From c8f0f52b4449364c75530954efd306228450fc40 Mon Sep 17 00:00:00 2001
From: nojaf <florian.verdonck@outlook.com>
Date: Sun, 4 Apr 2021 14:15:16 +0200
Subject: [PATCH] Print trivia for SynExpr.Paren in alternate style. Fixes
 #1276.

---
 src/Fantomas.Tests/AppTests.fs | 46 ++++++++++++++++++++++++++++++++++
 src/Fantomas/CodePrinter.fs    |  1 +
 2 files changed, 47 insertions(+)

diff --git a/src/Fantomas.Tests/AppTests.fs b/src/Fantomas.Tests/AppTests.fs
index a9ed4c9823..61851843a4 100644
--- a/src/Fantomas.Tests/AppTests.fs
+++ b/src/Fantomas.Tests/AppTests.fs
@@ -580,3 +580,49 @@ module SomeModule =
 
         initialAbs / 100
 """
+
+[<Test>]
+let ``comment after app with single tuple arg, 1276`` () =
+    formatSourceString
+        false
+        """
+SomeFunction(arg1,
+    arg2,
+    arg3) // does something
+SomeOtherFunction(arg1, arg2) // does another thing
+"""
+        config
+    |> prepend newline
+    |> should
+        equal
+        """
+SomeFunction(arg1, arg2, arg3) // does something
+SomeOtherFunction(arg1, arg2) // does another thing
+"""
+
+[<Test>]
+let ``comment after app with single tuple arg, multiline format`` () =
+    formatSourceString
+        false
+        """
+SomeFunction(arg1,
+    arg2,
+    arg3) // does something
+SomeOtherFunction(arg1, arg2) // does another thing
+"""
+        { config with MaxLineLength = 20 }
+    |> prepend newline
+    |> should
+        equal
+        """
+SomeFunction(
+    arg1,
+    arg2,
+    arg3
+) // does something
+
+SomeOtherFunction(
+    arg1,
+    arg2
+) // does another thing
+"""
diff --git a/src/Fantomas/CodePrinter.fs b/src/Fantomas/CodePrinter.fs
index 43b2737c8e..665920c835 100644
--- a/src/Fantomas/CodePrinter.fs
+++ b/src/Fantomas/CodePrinter.fs
@@ -2849,6 +2849,7 @@ and genMultilineFunctionApplicationArguments sepOpenTFor sepCloseTFor astContext
         +> unindent
         +> sepNln
         +> sepCloseTFor rpr pr
+        |> genTriviaFor SynExpr_Paren pr
 
     let genExpr astContext e =
         match e with