diff --git a/src/CppAst.Tests/TestMisc.cs b/src/CppAst.Tests/TestMisc.cs
index 08fe826..fb7131d 100644
--- a/src/CppAst.Tests/TestMisc.cs
+++ b/src/CppAst.Tests/TestMisc.cs
@@ -23,17 +23,30 @@ class Bar : public Foo
 public:
   using Foo::Foo;
 };
+
+class Baz : public Bar
+{
+public:
+  using Bar::Bar;
+  Baz(double y) : y_{y} {}
+private:
+  double y_{0};
+};
 ",
                 compilation =>
                 {
                     Assert.False(compilation.HasErrors);
-                    Assert.AreEqual(2, compilation.Classes.Count);
+                    Assert.AreEqual(3, compilation.Classes.Count);
                     Assert.AreEqual(1, compilation.Classes[0].Constructors.Count);
-                    // Bar will get 3 constructors
-                    Assert.AreEqual(3, compilation.Classes[1].Constructors.Count);
+                    Assert.AreEqual(2, compilation.Classes[1].Constructors.Count);
                     Assert.AreEqual(CppVisibility.Public, compilation.Classes[1].Constructors[0].Visibility);
                     Assert.AreEqual(CppVisibility.Public, compilation.Classes[1].Constructors[1].Visibility);
-                    Assert.AreEqual(CppVisibility.Public, compilation.Classes[1].Constructors[2].Visibility);
+
+                    Assert.AreEqual(3, compilation.Classes[2].Constructors.Count);
+                    Assert.AreEqual(CppVisibility.Public, compilation.Classes[2].Constructors[0].Visibility);
+                    Assert.AreEqual(CppVisibility.Public, compilation.Classes[2].Constructors[1].Visibility);
+                    Assert.AreEqual(CppVisibility.Public, compilation.Classes[2].Constructors[2].Visibility);
+
                 }
             );
         }
diff --git a/src/CppAst/CppFunction.cs b/src/CppAst/CppFunction.cs
index ca94a83..694e7e6 100644
--- a/src/CppAst/CppFunction.cs
+++ b/src/CppAst/CppFunction.cs
@@ -4,6 +4,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Text;
 
 namespace CppAst
@@ -86,6 +87,69 @@ public int DefaultParamCount
             }
         }
 
+        /// <summary>
+        /// Checks whether the two functions are the same or not
+        /// </summary>
+        public bool Equals(CppFunction other)
+        {
+            return Visibility.Equals(other.Visibility) &&
+              Attributes.SequenceEqual(other.Attributes) &&
+              TokenAttributes.SequenceEqual(other.TokenAttributes) &&
+              StorageQualifier.Equals(other.StorageQualifier) &&
+              LinkageKind.Equals(other.LinkageKind) &&
+              IsConstructor.Equals(other.IsConstructor) &&
+              Name.Equals(other.Name) &&
+              Parameters.SequenceEqual(other.Parameters) &&
+              TemplateParameters.SequenceEqual(other.TemplateParameters) &&
+              CallingConvention.Equals(other.CallingConvention) &&
+              Visibility.Equals(other.Visibility) &&
+              Flags.Equals(other.Flags) &&
+              ReturnType.Equals(other.ReturnType);
+        }
+
+        public override bool Equals(object obj)
+        {
+            return ReferenceEquals(this, obj) || obj is CppFunction other && Equals(other);
+        }
+
+        /// <inheritdoc />
+        public override int GetHashCode()
+        {
+            unchecked
+            {
+                int hashCode = base.GetHashCode();
+                hashCode = (hashCode * 397) ^ Visibility.GetHashCode();
+                hashCode = (hashCode * 397) ^ StorageQualifier.GetHashCode();
+                hashCode = (hashCode * 397) ^ LinkageKind.GetHashCode();
+                hashCode = (hashCode * 397) ^ IsConstructor.GetHashCode();
+                hashCode = (hashCode * 397) ^ Name.GetHashCode();
+                hashCode = (hashCode * 397) ^ CallingConvention.GetHashCode();
+                hashCode = (hashCode * 397) ^ Visibility.GetHashCode();
+                hashCode = (hashCode * 397) ^ Flags.GetHashCode();
+                hashCode = (hashCode * 397) ^ ReturnType.GetHashCode();
+
+                foreach (var templateParameter in TemplateParameters)
+                {
+                    hashCode = (hashCode * 397) ^ templateParameter.GetHashCode();
+                }
+                foreach (var parameter in Parameters)
+                {
+                    hashCode = (hashCode * 397) ^ parameter.GetHashCode();
+                }
+                foreach (var attribute in Attributes)
+                {
+                    hashCode = (hashCode * 397) ^ attribute.GetHashCode();
+                }
+                foreach (var attribute in TokenAttributes)
+                {
+                    hashCode = (hashCode * 397) ^ attribute.GetHashCode();
+                }
+
+                return hashCode;
+            }
+        }
+
+
         /// <summary>
         /// Gets or sets the flags of this function.
         /// </summary>
diff --git a/src/CppAst/CppModelBuilder.cs b/src/CppAst/CppModelBuilder.cs
index f20c044..e599ebd 100644
--- a/src/CppAst/CppModelBuilder.cs
+++ b/src/CppAst/CppModelBuilder.cs
@@ -1260,7 +1260,7 @@ private static CppStorageQualifier GetStorageQualifier(CXCursor cursor)
             return CppStorageQualifier.None;
         }
 
-private CppFunction VisitFunctionDecl(CXCursor destinationCursor, CXCursor cursor, CXCursor parent, void* data)
+        private CppFunction VisitFunctionDecl(CXCursor destinationCursor, CXCursor cursor, CXCursor parent, void* data)
         {
             var destinationContextContainer = GetOrCreateDeclarationContainer(destinationCursor.SemanticParent, data);
             var destinationContainer = destinationContextContainer.DeclarationContainer;
@@ -1294,13 +1294,7 @@ private CppFunction VisitFunctionDecl(CXCursor destinationCursor, CXCursor curso
 
             if (cursor.Kind == CXCursorKind.CXCursor_Constructor)
             {
-                var cppClass = (CppClass)destinationContainer;
                 cppFunction.IsConstructor = true;
-                cppClass.Constructors.Add(cppFunction);
-            }
-            else
-            {
-                destinationContainer.Functions.Add(cppFunction);
             }
 
             if (cursor.kind == CXCursorKind.CXCursor_FunctionTemplate)
@@ -1401,6 +1395,19 @@ private CppFunction VisitFunctionDecl(CXCursor destinationCursor, CXCursor curso
 
             }, new CXClientData((IntPtr)data));
 
+            if (cursor.Kind == CXCursorKind.CXCursor_Constructor)
+            {
+                var cppClass = (CppClass)destinationContainer;
+                if (!cppClass.Constructors.Contains(cppFunction))
+                {
+                    cppClass.Constructors.Add(cppFunction);
+                }
+            }
+            else if (!destinationContainer.Functions.Contains(cppFunction))
+            {
+                destinationContainer.Functions.Add(cppFunction);
+            }
+
             return cppFunction;
         }