From 761e2b1a65d40ffc8f8b6912e44c4fcfdb164b6f Mon Sep 17 00:00:00 2001
From: Raul Santos <raulsntos@gmail.com>
Date: Sun, 28 Aug 2022 18:16:57 +0200
Subject: C#: Ignore property indexers and report if exported

Ignore property indexers since they are unsupported and report a
diagnostic if an user tries to export it.
---
 .../Godot.NET.Sdk/Godot.SourceGenerators/Common.cs | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/Common.cs')

diff --git a/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/Common.cs b/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/Common.cs
index 3dfa8000ba..e28788ec0b 100644
--- a/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/Common.cs
+++ b/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/Common.cs
@@ -168,6 +168,32 @@ namespace Godot.SourceGenerators
                 location?.SourceTree?.FilePath));
         }
 
+        public static void ReportExportedMemberIsIndexer(
+            GeneratorExecutionContext context,
+            ISymbol exportedMemberSymbol
+        )
+        {
+            var locations = exportedMemberSymbol.Locations;
+            var location = locations.FirstOrDefault(l => l.SourceTree != null) ?? locations.FirstOrDefault();
+
+            string message = $"Attempted to export indexer property: " +
+                             $"'{exportedMemberSymbol.ToDisplayString()}'";
+
+            string description = $"{message}. Indexer properties can't be exported." +
+                                 " Remove the '[Export]' attribute.";
+
+            context.ReportDiagnostic(Diagnostic.Create(
+                new DiagnosticDescriptor(id: "GD0105",
+                    title: message,
+                    messageFormat: message,
+                    category: "Usage",
+                    DiagnosticSeverity.Error,
+                    isEnabledByDefault: true,
+                    description),
+                location,
+                location?.SourceTree?.FilePath));
+        }
+
         public static void ReportSignalDelegateMissingSuffix(
             GeneratorExecutionContext context,
             INamedTypeSymbol delegateSymbol)
-- 
cgit v1.2.3