Fix generation of operators in NAPI generator.

src/Generator/Generators/C/CppSources.cs

@@ -181,7 +181,7 @@ namespace CppSharp.Generators.Cpp
 
         public virtual void GenerateClassMethods(Class @class)
         {
-            foreach (var method in @class.Methods.Where(m => !m.IsOperator))
+            foreach (var method in @class.Methods)
             {
                 if (ASTUtils.CheckIgnoreMethod(method) || CppHeaders.FunctionIgnored(method))
                     continue;

src/Generator/Generators/NAPI/NAPIHelpers.cs

@@ -22,6 +22,9 @@ namespace CppSharp.Generators.Cpp
 
         public override void VisitDeclContextFunctions(DeclarationContext context)
         {
+            if (!VisitOptions.VisitNamespaceFunctions)
+                return;
+
             var functions = context.Functions.Where(f => !ASTUtils.CheckIgnoreFunction(f)).ToList();
             var unique = functions.GroupBy(m => m.Name);
             foreach (var group in unique)
@@ -46,6 +49,7 @@ namespace CppSharp.Generators.Cpp
         {
             var constructors = @class.Constructors.Where(c => c.IsGenerated && !c.IsCopyConstructor)
                 .ToList();
+
             if (!constructors.Any())
                 return;
 
@@ -57,12 +61,14 @@ namespace CppSharp.Generators.Cpp
             if (!function.IsGenerated)
                 return false;
 
-            if (function is Method method)
-            {
+            if (!(function is Method method))
+                return true;
+
             if (method.IsConstructor || method.IsDestructor)
                 return false;
 
             if (method.IsOperator)
+            {
                 if (method.OperatorKind == CXXOperatorKind.Conversion ||
                     method.OperatorKind == CXXOperatorKind.Equal)
                     return false;