INSPredicateValidating.VisitExpression(NSExpression, NSError) Method

Definition

Namespace:: Foundation

Assembly:: Microsoft.iOS.dll

Assembly:: Microsoft.MacCatalyst.dll

Assembly:: Microsoft.macOS.dll

Assembly:: Microsoft.tvOS.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Validates whether the specified expression is allowed to be evaluated.

[Foundation.Export("visitExpression:error:")]
[Foundation.OptionalMember]
[ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)]
public virtual bool VisitExpression(Foundation.NSExpression expression, out Foundation.NSError? error);

[<Foundation.Export("visitExpression:error:")>]
[<Foundation.OptionalMember>]
[<ObjCRuntime.BindingImpl(ObjCRuntime.BindingImplOptions.GeneratedCode | ObjCRuntime.BindingImplOptions.Optimizable)>]
abstract member VisitExpression : Foundation.NSExpression * NSError -> bool
override this.VisitExpression : Foundation.NSExpression * NSError -> bool

Parameters

expression: NSExpression

The NSExpression to validate.

error: NSError

When this method returns false, contains an NSError describing why the expression was rejected; otherwise, null.

Returns

Boolean

true if the expression is valid and allowed; otherwise, false.

Attributes: ExportAttribute OptionalMemberAttribute BindingImplAttribute

Applies to