RuntimeVariablesExpression Class
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An expression that provides runtime read/write permission for variables.
Inheritance Hierarchy
System.Object
System.Linq.Expressions.Expression
System.Linq.Expressions.RuntimeVariablesExpression
Namespace: System.Linq.Expressions
Assembly: System.Core (in System.Core.dll)
Syntax
'Declaration
Public NotInheritable Class RuntimeVariablesExpression _
Inherits Expression
public sealed class RuntimeVariablesExpression : Expression
The RuntimeVariablesExpression type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
.gif "Public property") |
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.) |
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NodeType | Returns the node type of this Expression. Extension nodes should return Extension when overriding this method. (Overrides Expression.NodeType.) |
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Type | Gets the static type of the expression that this Expression represents. (Overrides Expression.Type.) |
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Variables | The variables or parameters to which to provide runtime access. |
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Methods
| Name | Description | |
|---|---|---|
.gif "Protected method") |
Accept | Dispatches to the specific visit method for this node type. For example, MethodCallExpression calls the VisitMethodCall. (Inherited from Expression.) |
.gif "Public method") |
Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
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Finalize | Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.) |
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GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
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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.) |
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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.) |
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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.) |
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ToString | Returns a textual representation of the Expression. (Inherited from Expression.) |
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Update | Creates a new expression that is like this one, but using the supplied children. If all of the children are the same, it will return this expression. |
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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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Remarks
This type is necessary for implementing "eval" in dynamic languages. It evaluates to an instance of IList<T> at run time.
Version Information
Silverlight
Supported in: 5, 4
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.