From 47cf808e8f67c2aaca1b01734fd4a59c8cdf9726 Mon Sep 17 00:00:00 2001
From: jilen <jilen.zhang@gmail.com>
Date: Sun, 29 Dec 2024 20:19:07 +0800
Subject: [PATCH] simplify typeclass

---
 src/main/scala/minisql/util/Show.scala | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/src/main/scala/minisql/util/Show.scala b/src/main/scala/minisql/util/Show.scala
index b4acc97..3496caf 100644
--- a/src/main/scala/minisql/util/Show.scala
+++ b/src/main/scala/minisql/util/Show.scala
@@ -1,21 +1,20 @@
 package minisql.util
 
-object Show {
-  trait Show[T] {
-    def show(v: T): String
+trait Show[T] {
+  extension (v: T) {
+    def show: String
   }
+}
 
-  object Show {
-    def apply[T](f: T => String) = new Show[T] {
-      def show(v: T) = f(v)
+object Show {
+
+  def apply[T](f: T => String) = new Show[T] {
+    extension (v: T) {
+      def show: String = f(v)
     }
   }
 
-  implicit class Shower[T](v: T)(implicit shower: Show[T]) {
-    def show = shower.show(v)
-  }
-
-  implicit def listShow[T](implicit shower: Show[T]): Show[List[T]] =
+  given listShow[T](using shower: Show[T]): Show[List[T]] =
     Show[List[T]] {
       case list => list.map(_.show).mkString(", ")
     }