CommonExpression Class

The class which is placed between Expression and our own expression classes. This way we can introduce a Handle routine to simulare multiple-dynamic dispatch ala the visitor pattern, as the normal Expression object doesn't offer that feature and we're otherwise stuck with large bug switch / case statements. (still a switch/case is needed for .NET's Expression classes)

Inheritance Hierarchy

SystemObject
  System.Linq.ExpressionsExpression
    SD.LLBLGen.Pro.LinqSupportClasses.ExpressionClassesCommonExpression
      More...

Namespace: SD.LLBLGen.Pro.LinqSupportClasses.ExpressionClasses
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.4.0.0 (5.4.0)

Syntax

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public abstract class CommonExpression : Expression

Public MustInherit Class CommonExpression
	Inherits Expression

The CommonExpression type exposes the following members.

Constructors

	Name	Description
	CommonExpression	Initializes a new instance of the CommonExpression class.

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Properties

	Name	Description
	CanReduce	Indicates that the node can be reduced to a simpler node. If this returns true, Reduce() can be called to produce the reduced form. (Inherited from Expression.)
	NodeType	Gets the node type of this Expression. (Overrides ExpressionNodeType.)
	Type	Gets the static type of the expression that this Expression represents. (Overrides ExpressionType.)

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Methods

	Name	Description
	Accept	Dispatches to the specific visit method for this node type. For example, MethodCallExpression calls the VisitMethodCall(MethodCallExpression). (Inherited from Expression.)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	Handle	Handles this instance using the specified handler.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	Reduce	Reduces this node to a simpler expression. If CanReduce returns true, this should return a valid expression. This method can return another node which itself must be reduced. (Inherited from Expression.)
	ReduceAndCheck	Reduces this node to a simpler expression. If CanReduce returns true, this should return a valid expression. This method can return another node which itself must be reduced. (Inherited from Expression.)
	ReduceExtensions	Reduces the expression to a known node type (that is not an Extension node) or just returns the expression if it is already a known type. (Inherited from Expression.)
	ToString	Returns a textual representation of the Expression. (Inherited from Expression.)
	VisitChildren	Reduces the node and then calls the visitor delegate on the reduced expression. The method throws an exception if the node is not reducible. (Inherited from Expression.)

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Reference

SD.LLBLGen.Pro.LinqSupportClasses.ExpressionClasses Namespace

Inheritance Hierarchy