Increment() public static method

Creates a UnaryExpression that represents the incrementing of the expression by 1.
public static Increment ( Expression expression ) : UnaryExpression
expression Expression An to increment.
return UnaryExpression
Expression Class Documentation
Beispiel #1
0
        protected override Expression1 VisitBinary(BinaryExpression node)
        {
            if (node.NodeType != ExpressionType.Add && node.NodeType != ExpressionType.Subtract)
            {
                return(base.VisitBinary(node));
            }
            if (node.Left.NodeType != ExpressionType.Parameter && node.Left.NodeType != ExpressionType.Constant)
            {
                return(base.VisitBinary(node));
            }

            ParameterExpression param    = (ParameterExpression)node.Left;
            ConstantExpression  constant = (ConstantExpression)node.Right;

            if (constant.Type != typeof(int) || (int)constant.Value != 1)
            {
                return(base.VisitBinary(node));
            }

            if (node.NodeType == ExpressionType.Add)
            {
                return(Expression1.Increment(param));
            }

            return(Expression1.Decrement(param));
        }
Beispiel #2
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        private UnaryExpression UnaryExpression(
            ExpressionType nodeType, System.Type type, JObject obj)
        {
            var operand = this.Prop(obj, "operand", this.Expression);
            var method  = this.Prop(obj, "method", this.Method);

            switch (nodeType)
            {
            case ExpressionType.ArrayLength: return(Expr.ArrayLength(operand));

            case ExpressionType.Convert: return(Expr.Convert(operand, type, method));

            case ExpressionType.ConvertChecked: return(Expr.ConvertChecked(operand, type, method));

            case ExpressionType.Decrement: return(Expr.Decrement(operand, method));

            case ExpressionType.Increment: return(Expr.Increment(operand, method));

            case ExpressionType.IsFalse: return(Expr.IsFalse(operand, method));

            case ExpressionType.IsTrue: return(Expr.IsTrue(operand, method));

            case ExpressionType.Negate: return(Expr.Negate(operand, method));

            case ExpressionType.NegateChecked: return(Expr.NegateChecked(operand, method));

            case ExpressionType.Not: return(Expr.Not(operand, method));

            case ExpressionType.OnesComplement: return(Expr.OnesComplement(operand, method));

            case ExpressionType.PostDecrementAssign: return(Expr.PostDecrementAssign(operand, method));

            case ExpressionType.PostIncrementAssign: return(Expr.PostIncrementAssign(operand, method));

            case ExpressionType.PreDecrementAssign: return(Expr.PreDecrementAssign(operand, method));

            case ExpressionType.PreIncrementAssign: return(Expr.PreIncrementAssign(operand, method));

            case ExpressionType.Quote: return(Expr.Quote(operand));

            case ExpressionType.Throw: return(Expr.Throw(operand, type));

            case ExpressionType.TypeAs: return(Expr.TypeAs(operand, type));

            case ExpressionType.UnaryPlus: return(Expr.UnaryPlus(operand, method));

            case ExpressionType.Unbox: return(Expr.Unbox(operand, type));

            default: throw new NotSupportedException();
            }
        }
Beispiel #3
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        /// <summary>for(loopVar = min; i &lt; max; i++) { loopContent }</summary>
        public static E For(this ParameterExpression loopVar, int min, int max, E loopContent)
        {
            var initAssign = E.Assign(loopVar, E.Constant(min, typeof(int)));

            var breakLabel = E.Label("LoopBreak");

            var loop = E.Block(new[] { loopVar },
                               initAssign,
                               E.Loop(
                                   E.IfThenElse(
                                       E.LessThan(loopVar, E.Constant(max, typeof(int))),
                                       E.Block(
                                           loopContent,
                                           E.Assign(loopVar, E.Increment(loopVar))
                                           ),
                                       E.Break(breakLabel)
                                       ),
                                   breakLabel)
                               );

            return(loop);
        }