From febc3b687183997570ba410a6881956e906a01b4 Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Sun, 24 Dec 2023 15:07:50 +0900
Subject: [PATCH] EtaExpansionRewrite

---
 .../src/main/scala/fix/EtaExpansionRewrite.scala  | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 rules/src/main/scala/fix/EtaExpansionRewrite.scala

diff --git a/rules/src/main/scala/fix/EtaExpansionRewrite.scala b/rules/src/main/scala/fix/EtaExpansionRewrite.scala
new file mode 100644
index 0000000..9112797
--- /dev/null
+++ b/rules/src/main/scala/fix/EtaExpansionRewrite.scala
@@ -0,0 +1,15 @@
+package fix
+
+import scala.meta.Term
+import scalafix.Patch
+import scalafix.v1.SyntacticDocument
+import scalafix.v1.SyntacticRule
+import scala.meta.tokens.Token
+
+class EtaExpansionRewrite extends SyntacticRule("EtaExpansionRewrite") {
+  override def fix(implicit doc: SyntacticDocument): Patch = {
+    doc.tree.collect { case t @ Term.Eta(x) =>
+      t.tokens.reverseIterator.find(_.is[Token.Underscore]).filter(_.start > x.pos.end).map(Patch.removeToken).asPatch
+    }.asPatch
+  }
+}