Ejemplo n.º 1
1
 /// <summary>
 /// Creates an expression that copies a coplex array value from the source to the target. The value will be cloned as well using the dictionary to reuse already cloned objects.
 /// </summary>
 /// <param name="sourceField"></param>
 /// <param name="targetField"></param>
 /// <param name="type"></param>
 /// <param name="objectDictionary"></param>
 /// <returns></returns>
 internal static Expression CreateCopyComplexArrayTypeFieldExpression(Expression sourceField, Expression targetField, Type type, ParameterExpression objectDictionary) {
     return Expression.IfThenElse(
         Expression.Call(objectDictionary, _dictionaryContainsKey, sourceField),
         Expression.Assign(targetField, Expression.Convert(Expression.Call(objectDictionary, _dictionaryGetItem, sourceField), type)),
         Expression.Assign(targetField, Expression.Convert(Expression.Call(Expression.Call(_getTypeClonerMethodInfo, Expression.Call(sourceField, _getTypeMethodInfo)), _invokeMethodInfo, sourceField, objectDictionary), type))
         );
 }
Ejemplo n.º 2
1
        internal static Expression CreateSetFieldExpression(Expression clone, Expression value, FieldInfo fieldInfo) {
            // workaround for readonly fields: use reflection, this is a lot slower but the only way except using il directly
            if (fieldInfo.IsInitOnly)
                return Expression.Call(Expression.Constant(fieldInfo), _fieldInfoSetValueMethod, clone, Expression.Convert(value, TypeHelper.ObjectType));

            return Expression.Assign(Expression.Field(clone, fieldInfo), value);
        }
 internal ForCSharpStatement(ReadOnlyCollection<ParameterExpression> variables, ReadOnlyCollection<Expression> initializers, Expression test, ReadOnlyCollection<Expression> iterators, Expression body, LabelTarget breakLabel, LabelTarget continueLabel)
     : base(test, body, breakLabel, continueLabel)
 {
     Variables = variables;
     Initializers = initializers;
     Iterators = iterators;
 }
Ejemplo n.º 4
1
 static ElementInit PropertyToElementInit(PropertyInfo propertyInfo, Expression instance)
 {
     return Expression.ElementInit(DictionaryAddMethod,
                                   Expression.Constant(propertyInfo.Name),
                                   Expression.Call(ToStringOrNullMethod,
                                                   Expression.Convert(Expression.Property(instance, propertyInfo), typeof(object))));
 }
        private Expression CreatePropertyAccessExpression(Expression instance, string propertyName)
        {
            CallSiteBinder binder = Binder.GetMember(CSharpBinderFlags.None, propertyName,
                typeof(DynamicPropertyAccessExpressionBuilder), new[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) });

            return Expression.Dynamic(binder, typeof(object), new[] { instance });
        }
Ejemplo n.º 6
1
        public override Expression CompileBulkImporter(EnumStorage enumStorage, Expression writer, ParameterExpression document, ParameterExpression alias, ParameterExpression serializer)
        {
            var method = writeMethod.MakeGenericMethod(typeof(string));
            var dbType = Expression.Constant(DbType);

            return Expression.Call(writer, method, alias, dbType);
        }
Ejemplo n.º 7
1
        void Output(Expression<Func<ContentItem, bool>> expr)
        {
            Debug.WriteLine("expr: " + expr);
            Debug.WriteLine(expr.Body);
            Debug.WriteLine(expr.Parameters[0]);

            var mce = expr.Body as MethodCallExpression;
            Debug.WriteLine("mce: " + mce);
            Debug.WriteLine(mce.Arguments.Count);
            Debug.WriteLine(mce.Arguments[0]);
            Debug.WriteLine(mce.Method);
            Debug.WriteLine(mce.Object);

            var mce2 = mce.Arguments[0] as MethodCallExpression;
            Debug.WriteLine("mce2: " + mce2);
            Debug.WriteLine(mce2.Arguments.Count);
            Debug.WriteLine(mce2.Arguments[0]);
            Debug.WriteLine(mce2.Method);
            Debug.WriteLine(mce2.Object);

            var me = mce2.Arguments[0] as MemberExpression;
            Debug.WriteLine("me: " + me);
            Debug.WriteLine(me.Expression);
            Debug.WriteLine(me.Member);

            var me2 = me.Expression as MemberExpression;
            Debug.WriteLine("me2: " + me2);
            Debug.WriteLine(me2.Expression);
            Debug.WriteLine(me2.Member);

            var pe = me2.Expression as ParameterExpression;
            Debug.WriteLine("pe: " + pe);
            Debug.WriteLine(pe.Name);
            Debug.WriteLine(pe.Type);
        }
		public override Expression VisitExpression(Expression expression)
		{
			if (expression == null)
			{
				return null;
			}

			switch ((NhExpressionType)expression.NodeType)
			{
				case NhExpressionType.Average:
				case NhExpressionType.Min:
				case NhExpressionType.Max:
				case NhExpressionType.Sum:
				case NhExpressionType.Count:
				case NhExpressionType.Distinct:
					return VisitNhAggregate((NhAggregatedExpression)expression);
				case NhExpressionType.New:
					return VisitNhNew((NhNewExpression)expression);
				case NhExpressionType.Star:
					return VisitNhStar((NhStarExpression)expression);
			}

			// Keep this variable for easy examination during debug.
			var expr = base.VisitExpression(expression);
			return expr;
		}
Ejemplo n.º 9
1
 internal Binding(Expression linqExpression, DbExpression cqtExpression)
 {
     //Contract.Requires(linqExpression != null);
     //Contract.Requires(cqtExpression != null);
     LinqExpression = linqExpression;
     CqtExpression = cqtExpression;
 }
Ejemplo n.º 10
1
 private void Gather(Expression expression)
 {
     BinaryExpression b = expression as BinaryExpression;
     if (b != null)
     {
         switch (b.NodeType)
         {
             case ExpressionType.Equal:
             case ExpressionType.NotEqual:
                 if (IsExternalColumn(b.Left) && GetColumn(b.Right) != null)
                 {
                     this.columns.Add(GetColumn(b.Right));
                 }
                 else if (IsExternalColumn(b.Right) && GetColumn(b.Left) != null)
                 {
                     this.columns.Add(GetColumn(b.Left));
                 }
                 break;
             case ExpressionType.And:
             case ExpressionType.AndAlso:
                 if (b.Type == typeof(bool) || b.Type == typeof(bool?))
                 {
                     this.Gather(b.Left);
                     this.Gather(b.Right);
                 }
                 break;
         }
     }
 }
Ejemplo n.º 11
1
        public static string ExpressionToString(Expression expr)
        {
            if (propertyDebugView == null)
                propertyDebugView = typeof(Expression).GetTypeInfo().FindDeclaredProperty("DebugView", ReflectionFlag.NoException | ReflectionFlag.NonPublic | ReflectionFlag.Instance);

            return (string)propertyDebugView.GetValue(expr, null);
        }
Ejemplo n.º 12
1
        protected override Expression Visit(Expression exp)
        {
            if(exp != null)
                return base.Visit(exp);

            return exp;
        }
Ejemplo n.º 13
1
        // private static methods
        private static Boolean CanBeEvaluatedLocally(Expression expression, IQueryProvider queryProvider)
        {
            // any operation on a query can't be done locally
            var constantExpression = expression as ConstantExpression;
            if (constantExpression != null)
            {
                var query = constantExpression.Value as IQueryable;
                if (query != null && (queryProvider == null || query.Provider == queryProvider))
                {
                    return false;
                }
            }

            var methodCallExpression = expression as MethodCallExpression;
            if (methodCallExpression != null)
            {
                Type declaringType = methodCallExpression.Method.DeclaringType;
                if (declaringType == typeof (Enumerable) || declaringType == typeof (Queryable))
                {
                    return false;
                }
            }

            if (expression.NodeType == ExpressionType.Convert && expression.Type == typeof (Object))
            {
                return true;
            }

            if (expression.NodeType == ExpressionType.Parameter || expression.NodeType == ExpressionType.Lambda)
            {
                return false;
            }

            return true;
        }
Ejemplo n.º 14
1
 public IEnumerable<ErrorLog> Get(
    Expression<Func<ErrorLog, bool>> filter = null,
    Func<IQueryable<ErrorLog>, IOrderedQueryable<ErrorLog>> orderBy = null,
    string includeProperties = "")
 {
     return _unitOfWork.ErrorLogRepository.Get(filter, orderBy, includeProperties);
 }
        // private static methods
        private static Type GetDocumentType(Expression expression)
        {
            // look for the innermost nested constant of type MongoQueryable<T> and return typeof(T)
            var constantExpression = expression as ConstantExpression;
            if (constantExpression != null)
            {
                var constantType = constantExpression.Type;
                if (constantType.IsGenericType)
                {
                    var genericTypeDefinition = constantType.GetGenericTypeDefinition();
                    if (genericTypeDefinition == typeof(MongoQueryable<>))
                    {
                        return constantType.GetGenericArguments()[0];
                    }
                }
            }

            var methodCallExpression = expression as MethodCallExpression;
            if (methodCallExpression != null && methodCallExpression.Arguments.Count != 0)
            {
                return GetDocumentType(methodCallExpression.Arguments[0]);
            }

            var message = string.Format("Unable to find document type of expression: {0}.", ExpressionFormatter.ToString(expression));
            throw new ArgumentOutOfRangeException(message);
        }
Ejemplo n.º 16
1
 internal UnaryExpression(ExpressionType nodeType, Expression expression, Type type, MethodInfo method)
 {
     _operand = expression;
     _method = method;
     _nodeType = nodeType;
     _type = type;
 }
Ejemplo n.º 17
1
        public static void Parse(SortedSet<string> list, Expression expr)
        {
            if (expr == null)
                return;

            BinaryExpression eb = expr as BinaryExpression;
            MemberExpression em = expr as MemberExpression;
            UnaryExpression eu = expr as UnaryExpression;
            MethodCallExpression ec = expr as MethodCallExpression;


            if (em != null) // member expression
            {
                list.Add(em.Member.Name);
            }
            else if (eb != null) // binary expression
            {
                Parse(list, eb.Left);
                Parse(list, eb.Right);
            }
            else if (eu != null) // unary expression
            {
                Parse(list, eu.Operand);
            }
            else if (ec != null) // call expression
            {
                foreach (var a in ec.Arguments)
                    Parse(list, a);
            }


            return;
        }
 // public methods
 /// <summary>
 /// Pretty prints an Expression.
 /// </summary>
 /// <param name="node">The Expression to pretty print.</param>
 /// <returns>A string containing the pretty printed Expression.</returns>
 public string PrettyPrint(Expression node)
 {
     _sb = new StringBuilder();
     _indentation = "";
     Visit(node);
     return _sb.ToString();
 }
Ejemplo n.º 19
1
			public override Expression BuildExpression(Expression expression, int level)
			{
				var expr = Sequence.BuildExpression(expression, level);

				if (expression == null)
				{
					var q =
						from col in SqlQuery.Select.Columns
						where !col.CanBeNull()
						select SqlQuery.Select.Columns.IndexOf(col);

					var idx = q.DefaultIfEmpty(-1).First();

					if (idx == -1)
						idx = SqlQuery.Select.Add(new SqlValue((int?) 1));

					var n = ConvertToParentIndex(idx, this);

					var e = Expression.Call(
						ExpressionBuilder.DataReaderParam,
						ReflectionHelper.DataReader.IsDBNull,
						Expression.Constant(n)) as Expression;

					var defaultValue = _defaultValue ?? Expression.Constant(null, expr.Type);

					expr = Expression.Condition(e, defaultValue, expr);
				}

				return expr;
			}
Ejemplo n.º 20
1
		EvaluationResult EvaluateUnsupported(Expression expression) {
			try {
				return EvaluationResult.Success(expression.Type, Expression.Lambda<Func<object>>(expression.Box()).Compile()());
			} catch(Exception e) {
				return EvaluationResult.Failure(expression, e);
			}
		}
 protected override Expression VisitBlockHelperExpression(BlockHelperExpression bhex)
 {
     var fb = new FunctionBuilder(CompilationContext.Configuration);
     var body = fb.Compile(((BlockExpression)bhex.Body).Expressions, CompilationContext.BindingContext);
     var inversion = fb.Compile(((BlockExpression)bhex.Inversion).Expressions, CompilationContext.BindingContext);
     var helper = CompilationContext.Configuration.BlockHelpers[bhex.HelperName.Replace("#", "")];
     var arguments = new Expression[]
     {
         Expression.Property(
             CompilationContext.BindingContext,
             typeof(BindingContext).GetProperty("TextWriter")),
         Expression.New(
                 typeof(HelperOptions).GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic)[0],
                 body,
                 inversion),
         Expression.Property(
             CompilationContext.BindingContext,
             typeof(BindingContext).GetProperty("Value")),
         Expression.NewArrayInit(typeof(object), bhex.Arguments)
     };
     if (helper.Target != null)
     {
         return Expression.Call(
             Expression.Constant(helper.Target),
             helper.Method,
             arguments);
     }
     else
     {
         return Expression.Call(
             helper.Method,
             arguments);
     }
 }
Ejemplo n.º 22
0
		public override SqlInfo[] ConvertToSql(Expression expression, int level, ConvertFlags flags)
		{
			return SubQuery
				.ConvertToIndex(expression, level, flags)
				.Select(idx => new SqlInfo { Sql = SubQuery.SqlQuery.Select.Columns[idx.Index], Member = idx.Member })
				.ToArray();
		}
    public GroupJoinExpressionNode (
        MethodCallExpressionParseInfo parseInfo, 
        Expression innerSequence,
        LambdaExpression outerKeySelector,
        LambdaExpression innerKeySelector,
        LambdaExpression resultSelector)
        : base(parseInfo)
    {
      ArgumentUtility.CheckNotNull ("innerSequence", innerSequence);
      ArgumentUtility.CheckNotNull ("outerKeySelector", outerKeySelector);
      ArgumentUtility.CheckNotNull ("innerKeySelector", innerKeySelector);
      ArgumentUtility.CheckNotNull ("resultSelector", resultSelector);

      if (outerKeySelector.Parameters.Count != 1)
        throw new ArgumentException ("Outer key selector must have exactly one parameter.", "outerKeySelector");
      if (innerKeySelector.Parameters.Count != 1)
        throw new ArgumentException ("Inner key selector must have exactly one parameter.", "innerKeySelector");
      if (resultSelector.Parameters.Count != 2)
        throw new ArgumentException ("Result selector must have exactly two parameters.", "resultSelector");

      var joinResultSelector = Expression.Lambda (Expression.Constant (null), outerKeySelector.Parameters[0], innerKeySelector.Parameters[0]);
      JoinExpressionNode = new JoinExpressionNode (parseInfo, innerSequence, outerKeySelector, innerKeySelector, joinResultSelector);
      
      ResultSelector = resultSelector;
      _cachedResultSelector = new ResolvedExpressionCache<Expression> (this);
    }
        /// <summary>
        /// Adds an additional Instance constructed by a Lambda Expression using IContext
        /// </summary>
        /// <param name="func"></param>
        /// <returns></returns>
        public LambdaInstance<object> Add(Expression<Func<IContext, object>> func)
        {
            var instance = new LambdaInstance<object>(func);
            Add(instance);

            return instance;
        }
Ejemplo n.º 25
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 private bool IsExternalColumn(Expression exp)
 {
     var col = GetColumn(exp);
     if (col != null && !this.aliases.Contains(col.Alias))
         return true;
     return false;
 }
Ejemplo n.º 26
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            /// <summary>
            /// Visit an expression. For each expression first make sure that it has been
            /// translated and parameter replaced. We do this recusively...
            /// </summary>
            /// <param name="expression"></param>
            /// <returns></returns>
            public override Expression Visit(Expression expression)
            {
                //
                // Sometimes we are called with a null - we ignore that! :-)
                //

                if (expression == null)
                    return null;

                ///
                /// See if there are any parameter replacements that can be done out-of-band
                /// 

                var expr = ParameterReplacementExpressionVisitor.ReplaceParameters(expression, CodeContext);

                //
                // Next, attempt to translate the expr (if needed). This deals with moving from
                // one pre-done space to another.
                // 

                string oldExpr = "";
                while (expr.ToString() != oldExpr)
                {
                    oldExpr = expr.ToString();
                    expr = TranslatingExpressionVisitor.Translate(expr, CodeContext.CacheCookies, e => e.Resolve(GeneratedCode, CodeContext, MEFContainer));
                }

                //
                // Now do the rest of the parsing.
                //

                return base.Visit(expr);
            }
Ejemplo n.º 27
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        protected override Expression Visit(Expression exp)
        {
            if (_candidates.Contains(exp))
            {
                if (exp.NodeType == (ExpressionType)MongoExpressionType.Field)
                {
                    var field = (FieldExpression)exp;
                    FieldExpression mapped;
                    if (_map.TryGetValue(field, out mapped))
                        return mapped;

                    Alias alias = _existingAliases.Contains(field.Alias) ? field.Alias : _newAlias;
                    var fieldName = GetUniqueFieldName(field.Name);
                    _fields.Add(new FieldDeclaration(fieldName, field));
                    return new FieldExpression(exp, alias, field.Name);
                }
                else
                {
                    var fieldName = GetNextFieldName();
                    _fields.Add(new FieldDeclaration(fieldName, exp));
                    return new FieldExpression(exp, _newAlias, fieldName);
                }
            }
            return base.Visit(exp);
        }
Ejemplo n.º 28
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 internal TryExpression(Type type, Expression body, Expression @finally, Expression fault, ReadOnlyCollection<CatchBlock> handlers) {
     _type = type;
     _body = body;
     _handlers = handlers;
     _finally = @finally;
     _fault = fault;
 }
    public Expression ResolvePotentialEntity (Expression expression)
    {
      ArgumentUtility.CheckNotNull ("expression", expression);

      var strippedExpression = StripConversions (expression);

      var namedExpression = strippedExpression as NamedExpression;
      if (namedExpression != null)
      {
        var result = ResolvePotentialEntity (namedExpression.Expression);
        if (result != namedExpression.Expression)
          return new NamedExpression (namedExpression.Name, result);

        return expression;
      }

      var entityExpression = strippedExpression as SqlEntityExpression;
      if (entityExpression != null)
        return entityExpression.GetIdentityExpression ();

      var entityConstantExpression = strippedExpression as SqlEntityConstantExpression;
      if (entityConstantExpression != null)
        return entityConstantExpression.IdentityExpression;

      var entityRefMemberExpression = strippedExpression as SqlEntityRefMemberExpression;
      if (entityRefMemberExpression != null)
        return GetIdentityExpressionForReferencedEntity (entityRefMemberExpression);

      var sqlSubStatementExpression = strippedExpression as SqlSubStatementExpression;
      if (sqlSubStatementExpression != null)
        return CheckAndSimplifyEntityWithinSubStatement (sqlSubStatementExpression);

      return expression;
    }
Ejemplo n.º 30
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        /// <summary>
        /// Provides language specific query translation.  Use this to apply language specific rewrites or
        /// to make assertions/validations about the query.
        /// </summary>
        /// <param name="expression"></param>
        /// <returns></returns>
        public virtual Expression Translate(Expression expression)
        {
            // remove redundant layers again before cross apply rewrite
            expression = UnusedColumnRemover.Remove(expression);
            expression = RedundantColumnRemover.Remove(expression);
            expression = RedundantSubqueryRemover.Remove(expression);

            // convert cross-apply and outer-apply joins into inner & left-outer-joins if possible
            var rewritten = CrossApplyRewriter.Rewrite(this._language, expression);

            // convert cross joins into inner joins
            rewritten = CrossJoinRewriter.Rewrite(rewritten);

            if (rewritten != expression)
            {
                expression = rewritten;
                // do final reduction
                expression = UnusedColumnRemover.Remove(expression);
                expression = RedundantSubqueryRemover.Remove(expression);
                expression = RedundantJoinRemover.Remove(expression);
                expression = RedundantColumnRemover.Remove(expression);
            }

            return expression;
        }
Ejemplo n.º 31
0
 public T Find(Expression <Func <T, bool> > criteria)
 {
     return(_query.FirstOrDefault(criteria));
 }
Ejemplo n.º 32
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 public LambdaExpressionVistor(L.ParameterExpression context, EvaluateOptions options)
 {
     _context = context;
     _options = options;
 }
Ejemplo n.º 33
0
        public override void Visit(BinaryExpression expression)
        {
            expression.LeftExpression.Accept(this);
            var left = _result;

            expression.RightExpression.Accept(this);
            var right = _result;

            switch (expression.Type)
            {
            case BinaryExpressionType.And:
                _result = L.Expression.AndAlso(left, right);
                break;

            case BinaryExpressionType.Or:
                _result = L.Expression.OrElse(left, right);
                break;

            case BinaryExpressionType.NotEqual:
                _result = WithCommonNumericType(left, right, L.Expression.NotEqual, expression.Type);
                break;

            case BinaryExpressionType.LesserOrEqual:
                _result = WithCommonNumericType(left, right, L.Expression.LessThanOrEqual, expression.Type);
                break;

            case BinaryExpressionType.GreaterOrEqual:
                _result = WithCommonNumericType(left, right, L.Expression.GreaterThanOrEqual, expression.Type);
                break;

            case BinaryExpressionType.Lesser:
                _result = WithCommonNumericType(left, right, L.Expression.LessThan, expression.Type);
                break;

            case BinaryExpressionType.Greater:
                _result = WithCommonNumericType(left, right, L.Expression.GreaterThan, expression.Type);
                break;

            case BinaryExpressionType.Equal:
                _result = WithCommonNumericType(left, right, L.Expression.Equal, expression.Type);
                break;

            case BinaryExpressionType.Minus:
                if (Checked)
                {
                    _result = WithCommonNumericType(left, right, L.Expression.SubtractChecked);
                }
                else
                {
                    _result = WithCommonNumericType(left, right, L.Expression.Subtract);
                }
                break;

            case BinaryExpressionType.Plus:
                if (Checked)
                {
                    _result = WithCommonNumericType(left, right, L.Expression.AddChecked);
                }
                else
                {
                    _result = WithCommonNumericType(left, right, L.Expression.Add);
                }
                break;

            case BinaryExpressionType.Modulo:
                _result = WithCommonNumericType(left, right, L.Expression.Modulo);
                break;

            case BinaryExpressionType.Div:
                _result = WithCommonNumericType(left, right, L.Expression.Divide);
                break;

            case BinaryExpressionType.Times:
                if (Checked)
                {
                    _result = WithCommonNumericType(left, right, L.Expression.MultiplyChecked);
                }
                else
                {
                    _result = WithCommonNumericType(left, right, L.Expression.Multiply);
                }
                break;

            case BinaryExpressionType.BitwiseOr:
                _result = L.Expression.Or(left, right);
                break;

            case BinaryExpressionType.BitwiseAnd:
                _result = L.Expression.And(left, right);
                break;

            case BinaryExpressionType.BitwiseXOr:
                _result = L.Expression.ExclusiveOr(left, right);
                break;

            case BinaryExpressionType.LeftShift:
                _result = L.Expression.LeftShift(left, right);
                break;

            case BinaryExpressionType.RightShift:
                _result = L.Expression.RightShift(left, right);
                break;

            default:
                throw new ArgumentOutOfRangeException();
            }
        }
Ejemplo n.º 34
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        private Microsoft.Scripting.Ast.LightExpression <Func <CodeContext, CodeContext> > MakeClassBody()
        {
            // we always need to create a nested context for class defs

            var init   = new List <MSAst.Expression>();
            var locals = new ReadOnlyCollectionBuilder <MSAst.ParameterExpression>();

            locals.Add(LocalCodeContextVariable);
            locals.Add(PythonAst._globalContext);

            init.Add(Ast.Assign(PythonAst._globalContext, new GetGlobalContextExpression(_parentContextParam)));

            GlobalParent.PrepareScope(locals, init);

            CreateVariables(locals, init);

            var createLocal = CreateLocalContext(_parentContextParam);

            init.Add(Ast.Assign(LocalCodeContextVariable, createLocal));

            List <MSAst.Expression> statements = new List <MSAst.Expression>();

            // Create the body
            MSAst.Expression bodyStmt = _body;

            // __module__ = __name__
            MSAst.Expression modStmt = AssignValue(GetVariableExpression(_modVariable), GetVariableExpression(_modNameVariable));

            string doc = GetDocumentation(_body);

            if (doc != null)
            {
                statements.Add(
                    AssignValue(
                        GetVariableExpression(_docVariable),
                        AstUtils.Constant(doc)
                        )
                    );
            }

            if (_body.CanThrow && GlobalParent.PyContext.PythonOptions.Frames)
            {
                bodyStmt = AddFrame(LocalContext, FuncCodeExpr, bodyStmt);
                locals.Add(FunctionStackVariable);
            }

            bodyStmt = WrapScopeStatements(
                Ast.Block(
                    Ast.Block(init),
                    statements.Count == 0 ?
                    EmptyBlock :
                    Ast.Block(new ReadOnlyCollection <MSAst.Expression>(statements)),
                    modStmt,
                    bodyStmt,
                    LocalContext
                    ),
                _body.CanThrow
                );

            var lambda = AstUtils.LightLambda <Func <CodeContext, CodeContext> >(
                typeof(CodeContext),
                Ast.Block(
                    locals,
                    bodyStmt
                    ),
                Name + "$" + Interlocked.Increment(ref _classId),
                new[] { _parentContextParam }
                );

            return(lambda);
        }
Ejemplo n.º 35
0
Archivo: Py.cs Proyecto: alexphaus/py
 Exp GlobalAccess(string name)
 {
     return(Exp.Property(_G, "Item", Exp.Constant(name)));
 }
Ejemplo n.º 36
0
        internal MSAst.Expression TransformAndDynamicConvert(Expression expression, Type /*!*/ type)
        {
            Debug.Assert(expression != null);

            MSAst.Expression res = expression;

            // Do we need conversion?
            if (!CanAssign(type, expression.Type))
            {
                // ensure we're reduced before we check for dynamic expressions.

                var reduced = expression.Reduce();
                if (reduced is LightDynamicExpression)
                {
                    reduced = reduced.Reduce();
                }

                // Add conversion step to the AST
                MSAst.DynamicExpression    ae  = reduced as MSAst.DynamicExpression;
                ReducableDynamicExpression rde = reduced as ReducableDynamicExpression;

                if ((ae != null && ae.Binder is PythonBinaryOperationBinder) ||
                    (rde != null && rde.Binder is PythonBinaryOperationBinder))
                {
                    // create a combo site which does the conversion
                    PythonBinaryOperationBinder binder;
                    IList <MSAst.Expression>    args;
                    if (ae != null)
                    {
                        binder = (PythonBinaryOperationBinder)ae.Binder;
                        args   = ArrayUtils.ToArray(ae.Arguments);
                    }
                    else
                    {
                        binder = (PythonBinaryOperationBinder)rde.Binder;
                        args   = rde.Args;
                    }

                    ParameterMappingInfo[] infos = new ParameterMappingInfo[args.Count];
                    for (int i = 0; i < infos.Length; i++)
                    {
                        infos[i] = ParameterMappingInfo.Parameter(i);
                    }

                    res = Expression.Dynamic(
                        GlobalParent.PyContext.BinaryOperationRetType(
                            binder,
                            GlobalParent.PyContext.Convert(
                                type,
                                ConversionResultKind.ExplicitCast
                                )
                            ),
                        type,
                        args
                        );
                }
                else
                {
                    res = GlobalParent.Convert(
                        type,
                        ConversionResultKind.ExplicitCast,
                        reduced
                        );
                }
            }
            return(res);
        }
Ejemplo n.º 37
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 /// <summary>
 /// Removes the frames from generated code for when we're compiling the tracing delegate
 /// which will track the frames it's self.
 /// </summary>
 internal static MSAst.Expression RemoveFrame(MSAst.Expression expression)
 {
     return(new FramedCodeVisitor().Visit(expression));
 }
Ejemplo n.º 38
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 public T Find <T>(Expression <Func <T, bool> > criteria) where T : class
 {
     return(All <T>().Where(criteria).FirstOrDefault());
 }
Ejemplo n.º 39
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            public IEnumerable <T> FindAll(Expression <Func <T, bool> > criteria, int offset = 0, int limit = 0, Sorting <T> orderBy = null)
            {
                var query = _query.Where(criteria);

                return(_repository.Page(query, offset, limit, orderBy));
            }
Ejemplo n.º 40
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        public IEnumerable <T> FindAll <T>(Expression <Func <T, bool> > criteria, int offset = 0, int limit = 0, Sorting <T> orderBy = null) where T : class
        {
            var query = All <T>().Where(criteria);

            return(this.Page(query, offset, limit, orderBy));
        }
Ejemplo n.º 41
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 public override void Visit(ValueExpression expression)
 {
     _result = L.Expression.Constant(expression.Value);
 }
Ejemplo n.º 42
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 public SiteInfo(DynamicMetaObjectBinder /*!*/ binder, MSAst.Expression /*!*/ expr, FieldInfo /*!*/ field, int index, Type /*!*/ delegateType, Type /*!*/ siteType)
     : this(binder, expr, field, index, delegateType)
 {
     _siteType = siteType;
 }
Ejemplo n.º 43
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 public static IQueryable <T> WhereIf <T>(this IQueryable <T> source, bool condition, Linq.Expressions.Expression <Func <T, int, bool> > predicate)
 {
     return(condition ? source.Where(predicate) : source);
 }
Ejemplo n.º 44
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        internal override MSAst.Expression TransformSet(SourceSpan span, MSAst.Expression right, PythonOperationKind op)
        {
            // if we just have a simple named multi-assignment  (e.g. a, b = 1,2)
            // then go ahead and step over the entire statement at once.  If we have a
            // more complex statement (e.g. a.b, c.d = 1, 2) then we'll step over the
            // sets individually as they could be property sets the user wants to step
            // into.  TODO: Enable stepping of the right hand side?
            bool emitIndividualSets = false;

            foreach (Expression e in _items)
            {
                if (IsComplexAssignment(e))
                {
                    emitIndividualSets = true;
                    break;
                }
            }

            SourceSpan rightSpan = SourceSpan.None;
            SourceSpan leftSpan  =
                (Span.Start.IsValid && span.IsValid) ?
                new SourceSpan(Span.Start, span.End) :
                SourceSpan.None;

            SourceSpan totalSpan = SourceSpan.None;

            if (emitIndividualSets)
            {
                rightSpan = span;
                leftSpan  = SourceSpan.None;
                totalSpan = (Span.Start.IsValid && span.IsValid) ?
                            new SourceSpan(Span.Start, span.End) :
                            SourceSpan.None;
            }

            // 1. Evaluate the expression and assign the value to the temp.
            MSAst.ParameterExpression right_temp = Ast.Variable(typeof(object), "unpacking");

            // 2. Add the assignment "right_temp = right" into the suite/block
            MSAst.Expression assignStmt1 = MakeAssignment(right_temp, right);

            int expected    = _items.Length;
            int argcntafter = -1;

            for (var i = 0; i < _items.Length; i++)
            {
                var item = _items[i];
                if (item is StarredExpression)
                {
                    expected    = i;
                    argcntafter = _items.Length - i - 1;
                    break;
                }
            }

            // 3. Call GetEnumeratorValues on the right side (stored in temp)
            MSAst.Expression enumeratorValues = Expression.Convert(LightExceptions.CheckAndThrow(
                                                                       Expression.Call(
                                                                           // method
                                                                           argcntafter != -1 ?
                                                                           AstMethods.UnpackIterable :
                                                                           emitIndividualSets ?
                                                                           AstMethods.GetEnumeratorValues :
                                                                           AstMethods.GetEnumeratorValuesNoComplexSets,
                                                                           // arguments
                                                                           Parent.LocalContext,
                                                                           right_temp,
                                                                           AstUtils.Constant(expected),
                                                                           AstUtils.Constant(argcntafter)
                                                                           )
                                                                       ), typeof(object[]));

            // 4. Create temporary variable for the array
            MSAst.ParameterExpression array_temp = Ast.Variable(typeof(object[]), "array");

            // 5. Assign the value of the method call (mce) into the array temp
            // And add the assignment "array_temp = Ops.GetEnumeratorValues(...)" into the block
            MSAst.Expression assignStmt2 = MakeAssignment(
                array_temp,
                enumeratorValues,
                rightSpan
                );

            ReadOnlyCollectionBuilder <MSAst.Expression> sets = new ReadOnlyCollectionBuilder <MSAst.Expression>(_items.Length + 1);

            for (int i = 0; i < _items.Length; i++)
            {
                // target = array_temp[i]

                Expression target = _items[i];
                if (target == null)
                {
                    continue;
                }

                // 6. array_temp[i]
                MSAst.Expression element = Ast.ArrayAccess(
                    array_temp,                             // array expression
                    AstUtils.Constant(i)                    // index
                    );

                // 7. target = array_temp[i], and add the transformed assignment into the list of sets
                MSAst.Expression set = target.TransformSet(
                    emitIndividualSets ?                    // span
                    target.Span :
                    SourceSpan.None,
                    element,
                    PythonOperationKind.None
                    );
                sets.Add(set);
            }
            // 9. add the sets as their own block so they can be marked as a single span, if necessary.
            sets.Add(AstUtils.Empty());
            MSAst.Expression itemSet = GlobalParent.AddDebugInfo(Ast.Block(sets.ToReadOnlyCollection()), leftSpan);

            // 10. Return the suite statement (block)
            return(GlobalParent.AddDebugInfo(Ast.Block(new[] { array_temp, right_temp }, assignStmt1, assignStmt2, itemSet, AstUtils.Empty()), totalSpan));
        }
Ejemplo n.º 45
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            public ILoadService <T> Include <TProperty>(Expression <Func <T, TProperty> > path)
                where TProperty : class
            {
                var properties = path.Body.ToString().Split('.').Where(p => !p.StartsWith("Select")).Select(p => p.TrimEnd(')')).ToArray();

                if (properties.Length == 2)
                {
                    if (typeof(IEnumerable).IsAssignableFrom(typeof(TProperty)))
                    {
                        ((IQueryable <T>)_fetchMany.Invoke(null, new object[] { _query, path })).ToFuture();
                    }
                    else
                    {
                        _query.Fetch(path).ToFuture();
                    }
                }
                else if (properties.Length > 2)
                {
                    var            current = typeof(T);
                    IQueryable <T> query   = null;
                    for (var i = 1; i < properties.Length; i++)
                    {
                        if (i == 1)
                        {
                            if (typeof(IEnumerable).IsAssignableFrom(typeof(TProperty)))
                            {
                                query   = (IQueryable <T>)_fetchMany.Invoke(null, new object[] { _query, path });
                                current = typeof(TProperty).GetGenericArguments()[0];
                            }
                            else
                            {
                                query   = _query.Fetch(path);
                                current = typeof(TProperty);
                            }
                        }
                        else
                        {
                            var property = current.GetProperty(properties[i]);
                            if (property == null)
                            {
                                break;
                            }

                            var propertyType = property.PropertyType;
                            var parameter    = Expression.Parameter(current);
                            var body         = Expression.Convert(Expression.PropertyOrField(parameter, properties[i]), propertyType);
                            var selector     = Expression.Lambda(body, parameter);

                            if (typeof(IEnumerable).IsAssignableFrom(propertyType))
                            {
                                query   = (IQueryable <T>)_thenFetchMany.Invoke(null, new object[] { query, selector });
                                current = propertyType.GetGenericArguments()[0];
                            }
                            else
                            {
                                query   = (IQueryable <T>)_thenFetch.Invoke(null, new object[] { query, selector });
                                current = propertyType;
                            }
                        }
                    }
                    query.ToFuture();
                }
                return(this);
            }
Ejemplo n.º 46
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 public long Count <T>(Expression <Func <T, bool> > criteria) where T : class
 {
     return(All <T>().LongCount(criteria));
 }
Ejemplo n.º 47
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 /// <summary>
 /// Creates a method frame for tracking purposes and enforces recursion
 /// </summary>
 internal static MSAst.Expression AddFrame(MSAst.Expression localContext, MSAst.Expression codeObject, MSAst.Expression body)
 {
     return(new FramedCodeExpression(localContext, codeObject, body));
 }
Ejemplo n.º 48
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Archivo: Body.cs Proyecto: ltwlf/IronSP
        private MSA.Expression /*!*/ TransformExceptionHandling(AstGenerator /*!*/ gen, ResultOperation resultOperation)
        {
            Assert.NotNull(gen);

            MSA.Expression exceptionThrownVariable  = gen.CurrentScope.DefineHiddenVariable("#exception-thrown", typeof(bool));
            MSA.Expression exceptionRethrowVariable = gen.CurrentScope.DefineHiddenVariable("#exception-rethrow", typeof(bool));
            MSA.Expression retryingVariable         = gen.CurrentScope.DefineHiddenVariable("#retrying", typeof(bool));
            MSA.Expression oldExceptionVariable     = gen.CurrentScope.DefineHiddenVariable("#old-exception", typeof(Exception));

            MSA.ParameterExpression unwinder, exceptionVariable;
            MSA.Expression          transformedBody;
            MSA.Expression          transformedEnsure;
            MSA.Expression          transformedElse;

            if (_ensureStatements != null)
            {
                transformedEnsure = Ast.Block(
                    // ensure:
                    Ast.Assign(oldExceptionVariable, Methods.GetCurrentException.OpCall(gen.CurrentScopeVariable)),
                    gen.TransformStatements(_ensureStatements, ResultOperation.Ignore),
                    Methods.SetCurrentException.OpCall(gen.CurrentScopeVariable, oldExceptionVariable),

                    // rethrow:
                    AstUtils.IfThen(
                        Ast.AndAlso(
                            exceptionRethrowVariable,
                            Ast.NotEqual(oldExceptionVariable, AstUtils.Constant(null))
                            ),
                        Ast.Throw(oldExceptionVariable)
                        )
                    );
            }
            else
            {
                // rethrow:
                transformedEnsure = AstUtils.IfThen(
                    Ast.AndAlso(
                        exceptionRethrowVariable,
                        Ast.NotEqual(
                            Ast.Assign(oldExceptionVariable, Methods.GetCurrentException.OpCall(gen.CurrentScopeVariable)),
                            AstUtils.Constant(null, typeof(Exception)))
                        ),
                    Ast.Throw(oldExceptionVariable)
                    );
            }

            if (_elseStatements != null)
            {
                transformedElse = gen.TransformStatements(_elseStatements, resultOperation);
            }
            else
            {
                transformedElse = AstUtils.Empty();
            }

            // body should do return, but else-clause is present => we cannot do return from the guarded statements:
            // (the value of the last expression in the body cannot be the last executed expression statement => we can ignore it):
            transformedBody = gen.TransformStatements(_statements, (_elseStatements != null) ? ResultOperation.Ignore : resultOperation);

            MSA.Expression enterRescue = null, leaveRescue = null;
            var            retryLabel = Ast.Label("retry");

            // make rescue clause:
            MSA.Expression transformedRescue;
            if (_rescueClauses != null)
            {
                // outer-most EH blocks sets and clears runtime flag RuntimeFlowControl.InTryRescue:
                if (gen.CurrentRescue == null)
                {
                    enterRescue = Methods.EnterRescue.OpCall(gen.CurrentScopeVariable);
                    leaveRescue = Methods.LeaveRescue.OpCall(gen.CurrentScopeVariable);
                }
                else
                {
                    enterRescue = leaveRescue = AstUtils.Empty();
                }

                gen.EnterRescueClause(retryingVariable, retryLabel);

                var handlers = new IfStatementTest[_rescueClauses.Count];
                for (int i = 0; i < handlers.Length; i++)
                {
                    handlers[i] = _rescueClauses[i].Transform(gen, resultOperation);
                }

                transformedRescue =
                    AstUtils.Try(
                        enterRescue,
                        AstUtils.If(handlers, Ast.Assign(exceptionRethrowVariable, AstUtils.Constant(true)))
                        ).Filter(unwinder = Ast.Parameter(typeof(EvalUnwinder), "#u"),
                                 Ast.Equal(Ast.Field(unwinder, EvalUnwinder.ReasonField), AstUtils.Constant(BlockReturnReason.Retry)),

                                 Ast.Block(
                                     Ast.Assign(retryingVariable, AstUtils.Constant(true)),
                                     Ast.Continue(retryLabel),
                                     AstUtils.Empty()
                                     )
                                 );


                gen.LeaveRescueClause();
            }
            else
            {
                transformedRescue = Ast.Assign(exceptionRethrowVariable, AstUtils.Constant(true));
            }

            if (_elseStatements != null)
            {
                transformedElse = AstUtils.Unless(exceptionThrownVariable, transformedElse);
            }

            var result = Ast.Block(
                Ast.Label(retryLabel),
                AstUtils.Try(
                    Ast.Assign(exceptionThrownVariable, AstUtils.Constant(false)),
                    Ast.Assign(exceptionRethrowVariable, AstUtils.Constant(false)),
                    Ast.Assign(retryingVariable, AstUtils.Constant(false)),

                    // save exception (old_$! is not used unless there is a rescue clause):
                    (_rescueClauses == null) ? (MSA.Expression)AstUtils.Empty() :
                    Ast.Assign(oldExceptionVariable, Methods.GetCurrentException.OpCall(gen.CurrentScopeVariable)),

                    AstUtils.Try(
                        Ast.Block(transformedBody, AstUtils.Empty())
                        ).Filter(exceptionVariable = Ast.Parameter(typeof(Exception), "#e"),
                                 Methods.CanRescue.OpCall(gen.CurrentScopeVariable, exceptionVariable),

                                 Ast.Assign(exceptionThrownVariable, AstUtils.Constant(true)),
                                 transformedRescue,
                                 AstUtils.Empty()
                                 ).FinallyIf((_rescueClauses != null),
                                             // restore previous exception if the current one has been handled:
                                             AstUtils.Unless(exceptionRethrowVariable,
                                                             Methods.SetCurrentException.OpCall(gen.CurrentScopeVariable, oldExceptionVariable)
                                                             ),
                                             leaveRescue
                                             ),

                    // unless (exception_thrown) do <else-statements> end
                    transformedElse,
                    AstUtils.Empty()
                    ).FilterIf((_rescueClauses != null || _elseStatements != null),
                               exceptionVariable = Ast.Parameter(typeof(Exception), "#e"),
                               Methods.CanRescue.OpCall(gen.CurrentScopeVariable, exceptionVariable),

                               Ast.Assign(exceptionRethrowVariable, AstUtils.Constant(true)),
                               AstUtils.Empty()
                               ).FinallyWithJumps(
                    AstUtils.Unless(retryingVariable, transformedEnsure)
                    )
                );

            return(result);
        }
Ejemplo n.º 49
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Archivo: Py.cs Proyecto: alexphaus/py
 Exp AsBool(Exp expr)
 {
     return(Exp.Property(expr, "b"));
 }
Ejemplo n.º 50
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 public MSAst.Expression Register(MSAst.Expression registeredTo)
 {
     return(MSAst.Expression.Dynamic(LanguageContext.CreateSetMemberBinder(Name, false, true, true), typeof(object), registeredTo, TransformProperty(registeredTo)));
 }
Ejemplo n.º 51
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        internal static MSAst.Expression /*!*/ AssignValue(MSAst.Expression /*!*/ expression, MSAst.Expression value)
        {
            Debug.Assert(expression != null);
            Debug.Assert(value != null);

            IPythonVariableExpression pyGlobal = expression as IPythonVariableExpression;

            if (pyGlobal != null)
            {
                return(pyGlobal.Assign(value));
            }

            return(Ast.Assign(expression, value));
        }
 public bool CanHandleConstructionOf(Expression expression)
 {
     return(false);
 }
Ejemplo n.º 53
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        public MSAst.Expression /*!*/ Dynamic(DynamicMetaObjectBinder /*!*/ binder, Type /*!*/ retType, MSAst.Expression /*!*/ arg0)
        {
            if (retType == typeof(object))
            {
                return(new PythonDynamicExpression1(binder, this, arg0));
            }
            else if (retType == typeof(bool))
            {
                return(new PythonDynamicExpression1 <bool>(binder, this, arg0));
            }

            return(ReduceDynamic(binder, retType, arg0));
        }
Ejemplo n.º 54
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 public SiteInfoLarge(DynamicMetaObjectBinder /*!*/ binder, MSAst.Expression /*!*/ expr, FieldInfo /*!*/ field, int index, Type /*!*/ delegateType)
     : base(binder, expr, field, index, delegateType)
 {
 }
Ejemplo n.º 55
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 internal MSAst.Expression MakeAssignment(MSAst.ParameterExpression variable, MSAst.Expression right, SourceSpan span)
 {
     return(GlobalParent.AddDebugInfoAndVoid(Ast.Assign(variable, AstUtils.Convert(right, variable.Type)), span));
 }
Ejemplo n.º 56
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        private L.Expression WithCommonNumericType(L.Expression left, L.Expression right,
                                                   Func <L.Expression, L.Expression, L.Expression> action, BinaryExpressionType expressiontype = BinaryExpressionType.Unknown)
        {
            left  = UnwrapNullable(left);
            right = UnwrapNullable(right);

            if (_options.HasFlag(EvaluateOptions.BooleanCalculation))
            {
                if (left.Type == typeof(bool))
                {
                    left = L.Expression.Condition(left, L.Expression.Constant(1.0), L.Expression.Constant(0.0));
                }

                if (right.Type == typeof(bool))
                {
                    right = L.Expression.Condition(right, L.Expression.Constant(1.0), L.Expression.Constant(0.0));
                }
            }

            var precedence = new[]
            {
                typeof(decimal),
                typeof(double),
                typeof(float),
                typeof(ulong),
                typeof(long),
                typeof(uint),
                typeof(int),
                typeof(ushort),
                typeof(short),
                typeof(byte),
                typeof(sbyte)
            };

            int l = Array.IndexOf(precedence, left.Type);
            int r = Array.IndexOf(precedence, right.Type);

            if (l >= 0 && r >= 0)
            {
                var type = precedence[Math.Min(l, r)];
                if (left.Type != type)
                {
                    left = L.Expression.Convert(left, type);
                }

                if (right.Type != type)
                {
                    right = L.Expression.Convert(right, type);
                }
            }
            L.Expression comparer = null;
            if (IgnoreCaseString)
            {
                if (Ordinal)
                {
                    comparer = L.Expression.Property(null, typeof(StringComparer), "OrdinalIgnoreCase");
                }
                else
                {
                    comparer = L.Expression.Property(null, typeof(StringComparer), "CurrentCultureIgnoreCase");
                }
            }
            else
            {
                comparer = L.Expression.Property(null, typeof(StringComparer), "Ordinal");
            }

            if (comparer != null && (typeof(string).Equals(left.Type) || typeof(string).Equals(right.Type)))
            {
                switch (expressiontype)
                {
                case BinaryExpressionType.Equal: return(L.Expression.Call(comparer, typeof(StringComparer).GetRuntimeMethod("Equals", new[] { typeof(string), typeof(string) }), new L.Expression[] { left, right }));

                case BinaryExpressionType.NotEqual: return(L.Expression.Not(L.Expression.Call(comparer, typeof(StringComparer).GetRuntimeMethod("Equals", new[] { typeof(string), typeof(string) }), new L.Expression[] { left, right })));

                case BinaryExpressionType.GreaterOrEqual: return(L.Expression.GreaterThanOrEqual(L.Expression.Call(comparer, typeof(StringComparer).GetRuntimeMethod("Compare", new[] { typeof(string), typeof(string) }), new L.Expression[] { left, right }), L.Expression.Constant(0)));

                case BinaryExpressionType.LesserOrEqual: return(L.Expression.LessThanOrEqual(L.Expression.Call(comparer, typeof(StringComparer).GetRuntimeMethod("Compare", new[] { typeof(string), typeof(string) }), new L.Expression[] { left, right }), L.Expression.Constant(0)));

                case BinaryExpressionType.Greater: return(L.Expression.GreaterThan(L.Expression.Call(comparer, typeof(StringComparer).GetRuntimeMethod("Compare", new[] { typeof(string), typeof(string) }), new L.Expression[] { left, right }), L.Expression.Constant(0)));

                case BinaryExpressionType.Lesser: return(L.Expression.LessThan(L.Expression.Call(comparer, typeof(StringComparer).GetRuntimeMethod("Compare", new[] { typeof(string), typeof(string) }), new L.Expression[] { left, right }), L.Expression.Constant(0)));
                }
            }
            return(action(left, right));
        }
Ejemplo n.º 57
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 internal static MSAst.Expression /*!*/ MakeAssignment(MSAst.ParameterExpression /*!*/ variable, MSAst.Expression /*!*/ right)
 {
     return(Ast.Assign(variable, AstUtils.Convert(right, variable.Type)));
 }
Ejemplo n.º 58
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 public FramedCodeExpression(MSAst.Expression localContext, MSAst.Expression codeObject, MSAst.Expression body)
 {
     _localContext = localContext;
     _codeObject   = codeObject;
     _body         = body;
 }
Ejemplo n.º 59
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 public abstract MSAst.Expression GetGlobal(MSAst.Expression globalContext, int arrayIndex, PythonVariable variable, PythonGlobal global);
Ejemplo n.º 60
0
        private L.Expression[] PrepareMethodArgumentsIfValid(ParameterInfo[] parameters, L.Expression[] arguments)
        {
            if (!parameters.Any() && !arguments.Any())
            {
                return(arguments);
            }
            if (!parameters.Any())
            {
                return(null);
            }
            bool paramsMatchArguments = true;

            var  lastParameter    = parameters.Last();
            bool hasParamsKeyword = lastParameter.IsDefined(typeof(ParamArrayAttribute));

            if (hasParamsKeyword && parameters.Length > arguments.Length)
            {
                return(null);
            }
            L.Expression[] newArguments            = new L.Expression[parameters.Length];
            L.Expression[] paramsKeywordArgument   = null;
            Type           paramsElementType       = null;
            int            paramsParameterPosition = 0;

            if (!hasParamsKeyword)
            {
                paramsMatchArguments &= parameters.Length == arguments.Length;
                if (!paramsMatchArguments)
                {
                    return(null);
                }
            }
            else
            {
                paramsParameterPosition = lastParameter.Position;
                paramsElementType       = lastParameter.ParameterType.GetElementType();
                paramsKeywordArgument   = new L.Expression[arguments.Length - parameters.Length + 1];
            }

            for (int i = 0; i < arguments.Length; i++)
            {
                var isParamsElement = hasParamsKeyword && i >= paramsParameterPosition;
                var argumentType    = arguments[i].Type;
                var parameterType   = isParamsElement ? paramsElementType : parameters[i].ParameterType;
                paramsMatchArguments &= argumentType == parameterType;
                if (!paramsMatchArguments)
                {
                    return(null);
                }
                if (!isParamsElement)
                {
                    newArguments[i] = arguments[i];
                }
                else
                {
                    paramsKeywordArgument[i - paramsParameterPosition] = arguments[i];
                }
            }

            if (hasParamsKeyword)
            {
                newArguments[paramsParameterPosition] = L.Expression.NewArrayInit(paramsElementType, paramsKeywordArgument);
            }
            return(newArguments);
        }