Don't emit SPCH1002 if property has ColumnIgnore attribute

SpreadCheetah.SourceGenerator.SnapshotTest/Tests/ColumnIgnoreTests.cs

@@ -55,4 +55,32 @@ public partial class MyGenRowContext : WorksheetRowContext;
         // Act & Assert
         return context.RunAsync();
     }
+
+    [Fact]
+    public Task ColumnIgnore_IgnorePropertyOfUnsupportedType()
+    {
+        // Arrange
+        var context = AnalyzerTest.CreateContext();
+        context.TestCode = """
+            using SpreadCheetah.SourceGeneration;
+            using System;
+            using System.Diagnostics;
+
+            namespace MyNamespace;
+
+            public class ClassWithUnsupportedProperty
+            {
+                [ColumnIgnore] // SPCH1002 without this attribute
+                public Stopwatch? Stopwatch { get; set; }
+
+                public int Value { get; set; }
+            }
+
+            [WorksheetRow(typeof(ClassWithUnsupportedProperty))]
+            public partial class MyGenRowContext : WorksheetRowContext;
+            """;
+
+        // Act & Assert
+        return context.RunAsync();
+    }
 }

SpreadCheetah.SourceGenerator.SnapshotTest/Tests/PropertyTypeTests.cs

@@ -16,9 +16,12 @@ public Task PropertyType_ClassWithUnsupportedProperty()
 
             namespace MyNamespace;
 
-            public record RecordWithUnsupportedProperty(Uri HomepageUri);
+            public class ClassWithUnsupportedProperty
+            {
+                public System.Diagnostics.Stopwatch? Stopwatch { get; set; }
+            }
 
-            [WorksheetRow({|SPCH1002:typeof(RecordWithUnsupportedProperty)|})]
+            [WorksheetRow({|SPCH1002:typeof(ClassWithUnsupportedProperty)|})]
             public partial class MyGenRowContext : WorksheetRowContext;
             """;
 
@@ -36,10 +39,13 @@ public Task PropertyType_ClassWithUnsupportedPropertyAndWarningsSuppressed()
             using System;
 
             namespace MyNamespace;
-
-            public record RecordWithUnsupportedProperty(Uri HomepageUri);
 
-            [WorksheetRow(typeof(RecordWithUnsupportedProperty))]
+            public class ClassWithUnsupportedProperty
+            {
+                public System.Diagnostics.Stopwatch? Stopwatch { get; set; }
+            }
+
+            [WorksheetRow(typeof(ClassWithUnsupportedProperty))]
             [WorksheetRowGenerationOptions(SuppressWarnings = true)]
             public partial class MyGenRowContext : WorksheetRowContext;
             """;

SpreadCheetah.SourceGenerator/Extensions/SymbolExtensions.cs

@@ -120,9 +120,14 @@ private static bool TryGetInheritedColumnOrderingAttribute(this AttributeData at
         return true;
     }
 
-    public static AttributeData? GetCellValueConverterAttribute(this IPropertySymbol property)
+    public static bool HasCellValueConverterAttribute(this IPropertySymbol property)
     {
-        return property.GetAttribute(Attributes.CellValueConverter);
+        return property.GetAttribute(Attributes.CellValueConverter) is not null;
+    }
+
+    public static bool HasColumnIgnoreAttribute(this IPropertySymbol property)
+    {
+        return property.GetAttribute(Attributes.ColumnIgnore) is not null;
     }
 
     public static AttributeData? GetColumnOrderAttribute(this IPropertySymbol property)

SpreadCheetah.SourceGenerator/WorksheetRowAnalyzer.cs

@@ -69,8 +69,9 @@ private static void AnalyzeContextType(SymbolAnalysisContext context)
             {
                 hasProperties = true;
 
-                var cellValueConverter = property.GetCellValueConverterAttribute();
-                if (cellValueConverter is not null)
+                if (property.HasColumnIgnoreAttribute())
+                    continue;
+                if (property.HasCellValueConverterAttribute())
                     continue;
                 if (property.Type.IsSupportedType())
                     continue;