Merge pull request #345 from ddobrev/master

Fixes for default arguments

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -2072,6 +2072,16 @@ namespace CppSharp.Generators.CSharp
 
             Write(")");
 
+            if (method.SynthKind == FunctionSynthKind.DefaultValueOverload && method.IsConstructor &&
+                !(Driver.Options.GenerateAbstractImpls && method.IsPure))
+            {
+                Write(" : this({0})",
+                    string.Join(", ",
+                        method.Parameters.Where(
+                            p => p.Kind == ParameterKind.Regular).Select(
+                                p => p.GenerationKind == GenerationKind.None ? p.DefaultArgument.String : p.Name)));
+            }
+
             if (Driver.Options.GenerateAbstractImpls && method.IsPure)
             {
                 Write(";");
@@ -2090,14 +2100,17 @@ namespace CppSharp.Generators.CSharp
 
             if (method.SynthKind == FunctionSynthKind.DefaultValueOverload)
             {
-                Type type = method.OriginalReturnType.Type;
-                WriteLine("{0}{1}({2});",
-                    type.IsPrimitiveType(PrimitiveType.Void) ? string.Empty : "return ",
-                    method.Name,
-                    string.Join(", ",
-                        method.Parameters.Where(
-                        p => p.Kind == ParameterKind.Regular).Select(
-                            p => p.GenerationKind == GenerationKind.None ? p.DefaultArgument.String : p.Name)));
+                if (!method.IsConstructor)
+                {
+                    Type type = method.OriginalReturnType.Type;
+                    this.WriteLine("{0}{1}({2});",
+                        type.IsPrimitiveType(PrimitiveType.Void) ? string.Empty : "return ",
+                        method.Name,
+                        string.Join(", ",
+                            method.Parameters.Where(
+                                p => p.Kind == ParameterKind.Regular).Select(
+                                    p => p.GenerationKind == GenerationKind.None ? p.DefaultArgument.String : p.Name)));
+                }
                 goto SkipImpl;
             }
 

src/Generator/Passes/HandleDefaultParamValuesPass.cs

@@ -44,6 +44,8 @@ namespace CppSharp.Passes
                     continue;
 
                 CheckForULongValue(parameter, desugared);
+
+                CheckForDefaultEmptyChar(parameter, desugared);
             }
 
             GenerateOverloads(function, overloadIndices);
@@ -146,6 +148,15 @@ namespace CppSharp.Passes
                 parameter.DefaultArgument.String = value.ToString(CultureInfo.InvariantCulture);
         }
 
+        private void CheckForDefaultEmptyChar(Parameter parameter, Type desugared)
+        {
+            if (parameter.DefaultArgument.String == "0" && Driver.Options.MarshalCharAsManagedChar &&
+                desugared.IsPrimitiveType(PrimitiveType.Char))
+            {
+                parameter.DefaultArgument.String = "'\\0'";
+            }
+        }
+
         private static void GenerateOverloads(Function function, List<int> overloadIndices)
         {
             foreach (var overloadIndex in overloadIndices)

tests/CSharpTemp/CSharpTemp.Tests.cs

@@ -131,6 +131,7 @@ public class CSharpTempTests : GeneratorTestFixture
     {
         var methodsWithDefaultValues = new MethodsWithDefaultValues();
         methodsWithDefaultValues.DefaultChar();
+        methodsWithDefaultValues.DefaultEmptyChar();
         methodsWithDefaultValues.DefaultPointer();
         methodsWithDefaultValues.DefaultRefTypeAfterOthers();
         methodsWithDefaultValues.DefaultRefTypeBeforeAndAfterOthers(5, new Foo());

tests/CSharpTemp/CSharpTemp.cpp

@@ -237,6 +237,10 @@ QGenericArgument::QGenericArgument(const char *name)
     _name = name;
 }
 
+MethodsWithDefaultValues::MethodsWithDefaultValues(Foo foo)
+{
+}
+
 void MethodsWithDefaultValues::defaultPointer(Foo *ptr)
 {
 }
@@ -249,6 +253,10 @@ void MethodsWithDefaultValues::defaultChar(char c)
 {
 }
 
+void MethodsWithDefaultValues::defaultEmptyChar(char c)
+{
+}
+
 void MethodsWithDefaultValues::defaultRefTypeBeforeOthers(Foo foo, int i, Bar::Items item)
 {
 }

tests/CSharpTemp/CSharpTemp.h

@@ -216,9 +216,11 @@ private:
 class DLL_API MethodsWithDefaultValues
 {
 public:
+    MethodsWithDefaultValues(Foo foo = Foo());
     void defaultPointer(Foo* ptr = 0);
     void defaultValueType(ValueType bar = ValueType());
     void defaultChar(char c = 'a');
+    void defaultEmptyChar(char c = 0);
     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());