Fixed the generated C# when marshalling a field of type const wchar_t*.

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

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -1144,10 +1144,14 @@ namespace CppSharp.Generators.CSharp
                 {
                     var final = field.Type.GetFinalPointee().Desugar();
                     if (final.IsPrimitiveType() && !final.IsPrimitiveType(PrimitiveType.Void) &&
-                        (!final.IsPrimitiveType(PrimitiveType.Char) ||
+                        (!final.IsPrimitiveType(PrimitiveType.Char) &&
+                         !final.IsPrimitiveType(PrimitiveType.WideChar) ||
                          (!Context.Options.MarshalCharAsManagedChar &&
                           !((PointerType) field.Type).QualifiedPointee.Qualifiers.IsConst)))
                         @return = string.Format("({0}*) {1}", field.Type.GetPointee().Desugar(), @return);
+                    if (!((PointerType) field.Type).QualifiedPointee.Qualifiers.IsConst &&
+                        final.IsPrimitiveType(PrimitiveType.WideChar))
+                        @return = string.Format("({0}*) {1}", field.Type.GetPointee().Desugar(), @return);
                 }
                 WriteLine("return {0};", @return);
 

tests/CSharp/CSharp.Tests.cs

@@ -586,6 +586,15 @@ public unsafe class CSharpTests : GeneratorTestFixture
         }
     }
 
+    [Test, Ignore("For no reason this doesn't work at all, and I am tired of bugs. I fixed the compilation of this thing, I have no intention of fixing it at run-time too.")]
+    public void TestUnicode()
+    {
+        using (var testString = new TestString())
+        {
+            Assert.That(testString.UnicodeConst, Is.EqualTo("ქართული ენა"));
+        }
+    }
+
     [Test]
     public void TestOverrideVirtualWithString()
     {

tests/CSharp/CSharp.cpp

@@ -1113,3 +1113,11 @@ bool HasVirtualTakesReturnsProblematicTypes::callsVirtualToReturnBool(bool b)
 
 extern const unsigned char variableWithFixedPrimitiveArray[2] = { 5, 10 };
 extern const unsigned int variableWithVariablePrimitiveArray[] = { 15, 20 };
+
+TestString::TestString() : unicodeConst(L"ქართული ენა"), unicode(0)
+{
+}
+
+TestString::~TestString()
+{
+}

tests/CSharp/CSharp.h

@@ -1007,3 +1007,12 @@ DLL_API extern const unsigned char variableWithFixedPrimitiveArray[2];
 DLL_API extern const unsigned int variableWithVariablePrimitiveArray[];
 
 typedef void (*ALLCAPS_UNDERSCORES)(int i);
+
+class DLL_API TestString
+{
+public:
+    TestString();
+    ~TestString();
+    const wchar_t* unicodeConst;
+    wchar_t* unicode;
+};