Class SelectOperator

A representation of a select query expression operator.

Inheritance

System.Object

QueryTree

MonadMember

QueryOperator

SelectOperator

Inherited Members

QueryOperator.Reduce()

QueryOperator.QueryNodeType

QueryOperator.QueryExpressionFactory

MonadMember.ElementType

Namespace: System.Linq.CompilerServices.Optimizers

Assembly: Nuqleon.Linq.CompilerServices.Optimizers.dll

Syntax

public class SelectOperator : QueryOperator

Constructors

SelectOperator(Type, Type, MonadMember, QueryTree)

Creates a representation of a select query expression operator.

Declaration

protected SelectOperator(Type elementType, Type inputElementType, MonadMember source, QueryTree selector)

Parameters

Type	Name	Description
System.Type	elementType	The element type of the resulting monad.
System.Type	inputElementType	The input type of the source monad.
MonadMember	source	The source to map from.
QueryTree	selector	The projection function used to map from the source.

Properties

InputElementType

The element type of the source monad.

Declaration

public Type InputElementType { get; }

Property Value

Type	Description
System.Type

NodeType

Gets the OperatorType of the QueryOperator.

Declaration

public override OperatorType NodeType { get; }

Property Value

Type	Description
OperatorType

Overrides

QueryOperator.NodeType

Selector

The projection function used to obtain elements from the source monad.

Declaration

public QueryTree Selector { get; }

Property Value

Type	Description
QueryTree

Source

The source on which this operator acts.

Declaration

public MonadMember Source { get; }

Property Value

Type	Description
MonadMember

Methods

Accept<TQueryTree, TMonadMember, TQueryOperator>(QueryVisitor<TQueryTree, TMonadMember, TQueryOperator>)

Accepts the query expression tree node in the specified visitor.

Declaration

protected override TQueryTree Accept<TQueryTree, TMonadMember, TQueryOperator>(QueryVisitor<TQueryTree, TMonadMember, TQueryOperator> visitor)
    where TMonadMember : TQueryTree where TQueryOperator : TMonadMember

Parameters

Type	Name	Description
QueryVisitor<TQueryTree, TMonadMember, TQueryOperator>	visitor	Visitor to process the current query expression tree node.

Returns

Type	Description
TQueryTree	Result of visiting the node.

Type Parameters

Name	Description
TQueryTree	Target type for query expressions.
TMonadMember	Target type for monad member query expressions. This type has to derive from TQueryTree.
TQueryOperator	Target type for query operator query expressions. This type has to derive from TMonadMember.

Overrides

System.Linq.CompilerServices.Optimizers.QueryTree.Accept<TQueryTree, TMonadMember, TQueryOperator>(System.Linq.CompilerServices.Optimizers.QueryVisitor<TQueryTree, TMonadMember, TQueryOperator>)

Update(MonadMember, QueryTree)

Creates a select operator query expression that is like this one, but using the supplied children. If all of the children are the same, it will return this expression.

Declaration

public SelectOperator Update(MonadMember source, QueryTree selector)

Parameters

Type	Name	Description
MonadMember	source	The Source child node of the result.
QueryTree	selector	The Selector child node of the result.

Returns

Type	Description
SelectOperator	This query expression if no children are changed or an expression with the updated children.