From 5a21a7facd0866057aca7cef892dbb4398481cad Mon Sep 17 00:00:00 2001
From: Dimitar Dobrev <dpldobrev@protonmail.com>
Date: Sat, 30 Oct 2021 20:19:05 +0300
Subject: [PATCH] Generate valid C# for copy ctors with extra args

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>
---
 src/Generator/Generators/CSharp/CSharpSources.cs | 6 +++++-
 tests/Common/Common.cpp                          | 5 +++++
 tests/Common/Common.h                            | 1 +
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/Generator/Generators/CSharp/CSharpSources.cs b/src/Generator/Generators/CSharp/CSharpSources.cs
index 79ba9ccd..9c88a4e1 100644
--- a/src/Generator/Generators/CSharp/CSharpSources.cs
+++ b/src/Generator/Generators/CSharp/CSharpSources.cs
@@ -2501,7 +2501,11 @@ internal static{(@new ? " new" : string.Empty)} {printedClass} __GetInstance({Ty
                     // Allocate memory for a new native object and call the ctor.
                     WriteLine($"var ret = Marshal.AllocHGlobal(sizeof({@internal}));");
                     var printed = TypePrinter.PrintNative(@class);
-                    WriteLine($"{printed}.{GetFunctionNativeIdentifier(copyCtorMethod)}(ret, new {TypePrinter.IntPtrType}(&native));",
+                    string defaultValue = string.Empty;
+                    if (copyCtorMethod.Parameters.Count > 1)
+                        defaultValue = $", {ExpressionPrinter.VisitParameter(copyCtorMethod.Parameters.Last())}";
+                    WriteLine($@"{printed}.{GetFunctionNativeIdentifier(copyCtorMethod)}(ret, new {
+                        TypePrinter.IntPtrType}(&native){defaultValue});",
                         printed, GetFunctionNativeIdentifier(copyCtorMethod));
                     WriteLine("return ret.ToPointer();");
                 }
diff --git a/tests/Common/Common.cpp b/tests/Common/Common.cpp
index 48a72887..04d63cdd 100644
--- a/tests/Common/Common.cpp
+++ b/tests/Common/Common.cpp
@@ -465,6 +465,11 @@ ClassA::ClassA(int value)
     Value = value;
 }
 
+ClassA::ClassA(const ClassA& other, bool param)
+{
+    Value = other.Value;
+}
+
 ClassB::ClassB(const ClassA& x)
 {
     Value = x.Value;
diff --git a/tests/Common/Common.h b/tests/Common/Common.h
index 3f9c9c0c..1063b741 100644
--- a/tests/Common/Common.h
+++ b/tests/Common/Common.h
@@ -713,6 +713,7 @@ class DLL_API ClassA
 {
 public:
     ClassA(int value);
+    ClassA(const ClassA& other, bool param = true);
     int Value;
 };
 class DLL_API ClassB