tfjs_sys

Struct TensorBuffer

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pub struct TensorBuffer { /* private fields */ }
Expand description

A mutable object, similar to Tensor, that allows users to set values at locations before converting to an immutable Tensor.

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impl TensorBuffer

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pub fn set(&self, value: &JsValue, locs: &[usize])

Sets a value in the buffer at a given location.

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impl TensorBuffer

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pub fn to_tensor(&self) -> Tensor

Creates an immutable Tensor object from the buffer.

Methods from Deref<Target = JsValue>§

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pub const NULL: JsValue = _

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pub const UNDEFINED: JsValue = _

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pub const TRUE: JsValue = _

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pub const FALSE: JsValue = _

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pub fn into_serde<T>(&self) -> Result<T, Error>
where T: for<'a> Deserialize<'a>,

Invokes JSON.stringify on this value and then parses the resulting JSON into an arbitrary Rust value.

This function will first call JSON.stringify on the JsValue itself. The resulting string is then passed into Rust which then parses it as JSON into the resulting value.

Usage of this API requires activating the serde-serialize feature of the wasm-bindgen crate.

§Errors

Returns any error encountered when parsing the JSON into a T.

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pub fn as_f64(&self) -> Option<f64>

Returns the f64 value of this JS value if it’s an instance of a number.

If this JS value is not an instance of a number then this returns None.

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pub fn is_string(&self) -> bool

Tests whether this JS value is a JS string.

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pub fn as_string(&self) -> Option<String>

If this JS value is a string value, this function copies the JS string value into wasm linear memory, encoded as UTF-8, and returns it as a Rust String.

To avoid the copying and re-encoding, consider the JsString::try_from() function from js-sys instead.

If this JS value is not an instance of a string or if it’s not valid utf-8 then this returns None.

§UTF-16 vs UTF-8

JavaScript strings in general are encoded as UTF-16, but Rust strings are encoded as UTF-8. This can cause the Rust string to look a bit different than the JS string sometimes. For more details see the documentation about the str type which contains a few caveats about the encodings.

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pub fn as_bool(&self) -> Option<bool>

Returns the bool value of this JS value if it’s an instance of a boolean.

If this JS value is not an instance of a boolean then this returns None.

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pub fn is_null(&self) -> bool

Tests whether this JS value is null

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pub fn is_undefined(&self) -> bool

Tests whether this JS value is undefined

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pub fn is_symbol(&self) -> bool

Tests whether the type of this JS value is symbol

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pub fn is_object(&self) -> bool

Tests whether typeof self == "object" && self !== null.

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pub fn is_function(&self) -> bool

Tests whether the type of this JS value is function.

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pub fn is_truthy(&self) -> bool

Tests whether the value is “truthy”.

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pub fn is_falsy(&self) -> bool

Tests whether the value is “falsy”.

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impl AsRef<JsValue> for TensorBuffer

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fn as_ref(&self) -> &JsValue

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<TensorBuffer> for TensorBuffer

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fn as_ref(&self) -> &TensorBuffer

Converts this type into a shared reference of the (usually inferred) input type.
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impl Deref for TensorBuffer

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type Target = JsValue

The resulting type after dereferencing.
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fn deref(&self) -> &JsValue

Dereferences the value.
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impl From<JsValue> for TensorBuffer

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fn from(obj: JsValue) -> TensorBuffer

Converts to this type from the input type.
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impl From<TensorBuffer> for JsValue

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fn from(obj: TensorBuffer) -> JsValue

Converts to this type from the input type.
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impl FromWasmAbi for TensorBuffer

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type Abi = <JsValue as FromWasmAbi>::Abi

The wasm ABI type that this converts from when coming back out from the ABI boundary.
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unsafe fn from_abi(js: Self::Abi) -> Self

Recover a Self from Self::Abi. Read more
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impl<'a> IntoWasmAbi for &'a TensorBuffer

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type Abi = <&'a JsValue as IntoWasmAbi>::Abi

The wasm ABI type that this converts into when crossing the ABI boundary.
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fn into_abi(self) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.
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impl IntoWasmAbi for TensorBuffer

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type Abi = <JsValue as IntoWasmAbi>::Abi

The wasm ABI type that this converts into when crossing the ABI boundary.
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fn into_abi(self) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.
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impl JsCast for TensorBuffer

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fn instanceof(val: &JsValue) -> bool

Performs a dynamic instanceof check to see whether the JsValue provided is an instance of this type. Read more
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fn unchecked_from_js(val: JsValue) -> Self

Performs a zero-cost unchecked conversion from a JsValue into an instance of Self Read more
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fn unchecked_from_js_ref(val: &JsValue) -> &Self

Performs a zero-cost unchecked conversion from a &JsValue into an instance of &Self. Read more
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fn has_type<T>(&self) -> bool
where T: JsCast,

Test whether this JS value has a type T. Read more
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fn dyn_into<T>(self) -> Result<T, Self>
where T: JsCast,

Performs a dynamic cast (checked at runtime) of this value into the target type T. Read more
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fn dyn_ref<T>(&self) -> Option<&T>
where T: JsCast,

Performs a dynamic cast (checked at runtime) of this value into the target type T. Read more
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fn unchecked_into<T>(self) -> T
where T: JsCast,

Performs a zero-cost unchecked cast into the specified type. Read more
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fn unchecked_ref<T>(&self) -> &T
where T: JsCast,

Performs a zero-cost unchecked cast into a reference to the specified type. Read more
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fn is_instance_of<T>(&self) -> bool
where T: JsCast,

Test whether this JS value is an instance of the type T. Read more
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fn is_type_of(val: &JsValue) -> bool

Performs a dynamic check to see whether the JsValue provided is a value of this type. Read more
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impl OptionFromWasmAbi for TensorBuffer

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fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.
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impl<'a> OptionIntoWasmAbi for &'a TensorBuffer

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fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option. Read more
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impl OptionIntoWasmAbi for TensorBuffer

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fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option. Read more
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impl RefFromWasmAbi for TensorBuffer

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type Abi = <JsValue as RefFromWasmAbi>::Abi

The wasm ABI type references to Self are recovered from.
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type Anchor = ManuallyDrop<TensorBuffer>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don’t persist beyond one function call, and so that they remain anonymous.
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unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor

Recover a Self::Anchor from Self::Abi. Read more
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impl WasmDescribe for TensorBuffer

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ReturnWasmAbi for T
where T: IntoWasmAbi,

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type Abi = <T as IntoWasmAbi>::Abi

Same as IntoWasmAbi::Abi
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fn return_abi(self) -> <T as ReturnWasmAbi>::Abi

Same as IntoWasmAbi::into_abi, except that it may throw and never return in the case of Err.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.