Struct MLCTensorDescriptor

#[repr(C)]
pub struct MLCTensorDescriptor { /* private fields */ }

👎Deprecated

Available on crate feature MLCTensorDescriptor only.

The MLCTensorDescriptor specifies a tensor descriptor.

See also Apple’s documentation

Implementations

impl MLCTensorDescriptor

pub unsafe fn dataType(&self) -> MLCDataType

👎Deprecated

Available on crate feature MLCTypes only.

The tensor data type. The default is MLCDataTypeFloat32.

pub unsafe fn dimensionCount(&self) -> NSUInteger

👎Deprecated

The number of dimensions in the tensor

pub unsafe fn shape(&self) -> Retained<NSArray<NSNumber>>

👎Deprecated

The size in each dimension

pub unsafe fn stride(&self) -> Retained<NSArray<NSNumber>>

👎Deprecated

The stride in bytes in each dimension

pub unsafe fn tensorAllocationSizeInBytes(&self) -> NSUInteger

👎Deprecated

The allocation size in bytes for a tensor.

pub unsafe fn sequenceLengths(&self) -> Option<Retained<NSArray<NSNumber>>>

👎Deprecated

TODO

pub unsafe fn sortedSequences(&self) -> bool

👎Deprecated

Specifies whether the sequences are sorted or not.

pub unsafe fn batchSizePerSequenceStep( &self, ) -> Option<Retained<NSArray<NSNumber>>>

👎Deprecated

The batch size for each sequence

We populate this only when sequenceLengths is valid. The length of this array should be the maximum sequence length in sequenceLengths (i.e sequenceLengths[0]).

pub unsafe fn new() -> Retained<Self>

👎Deprecated

pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

👎Deprecated

pub unsafe fn maxTensorDimensions() -> NSUInteger

👎Deprecated

The maximum number of tensor dimensions supported

pub unsafe fn descriptorWithShape_dataType( shape: &NSArray<NSNumber>, data_type: MLCDataType, ) -> Option<Retained<Self>>

👎Deprecated

Available on crate feature MLCTypes only.

Create a MLCTensorDescriptor object

Parameter shape: The tensor shape

Parameter dataType: The tensor data type

Returns: A new MLCTensorDescriptor object or nil if failure.

pub unsafe fn descriptorWithShape_sequenceLengths_sortedSequences_dataType( shape: &NSArray<NSNumber>, sequence_lengths: &NSArray<NSNumber>, sorted_sequences: bool, data_type: MLCDataType, ) -> Option<Retained<Self>>

👎Deprecated

Available on crate feature MLCTypes only.

Create a MLCTensorDescriptor object

Parameter shape: The tensor shape

Parameter sequenceLengths: The sequence lengths in tensor

Parameter sortedSequences: A boolean to indicate whether sequences are sorted

Parameter dataType: The tensor data type

Returns: A new MLCTensorDescriptor object or nil if failure.

This method is provided as an easy to use API to create sequence tensors used by recurrent layers.

pub unsafe fn descriptorWithWidth_height_featureChannelCount_batchSize( width: NSUInteger, height: NSUInteger, feature_channels: NSUInteger, batch_size: NSUInteger, ) -> Option<Retained<Self>>

👎Deprecated

Create a MLCTensorDescriptor object

Parameter width: The tensor width

Parameter height: The tensor height

Parameter featureChannels: The number of feature channels

Parameter batchSize: The batch size

Returns: A new MLCTensorDescriptor object or nil if failure.

This method is provided as an easy to use API to create [NCHW] tensors used by convolutional layers.

pub unsafe fn descriptorWithWidth_height_featureChannelCount_batchSize_dataType( width: NSUInteger, height: NSUInteger, feature_channel_count: NSUInteger, batch_size: NSUInteger, data_type: MLCDataType, ) -> Option<Retained<Self>>

👎Deprecated

Available on crate feature MLCTypes only.

Create a MLCTensorDescriptor object

Parameter width: The tensor width

Parameter height: The tensor height

Parameter featureChannelCount: The number of feature channels

Parameter batchSize: The batch size

Parameter dataType: The tensor data type

Returns: A new MLCTensorDescriptor object or nil if failure.

This method is provided as an easy to use API to create [NCHW] tensors used by convolutional layers.

pub unsafe fn convolutionWeightsDescriptorWithWidth_height_inputFeatureChannelCount_outputFeatureChannelCount_dataType( width: NSUInteger, height: NSUInteger, input_feature_channel_count: NSUInteger, output_feature_channel_count: NSUInteger, data_type: MLCDataType, ) -> Option<Retained<Self>>

👎Deprecated

Available on crate feature MLCTypes only.

Create a MLCTensorDescriptor object

Parameter width: The tensor width

Parameter height: The tensor height

Parameter inputFeatureChannelCount: The number of input feature channels

Parameter outputFeatureChannelCount: The number of output feature channels

Parameter dataType: The tensor data type

Returns: A new MLCTensorDescriptor object or nil if failure.

This method is provided as an easy to use API to create a weight tensor.

pub unsafe fn convolutionWeightsDescriptorWithInputFeatureChannelCount_outputFeatureChannelCount_dataType( input_feature_channel_count: NSUInteger, output_feature_channel_count: NSUInteger, data_type: MLCDataType, ) -> Option<Retained<Self>>

👎Deprecated

Available on crate feature MLCTypes only.

Create a MLCTensorDescriptor object

Parameter inputFeatureChannelCount: The number of input feature channels

Parameter outputFeatureChannelCount: The number of output feature channels

Parameter dataType: The tensor data type

Returns: A new MLCTensorDescriptor object or nil if failure.

This method is provided as an easy to use API to create a weight tensor for a kernel of size 1.

pub unsafe fn convolutionBiasesDescriptorWithFeatureChannelCount_dataType( feature_channel_count: NSUInteger, data_type: MLCDataType, ) -> Option<Retained<Self>>

👎Deprecated

Available on crate feature MLCTypes only.

Create a MLCTensorDescriptor object

Parameter featureChannelCount: The number of input feature channels

Parameter dataType: The tensor data type

Returns: A new MLCTensorDescriptor object or nil if failure.

This method is provided as an easy to use API to create a bias tensor.

Methods from Deref<Target = NSObject>

pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>

pub fn class(&self) -> &'static AnyClass

Dynamically find the class of this object.

Panics

May panic if the object is invalid (which may be the case for objects returned from unavailable init/new methods).

Example

Check that an instance of NSObject has the precise class NSObject.

use objc2::ClassType;
use objc2::runtime::NSObject;

let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());

pub unsafe fn get_ivar<T>(&self, name: &str) -> &T

where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Use Ivar::load instead.

Safety

The object must have an instance variable with the given name, and it must be of type T.

See Ivar::load_ptr for details surrounding this.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: DowncastTarget,

Attempt to downcast the object to a class of type T.

This is the reference-variant. Use Retained::downcast if you want to convert a retained object to another type.

Mutable classes

Some classes have immutable and mutable variants, such as NSString and NSMutableString.

When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.

So using this method to convert a NSString to a NSMutableString, while not unsound, is generally frowned upon unless you created the string yourself, or the API explicitly documents the string to be mutable.

See Apple’s documentation on mutability and on isKindOfClass: for more details.

Generic classes

Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.

You can, however, safely downcast to generic collections where all the type-parameters are AnyObject.

Panics

This works internally by calling isKindOfClass:. That means that the object must have the instance method of that name, and an exception will be thrown (if CoreFoundation is linked) or the process will abort if that is not the case. In the vast majority of cases, you don’t need to worry about this, since both root objects NSObject and NSProxy implement this method.

Examples

Cast an NSString back and forth from NSObject.

use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};

let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();

Try (and fail) to cast an NSObject to an NSString.

use objc2_foundation::{NSObject, NSString};

let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());

Try to cast to an array of strings.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();

This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.

Downcast when processing each element instead.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);

for elem in arr {
    if let Some(data) = elem.downcast_ref::<NSString>() {
        // handle `data`
    }
}

Trait Implementations

impl AsRef<AnyObject> for MLCTensorDescriptor

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<MLCTensorDescriptor> for MLCTensorDescriptor

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSObject> for MLCTensorDescriptor

fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for MLCTensorDescriptor

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for MLCTensorDescriptor

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl ClassType for MLCTensorDescriptor

const NAME: &'static str = "MLCTensorDescriptor"

The name of the Objective-C class that this type represents.

type Super = NSObject

The superclass of this class.

type ThreadKind = <<MLCTensorDescriptor as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread.

fn class() -> &'static AnyClass

Get a reference to the Objective-C class that this type represents.

fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.

impl CopyingHelper for MLCTensorDescriptor

type Result = MLCTensorDescriptor

The immutable counterpart of the type, or Self if the type has no immutable counterpart.

impl Debug for MLCTensorDescriptor

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

Formats the value using the given formatter.

impl Deref for MLCTensorDescriptor

type Target = NSObject

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for MLCTensorDescriptor

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 Message for MLCTensorDescriptor

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl NSCopying for MLCTensorDescriptor

fn copy(&self) -> Retained<Self::Result>

where Self: Sized + Message + CopyingHelper,

Returns a new instance that’s a copy of the receiver.

unsafe fn copyWithZone(&self, zone: *mut NSZone) -> Retained<Self::Result>

where Self: Sized + Message + CopyingHelper,

Returns a new instance that’s a copy of the receiver.

impl NSObjectProtocol for MLCTensorDescriptor

fn isEqual(&self, other: Option<&AnyObject>) -> bool

where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object.

fn hash(&self) -> usize

where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure.

fn isKindOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of the class, or one of its subclasses.

fn is_kind_of<T>(&self) -> bool

where T: ClassType, Self: Sized + Message,

👎Deprecated: use isKindOfClass directly, or cast your objects with AnyObject::downcast_ref

Check if the object is an instance of the class type, or one of its subclasses.

fn isMemberOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses.

fn respondsToSelector(&self, aSelector: Sel) -> bool

where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector.

fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool

where Self: Sized + Message,

Check whether the object conforms to a given protocol.

fn description(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object.

fn debugDescription(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object to use when debugging.

fn isProxy(&self) -> bool

where Self: Sized + Message,

Check whether the receiver is a subclass of the NSProxy root class instead of the usual NSObject.

fn retainCount(&self) -> usize

where Self: Sized + Message,

The reference count of the object.

impl PartialEq for MLCTensorDescriptor

fn eq(&self, other: &Self) -> 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 RefEncode for MLCTensorDescriptor

const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF

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

impl DowncastTarget for MLCTensorDescriptor

impl Eq for MLCTensorDescriptor