protected override void compileOperator(Context ctx)
 {
     var gen = ctx.CurrentILGenerator;
     GetExpressionType(ctx);
     loadAndConvertNumerics(ctx);
     gen.EmitRemainder();
 }

        public override void ProcessClosures(Context ctx)
        {
            if (MustInferArgTypes)
            {
                var name = Arguments.First(a => a.Type == typeof (UnspecifiedType)).Name;
                error(CompilerMessages.LambdaArgTypeUnknown, name);
            }

            // get evaluated return type
            var retType = _InferredReturnType ?? Body.Resolve(ctx);
            if (retType == typeof(NullType))
                error(CompilerMessages.LambdaReturnTypeUnknown);
            if (retType.IsVoid())
                retType = typeof (void);

            _Method = ctx.Scope.CreateClosureMethod(ctx, Arguments, retType);
            _Method.Body = Body;

            var outerMethod = ctx.CurrentMethod;
            ctx.CurrentMethod = _Method;

            _Method.Body.ProcessClosures(ctx);

            ctx.CurrentMethod = outerMethod;
        }

        protected override void compile(Context ctx, bool mustReturn)
        {
            var gen = ctx.CurrentILGenerator;

            var id = ArgumentId + (ctx.CurrentMethod.IsStatic ? 0 : 1);
            gen.EmitLoadArgument(id);
        }

        /// <summary>
        /// Generates the IL for this node.
        /// </summary>
        /// <param name="ctx">Pointer to current context.</param>
        /// <param name="mustReturn">Flag indicating the node should return a value.</param>
        public void Emit(Context ctx, bool mustReturn)
        {
            if (IsConstant && !mustReturn)
                return;

            emitCode(ctx, mustReturn);
        }

        protected override NodeBase expand(Context ctx, bool mustReturn)
        {
            if (RightOperand.IsConstant && RightOperand.ConstantValue == 1)
                return LeftOperand;

            return base.expand(ctx, mustReturn);
        }

        protected override void emitCode(Context ctx, bool mustReturn)
        {
            var gen = ctx.CurrentMethod.Generator;
            var loopType = Resolve(ctx);
            var saveLast = mustReturn && !loopType.IsVoid();

            var beginLabel = gen.DefineLabel();
            var endLabel = gen.DefineLabel();

            Local tmpVar = null;
            if (saveLast)
            {
                tmpVar = ctx.Scope.DeclareImplicit(ctx, loopType, false);
                Expr.Set(tmpVar, Expr.Default(loopType)).Emit(ctx, false);
            }

            gen.MarkLabel(beginLabel);

            Expr.Cast(Condition, typeof(bool)).Emit(ctx, true);
            gen.EmitConstant(false);
            gen.EmitBranchEquals(endLabel);

            Body.Emit(ctx, mustReturn);

            if (saveLast)
                gen.EmitSaveLocal(tmpVar.LocalBuilder);

            gen.EmitJump(beginLabel);

            gen.MarkLabel(endLabel);
            if (saveLast)
                gen.EmitLoadLocal(tmpVar.LocalBuilder);
        }

 protected override void emitCode(Context ctx, bool mustReturn)
 {
     if (_Getter == null)
         compileArray(ctx);
     else
         compileCustom(ctx);
 }

        protected override void compile(Context ctx, bool mustReturn)
        {
            GetExpressionType(ctx);

            var gen = ctx.CurrentILGenerator;
            gen.EmitLoadArgument(0);
        }

        public override void ProcessClosures(Context ctx)
        {
            if(Expression is GetIdentifierNode || Expression is GetMemberNode)
                Expression.ProcessClosures(ctx);

            base.ProcessClosures(ctx);
        }

        private void compileCustom(Context ctx)
        {
            var gen = ctx.CurrentILGenerator;

            var exprType = Expression.GetExpressionType(ctx);
            var idxType = Index.GetExpressionType(ctx);

            try
            {
                var pty = ctx.ResolveIndexer(exprType, idxType, false);
                var idxDest = pty.ArgumentTypes[0];
                var valDest = pty.ArgumentTypes[1];

                Expression.Compile(ctx, true);

                Expr.Cast(Index, idxDest).Compile(ctx, true);
                Expr.Cast(Value, valDest).Compile(ctx, true);

                gen.EmitCall(pty.MethodInfo);
            }
            catch (LensCompilerException ex)
            {
                ex.BindToLocation(this);
                throw;
            }
        }

        protected override void compile(Context ctx, bool mustReturn)
        {
            resolve(ctx);

            var gen = ctx.CurrentILGenerator;

            var destType = m_Field != null ? m_Field.FieldType : m_Property.PropertyType;
            var valType = Value.GetExpressionType(ctx);

            ctx.CheckTypedExpression(Value, valType, true);

            if(!destType.IsExtendablyAssignableFrom(valType))
                Error(CompilerMessages.ImplicitCastImpossible, valType, destType);

            if (!m_IsStatic)
            {
                var exprType = Expression.GetExpressionType(ctx);
                if (Expression is IPointerProvider && exprType.IsStruct())
                    (Expression as IPointerProvider).PointerRequired = true;

                Expression.Compile(ctx, true);
            }

            Expr.Cast(Value, destType).Compile(ctx, true);

            if(m_Field != null)
                gen.EmitSaveField(m_Field.FieldInfo);
            else
                gen.EmitCall(m_Property.Setter, true);
        }

        /// <summary>
        /// Emits the node ready for accessing members or invoking methods on it.
        /// </summary>
        public static void EmitNodeForAccess(this NodeBase node, Context ctx)
        {
            var type = node.Resolve(ctx);

            if (type.IsValueType)
            {
                if (node is IPointerProvider)
                {
                    (node as IPointerProvider).PointerRequired = true;
                    node.Emit(ctx, true);
                }
                else
                {
                    var gen = ctx.CurrentMethod.Generator;

                    var tmpVar = ctx.Scope.DeclareImplicit(ctx, type, true);
                    gen.EmitLoadLocal(tmpVar.LocalBuilder, true);

                    node.Emit(ctx, true);
                    gen.EmitSaveObject(type);

                    gen.EmitLoadLocal(tmpVar.LocalBuilder, true);
                }
            }
            else
            {
                node.Emit(ctx, true);
            }
        }

        protected override Type resolve(Context ctx, bool mustReturn)
        {
            var exprType = Expression.Resolve(ctx);
            var idxType = Index.Resolve(ctx);

            if (!exprType.IsArray)
            {
                try
                {
                    _Indexer = ReflectionHelper.ResolveIndexer(exprType, idxType, false);
                }
                catch (LensCompilerException ex)
                {
                    ex.BindToLocation(this);
                    throw;
                }
            }

            var idxDestType = exprType.IsArray ? typeof (int) : _Indexer.ArgumentTypes[0];
            var valDestType = exprType.IsArray ? exprType.GetElementType() : _Indexer.ArgumentTypes[1];

            if(!idxDestType.IsExtendablyAssignableFrom(idxType))
                error(Index, CompilerMessages.ImplicitCastImpossible, idxType, idxDestType);

            ensureLambdaInferred(ctx, Value, valDestType);
            var valType = Value.Resolve(ctx);
            if (!valDestType.IsExtendablyAssignableFrom(valType))
                error(Value, CompilerMessages.ImplicitCastImpossible, valType, valDestType);

            return base.resolve(ctx, mustReturn);
        }

        protected override void emitCode(Context ctx, bool mustReturn)
        {
            var gen = ctx.CurrentMethod.Generator;

            var backup = ctx.CurrentTryBlock;
            ctx.CurrentTryBlock = this;

            EndLabel = gen.BeginExceptionBlock();

            Code.Emit(ctx, false);
            gen.EmitLeave(EndLabel);

            foreach (var curr in CatchClauses)
                curr.Emit(ctx, false);

            if (Finally != null)
            {
                gen.BeginFinallyBlock();
                Finally.Emit(ctx, false);
            }

            gen.EndExceptionBlock();

            ctx.CurrentTryBlock = backup;
        }

        protected override Type resolve(Context ctx, bool mustReturn)
        {
            if(ctx.CurrentMethod.IsStatic)
                error("Cannot access self-reference in static context!");

            return ctx.CurrentType.TypeBuilder;
        }

 protected override void emitCode(Context ctx, bool mustReturn)
 {
     if (_Indexer == null)
         emitSetArray(ctx);
     else
         emitSetCustomIndexer(ctx);
 }

        protected override NodeBase expand(Context ctx, bool mustReturn)
        {
            var leftType = LeftOperand.Resolve(ctx, mustReturn);

            // create a lambda expression that passes the result of left function to the right one
            if (leftType.IsCallableType())
            {
                var leftVar = ctx.Unique.TempVariableName();
                var rightVar = ctx.Unique.TempVariableName();
                var delegateType = ReflectionHelper.WrapDelegate(leftType);
                var argDefs = delegateType.ArgumentTypes.Select(x => Expr.Arg(ctx.Unique.AnonymousArgName(), x.FullName)).ToArray();

                return Expr.Lambda(
                    argDefs,
                    Expr.Block(
                        Expr.Let(leftVar, LeftOperand),
                        Expr.Let(rightVar, RightOperand),
                        Expr.Invoke(
                            Expr.Get(rightVar),
                            Expr.Invoke(
                                Expr.Get(leftVar),
                                argDefs.Select(x => Expr.Get(x.Name)).ToArray()
                            )
                        )
                    )
                );
            }

            return base.expand(ctx, mustReturn);
        }

        protected override void compileOperator(Context ctx)
        {
            var gen = ctx.CurrentILGenerator;

            Operand.Compile(ctx, true);
            gen.EmitNegate();
        }

        protected override System.Type resolveExpressionType(Context ctx, bool mustReturn = true)
        {
            if(ctx.CurrentMethod.IsStatic)
                Error("Cannot access self-reference in static context!");

            return ctx.CurrentType.TypeBuilder;
        }

        protected override void emitCode(Context ctx, bool mustReturn)
        {
            var gen = ctx.CurrentMethod.Generator;

            Expr.Cast<int>(Size).Emit(ctx, true);
            gen.EmitCreateArray(Type);
        }