Fix analyzer RCS0053 - preprocessor directive

ChangeLog.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Fix analyzer [RCS0053](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS0053) ([PR](https://github.com/dotnet/roslynator/pull/1547))
+
 ## [4.12.7] - 2024-10-01
 
 ### Fixed

src/Common/CSharp/SyntaxTriviaAnalysis.cs

@@ -226,9 +226,12 @@ public static IEnumerable<IndentationInfo> FindIndentations(SyntaxNode node, Tex
     {
         foreach (SyntaxTrivia trivia in node.DescendantTrivia(span))
         {
-            if (trivia.IsKind(SyntaxKind.EndOfLineTrivia, SyntaxKind.SingleLineDocumentationCommentTrivia))
+            if (trivia.IsKind(SyntaxKind.EndOfLineTrivia, SyntaxKind.SingleLineDocumentationCommentTrivia)
+                || SyntaxFacts.IsPreprocessorDirective(trivia.Kind()))
             {
-                int position = trivia.Span.End;
+                int position = (SyntaxFacts.IsPreprocessorDirective(trivia.Kind()))
+                    ? trivia.FullSpan.End
+                    : trivia.Span.End;
 
                 if (span.Contains(position))
                 {

src/Tests/Formatting.Analyzers.Tests/RCS0053FixFormattingOfListTests.cs

@@ -1111,6 +1111,48 @@ void M()
 """);
     }
 
+    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.FixFormattingOfList)]
+    public async Task Test_Multiline_PreprocessorDirectives()
+    {
+        await VerifyDiagnosticAndFixAsync("""
+#define FOO
+using System.Collections.Generic;
+
+class C
+{
+    void M()
+    {
+        var x = new List<string>([|new string[]
+            {
+                "",
+                "",
+#if FOO
+                "",
+#endif
+            }|]);
+    }
+}
+""", """
+#define FOO
+using System.Collections.Generic;
+
+class C
+{
+    void M()
+    {
+        var x = new List<string>(new string[]
+        {
+            "",
+            "",
+#if FOO
+            "",
+#endif
+        });
+    }
+}
+""");
+    }
+
     [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.FixFormattingOfList)]
     public async Task TestNoDiagnostic_Singleline()
     {