Class ToQueryTreeConverter

Base class for conversions from a source domain to the query expression tree model.

Inheritance

System.Object

ToQueryTreeConverter

MethodCallBasedOperatorToQueryTreeConverter

Namespace: System.Linq.CompilerServices.Optimizers

Assembly: Nuqleon.Linq.CompilerServices.Optimizers.dll

Syntax

public abstract class ToQueryTreeConverter : ExpressionVisitor

Constructors

ToQueryTreeConverter()

Creates the converter to the query expression tree model.

Declaration

protected ToQueryTreeConverter()

Methods

Convert(Expression)

Converts the expression to the query expression tree model.

Declaration

public QueryTree Convert(Expression expression)

Parameters

Type	Name	Description
System.Linq.Expressions.Expression	expression	The expression to convert.

Returns

Type	Description
QueryTree	The converted expression.

ConvertToMonadMember(Type, QueryTree)

Converts the query tree to a monad member by wrapping it if needed.

Declaration

protected static MonadMember ConvertToMonadMember(Type monadElementType, QueryTree queryTree)

Parameters

Type	Name	Description
System.Type	monadElementType	The desired element type of the resulting monad.
QueryTree	queryTree	The query tree to convert.

Returns

Type	Description
MonadMember	The query tree as a monad member.

CreateKnownOperator(QueryTree, Type)

Creates a handle for the query tree node which is to be used to replace the node being visited.

Declaration

protected ParameterExpression CreateKnownOperator(QueryTree queryTree, Type type)

Parameters

Type	Name	Description
QueryTree	queryTree	The query tree representing the current node.
System.Type	type	The type of the current node.

Returns

Type	Description
System.Linq.Expressions.ParameterExpression	A handle which is associated with the query tree replacing the current node.

VisitFromKnownOperator(Expression)

Visits the expression from an expression node which is going to be replaced by a query expression tree node. If visiting the expression doesn't return a handle to a query tree, then it is wrapped in a lambda abstraction.

Declaration

protected QueryTree VisitFromKnownOperator(Expression expression)

Parameters

Type	Name	Description
System.Linq.Expressions.Expression	expression	The expression to visit.

Returns

Type	Description
QueryTree	The result of visiting the expression. If it is a handle to a query tree, then the query tree is returned; else a lambda abstraction is returned.