Struct SecTransformMetaAttributeType

#[repr(transparent)]
pub struct SecTransformMetaAttributeType(pub CFIndex);

👎Deprecated: SecTransform is no longer supported

Available on crate feature SecCustomTransform only.

Within a transform, each of its attributes is a collection of “metadata attributes”, of which name and current value are two. The value is directly visible from outside; the other metadata attributes direct the behavior of the transform and its function within its group. Each attribute may be tailored by setting its metadata.

The actual value of the attribute. The attribute value has a default value of NULL.

The name of the attribute. Attribute name is read only and may not be used with the SecTransformSetAttributeBlock block.

A direct reference to an attribute’s value. This reference allows for direct access to an attribute without having to look up the attribute by name. If a transform commonly uses an attribute, using a reference speeds up the use of that attribute. Attribute references are not visible or valid from outside of the particular transform instance.

Specifies if an attribute must have a non NULL value set or have an incoming connection before the transform starts to execute. This metadata has a default value of true for the input attribute, but false for all other attributes.

Specifies if an attribute must have an outbound connection. This metadata has a default value of true for the output attribute but is false for all other attributes.

Determines if the AttributeSetNotification notification or the ProcessData blocks are deferred until SecExecuteTransform is called. This metadata value has a default value of true for the input attribute but is false for all other attributes.

Specifies if the attribute should expect a series of values ending with a NULL to specify the end of the data stream. This metadata has a default value of true for the input and output attributes, but is false for all other attributes.

A Transform group is a directed graph which is typically acyclic. Some transforms need to work with cycles. For example, a transform that emits a header and trailer around the data of another transform must create a cycle. If this metadata set to true, no error is returned if a cycle is detected for this attribute.

Specifies if this attribute should be written out when creating the external representation of this transform. This metadata has a default value of true.

This metadata value is true if the attribute has an outbound connection. This metadata is read only.

This metadata value is true if the attribute has an inbound connection. This metadata is read only.

See also Apple’s documentation

Tuple Fields

0: CFIndex

👎Deprecated: SecTransform is no longer supported

Implementations

impl SecTransformMetaAttributeType

pub const Value: Self

👎Deprecated: SecTransform is no longer supported

pub const Name: Self

👎Deprecated: SecTransform is no longer supported

pub const Ref: Self

👎Deprecated: SecTransform is no longer supported

pub const Required: Self

👎Deprecated: SecTransform is no longer supported

pub const RequiresOutboundConnection: Self

👎Deprecated: SecTransform is no longer supported

pub const Deferred: Self

👎Deprecated: SecTransform is no longer supported

pub const Stream: Self

👎Deprecated: SecTransform is no longer supported

pub const CanCycle: Self

👎Deprecated: SecTransform is no longer supported

pub const Externalize: Self

👎Deprecated: SecTransform is no longer supported

pub const HasOutboundConnections: Self

👎Deprecated: SecTransform is no longer supported

pub const HasInboundConnection: Self

👎Deprecated: SecTransform is no longer supported

Trait Implementations

impl Clone for SecTransformMetaAttributeType

fn clone(&self) -> SecTransformMetaAttributeType

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SecTransformMetaAttributeType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Encode for SecTransformMetaAttributeType

Available on crate feature objc2 only.

const ENCODING: Encoding = CFIndex::ENCODING

The Objective-C type-encoding for this type.

impl Hash for SecTransformMetaAttributeType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SecTransformMetaAttributeType

fn cmp(&self, other: &SecTransformMetaAttributeType) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SecTransformMetaAttributeType

fn eq(&self, other: &SecTransformMetaAttributeType) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for SecTransformMetaAttributeType

fn partial_cmp(&self, other: &SecTransformMetaAttributeType) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl RefEncode for SecTransformMetaAttributeType

Available on crate feature objc2 only.

const ENCODING_REF: Encoding

The Objective-C type-encoding for a reference of this type.

impl Copy for SecTransformMetaAttributeType

impl Eq for SecTransformMetaAttributeType

impl StructuralPartialEq for SecTransformMetaAttributeType