Merge pull request fsprojects#3217 from nojaf/fix-2468

Add regression test for long delegate

Author: nojaf

CHANGELOG.md

@@ -12,6 +12,7 @@
 - Trivia around paren lambda with conditional compilation no longer causes merge error. [#2844](https://github.com/fsprojects/fantomas/issues/2844)
 - Type app closing angle bracket padded by previous expression length. [#3179](https://github.com/fsprojects/fantomas/issues/3179)
 - Dynamic operator on result of qualified function call causes formatting error. [#3135](https://github.com/fsprojects/fantomas/issues/3135)
+- Long delegate type with generic args no longer breaks around arrow. [#2468](https://github.com/fsprojects/fantomas/issues/2468)
 
 ## [8.0.0-alpha-002] - 2025-12-15
 

src/Fantomas.Core.Tests/TypeDeclarationTests.fs

@@ -723,6 +723,21 @@ type SomeWin32Callback =
             bool
 """
 
+[<Test>]
+let ``long delegate with generic args should not break around arrow, 2468`` () =
+    formatSourceString
+        """
+type some_delegate = delegate of Func<int, int> * Guid * string * Func<Func<int, int>, int> -> Func<Func<int, int>, string, string>
+"""
+        config
+    |> prepend newline
+    |> should
+        equal
+        """
+type some_delegate =
+    delegate of Func<int, int> * Guid * string * Func<Func<int, int>, int> -> Func<Func<int, int>, string, string>
+"""
+
 [<Test>]
 let ``should keep the ? in optional parameters`` () =
     formatSourceString