Added support for read-only [] operators.

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

src/AST/Property.cs

@@ -1,3 +1,5 @@
+using System.Collections.Generic;
+
 namespace CppSharp.AST
 {
     /// <summary>
@@ -36,6 +38,16 @@ namespace CppSharp.AST
         // The field that should be get and set by this property
         public Field Field { get; set; }
 
+        private readonly List<Parameter> parameters = new List<Parameter>();
+        
+        /// <summary>
+        /// Only applicable to index ([]) properties.
+        /// </summary>
+        public List<Parameter> Parameters
+        {
+            get { return parameters; }
+        }
+
         public override T Visit<T>(IDeclVisitor<T> visitor)
         {
             return visitor.VisitProperty(this);

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -893,14 +893,12 @@ namespace CppSharp.Generators.CSharp
 
         private void GenerateClassProperties(Class @class)
         {
-            foreach (var prop in @class.Properties)
+            foreach (var prop in @class.Properties.Where(p => !p.Ignore))
             {
-                if (prop.Ignore) continue;
-
                 PushBlock(CSharpBlockKind.Property);
                 WriteLine("{0} {1} {2}",
                     prop.Access == AccessSpecifier.Public ? "public" : "protected",
-                    prop.Type, SafeIdentifier(prop.Name));
+                    prop.Type, GetPropertyName(prop));
                 WriteStartBraceIndent();
 
                 if (prop.Field != null)
@@ -925,6 +923,12 @@ namespace CppSharp.Generators.CSharp
             }
         }
 
+        private string GetPropertyName(Property prop)
+        {
+            return prop.Parameters.Count == 0 ? SafeIdentifier(prop.Name)
+                : string.Format("this[{0}]", FormatMethodParameters(prop.Parameters));
+        }
+
         private void GenerateVariable(Class @class, Type type, Variable variable)
         {
             PushBlock(CSharpBlockKind.Variable);
@@ -1469,7 +1473,7 @@ namespace CppSharp.Generators.CSharp
 
             var functionName = GetFunctionIdentifier(function);
             Write("public static {0} {1}(", function.OriginalReturnType, functionName);
-            GenerateMethodParameters(function);
+            Write(FormatMethodParameters(function.Parameters));
             WriteLine(")");
             WriteStartBraceIndent();
 
@@ -1517,7 +1521,7 @@ namespace CppSharp.Generators.CSharp
             else
                 Write("{0} {1}(", method.OriginalReturnType, functionName);
 
-            GenerateMethodParameters(method);
+            Write(FormatMethodParameters(method.Parameters));
 
             Write(")");
 
@@ -1938,25 +1942,16 @@ namespace CppSharp.Generators.CSharp
             }
         }
 
-        private void GenerateMethodParameters(Function function)
-        {
-            var @params = new List<string>();
-
-            for (var i = 0; i < function.Parameters.Count; ++i)
+        private string FormatMethodParameters(IEnumerable<Parameter> @params)
         {
-                var param = function.Parameters[i];
-
-                if (param.Kind == ParameterKind.IndirectReturnType)
-                    continue;
-
-                var typeName = param.CSharpType(TypePrinter);
-                @params.Add(string.Format("{0}{1} {2}", GetParameterUsage(param.Usage),
+            return string.Join(", ",
+                from param in @params
+                where param.Kind != ParameterKind.IndirectReturnType
+                let typeName = param.CSharpType(this.TypePrinter)
+                select string.Format("{0}{1} {2}", GetParameterUsage(param.Usage),
                     typeName, SafeIdentifier(param.Name)));
         }
 
-            Write(string.Join(", ", @params));
-        }
-
         #endregion
 
         public bool GenerateTypedef(TypedefDecl typedef)

src/Generator/Passes/CheckOperatorsOverloads.cs

@@ -57,6 +57,12 @@ namespace CppSharp.Passes
                 if (@operator.SynthKind == FunctionSynthKind.NonMemberOperator)
                     continue;
 
+                if (@operator.OperatorKind == CXXOperatorKind.Subscript)
+                {
+                    CreateIndexer(@class, @operator);
+                }
+                else
+                {
                     // Handle missing operator parameters
                     if (@operator.IsStatic)
                         @operator.Parameters = @operator.Parameters.Skip(1).ToList();
@@ -75,6 +81,26 @@ namespace CppSharp.Passes
                     });
                 }
             }
+        }
+
+        private static void CreateIndexer(Class @class, Method @operator)
+        {
+            if (@class.Properties.All(p => p.Parameters.Count == 0 || 
+                p.Parameters[0].QualifiedType != @operator.Parameters[0].QualifiedType))
+            {
+                Property property = new Property
+                    {
+                        Name = "Item",
+                        QualifiedType = @operator.ReturnType,
+                        Access = @operator.Access,
+                        Namespace = @class
+                    };
+                property.GetMethod = @operator;
+                property.Parameters.AddRange(@operator.Parameters);
+                @class.Properties.Add(property);
+                @operator.IsGenerated = false;
+            }
+        }
 
         static void HandleMissingOperatorOverloadPair(Class @class, CXXOperatorKind op1,
             CXXOperatorKind op2)
@@ -153,6 +179,9 @@ namespace CppSharp.Passes
                 case CXXOperatorKind.Pipe:
                 case CXXOperatorKind.Caret:
 
+                // The array indexing operator can be overloaded
+                case CXXOperatorKind.Subscript:
+
                 // The comparison operators can be overloaded
                 case CXXOperatorKind.EqualEqual:
                 case CXXOperatorKind.ExclaimEqual:
@@ -180,9 +209,6 @@ namespace CppSharp.Passes
                 case CXXOperatorKind.LessLessEqual:
                 case CXXOperatorKind.GreaterGreaterEqual:
 
-                // The array indexing operator cannot be overloaded
-                case CXXOperatorKind.Subscript:
-
                 // The conditional logical operators cannot be overloaded
                 case CXXOperatorKind.AmpAmp:
                 case CXXOperatorKind.PipePipe: