Merge pull request #111 from unkarjedy/main

fix deprecation warnings

Author: julienrf

build.sbt

@@ -5,5 +5,6 @@ lazy val root = project
     description := "Example sbt project that compiles using Scala 3",
     version := "0.1.0",
     scalaVersion := "3.1.3",
+    scalacOptions ++= Seq("-deprecation"),
     libraryDependencies += "org.scalameta" %% "munit" % "0.7.29" % Test
   )

src/main/scala/GivenInstances.scala

@@ -12,17 +12,17 @@ object GivenInstances:
 
     def apply[A](using parser: StringParser[A]): StringParser[A] = parser
 
-    private def baseParser[A](f: String ⇒ Try[A]): StringParser[A] = new StringParser[A] {
+    private def baseParser[A](f: String => Try[A]): StringParser[A] = new StringParser[A] {
       override def parse(s: String): Try[A] = f(s)
     }
 
     given stringParser: StringParser[String] = baseParser(Success(_))
-    given intParser: StringParser[Int] = baseParser(s ⇒ Try(s.toInt))
+    given intParser: StringParser[Int] = baseParser(s => Try(s.toInt))
 
     given optionParser[A](using parser: => StringParser[A]): StringParser[Option[A]] = new StringParser[Option[A]] {
       override def parse(s: String): Try[Option[A]] = s match
-        case "" ⇒ Success(None) // implicit parser not used.
-        case str ⇒ parser.parse(str).map(x ⇒ Some(x)) // implicit parser is evaluated at here
+        case "" => Success(None) // implicit parser not used.
+        case str => parser.parse(str).map(x => Some(x)) // implicit parser is evaluated at here
     }
 
   def test(): Unit =