Fixed the generated code when a default parameter of type char or wide char is assigned an int.

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

src/Generator/Passes/HandleDefaultParamValuesPass.cs

@@ -84,7 +84,7 @@ namespace CppSharp.Passes
             return CheckFloatSyntax(desugared, expression, ref result) ||
                 CheckForBinaryOperator(desugared, expression, ref result) ||
                 CheckForEnumValue(desugared, expression, ref result) ||
-                CheckForDefaultEmptyChar(desugared, expression, ref result);
+                CheckForDefaultChar(desugared, ref result);
         }
 
         private bool CheckForDefaultPointer(Type desugared, ref string result)
@@ -306,14 +306,15 @@ namespace CppSharp.Passes
                 ((BuiltinTypeExpression) defaultArgument).Value == 0;
         }
 
-        private bool CheckForDefaultEmptyChar(Type desugared, Statement statement,
+        private bool CheckForDefaultChar(Type desugared, ref string result)
-            ref string result)
         {
-            if (statement.String == "0" &&
+            int value;
-                Driver.Options.MarshalCharAsManagedChar &&
+            if (int.TryParse(result, out value) &&
-                desugared.IsPrimitiveType(PrimitiveType.Char))
+                ((Driver.Options.MarshalCharAsManagedChar &&
+                 desugared.IsPrimitiveType(PrimitiveType.Char)) ||
+                 desugared.IsPrimitiveType(PrimitiveType.WideChar)))
             {
-                result = "'\\0'";
+                result = value == 0 ? "'\\0'" : ("(char) " + result);
                 return true;
             }
 

tests/CSharp/CSharp.Tests.cs

@@ -213,6 +213,8 @@ public unsafe class CSharpTests : GeneratorTestFixture
             methodsWithDefaultValues.DefaultWithGetPropertyCall();
             methodsWithDefaultValues.DefaultWithIndirectStringConstant();
             methodsWithDefaultValues.DefaultWithDirectIntConstant();
+            methodsWithDefaultValues.DefaultWithEnumInLowerCasedNameSpace();
+            methodsWithDefaultValues.DefaultWithCharFromInt();
         }
     }
 

tests/CSharp/CSharp.cpp

@@ -583,6 +583,10 @@ void MethodsWithDefaultValues::defaultWithEnumInLowerCasedNameSpace(lowerCaseNam
 {
 }
 
+void MethodsWithDefaultValues::defaultWithCharFromInt(char c)
+{
+}
+
 int MethodsWithDefaultValues::getA()
 {
     return m_foo.A;

tests/CSharp/CSharp.h

@@ -411,6 +411,7 @@ public:
     void defaultWithIndirectStringConstant(const Foo& arg = Foo(stringConstant));
     void defaultWithDirectIntConstant(int arg = intConstant);
     void defaultWithEnumInLowerCasedNameSpace(lowerCaseNameSpace::Enum e = lowerCaseNameSpace::Enum::Item2);
+    void defaultWithCharFromInt(char c = 32);
     int getA();
 private:
     Foo m_foo;