Made the generation of templates optional and off by default.

Templates are still experimental and we don't have automatic compilation of C++ symbols so it's risky to always have them enabled.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

src/Generator/Options.cs

@@ -92,6 +92,13 @@ namespace CppSharp
 
         public bool OutputInteropIncludes;
         public bool GenerateFunctionTemplates;
+        /// <summary>
+        /// C# only: gets or sets a value indicating whether to generate class templates.
+        /// </summary>
+        /// <value>
+        ///   <c>true</c> to generate class templates; otherwise, <c>false</c>.
+        /// </value>
+        public bool GenerateClassTemplates { get; set; } = false;
         public bool GenerateInternalImports;
         public bool GenerateSequentialLayout { get; set; }
         public bool UseHeaderDirectories;

src/Generator/Passes/CheckIgnoredDecls.cs

@@ -39,18 +39,12 @@ namespace CppSharp.Passes
             if (!@class.IsDependent)
                 return false;
 
-            if (Options.IsCLIGenerator || @class.TranslationUnit.IsSystemHeader ||
-                @class.Specializations.Count == 0)
-            {
-                bool hasExplicitlyGeneratedSpecializations = false;
-                foreach (var specialization in @class.Specializations)
-                    if (specialization.IsExplicitlyGenerated)
-                        hasExplicitlyGeneratedSpecializations = true;
-                    else
-                        specialization.ExplicitlyIgnore();
-                if (!hasExplicitlyGeneratedSpecializations)
-                    @class.ExplicitlyIgnore();
-            }
+            if (Options.GenerateClassTemplates)
+                IgnoreUnsupportedTemplates(@class);
+            else
+                foreach (var specialization in @class.Specializations.Where(
+                    s => !s.IsExplicitlyGenerated))
+                    specialization.ExplicitlyIgnore();
 
             return true;
         }
@@ -350,11 +344,11 @@ namespace CppSharp.Passes
 
         #region Helpers
 
-        /// <remarks>
+        /// <summary>
         /// Checks if a given type is invalid, which can happen for a number of
         /// reasons: incomplete definitions, being explicitly ignored, or also
         /// by being a type we do not know how to handle.
-        /// </remarks>
+        /// </summary>
         private bool HasInvalidType(Type type, Module module, out string msg)
         {
             if (type == null)
@@ -459,6 +453,22 @@ namespace CppSharp.Passes
             return TypeMaps.FindTypeMap(decl, out typeMap) ? typeMap.IsIgnored : decl.Ignore;
         }
 
+        private void IgnoreUnsupportedTemplates(Class @class)
+        {
+            if (!Options.IsCLIGenerator && !@class.TranslationUnit.IsSystemHeader &&
+                @class.Specializations.Count > 0)
+                return;
+
+            bool hasExplicitlyGeneratedSpecializations = false;
+            foreach (var specialization in @class.Specializations)
+                if (specialization.IsExplicitlyGenerated)
+                    hasExplicitlyGeneratedSpecializations = true;
+                else
+                    specialization.ExplicitlyIgnore();
+            if (!hasExplicitlyGeneratedSpecializations)
+                @class.ExplicitlyIgnore();
+        }
+
         #endregion
 
         private HashSet<Declaration> injectedClasses = new HashSet<Declaration>();

src/Generator/Passes/ConstructorToConversionOperatorPass.cs

@@ -26,7 +26,8 @@ namespace CppSharp.Passes
             {
                 var nonDefaultParams = @params.Count(p => p.DefaultArgument == null ||
                     (p.DefaultArgument.Class == StatementClass.Call &&
-                     p.DefaultArgument.Declaration.Ignore));
+                     (p.DefaultArgument.Declaration == null ||
+                      p.DefaultArgument.Declaration.Ignore)));
                 if (nonDefaultParams > 1)
                     return false;   
             }

tests/CSharp/CSharp.cs

@@ -26,6 +26,7 @@ namespace CppSharp.Tests
             driver.Context.TranslationUnitPasses.AddPass(new TestAttributesPass());
             driver.Options.MarshalCharAsManagedChar = true;
             driver.Options.GenerateDefaultValuesForArguments = true;
+            driver.Options.GenerateClassTemplates = true;
         }
 
         public override void Preprocess(Driver driver, ASTContext ctx)