Marked incomplete declarations even if their completions cannot be found.

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

src/CppParser/Parser.cpp

@@ -1148,11 +1148,11 @@ ClassTemplate* Parser::WalkClassTemplate(const clang::ClassTemplateDecl* TD)
         return CT;
 
     CT = new ClassTemplate();
-    if (!TD->isThisDeclarationADefinition() &&
-        TD->getCanonicalDecl()->isThisDeclarationADefinition())
+    if (!TD->isThisDeclarationADefinition())
     {
         CT->IsIncomplete = true;
-        CT->CompleteDeclaration = WalkClassTemplate(TD->getCanonicalDecl());
+        if (TD->getCanonicalDecl()->isThisDeclarationADefinition())
+            CT->CompleteDeclaration = WalkClassTemplate(TD->getCanonicalDecl());
     }
     HandleDeclaration(TD, CT);
 
@@ -1374,11 +1374,11 @@ FunctionTemplate* Parser::WalkFunctionTemplate(const clang::FunctionTemplateDecl
                                             /*AddToNamespace=*/false);
 
     FT = new FunctionTemplate();
-    if (!TD->isThisDeclarationADefinition() &&
-        TD->getCanonicalDecl()->isThisDeclarationADefinition())
+    if (!TD->isThisDeclarationADefinition())
     {
         FT->IsIncomplete = true;
-        FT->CompleteDeclaration = WalkFunctionTemplate(TD->getCanonicalDecl());
+        if (TD->getCanonicalDecl()->isThisDeclarationADefinition())
+            FT->CompleteDeclaration = WalkFunctionTemplate(TD->getCanonicalDecl());
     }
     HandleDeclaration(TD, FT);
 

src/Generator/Passes/ResolveIncompleteDeclsPass.cs

@@ -20,7 +20,7 @@ namespace CppSharp.Passes
             if (!base.VisitClassTemplateDecl(template))
                 return false;
 
-            if (template.IsIncomplete)
+            if (template.IsIncomplete && template.CompleteDeclaration != null)
             {
                 var completeDeclaration = (ClassTemplate) template.CompleteDeclaration;
                 foreach (var specialization in template.Specializations.Where(