-              case (Right(c), Ior.Left(_)) => ior.putRight(NonEmptyVector.one(c))
-              case (Right(c), _)           => ior.map(_ :+ c)
-              case (Left(b), Ior.Right(_)) => ior.putLeft(NonEmptyVector.one(b))
-              case (Left(b), _)            => ior.leftMap(_ :+ b)
-            }
+        reduceLeftTo(fa)(a => f(a).bimap(NonEmptyVector.one, NonEmptyVector.one).toIor)((ior, a) =>
+          (f(a), ior) match {
+            case (Right(c), Ior.Left(_)) => ior.putRight(NonEmptyVector.one(c))
+            case (Right(c), _)           => ior.map(_ :+ c)
+            case (Left(b), Ior.Right(_)) => ior.putLeft(NonEmptyVector.one(b))
+            case (Left(b), _)            => ior.leftMap(_ :+ b)
+          }
         ).bimap(_.toNonEmptyList, _.toNonEmptyList)
 
       }

diff --git a/core/src/main/scala/cats/data/OptionT.scala b/core/src/main/scala/cats/data/OptionT.scala
@@ -382,11 +382,10 @@ private[data] trait OptionTMonad[F[_]] extends Monad[OptionT[F, *]] {
 
   def tailRecM[A, B](a: A)(f: A => OptionT[F, Either[A, B]]): OptionT[F, B] =
     OptionT(
-      F.tailRecM(a)(
-        a0 =>
-          F.map(f(a0).value)(
-            _.fold(Either.right[A, Option[B]](None))(_.map(b => Some(b): Option[B]))
-          )
+      F.tailRecM(a)(a0 =>
+        F.map(f(a0).value)(
+          _.fold(Either.right[A, Option[B]](None))(_.map(b => Some(b): Option[B]))
+        )
       )
     )
 }
@@ -423,12 +422,11 @@ private trait OptionTContravariantMonoidal[F[_]] extends ContravariantMonoidal[O
 
   override def product[A, B](fa: OptionT[F, A], fb: OptionT[F, B]): OptionT[F, (A, B)] =
     OptionT(
-      F.contramap(F.product(fa.value, fb.value))(
-        (t: Option[(A, B)]) =>
-          t match {
-            case Some((x, y)) => (Some(x), Some(y))
-            case None         => (None, None)
-          }
+      F.contramap(F.product(fa.value, fb.value))((t: Option[(A, B)]) =>
+        t match {
+          case Some((x, y)) => (Some(x), Some(y))
+          case None         => (None, None)
+        }
       )
     )
 }