Fixed setters of indexers when the key is type-mapped.

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

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -925,7 +925,7 @@ namespace CppSharp.Generators.CSharp
             Type type;
             function.Type.IsPointerTo(out type);
             PrimitiveType primitiveType;
-            string internalFunction = GetFunctionNativeIdentifier(function);
+            var internalFunction = GetFunctionNativeIdentifier(function);
             if (type.IsPrimitiveType(out primitiveType))
             {
                 WriteLine("*Internal.{0}({1}, {2}) = value;", internalFunction,
@@ -937,9 +937,10 @@ namespace CppSharp.Generators.CSharp
                 Class @class;
                 var isValueType = (type.GetFinalPointee() ?? type).TryGetClass(out @class) &&
                     @class.IsValueType;
+                var paramMarshal = GenerateFunctionParamMarshal(function.Parameters[0], 0, function);
                 WriteLine("*({0}.Internal*) Internal.{1}({2}, {3}) = {4}value.{5};",
                     typeString, internalFunction, GetInstanceParam(function),
-                    function.Parameters[0].Name,
+                    paramMarshal.Context == null ? paramMarshal.Name : paramMarshal.Context.Return,
                     isValueType ? string.Empty : string.Format("*({0}.Internal*) ", typeString),
                     Helpers.InstanceIdentifier);
             }

tests/CSharp/CSharp.cs

@@ -27,7 +27,7 @@ namespace CppSharp.Tests
 
         public override string CSharpSignature(CSharpTypePrinterContext ctx)
         {
-            return this.CSharpSignatureType(ctx).ToString();
+            return CSharpSignatureType(ctx).ToString();
         }
 
         public override void CSharpMarshalToNative(MarshalContext ctx)
@@ -48,7 +48,7 @@ namespace CppSharp.Tests
         {
             get
             {
-                var type = (TemplateSpecializationType) this.Type;
+                var type = (TemplateSpecializationType) Type;
                 var pointeeType = type.Arguments[0].Type;
                 var checker = new TypeIgnoreChecker(TypeMapDatabase);
                 pointeeType.Visit(checker);

tests/Common/Common.Tests.cs

@@ -331,9 +331,10 @@ public class CommonTests : GeneratorTestFixture
     }
 
     [Test]
-    public unsafe void TestIndexers()
+    public void TestIndexers()
+    {
+        using (var indexedProperties = new TestIndexedProperties())
         {
-        var indexedProperties = new TestIndexedProperties();
             Assert.AreEqual(1, indexedProperties[0]);
             Assert.AreEqual(1, indexedProperties["foo"]);
             indexedProperties[0] = 2;
@@ -350,14 +351,20 @@ public class CommonTests : GeneratorTestFixture
             Assert.AreEqual(4, newProperties.Field);
             newProperties.Field = 5;
             Assert.AreEqual(5, indexedProperties[(byte) 0].Field);
+            var bar = new Bar { A = 5 };
+            indexedProperties[0u] = bar;
+            Assert.That(bar.A, Is.EqualTo(indexedProperties[0u].A));
+            indexedProperties[(ushort) 0] = bar;
+            Assert.That(bar.A, Is.EqualTo(indexedProperties[(ushort) 0].A));
+        }
     }
 
     [Test]
-    public unsafe void TestOperators()
+    public void TestOperators()
     {
         var @class = new ClassWithOverloadedOperators();
         Assert.AreEqual(1, (char) @class);
-        Assert.AreEqual(2, (int) @class);
+        Assert.AreEqual(2, @class);
         Assert.AreEqual(3, (short) @class);
     }
 

tests/Common/Common.cpp

@@ -421,6 +421,10 @@ std::string HasStdString::testStdString(std::string s)
     return s + "_test";
 }
 
+TypeMappedIndex::TypeMappedIndex()
+{
+}
+
 InternalCtorAmbiguity::InternalCtorAmbiguity(void* param)
 {
     // cause a crash to indicate this is the incorrect ctor to invoke

tests/Common/Common.cs

@@ -1,11 +1,48 @@
 using System.Linq;
 using CppSharp.AST;
 using CppSharp.Generators;
+using CppSharp.Generators.CLI;
+using CppSharp.Generators.CSharp;
 using CppSharp.Passes;
+using CppSharp.Types;
 using CppSharp.Utils;
 
 namespace CppSharp.Tests
 {
+    [TypeMap("TypeMappedIndex")]
+    public class TypeMappedIndex : TypeMap
+    {
+        public override string CLISignature(CLITypePrinterContext ctx)
+        {
+            return "unsigned short";
+        }
+
+        public override void CLIMarshalToManaged(MarshalContext ctx)
+        {
+            ctx.Return.Write(ctx.ReturnVarName);
+        }
+
+        public override void CLIMarshalToNative(MarshalContext ctx)
+        {
+            ctx.Return.Write("::TypeMappedIndex()");
+        }
+
+        public override string CSharpSignature(CSharpTypePrinterContext ctx)
+        {
+            return "ushort";
+        }
+
+        public override void CSharpMarshalToManaged(MarshalContext ctx)
+        {
+            ctx.Return.Write(ctx.ReturnVarName);
+        }
+
+        public override void CSharpMarshalToNative(MarshalContext ctx)
+        {
+            ctx.Return.Write("IntPtr.Zero");
+        }
+    }
+
     public class CommonTestsGenerator : GeneratorTest
     {
         public CommonTestsGenerator(GeneratorKind kind)

tests/Common/Common.h

@@ -525,6 +525,12 @@ TestProperties::TestProperties() : Field(0) {}
 int TestProperties::getFieldValue() { return Field; }
 void TestProperties::setFieldValue(int Value) { Field = Value; }
 
+class DLL_API TypeMappedIndex
+{
+public:
+    TypeMappedIndex();
+};
+
 class DLL_API TestIndexedProperties
 {
 public:
@@ -544,6 +550,7 @@ public:
     // Should lead to a read-only indexer with argument type TestProperties
     foo_t operator[](TestProperties b);
     Bar& operator[](unsigned long i);
+    Bar& operator[](const TypeMappedIndex& key);
 private:
     foo_t p;
     TestProperties f;
@@ -562,6 +569,10 @@ Bar& TestIndexedProperties::operator[](unsigned long i)
 {
     return bar;
 }
+Bar& TestIndexedProperties::operator[](const TypeMappedIndex& key)
+{
+    return bar;
+}
 
 struct DLL_API TestIndexedPropertiesInValueType
 {