Class ExpressionTypeAllowListScannerBase

Base class for expression visitors used to check uses of type members against a list of allowed types.

Inheritance

System.Object

ExpressionTypeAllowListScannerBase

ExpressionTypeAllowListScanner

Namespace: System.Linq.CompilerServices

Assembly: Nuqleon.Linq.CompilerServices.dll

Syntax

public abstract class ExpressionTypeAllowListScannerBase : ExpressionVisitor

Constructors

ExpressionTypeAllowListScannerBase()

Declaration

protected ExpressionTypeAllowListScannerBase()

Methods

Check(Type)

Checks whether the specified type is supported.

Declaration

protected abstract bool Check(Type type)

Parameters

Type	Name	Description
System.Type	type	Type to check.

Returns

Type	Description
System.Boolean	true if the type is supported; otherwise, false.

ResolveExpression<T>(T, Type, Func<T, Expression>)

Resolves an expression whose type was rejected by the checker.

Declaration

protected virtual Expression ResolveExpression<T>(T expression, Type type, Func<T, Expression> visit)
    where T : Expression

Parameters

Type	Name	Description
T	expression	Expression to resolve.
System.Type	type	Type that was rejected.
System.Func<T, System.Linq.Expressions.Expression>	visit	Function to continue the visit of the node.

Returns

Type	Description
System.Linq.Expressions.Expression	Resolved expression, or an exception. By default, the method throws a NotSupportedException.

Type Parameters

Name	Description
T	Type the expression to resolve.

Exceptions

Type	Condition
System.NotSupportedException	The specified expression was rejected.

Visit(Expression)

Checks whether the expression's type is on the list of allowed types.

Declaration

public override Expression Visit(Expression node)

Parameters

Type	Name	Description
System.Linq.Expressions.Expression	node	Node to check.

Returns

Type	Description
System.Linq.Expressions.Expression	The original node if the expression was accepted by the checker; otherwise, a rewritten result or an exception.