Class ItemIndexExpression

Expresses construction of Index value.

Inheritance
object
Expression
CustomExpression
ItemIndexExpression
Inherited Members
Namespace: DotNext.Linq.Expressions
Assembly: DotNext.Metaprogramming.dll
Syntax
public sealed class ItemIndexExpression : CustomExpression

Constructors

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ItemIndexExpression(Expression, bool)

Initializes a new index.

Declaration
public ItemIndexExpression(Expression value, bool fromEnd = false)
Parameters
Type Name Description
Expression value

The index value.
bool fromEnd

A boolean indicating if the index is from the start (false) or from the end (true) of a collection.
Exceptions
Type Condition
ArgumentException

Type of value should be int, short, byte or sbyte.

Fields

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First

The index of the first item in the collection.

Declaration
public static readonly ItemIndexExpression First
Field Value
Type Description
ItemIndexExpression
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Last

The index of the last item in the collection.

Declaration
public static readonly ItemIndexExpression Last
Field Value
Type Description
ItemIndexExpression

Properties

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IsFromEnd

Gets a value that indicates whether the index is from the start or the end.

Declaration
public bool IsFromEnd { get; }
Property Value
Type Description
bool

true if the Index is from the end; otherwise, false.
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Type

Gets result type of asynchronous operation.

Declaration
public override Type Type { get; }
Property Value
Type Description
Type
Overrides
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Value

Gets the offset value.

Declaration
public Expression Value { get; }
Property Value
Type Description
Expression

The offset value.

Methods

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Reduce()

Translates this expression into predefined set of expressions using Lowering technique.

Declaration
public override Expression Reduce()
Returns
Type Description
Expression

Translated expression.
Overrides
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VisitChildren(ExpressionVisitor)

Visit children expressions.

Declaration
protected override ItemIndexExpression VisitChildren(ExpressionVisitor visitor)
Parameters
Type Name Description
ExpressionVisitor visitor

Expression visitor.
Returns
Type Description
ItemIndexExpression

Potentially modified expression if one of children expressions is modified during visit.
Overrides

Extension Methods