Changed the generated C# for const references to primitives as just primitives.

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

src/AST/TypeExtensions.cs

@@ -346,7 +346,14 @@
             return left.Equals(right);
         }
 
-        public static bool IsConst(this QualifiedType type)
+        public static bool IsConstRefToPrimitive(this QualifiedType type)
+        {
+            Type desugared = type.Type.Desugar();
+            return desugared.IsReference() &&
+                desugared.GetFinalPointee().Desugar().IsPrimitiveType() && type.IsConst();
+        }
+
+        private static bool IsConst(this QualifiedType type)
         {
             return type.Type != null && (type.Qualifiers.IsConst ||
                 type.Type.GetQualifiedPointee().IsConst());

src/Generator/Generators/CSharp/CSharpMarshal.cs

@@ -186,7 +186,8 @@ namespace CppSharp.Generators.CSharp
                 if (Context.Function != null &&
                     Context.Function.OperatorKind == CXXOperatorKind.Subscript)
                 {
-                    if (type.IsPrimitiveType(primitive))
+                    if (type.IsPrimitiveType(primitive) ||
+                        new QualifiedType(pointer, quals).IsConstRefToPrimitive())
                     {
                         Context.Return.Write("*");
                     }
@@ -194,7 +195,7 @@ namespace CppSharp.Generators.CSharp
                     {
                         var templateParameter = type as TemplateParameterType;
                         if (templateParameter != null)
-                            Context.Return.Write($@"({templateParameter.Parameter.Name}) (object) *");
+                            Context.Return.Write($"({templateParameter.Parameter.Name}) (object) *");
                     }
                 }
 
@@ -557,6 +558,8 @@ namespace CppSharp.Generators.CSharp
             if (!VisitType(pointer, quals))
                 return false;
 
+            var qualifiedPointer = new QualifiedType(pointer, quals);
+
             var templateSubstitution = pointer.Pointee as TemplateParameterSubstitutionType;
             PointerType realPointer = null;
             if (templateSubstitution != null)
@@ -585,7 +588,8 @@ namespace CppSharp.Generators.CSharp
                 }
                 if (Context.Function.OperatorKind != CXXOperatorKind.Subscript)
                 {
-                    if (Context.Parameter.Kind == ParameterKind.PropertyValue)
+                    if (Context.Parameter.Kind == ParameterKind.PropertyValue ||
+                        qualifiedPointer.IsConstRefToPrimitive())
                     {
                         Context.Return.Write($"&{Context.Parameter.Name}");
                     }
@@ -685,9 +689,15 @@ namespace CppSharp.Generators.CSharp
                     if (marshalAsString && (Context.MarshalKind == MarshalKind.NativeField ||
                         Context.MarshalKind == MarshalKind.VTableReturnValue ||
                         Context.MarshalKind == MarshalKind.Variable))
+                    {
                         Context.Return.Write(MarshalStringToUnmanaged(Context.Parameter.Name));
+                    }
                     else
+                    {
+                        if (qualifiedPointer.IsConstRefToPrimitive())
+                            Context.Return.Write("&");
                         Context.Return.Write(Context.Parameter.Name);
+                    }
                 }
 
                 return true;

src/Generator/Generators/CSharp/CSharpTypePrinter.cs

@@ -206,6 +206,10 @@ namespace CppSharp.Generators.CSharp
 
             var pointee = pointer.Pointee.Desugar();
 
+            if (isManagedContext &&
+                new QualifiedType(pointer, quals).IsConstRefToPrimitive())
+                return pointee.Visit(this);
+
             // From http://msdn.microsoft.com/en-us/library/y31yhkeb.aspx
             // Any of the following types may be a pointer type:
             // * sbyte, byte, short, ushort, int, uint, long, ulong, char, float, double,

src/Generator/Passes/CheckDuplicatedNamesPass.cs

@@ -19,7 +19,7 @@ namespace CppSharp.Passes
         public bool UpdateName(Declaration decl)
         {
             var function = decl as Function;
-            if (function != null)
+            if (function != null && !(function.Namespace is ClassTemplateSpecialization))
             {
                 return UpdateName(function);
             }

src/Generator/Passes/MarshalPrimitivePointersAsRefTypePass.cs

@@ -15,7 +15,8 @@ namespace CppSharp.Passes
                 return false;
 
             foreach (var param in function.Parameters.Where(
-                p => !p.IsOut && p.Type.Desugar().IsPrimitiveTypeConvertibleToRef()))
+                p => !p.IsOut && !p.QualifiedType.IsConstRefToPrimitive() &&
+                    p.Type.Desugar().IsPrimitiveTypeConvertibleToRef()))
                 param.Usage = ParameterUsage.InOut;
 
             return true;

tests/CSharp/CSharp.Tests.cs

@@ -681,8 +681,7 @@ public unsafe class CSharpTests : GeneratorTestFixture
     [Test]
     public void TestTemplateWithPointerToTypeParameter()
     {
-        int staticT = 5;
-        Assert.That(IndependentFieldsExtensions.StaticDependent(ref staticT), Is.EqualTo(5));
+        Assert.That(IndependentFieldsExtensions.StaticDependent(5), Is.EqualTo(5));
     }
 
     [Test]
@@ -702,14 +701,12 @@ public unsafe class CSharpTests : GeneratorTestFixture
     {
         using (var independentFields = new IndependentFields<int>())
         {
-            var t = 5;
-            Assert.That(independentFields.GetDependent(ref t), Is.EqualTo(5));
+            Assert.That(independentFields.GetDependent(5), Is.EqualTo(5));
             Assert.That(independentFields.Independent, Is.EqualTo(1));
         }
         using (var independentFields = new IndependentFields<bool>())
         {
-            var t = true;
-            Assert.That(independentFields.GetDependent(ref t), Is.EqualTo(true));
+            Assert.That(independentFields.GetDependent(true), Is.EqualTo(true));
             Assert.That(independentFields.Independent, Is.EqualTo(1));
         }
     }
@@ -1113,8 +1110,7 @@ public unsafe class CSharpTests : GeneratorTestFixture
     {
         using (var indexproperty = new TestIndexedProperties())
         {
-            int a = 2;
-            Assert.That(indexproperty[&a], Is.EqualTo(2));
+            Assert.That(indexproperty[2], Is.EqualTo(2));
         }
     }