#[repr(C)]pub struct MLCMultiheadAttentionDescriptor { /* private fields */ }
MLCMultiheadAttentionDescriptor
only.Expand description
The MLCMultiheadAttentionDescriptor specifies a Multi-Head Attention descriptor
See also Appleโs documentation
Implementationsยง
Sourceยงimpl MLCMultiheadAttentionDescriptor
impl MLCMultiheadAttentionDescriptor
pub unsafe fn new() -> Retained<Self>
pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>
Sourcepub unsafe fn modelDimension(&self) -> NSUInteger
๐Deprecated
pub unsafe fn modelDimension(&self) -> NSUInteger
model or embedding dimension
Sourcepub unsafe fn keyDimension(&self) -> NSUInteger
๐Deprecated
pub unsafe fn keyDimension(&self) -> NSUInteger
total dimension of key space, Default = modelDimension
Sourcepub unsafe fn valueDimension(&self) -> NSUInteger
๐Deprecated
pub unsafe fn valueDimension(&self) -> NSUInteger
total dimension of value space, Default = modelDimension
Sourcepub unsafe fn headCount(&self) -> NSUInteger
๐Deprecated
pub unsafe fn headCount(&self) -> NSUInteger
number of parallel attention heads
Sourcepub unsafe fn dropout(&self) -> c_float
๐Deprecated
pub unsafe fn dropout(&self) -> c_float
a droupout layer applied to the output projection weights. Default = 0.0
Sourcepub unsafe fn hasBiases(&self) -> bool
๐Deprecated
pub unsafe fn hasBiases(&self) -> bool
if true, bias is used for query/key/value/output projections. Default = true
Sourcepub unsafe fn hasAttentionBiases(&self) -> bool
๐Deprecated
pub unsafe fn hasAttentionBiases(&self) -> bool
if true, an array of biases is added to key and value respectively. Default = false
Sourcepub unsafe fn addsZeroAttention(&self) -> bool
๐Deprecated
pub unsafe fn addsZeroAttention(&self) -> bool
if true, a row of zeroes is added to projected key and value. Default = false
Sourcepub unsafe fn descriptorWithModelDimension_keyDimension_valueDimension_headCount_dropout_hasBiases_hasAttentionBiases_addsZeroAttention(
model_dimension: NSUInteger,
key_dimension: NSUInteger,
value_dimension: NSUInteger,
head_count: NSUInteger,
dropout: c_float,
has_biases: bool,
has_attention_biases: bool,
adds_zero_attention: bool,
) -> Option<Retained<Self>>
๐Deprecated
pub unsafe fn descriptorWithModelDimension_keyDimension_valueDimension_headCount_dropout_hasBiases_hasAttentionBiases_addsZeroAttention( model_dimension: NSUInteger, key_dimension: NSUInteger, value_dimension: NSUInteger, head_count: NSUInteger, dropout: c_float, has_biases: bool, has_attention_biases: bool, adds_zero_attention: bool, ) -> Option<Retained<Self>>
A multi-head attention layer descriptor
Parameter modelDimension
: total dimension of model space
Parameter keyDimension
: total dimension of key space. Default = modelDimension
Parameter valueDimension
: total dimension of value space. Default = modelDimension
Parameter headCount
: number of parallel attention heads
Parameter dropout
: optional, a dropout layer applied to the output projection weights. Default = 0.0f
Parameter hasBiases
: if true, bias will be added to query/key/value/output projections. Default = YES
Parameter hasAttentionBiases
: if true, an array of biases is added to key and value respectively. Default = NO
Parameter addsZeroAttention
: if true, a row of zeroes is added to projected key and value. Default = NO
Returns: A new MultiheadAttention layer descriptor
Sourcepub unsafe fn descriptorWithModelDimension_headCount(
model_dimension: NSUInteger,
head_count: NSUInteger,
) -> Retained<Self>
๐Deprecated
pub unsafe fn descriptorWithModelDimension_headCount( model_dimension: NSUInteger, head_count: NSUInteger, ) -> Retained<Self>
A multi-head attention layer descriptor
Parameter modelDimension
: total dimension of model space
Parameter headCount
: number of parallel attention heads
Returns: A valid MultiheadAttention layer descriptor
Methods from Deref<Target = NSObject>ยง
Sourcepub fn doesNotRecognizeSelector(&self, sel: Sel) -> !
pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !
Handle messages the object doesnโt recognize.
See Appleโs documentation for details.
Methods from Deref<Target = AnyObject>ยง
Sourcepub fn class(&self) -> &'static AnyClass
pub fn class(&self) -> &'static AnyClass
Dynamically find the class of this object.
ยงPanics
May panic if the object is invalid (which may be the case for objects
returned from unavailable init
/new
methods).
ยงExample
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());
Sourcepub unsafe fn get_ivar<T>(&self, name: &str) -> &Twhere
T: Encode,
๐Deprecated: this is difficult to use correctly, use Ivar::load
instead.
pub unsafe fn get_ivar<T>(&self, name: &str) -> &Twhere
T: Encode,
Ivar::load
instead.Use Ivar::load
instead.
ยงSafety
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.
Sourcepub fn downcast_ref<T>(&self) -> Option<&T>where
T: DowncastTarget,
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.
ยงMutable 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 โunder the hoodโ.
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 Appleโs documentation on mutability and on
isKindOfClass:
for more details.
ยงGeneric classes
Objective-C generics are called โlightweight genericsโ, and thatโs because they arenโt 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
.
ยงPanics
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 donโt need
to worry about this, since both root objects NSObject
and
NSProxy
implement this method.
ยงExamples
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 Implementationsยง
Sourceยงimpl ClassType for MLCMultiheadAttentionDescriptor
impl ClassType for MLCMultiheadAttentionDescriptor
Sourceยงconst NAME: &'static str = "MLCMultiheadAttentionDescriptor"
const NAME: &'static str = "MLCMultiheadAttentionDescriptor"
Sourceยงtype ThreadKind = <<MLCMultiheadAttentionDescriptor as ClassType>::Super as ClassType>::ThreadKind
type ThreadKind = <<MLCMultiheadAttentionDescriptor as ClassType>::Super as ClassType>::ThreadKind
Sourceยงimpl CopyingHelper for MLCMultiheadAttentionDescriptor
impl CopyingHelper for MLCMultiheadAttentionDescriptor
Sourceยงtype Result = MLCMultiheadAttentionDescriptor
type Result = MLCMultiheadAttentionDescriptor
Self
if the type has no
immutable counterpart. Read moreSourceยงimpl NSCopying for MLCMultiheadAttentionDescriptor
impl NSCopying for MLCMultiheadAttentionDescriptor
Sourceยงimpl NSObjectProtocol for MLCMultiheadAttentionDescriptor
impl NSObjectProtocol for MLCMultiheadAttentionDescriptor
Sourceยงfn isEqual(&self, other: Option<&AnyObject>) -> bool
fn isEqual(&self, other: Option<&AnyObject>) -> bool
Sourceยงfn hash(&self) -> usize
fn hash(&self) -> usize
Sourceยงfn isKindOfClass(&self, cls: &AnyClass) -> bool
fn isKindOfClass(&self, cls: &AnyClass) -> bool
Sourceยงfn is_kind_of<T>(&self) -> bool
fn is_kind_of<T>(&self) -> bool
isKindOfClass
directly, or cast your objects with AnyObject::downcast_ref