From d7df049ddfe88099871757a65c1d41c62d9677e1 Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Fri, 3 Jan 2025 15:40:24 +0900
Subject: [PATCH 01/10] sbt 1.10.7

---
 project/build.properties | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/project/build.properties b/project/build.properties
index 09feeee..73df629 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.10.4
+sbt.version=1.10.7

From a3b34daca43ab0f08df83706e99472aea4093065 Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Tue, 5 Nov 2024 16:50:03 +0900
Subject: [PATCH 02/10] add SameParamOverloadingTest2

---
 .../scala-3/fix/SameParamOverloadingTest2.scala    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 input/src/main/scala-3/fix/SameParamOverloadingTest2.scala

diff --git a/input/src/main/scala-3/fix/SameParamOverloadingTest2.scala b/input/src/main/scala-3/fix/SameParamOverloadingTest2.scala
new file mode 100644
index 0000000..11f4d62
--- /dev/null
+++ b/input/src/main/scala-3/fix/SameParamOverloadingTest2.scala
@@ -0,0 +1,14 @@
+/*
+rule = SameParamOverloading
+ */
+package fix
+
+import scala.reflect.ClassTag
+
+object SameParamOverloadingTest2 {
+
+  abstract class A1 {
+    def x1[A](a: A)(using ClassTag[A]): Int // assert: SameParamOverloading
+    def x1[A](b: A): String // assert: SameParamOverloading
+  }
+}

From ef067df6ee8424fe3907192cbbd5a0a46b84ef84 Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Sat, 7 Dec 2024 09:55:32 +0900
Subject: [PATCH 03/10] fix CollectHeadOption

(cherry picked from commit 3dd9cfe0f2c32d2ccf41aeb1955285ee62f803e9)
---
 input/src/main/scala/fix/CollectHeadOptionTest.scala  | 1 +
 output/src/main/scala/fix/CollectHeadOptionTest.scala | 1 +
 rules/src/main/scala/fix/CollectHeadOption.scala      | 7 ++++++-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/input/src/main/scala/fix/CollectHeadOptionTest.scala b/input/src/main/scala/fix/CollectHeadOptionTest.scala
index fc3ba16..1ac2f91 100644
--- a/input/src/main/scala/fix/CollectHeadOptionTest.scala
+++ b/input/src/main/scala/fix/CollectHeadOptionTest.scala
@@ -5,4 +5,5 @@ package fix
 
 object CollectHeadOptionTest {
   def x1: Option[String] = List(1, 2, 3).collect { case n if n % 2 == 0 => n.toString }.headOption
+  def x2(f: PartialFunction[Int, String]): Option[String] = List(1, 2, 3).collect(f).headOption
 }
diff --git a/output/src/main/scala/fix/CollectHeadOptionTest.scala b/output/src/main/scala/fix/CollectHeadOptionTest.scala
index 52b6f62..e816244 100644
--- a/output/src/main/scala/fix/CollectHeadOptionTest.scala
+++ b/output/src/main/scala/fix/CollectHeadOptionTest.scala
@@ -2,4 +2,5 @@ package fix
 
 object CollectHeadOptionTest {
   def x1: Option[String] = List(1, 2, 3).collectFirst{ case n if n % 2 == 0 => n.toString }
+  def x2(f: PartialFunction[Int, String]): Option[String] = List(1, 2, 3).collectFirst(f)
 }
diff --git a/rules/src/main/scala/fix/CollectHeadOption.scala b/rules/src/main/scala/fix/CollectHeadOption.scala
index 21e08a6..40d5613 100644
--- a/rules/src/main/scala/fix/CollectHeadOption.scala
+++ b/rules/src/main/scala/fix/CollectHeadOption.scala
@@ -17,7 +17,12 @@ class CollectHeadOption extends SyntacticRule("CollectHeadOption") {
             ),
             Term.Name("headOption")
           ) =>
-        Patch.replaceTree(t, s"${obj}.collectFirst${func}")
+        func match {
+          case _: Term.PartialFunction =>
+            Patch.replaceTree(t, s"${obj}.collectFirst${func}")
+          case _ =>
+            Patch.replaceTree(t, s"${obj}.collectFirst(${func})")
+        }
     }
   }.asPatch
 }

From 6506b1e8c5edd33d9c9c5cad0c2418aca42f612e Mon Sep 17 00:00:00 2001
From: Scala Steward <2517319+scala-steward-bot@users.noreply.github.com>
Date: Tue, 10 Dec 2024 16:53:27 +0000
Subject: [PATCH 04/10] Update sbt-pgp to 2.3.1

(cherry picked from commit b8810a2a0649b92730ab00131bab34483bd4f5cf)
---
 project/plugins.sbt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/project/plugins.sbt b/project/plugins.sbt
index 18257b7..e99ccdf 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -4,7 +4,7 @@ addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % "0.10.0")
 
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.12.2")
 
-addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.0")
+addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.3.1")
 
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.2")
 

From 856a44fad9a6a88897ea55a2c99a8979ca5c3353 Mon Sep 17 00:00:00 2001
From: Scala Steward <2517319+scala-steward-bot@users.noreply.github.com>
Date: Sun, 24 Nov 2024 08:46:54 +0000
Subject: [PATCH 05/10] Update sbt-projectmatrix to 0.10.1

(cherry picked from commit 38d285370476ea3add9a2ed504b3b49f62880eba)
---
 project/plugins.sbt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/project/plugins.sbt b/project/plugins.sbt
index e99ccdf..dd7fc61 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,6 +1,6 @@
 addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.12.1")
 
-addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % "0.10.0")
+addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % "0.10.1")
 
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.12.2")
 

From dea9f8c345d4141143f67fd9b0cb6728d0c0187e Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Fri, 3 Jan 2025 12:48:50 +0900
Subject: [PATCH 06/10] WithLeftWithRight

(cherry picked from commit a49b86f15f3498d235fc995bdb08b9a6d23e00d7)
---
 .../scala-3/fix/WithLeftWithRightTest.scala   |  9 ++++++
 .../scala-3/fix/WithLeftWithRightTest.scala   |  6 ++++
 .../main/scala/fix/WithLeftWithRight.scala    | 32 +++++++++++++++++++
 3 files changed, 47 insertions(+)
 create mode 100644 input/src/main/scala-3/fix/WithLeftWithRightTest.scala
 create mode 100644 output/src/main/scala-3/fix/WithLeftWithRightTest.scala
 create mode 100644 rules/src/main/scala/fix/WithLeftWithRight.scala

diff --git a/input/src/main/scala-3/fix/WithLeftWithRightTest.scala b/input/src/main/scala-3/fix/WithLeftWithRightTest.scala
new file mode 100644
index 0000000..89fe3dc
--- /dev/null
+++ b/input/src/main/scala-3/fix/WithLeftWithRightTest.scala
@@ -0,0 +1,9 @@
+/*
+rule = WithLeftWithRight
+ */
+package fix
+
+trait WithLeftWithRightTest {
+  def x1: Either[String, Int] = Right[String, Int](2)
+  def x2: Either[String, Int] = Left[String, Int]("a")
+}
diff --git a/output/src/main/scala-3/fix/WithLeftWithRightTest.scala b/output/src/main/scala-3/fix/WithLeftWithRightTest.scala
new file mode 100644
index 0000000..1f1bb8e
--- /dev/null
+++ b/output/src/main/scala-3/fix/WithLeftWithRightTest.scala
@@ -0,0 +1,6 @@
+package fix
+
+trait WithLeftWithRightTest {
+  def x1: Either[String, Int] = Right(2).withLeft[String]
+  def x2: Either[String, Int] = Left("a").withRight[Int]
+}
diff --git a/rules/src/main/scala/fix/WithLeftWithRight.scala b/rules/src/main/scala/fix/WithLeftWithRight.scala
new file mode 100644
index 0000000..136b39a
--- /dev/null
+++ b/rules/src/main/scala/fix/WithLeftWithRight.scala
@@ -0,0 +1,32 @@
+package fix
+
+import scala.meta.Term
+import scala.meta.Type
+import scala.meta.XtensionCollectionLikeUI
+import scalafix.Patch
+import scalafix.v1.SyntacticDocument
+import scalafix.v1.SyntacticRule
+import scalafix.v1.XtensionSeqPatch
+
+class WithLeftWithRight extends SyntacticRule("WithLeftWithRight") {
+  override def fix(implicit doc: SyntacticDocument): Patch = {
+    doc.tree.collect {
+      case t @ Term.Apply.After_4_6_0(
+            Term.ApplyType.After_4_6_0(
+              Term.Name("Right"),
+              Type.ArgClause(left :: _ :: Nil)
+            ),
+            Term.ArgClause(value :: Nil, None)
+          ) =>
+        Patch.replaceTree(t, s"Right(${value}).withLeft[$left]")
+      case t @ Term.Apply.After_4_6_0(
+            Term.ApplyType.After_4_6_0(
+              Term.Name("Left"),
+              Type.ArgClause(_ :: right :: Nil)
+            ),
+            Term.ArgClause(value :: Nil, None)
+          ) =>
+        Patch.replaceTree(t, s"Left(${value}).withRight[$right]")
+    }.asPatch
+  }
+}

From e39ad59e618e9f21254a3b830b86790d2baad00b Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Fri, 3 Jan 2025 13:08:05 +0900
Subject: [PATCH 07/10] UsingParamAnonymous

(cherry picked from commit 0c0e8616b075bec7aba797b44fcdb2bed9f8d6b8)
---
 .../scala-3/fix/UsingParamAnonymousTest.scala |  9 ++++
 .../scala-3/fix/UsingParamAnonymousTest.scala |  6 +++
 .../main/scala/fix/UsingParamAnonymous.scala  | 42 +++++++++++++++++++
 3 files changed, 57 insertions(+)
 create mode 100644 input/src/main/scala-3/fix/UsingParamAnonymousTest.scala
 create mode 100644 output/src/main/scala-3/fix/UsingParamAnonymousTest.scala
 create mode 100644 rules/src/main/scala/fix/UsingParamAnonymous.scala

diff --git a/input/src/main/scala-3/fix/UsingParamAnonymousTest.scala b/input/src/main/scala-3/fix/UsingParamAnonymousTest.scala
new file mode 100644
index 0000000..471dcff
--- /dev/null
+++ b/input/src/main/scala-3/fix/UsingParamAnonymousTest.scala
@@ -0,0 +1,9 @@
+/*
+rule = UsingParamAnonymous
+ */
+package fix
+
+trait UsingParamAnonymousTest {
+  def f1(using a1: Int, a2: Int): Int = List(a1, 2).sum
+  def f2(using a1: Int, a2: String): Int = summon[Int] + summon[String].size
+}
diff --git a/output/src/main/scala-3/fix/UsingParamAnonymousTest.scala b/output/src/main/scala-3/fix/UsingParamAnonymousTest.scala
new file mode 100644
index 0000000..0030307
--- /dev/null
+++ b/output/src/main/scala-3/fix/UsingParamAnonymousTest.scala
@@ -0,0 +1,6 @@
+package fix
+
+trait UsingParamAnonymousTest {
+  def f1(using a1: Int, a2: Int): Int = List(a1, 2).sum
+  def f2(using  Int,  String): Int = summon[Int] + summon[String].size
+}
diff --git a/rules/src/main/scala/fix/UsingParamAnonymous.scala b/rules/src/main/scala/fix/UsingParamAnonymous.scala
new file mode 100644
index 0000000..46640eb
--- /dev/null
+++ b/rules/src/main/scala/fix/UsingParamAnonymous.scala
@@ -0,0 +1,42 @@
+package fix
+
+import scala.meta.Defn
+import scala.meta.Mod
+import scala.meta.Term
+import scala.meta.XtensionClassifiable
+import scala.meta.XtensionCollectionLikeUI
+import scala.meta.tokens.Token
+import scalafix.Patch
+import scalafix.v1.SyntacticDocument
+import scalafix.v1.SyntacticRule
+import scalafix.v1.XtensionSeqPatch
+
+class UsingParamAnonymous extends SyntacticRule("UsingParamAnonymous") {
+  override def fix(implicit doc: SyntacticDocument): Patch = {
+    doc.tree.collect { case t: Defn.Def =>
+      t.paramClauses.filter { paramClause =>
+        paramClause.values.forall(
+          _.mods.exists(_.is[Mod.Using])
+        ) && paramClause.values.forall(
+          !_.mods.exists(_.is[Mod.Inline])
+        )
+      }.map { paramClause =>
+        val countOneNames = t.collect { case x: Term.Name =>
+          x.value
+        }.groupBy(identity).filter(_._2.size == 1).keySet
+        if (paramClause.values.forall(a => countOneNames(a.name.value))) {
+          paramClause.values
+            .map(p =>
+              Seq(
+                Patch.removeTokens(p.name.tokens),
+                Patch.removeToken(p.tokens.find(_.is[Token.Colon]).get)
+              ).asPatch
+            )
+            .asPatch
+        } else {
+          Patch.empty
+        }
+      }.asPatch
+    }.asPatch
+  }
+}

From 719e82a32ddf1b2cb7528a7f474d44896b1de2d4 Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Fri, 3 Jan 2025 14:37:32 +0900
Subject: [PATCH 08/10] MatchParentheses

(cherry picked from commit d10c78220cdddc5d21a36da1a2fd2bfae7adb206)
---
 .../scala-3/fix/MatchParenthesesTest.scala    | 18 ++++++++++
 .../scala-3/fix/MatchParenthesesTest.scala    | 15 ++++++++
 .../src/main/scala/fix/MatchParentheses.scala | 34 +++++++++++++++++++
 3 files changed, 67 insertions(+)
 create mode 100644 input/src/main/scala-3/fix/MatchParenthesesTest.scala
 create mode 100644 output/src/main/scala-3/fix/MatchParenthesesTest.scala
 create mode 100644 rules/src/main/scala/fix/MatchParentheses.scala

diff --git a/input/src/main/scala-3/fix/MatchParenthesesTest.scala b/input/src/main/scala-3/fix/MatchParenthesesTest.scala
new file mode 100644
index 0000000..0452b77
--- /dev/null
+++ b/input/src/main/scala-3/fix/MatchParenthesesTest.scala
@@ -0,0 +1,18 @@
+/*
+rule = MatchParentheses
+ */
+package fix
+
+trait MatchParenthesesTest {
+  def f1(x: List[Int]): Int = (x match {
+    case Nil => ","
+    case _ => x.mkString(",")
+  }).length
+
+  def g(s: String): String
+
+  def f2(x: List[Int]): Int = g(x match {
+    case Nil => ","
+    case _ => x.mkString(",")
+  }).length
+}
diff --git a/output/src/main/scala-3/fix/MatchParenthesesTest.scala b/output/src/main/scala-3/fix/MatchParenthesesTest.scala
new file mode 100644
index 0000000..768c3a6
--- /dev/null
+++ b/output/src/main/scala-3/fix/MatchParenthesesTest.scala
@@ -0,0 +1,15 @@
+package fix
+
+trait MatchParenthesesTest {
+  def f1(x: List[Int]): Int = x .match {
+    case Nil => ","
+    case _ => x.mkString(",")
+  }.length
+
+  def g(s: String): String
+
+  def f2(x: List[Int]): Int = g(x match {
+    case Nil => ","
+    case _ => x.mkString(",")
+  }).length
+}
diff --git a/rules/src/main/scala/fix/MatchParentheses.scala b/rules/src/main/scala/fix/MatchParentheses.scala
new file mode 100644
index 0000000..46aca9e
--- /dev/null
+++ b/rules/src/main/scala/fix/MatchParentheses.scala
@@ -0,0 +1,34 @@
+package fix
+
+import scala.meta.Term
+import scala.meta.XtensionClassifiable
+import scala.meta.XtensionCollectionLikeUI
+import scala.meta.tokens.Token
+import scalafix.Patch
+import scalafix.v1.SyntacticDocument
+import scalafix.v1.SyntacticRule
+import scalafix.v1.XtensionOptionPatch
+import scalafix.v1.XtensionSeqPatch
+
+class MatchParentheses extends SyntacticRule("MatchParentheses") {
+  override def fix(implicit doc: SyntacticDocument): Patch = {
+    doc.tree.collect { case t: Term.Match =>
+      PartialFunction
+        .condOpt(doc.tokens.filter(_.pos.start >= t.pos.end).take(2)) { case Seq(r: Token.RightParen, _: Token.Dot) =>
+          PartialFunction
+            .condOpt(doc.tokens.filter(_.pos.end <= t.pos.start).takeRight(2)) {
+              case Seq(n, l: Token.LeftParen) if !n.is[Token.Ident] =>
+                Seq(
+                  Patch.removeToken(l),
+                  t.tokens.collectFirst { case m: Token.KwMatch =>
+                    Patch.addLeft(m, ".")
+                  }.asPatch,
+                  Patch.removeToken(r)
+                ).asPatch
+            }
+            .asPatch
+        }
+        .asPatch
+    }.asPatch
+  }
+}

From a7af0dca0393fdbdc29ff2ecf679b77608fae346 Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Fri, 3 Jan 2025 14:53:47 +0900
Subject: [PATCH 09/10] ForTupleMatch

(cherry picked from commit 8358702d1fe21bce080d1b5669200c77754ee89c)
---
 .../main/scala-3/fix/ForTupleMatchTest.scala  | 38 +++++++++++++++++++
 .../main/scala-3/fix/ForTupleMatchTest.scala  | 35 +++++++++++++++++
 rules/src/main/scala/fix/ForTupleMatch.scala  | 38 +++++++++++++++++++
 3 files changed, 111 insertions(+)
 create mode 100644 input/src/main/scala-3/fix/ForTupleMatchTest.scala
 create mode 100644 output/src/main/scala-3/fix/ForTupleMatchTest.scala
 create mode 100644 rules/src/main/scala/fix/ForTupleMatch.scala

diff --git a/input/src/main/scala-3/fix/ForTupleMatchTest.scala b/input/src/main/scala-3/fix/ForTupleMatchTest.scala
new file mode 100644
index 0000000..22a10b9
--- /dev/null
+++ b/input/src/main/scala-3/fix/ForTupleMatchTest.scala
@@ -0,0 +1,38 @@
+/*
+rule = ForTupleMatch
+ */
+package fix
+
+trait ForTupleMatchTest {
+  def x1: List[(Int, String)]
+  def x2: List[(Int, String, Boolean)]
+
+  def f0: List[(String, Int)] = for {
+    a <- x2
+    (b, c, _) = a
+  } yield (c, b)
+
+  def f1: List[(String, Int)] = for {
+    a <- x1
+    (b, c) = a
+  } yield (c, b)
+
+  def f2: List[((Int, String), Int)] = for {
+    a <- x1
+    (b, c) = a
+  } yield (a, b)
+
+  def f3: Unit = for {
+    a <- x1
+    (b, c) = a
+  } {
+    println(b)
+  }
+
+  def f4: Unit = for {
+    a <- x1
+    (b, c) = a
+  } {
+    println(a._2)
+  }
+}
diff --git a/output/src/main/scala-3/fix/ForTupleMatchTest.scala b/output/src/main/scala-3/fix/ForTupleMatchTest.scala
new file mode 100644
index 0000000..3def366
--- /dev/null
+++ b/output/src/main/scala-3/fix/ForTupleMatchTest.scala
@@ -0,0 +1,35 @@
+package fix
+
+trait ForTupleMatchTest {
+  def x1: List[(Int, String)]
+  def x2: List[(Int, String, Boolean)]
+
+  def f0: List[(String, Int)] = for {
+    (b, c, _) <- x2
+    
+  } yield (c, b)
+
+  def f1: List[(String, Int)] = for {
+    (b, c) <- x1
+    
+  } yield (c, b)
+
+  def f2: List[((Int, String), Int)] = for {
+    a <- x1
+    (b, c) = a
+  } yield (a, b)
+
+  def f3: Unit = for {
+    (b, c) <- x1
+    
+  } {
+    println(b)
+  }
+
+  def f4: Unit = for {
+    a <- x1
+    (b, c) = a
+  } {
+    println(a._2)
+  }
+}
diff --git a/rules/src/main/scala/fix/ForTupleMatch.scala b/rules/src/main/scala/fix/ForTupleMatch.scala
new file mode 100644
index 0000000..2277fc6
--- /dev/null
+++ b/rules/src/main/scala/fix/ForTupleMatch.scala
@@ -0,0 +1,38 @@
+package fix
+
+import scala.meta.Enumerator
+import scala.meta.Pat
+import scala.meta.Term
+import scala.meta.XtensionCollectionLikeUI
+import scalafix.Patch
+import scalafix.v1.SyntacticDocument
+import scalafix.v1.SyntacticRule
+import scalafix.v1.XtensionSeqPatch
+
+class ForTupleMatch extends SyntacticRule("ForTupleMatch") {
+  override def fix(implicit doc: SyntacticDocument): Patch = {
+    doc.tree.collect {
+      case t: Term.For =>
+        t
+      case t: Term.ForYield =>
+        t
+    }.map { t =>
+      t.enums
+        .zip(t.enums.drop(1))
+        .collect {
+          case (
+                Enumerator.Generator(Pat.Var(tuple1: Term.Name), _),
+                tupleVal @ Enumerator.Val(
+                  extracted: Pat.Tuple,
+                  Term.Name(tuple2)
+                )
+              ) if tuple1.value == tuple2 && (t.collect { case Term.Name(x) if x == tuple1.value => () }.size == 2) =>
+            Seq(
+              Patch.replaceTree(tuple1, extracted.toString),
+              Patch.removeTokens(tupleVal.tokens)
+            ).asPatch
+        }
+        .asPatch
+    }.asPatch
+  }
+}

From bcf990cf7bb4c63fd518d989a2a664bc18285bef Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Fri, 3 Jan 2025 15:19:38 +0900
Subject: [PATCH 10/10] UsingParamAnonymousConstructor

(cherry picked from commit 04ab3aceaa4c3aa8c5178c40cb34f075a5935067)
---
 .../UsingParamAnonymousConstructorTest.scala  | 18 ++++++++
 .../UsingParamAnonymousConstructorTest.scala  | 15 +++++++
 .../fix/UsingParamAnonymousConstructor.scala  | 41 +++++++++++++++++++
 3 files changed, 74 insertions(+)
 create mode 100644 input/src/main/scala-3/fix/UsingParamAnonymousConstructorTest.scala
 create mode 100644 output/src/main/scala-3/fix/UsingParamAnonymousConstructorTest.scala
 create mode 100644 rules/src/main/scala/fix/UsingParamAnonymousConstructor.scala

diff --git a/input/src/main/scala-3/fix/UsingParamAnonymousConstructorTest.scala b/input/src/main/scala-3/fix/UsingParamAnonymousConstructorTest.scala
new file mode 100644
index 0000000..46ee0b0
--- /dev/null
+++ b/input/src/main/scala-3/fix/UsingParamAnonymousConstructorTest.scala
@@ -0,0 +1,18 @@
+/*
+rule = UsingParamAnonymousConstructor
+ */
+package fix
+
+trait UsingParamAnonymousConstructorTest {
+  class A1(using x1: Int)
+
+  class A2(using x1: Int) {
+    def f: Int = x1
+  }
+
+  trait B1(using x1: Int)
+
+  trait B2(using x1: Int) {
+    def f: Int = x1
+  }
+}
diff --git a/output/src/main/scala-3/fix/UsingParamAnonymousConstructorTest.scala b/output/src/main/scala-3/fix/UsingParamAnonymousConstructorTest.scala
new file mode 100644
index 0000000..d78875b
--- /dev/null
+++ b/output/src/main/scala-3/fix/UsingParamAnonymousConstructorTest.scala
@@ -0,0 +1,15 @@
+package fix
+
+trait UsingParamAnonymousConstructorTest {
+  class A1(using  Int)
+
+  class A2(using x1: Int) {
+    def f: Int = x1
+  }
+
+  trait B1(using  Int)
+
+  trait B2(using x1: Int) {
+    def f: Int = x1
+  }
+}
diff --git a/rules/src/main/scala/fix/UsingParamAnonymousConstructor.scala b/rules/src/main/scala/fix/UsingParamAnonymousConstructor.scala
new file mode 100644
index 0000000..2936d23
--- /dev/null
+++ b/rules/src/main/scala/fix/UsingParamAnonymousConstructor.scala
@@ -0,0 +1,41 @@
+package fix
+
+import scala.meta.Mod
+import scala.meta.Stat
+import scala.meta.Term
+import scala.meta.XtensionClassifiable
+import scala.meta.XtensionCollectionLikeUI
+import scala.meta.tokens.Token
+import scalafix.Patch
+import scalafix.v1.SyntacticDocument
+import scalafix.v1.SyntacticRule
+import scalafix.v1.XtensionSeqPatch
+
+class UsingParamAnonymousConstructor extends SyntacticRule("UsingParamAnonymousConstructor") {
+  override def fix(implicit doc: SyntacticDocument): Patch = {
+    doc.tree.collect { case c: Stat.WithCtor =>
+      val t = c.ctor
+      t.paramClauses.filter { paramClause =>
+        paramClause.values.forall(_.mods.exists(_.is[Mod.Using])) && paramClause.values.forall(m =>
+          !m.mods.exists(_.is[Mod.Inline]) && !m.mods.exists(_.is[Mod.Annot])
+        )
+      }.map { paramClause =>
+        val countOneNames = c.collect { case x: Term.Name =>
+          x.value
+        }.groupBy(identity).filter(_._2.size == 1).keySet
+        if (paramClause.values.forall(a => countOneNames(a.name.value))) {
+          paramClause.values
+            .map(p =>
+              Seq(
+                Patch.removeTokens(p.name.tokens),
+                Patch.removeToken(p.tokens.find(_.is[Token.Colon]).get)
+              ).asPatch
+            )
+            .asPatch
+        } else {
+          Patch.empty
+        }
+      }.asPatch
+    }.asPatch
+  }
+}