Add GenConstructorIgnore attribute

UnityAttributes/GenConstructor/GenConstructorGenerator.IgnoreAttribute.cs

@@ -0,0 +1,16 @@
+using UnityAttributes.Common;
+
+namespace UnityAttributes.GenConstructor;
+
+public partial class GenConstructorGenerator {
+  public const string IgnoreAttributeName = "GenConstructorIgnoreAttribute";
+  readonly string ignoreAttributeText = @$"{Const.AutoGeneratedText}
+
+{generatedCodeAttribute}
+[global::System.AttributeUsage(global::System.AttributeTargets.Field, Inherited = true, AllowMultiple = false)]
+internal sealed class {IgnoreAttributeName} : global::System.Attribute
+{{
+  public {IgnoreAttributeName}() {{ }}
+}}
+";
+}

UnityAttributes/GenConstructor/GenConstructorGenerator.cs

@@ -17,7 +17,10 @@ public partial class GenConstructorGenerator : ISourceGenerator
 
   public void Initialize(GeneratorInitializationContext context)
   {
-    context.RegisterForPostInitialization(i => i.AddSource($"{AttributeName}.g.cs", attributeText));
+    context.RegisterForPostInitialization(i => { 
+      i.AddSource($"{AttributeName}.g.cs", attributeText);
+      i.AddSource($"{IgnoreAttributeName}.g.cs", ignoreAttributeText);
+    });
     context.RegisterForSyntaxNotifications(() => new SyntaxReceiver());
   }
 
@@ -113,11 +116,9 @@ public void OnVisitSyntaxNode(GeneratorSyntaxContext context)
     );
 
     var haveAttribute =
-      classSymbol != null
-      && classSymbol.GetAttributes().Any(ad =>
-        ad.AttributeClass != null
-        && ad.AttributeClass.ToDisplayString() == GenConstructorGenerator.AttributeName
-      );
+      classSymbol?.GetAttributes().Any(ad =>
+        ad.AttributeClass?.ToDisplayString() == GenConstructorGenerator.AttributeName
+      ) ?? false;
 
     if (haveAttribute)
     {
@@ -126,9 +127,18 @@ public void OnVisitSyntaxNode(GeneratorSyntaxContext context)
         .OfType<FieldDeclarationSyntax>()
         .SelectMany(field => field.Declaration.Variables)
         .Select(variable => Unsafe.As<IFieldSymbol>(context.SemanticModel.GetDeclaredSymbol(variable)))
+        .Where(checkForIgnoreAttribute)
         .ToArray();
 
       classes.Add((classSymbol, fields));
     }
+
+    return;
+
+    bool checkForIgnoreAttribute(IFieldSymbol fieldSymbol) {
+      var haveIgnoreAttribute = fieldSymbol?.GetAttributes()
+        .Any(ad => ad.AttributeClass?.ToDisplayString() == GenConstructorGenerator.IgnoreAttributeName) ?? false;
+      return !haveIgnoreAttribute;
+    }
   }
 }

UnityAttributes/UnityAttributes.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <Version>1.1.1.0</Version>
+        <Version>1.1.2.0</Version>
         <TargetFramework>netstandard2.0</TargetFramework>
         <RootNamespace>UnityAttributes</RootNamespace>
         <LangVersion>latest</LangVersion>