Always keep default constructors in the AST

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

src/CppParser/Parser.cpp

@@ -1779,11 +1779,11 @@ Method* Parser::WalkMethodCXX(const clang::CXXMethodDecl* MD)
     const clang::CXXConstructorDecl* Ctor;
     if (opts->skipPrivateDeclarations &&
         MD->getAccess() == clang::AccessSpecifier::AS_private &&
+        !MD->isVirtual() &&
         !MD->isCopyAssignmentOperator() &&
         !MD->isMoveAssignmentOperator() &&
         (!(Ctor = llvm::dyn_cast<clang::CXXConstructorDecl>(MD)) ||
-         !Ctor->isCopyOrMoveConstructor()) &&
-        !MD->isVirtual())
+         (!Ctor->isDefaultConstructor() && !Ctor->isCopyOrMoveConstructor())))
         return nullptr;
 
     using namespace clang;

src/Generator.Tests/AST/TestAST.cs

@@ -607,6 +607,7 @@ namespace CppSharp.Generator.Tests.AST
         public void TestPrivateCCtorCopyAssignment()
         {
             Class @class = AstContext.FindCompleteClass("HasPrivateCCtorCopyAssignment");
+            Assert.That(@class.Constructors.Any(c => c.Parameters.Count == 0), Is.True);
             Assert.That(@class.Constructors.Any(c => c.IsCopyConstructor), Is.True);
             Assert.That(@class.Methods.Any(o => o.OperatorKind == CXXOperatorKind.Equal), Is.True);
         }

tests/Native/AST.h

@@ -241,6 +241,7 @@ class ClassC;
 class HasPrivateCCtorCopyAssignment
 {
 private:
+    HasPrivateCCtorCopyAssignment() = delete;
     HasPrivateCCtorCopyAssignment(const HasPrivateCCtorCopyAssignment&) = delete;
     HasPrivateCCtorCopyAssignment& operator=(const HasPrivateCCtorCopyAssignment&) = delete;
 };