diff --git a/src/AST/Method.cs b/src/AST/Method.cs
index 557ba730..c2216eba 100644
--- a/src/AST/Method.cs
+++ b/src/AST/Method.cs
@@ -88,6 +88,7 @@ namespace CppSharp.AST
             IsImplicit = method.IsImplicit;
             IsOverride = method.IsOverride;
             IsProxy = method.IsProxy;
+            IsStatic = method.IsStatic;
             Kind = method.Kind;
             IsDefaultConstructor = method.IsDefaultConstructor;
             IsCopyConstructor = method.IsCopyConstructor;
diff --git a/src/AST/Statement.cs b/src/AST/Statement.cs
index b1ae1985..3f8e1a68 100644
--- a/src/AST/Statement.cs
+++ b/src/AST/Statement.cs
@@ -3,8 +3,10 @@
     public enum StatementClass
     {
         Any,
+        BinaryOperator,
         DeclarationReference,
-        ConstructorReference
+        ConstructorReference,
+        CXXOperatorCall
     }
 
     public abstract class Statement
diff --git a/src/Core/Parser/ASTConverter.cs b/src/Core/Parser/ASTConverter.cs
index 6a09a77f..4197a82d 100644
--- a/src/Core/Parser/ASTConverter.cs
+++ b/src/Core/Parser/ASTConverter.cs
@@ -849,12 +849,18 @@ namespace CppSharp
             expression.String = statement.String;
             switch (statement.Class)
             {
+                case StatementClass.BinaryOperator:
+                    expression.Class = AST.StatementClass.BinaryOperator;
+                    break;
                 case StatementClass.DeclRefExprClass:
                     expression.Class = AST.StatementClass.DeclarationReference;
                     break;
                 case StatementClass.CXXConstructExprClass:
                     expression.Class = AST.StatementClass.ConstructorReference;
                     break;
+                case StatementClass.CXXOperatorCallExpr:
+                    expression.Class = AST.StatementClass.CXXOperatorCall;
+                    break;
             }
             return expression;
         }
diff --git a/src/CppParser/AST.h b/src/CppParser/AST.h
index 98a7024c..fed306ea 100644
--- a/src/CppParser/AST.h
+++ b/src/CppParser/AST.h
@@ -458,8 +458,10 @@ public:
 enum class StatementClass
 {
     Any,
+    BinaryOperator,
     DeclRefExprClass,
-    CXXConstructExprClass
+    CXXConstructExprClass,
+    CXXOperatorCallExpr
 };
 
 class CS_API Statement
diff --git a/src/CppParser/Bindings/CLI/AST.h b/src/CppParser/Bindings/CLI/AST.h
index 4403ad43..47e2c2ef 100644
--- a/src/CppParser/Bindings/CLI/AST.h
+++ b/src/CppParser/Bindings/CLI/AST.h
@@ -210,8 +210,10 @@ namespace CppSharp
             public enum struct StatementClass
             {
                 Any = 0,
-                DeclRefExprClass = 1,
-                CXXConstructExprClass = 2
+                BinaryOperator = 1,
+                DeclRefExprClass = 2,
+                CXXConstructExprClass = 3,
+                CXXOperatorCallExpr = 4
             };
 
             public enum struct TemplateSpecializationKind
diff --git a/src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/AST.cs b/src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/AST.cs
index 430375ff..321b67c4 100644
--- a/src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/AST.cs
+++ b/src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/AST.cs
@@ -134,8 +134,10 @@ namespace CppSharp
             public enum StatementClass
             {
                 Any = 0,
-                DeclRefExprClass = 1,
-                CXXConstructExprClass = 2
+                BinaryOperator = 1,
+                DeclRefExprClass = 2,
+                CXXConstructExprClass = 3,
+                CXXOperatorCallExpr = 4
             }
 
             public enum TemplateSpecializationKind
diff --git a/src/CppParser/Bindings/CSharp/i686-pc-win32-msvc/AST.cs b/src/CppParser/Bindings/CSharp/i686-pc-win32-msvc/AST.cs
index 9575d83f..559495c1 100644
--- a/src/CppParser/Bindings/CSharp/i686-pc-win32-msvc/AST.cs
+++ b/src/CppParser/Bindings/CSharp/i686-pc-win32-msvc/AST.cs
@@ -134,8 +134,10 @@ namespace CppSharp
             public enum StatementClass
             {
                 Any = 0,
-                DeclRefExprClass = 1,
-                CXXConstructExprClass = 2
+                BinaryOperator = 1,
+                DeclRefExprClass = 2,
+                CXXConstructExprClass = 3,
+                CXXOperatorCallExpr = 4
             }
 
             public enum TemplateSpecializationKind
diff --git a/src/CppParser/Bindings/CSharp/x86_64-linux-gnu/AST.cs b/src/CppParser/Bindings/CSharp/x86_64-linux-gnu/AST.cs
index c307baa5..5afc3b93 100644
--- a/src/CppParser/Bindings/CSharp/x86_64-linux-gnu/AST.cs
+++ b/src/CppParser/Bindings/CSharp/x86_64-linux-gnu/AST.cs
@@ -134,8 +134,10 @@ namespace CppSharp
             public enum StatementClass
             {
                 Any = 0,
-                DeclRefExprClass = 1,
-                CXXConstructExprClass = 2
+                BinaryOperator = 1,
+                DeclRefExprClass = 2,
+                CXXConstructExprClass = 3,
+                CXXOperatorCallExpr = 4
             }
 
             public enum TemplateSpecializationKind
diff --git a/src/CppParser/Parser.cpp b/src/CppParser/Parser.cpp
index cde23958..eb323e23 100644
--- a/src/CppParser/Parser.cpp
+++ b/src/CppParser/Parser.cpp
@@ -2455,6 +2455,8 @@ AST::Expression* Parser::WalkStatement(clang::Stmt* Statement)
 
     switch (Statement->getStmtClass())
     {
+    case Stmt::BinaryOperatorClass:
+        return new AST::Expression(GetStringFromStatement(Statement), StatementClass::BinaryOperator);
     case Stmt::DeclRefExprClass:
         return new AST::Expression(GetStringFromStatement(Statement), StatementClass::DeclRefExprClass,
             WalkDeclaration(cast<DeclRefExpr>(Statement)->getDecl()));
@@ -2466,16 +2468,23 @@ AST::Expression* Parser::WalkStatement(clang::Stmt* Statement)
     case Stmt::CXXStaticCastExprClass:
     case Stmt::ImplicitCastExprClass:
         return WalkStatement(cast<CastExpr>(Statement)->getSubExprAsWritten());
+    case Stmt::CXXOperatorCallExprClass:
+        return new AST::Expression(GetStringFromStatement(Statement), StatementClass::CXXOperatorCallExpr,
+            WalkDeclaration(cast<CXXOperatorCallExpr>(Statement)->getCalleeDecl()));
     case Stmt::CXXConstructExprClass:
     case Stmt::CXXTemporaryObjectExprClass:
     {
         auto ConstructorExpr = cast<CXXConstructExpr>(Statement);
-        if (ConstructorExpr->getNumArgs() > 0)
+        if (ConstructorExpr->getNumArgs() == 1)
         {
             auto Arg = ConstructorExpr->getArg(0);
             auto TemporaryExpr = dyn_cast<MaterializeTemporaryExpr>(Arg);
-            if (TemporaryExpr && isa<CastExpr>(TemporaryExpr->GetTemporaryExpr()))
-                return WalkStatement(TemporaryExpr->GetTemporaryExpr());
+            if (TemporaryExpr)
+            {
+                auto Cast = dyn_cast<CastExpr>(TemporaryExpr->GetTemporaryExpr());
+                if (Cast && Cast->getSubExprAsWritten()->getStmtClass() != Stmt::IntegerLiteralClass)
+                    return WalkStatement(Cast->getSubExprAsWritten());
+            }
         }
         return new AST::Expression(GetStringFromStatement(Statement), StatementClass::CXXConstructExprClass,
             WalkDeclaration(ConstructorExpr->getConstructor()));
diff --git a/src/Generator/Passes/HandleDefaultParamValuesPass.cs b/src/Generator/Passes/HandleDefaultParamValuesPass.cs
index 47f30034..1d741c45 100644
--- a/src/Generator/Passes/HandleDefaultParamValuesPass.cs
+++ b/src/Generator/Passes/HandleDefaultParamValuesPass.cs
@@ -13,7 +13,7 @@ namespace CppSharp.Passes
 {
     public class HandleDefaultParamValuesPass : TranslationUnitPass
     {
-        private static readonly Regex regexFunctionParams = new Regex(@"\((.+)\)", RegexOptions.Compiled);
+        private static readonly Regex regexFunctionParams = new Regex(@"\(?(.+)\)?", RegexOptions.Compiled);
         private static readonly Regex regexDoubleColon = new Regex(@"\w+::", RegexOptions.Compiled);
         private static readonly Regex regexName = new Regex(@"(\w+)", RegexOptions.Compiled);
 
@@ -114,17 +114,18 @@ namespace CppSharp.Passes
             var enumItem = parameter.DefaultArgument.Declaration as Enumeration.Item;
             if (enumItem != null)
             {
-                parameter.DefaultArgument.String = string.Format("{0}{1}.{2}.{3}",
+                parameter.DefaultArgument.String = string.Format("{0}{1}{2}.{3}",
                     desugared.IsPrimitiveType() ? "(int) " : string.Empty,
-                    enumItem.Namespace.Namespace.Name, enumItem.Namespace.Name, enumItem.Name);
+                    string.IsNullOrEmpty(enumItem.Namespace.Namespace.Name)
+                        ? string.Empty
+                        : enumItem.Namespace.Namespace.Name + ".", enumItem.Namespace.Name, enumItem.Name);
                 return true;
             }
 
-            var call = parameter.DefaultArgument.Declaration as Method;
-            if (call != null && call.IsConstructor)
+            var call = parameter.DefaultArgument.Declaration as Function;
+            if (call != null || parameter.DefaultArgument.Class == StatementClass.BinaryOperator)
             {
-                string @params =
-                    regexFunctionParams.Match(parameter.DefaultArgument.String).Groups[1].Value;
+                string @params = regexFunctionParams.Match(parameter.DefaultArgument.String).Groups[1].Value;
                 if (@params.Contains("::"))
                     parameter.DefaultArgument.String = regexDoubleColon.Replace(@params, desugared + ".");
                 else
diff --git a/src/Generator/Passes/RenamePass.cs b/src/Generator/Passes/RenamePass.cs
index cc13910e..6cd3eae7 100644
--- a/src/Generator/Passes/RenamePass.cs
+++ b/src/Generator/Passes/RenamePass.cs
@@ -13,11 +13,11 @@ namespace CppSharp.Passes
     /// </summary>
     public abstract class RenamePass : TranslationUnitPass
     {
-        public class ParameterMappedTypeComparer : IEqualityComparer<Parameter>
+        public class ParameterComparer : IEqualityComparer<Parameter>
         {
             public bool Equals(Parameter x, Parameter y)
             {
-                return x.QualifiedType == y.QualifiedType;
+                return x.QualifiedType == y.QualifiedType && x.GenerationKind == y.GenerationKind;
             }
 
             public int GetHashCode(Parameter obj)
@@ -134,10 +134,10 @@ namespace CppSharp.Passes
             if (method != null)
             {
                 return ((Class) method.Namespace).Methods.Where(
-                    m => m.Parameters.SequenceEqual(function.Parameters, new ParameterMappedTypeComparer()));
+                    m => m.Parameters.SequenceEqual(function.Parameters, new ParameterComparer()));
             }
             return function.Namespace.Functions.Where(
-                f => f.Parameters.SequenceEqual(function.Parameters, new ParameterMappedTypeComparer()));
+                f => f.Parameters.SequenceEqual(function.Parameters, new ParameterComparer()));
         }
 
         public override bool VisitEnumItem(Enumeration.Item item)
diff --git a/tests/CSharpTemp/CSharpTemp.cpp b/tests/CSharpTemp/CSharpTemp.cpp
index ac9cbfc4..3f022a7c 100644
--- a/tests/CSharpTemp/CSharpTemp.cpp
+++ b/tests/CSharpTemp/CSharpTemp.cpp
@@ -222,35 +222,54 @@ TestCopyConstructorVal::TestCopyConstructorVal(const TestCopyConstructorVal& oth
     B = other.B;
 }
 
-void MethodsWithDefaultValues::DefaultPointer(Foo *ptr)
+Flags operator|(Flags lhs, Flags rhs)
 {
+    return static_cast<Flags>(static_cast<int>(lhs) | static_cast<int>(rhs));
 }
 
-void MethodsWithDefaultValues::DefaultValueType(ValueType bar)
+UntypedFlags operator|(UntypedFlags lhs, UntypedFlags rhs)
 {
+    return static_cast<UntypedFlags>(static_cast<int>(lhs) | static_cast<int>(rhs));
 }
 
-void MethodsWithDefaultValues::DefaultChar(char c)
+QGenericArgument::QGenericArgument(const char *name)
 {
+    _name = name;
 }
 
-void MethodsWithDefaultValues::DefaultRefTypeBeforeOthers(Foo foo, int i, Bar::Items item)
+void MethodsWithDefaultValues::defaultPointer(Foo *ptr)
 {
 }
 
-void MethodsWithDefaultValues::DefaultRefTypeAfterOthers(int i, Bar::Items item, Foo foo)
+void MethodsWithDefaultValues::defaultValueType(ValueType bar)
 {
 }
 
-void MethodsWithDefaultValues::DefaultRefTypeBeforeAndAfterOthers(int i, Foo foo, Bar::Items item, Baz baz)
+void MethodsWithDefaultValues::defaultChar(char c)
 {
 }
 
-void MethodsWithDefaultValues::DefaultIntAssignedAnEnum(int i)
+void MethodsWithDefaultValues::defaultRefTypeBeforeOthers(Foo foo, int i, Bar::Items item)
 {
 }
 
-void MethodsWithDefaultValues::DefaultRefAssignedValue(const Foo &fooRef)
+void MethodsWithDefaultValues::defaultRefTypeAfterOthers(int i, Bar::Items item, Foo foo)
+{
+}
+
+void MethodsWithDefaultValues::defaultRefTypeBeforeAndAfterOthers(int i, Foo foo, Bar::Items item, Baz baz)
+{
+}
+
+void MethodsWithDefaultValues::defaultIntAssignedAnEnum(int i)
+{
+}
+
+void MethodsWithDefaultValues::defaultRefAssignedValue(const Foo &fooRef)
+{
+}
+
+void MethodsWithDefaultValues::defaultMappedToEnum(QFlags<Flags> qFlags)
 {
 }
 
diff --git a/tests/CSharpTemp/CSharpTemp.cs b/tests/CSharpTemp/CSharpTemp.cs
index 4083e326..2efe4a09 100644
--- a/tests/CSharpTemp/CSharpTemp.cs
+++ b/tests/CSharpTemp/CSharpTemp.cs
@@ -81,6 +81,7 @@ namespace CppSharp.Tests
         public override void Preprocess(Driver driver, ASTContext ctx)
         {
             ctx.SetClassAsValueType("TestCopyConstructorVal");
+            ctx.SetClassAsValueType("QGenericArgument");
         }
 
         public override void Postprocess(Driver driver, ASTContext ctx)
diff --git a/tests/CSharpTemp/CSharpTemp.h b/tests/CSharpTemp/CSharpTemp.h
index 8fc93df2..7df4f644 100644
--- a/tests/CSharpTemp/CSharpTemp.h
+++ b/tests/CSharpTemp/CSharpTemp.h
@@ -187,17 +187,48 @@ struct DLL_API ValueType
 {
 };
 
+enum class Flags
+{
+    Flag1 = 1,
+    Flag2 = 2,
+    Flag3 = 4
+};
+
+DLL_API Flags operator|(Flags lhs, Flags rhs);
+
+enum UntypedFlags
+{
+    Flag1 = 1,
+    Flag2 = 2,
+    Flag3 = 4
+};
+
+UntypedFlags operator|(UntypedFlags lhs, UntypedFlags rhs);
+
+struct QGenericArgument
+{
+public:
+    QGenericArgument(const char* name = 0);
+private:
+    const char* _name;
+};
+
 class DLL_API MethodsWithDefaultValues
 {
 public:
-    void DefaultPointer(Foo* ptr = 0);
-    void DefaultValueType(ValueType bar = ValueType());
-    void DefaultChar(char c = 'a');
-    void DefaultRefTypeBeforeOthers(Foo foo = Foo(), int i = 5, Bar::Items item = Bar::Item2);
-    void DefaultRefTypeAfterOthers(int i = 5, Bar::Items item = Bar::Item2, Foo foo = Foo());
-    void DefaultRefTypeBeforeAndAfterOthers(int i = 5, Foo foo = Foo(), Bar::Items item = Bar::Item2, Baz baz = Baz());
-    void DefaultIntAssignedAnEnum(int i = Bar::Item1);
+    void defaultPointer(Foo* ptr = 0);
+    void defaultValueType(ValueType bar = ValueType());
+    void defaultChar(char c = 'a');
+    void defaultRefTypeBeforeOthers(Foo foo = Foo(), int i = 5, Bar::Items item = Bar::Item2);
+    void defaultRefTypeAfterOthers(int i = 5, Bar::Items item = Bar::Item2, Foo foo = Foo());
+    void defaultRefTypeBeforeAndAfterOthers(int i = 5, Foo foo = Foo(), Bar::Items item = Bar::Item2, Baz baz = Baz());
+    void defaultIntAssignedAnEnum(int i = Bar::Item1);
+    void defaultRefAssignedValue(const Foo& fooRef = Foo());
     void DefaultRefAssignedValue(const Foo& fooRef = Foo());
+    void defaultEnumAssignedBitwiseOr(Flags flags = Flags::Flag1 | Flags::Flag2);
+    void defaultEnumAssignedBitwiseOrShort(UntypedFlags flags = Flag1 | Flag2);
+    void defaultNonEmptyCtor(QGenericArgument arg = QGenericArgument(0));
+    void defaultMappedToEnum(QFlags<Flags> qFlags = Flags::Flag1);
 };
 
 class DLL_API HasPrivateOverrideBase