Struct js_sys::Int8Array[][src]

#[repr(transparent)]
pub struct Int8Array { /* fields omitted */ }

Implementations

impl Int8Array[src]

pub fn new(constructor_arg: &JsValue) -> Int8Array[src]

The Int8Array() constructor creates a new array.

MDN documentation

impl Int8Array[src]

pub fn new_with_length(length: u32) -> Int8Array[src]

An Int8Array() which creates an array with an internal buffer large enough for length elements.

MDN documentation

impl Int8Array[src]

pub fn new_with_byte_offset(buffer: &JsValue, byte_offset: u32) -> Int8Array[src]

An Int8Array() which creates an array with the given buffer but is a view starting at byte_offset.

MDN documentation

impl Int8Array[src]

pub fn new_with_byte_offset_and_length(
    buffer: &JsValue,
    byte_offset: u32,
    length: u32
) -> Int8Array
[src]

An Int8Array() which creates an array with the given buffer but is a view starting at byte_offset for length elements.

MDN documentation

impl Int8Array[src]

pub fn fill(&self, value: i8, start: u32, end: u32) -> Int8Array[src]

The fill() method fills all the elements of an array from a start index to an end index with a static value. The end index is not included.

MDN documentation

impl Int8Array[src]

pub fn buffer(&self) -> ArrayBuffer[src]

The buffer accessor property represents the ArrayBuffer referenced by a TypedArray at construction time.

impl Int8Array[src]

pub fn subarray(&self, begin: u32, end: u32) -> Int8Array[src]

The subarray() method returns a new TypedArray on the same ArrayBuffer store and with the same element types as for this TypedArray object.

impl Int8Array[src]

pub fn slice(&self, begin: u32, end: u32) -> Int8Array[src]

The slice() method returns a shallow copy of a portion of a typed array into a new typed array object. This method has the same algorithm as Array.prototype.slice().

impl Int8Array[src]

pub fn for_each(&self, callback: &mut dyn FnMut(i8, u32, Int8Array))[src]

The forEach() method executes a provided function once per array element. This method has the same algorithm as Array.prototype.forEach(). TypedArray is one of the typed array types here.

impl Int8Array[src]

pub fn length(&self) -> u32[src]

The length accessor property represents the length (in elements) of a typed array.

impl Int8Array[src]

pub fn byte_length(&self) -> u32[src]

The byteLength accessor property represents the length (in bytes) of a typed array.

impl Int8Array[src]

pub fn byte_offset(&self) -> u32[src]

The byteOffset accessor property represents the offset (in bytes) of a typed array from the start of its ArrayBuffer.

impl Int8Array[src]

pub fn set(&self, src: &JsValue, offset: u32)[src]

The set() method stores multiple values in the typed array, reading input values from a specified array.

impl Int8Array[src]

pub fn get_index(&self, idx: u32) -> i8[src]

Gets the value at idx, equivalent to the javascript my_var = arr[idx].

impl Int8Array[src]

pub fn set_index(&self, idx: u32, value: i8)[src]

Sets the value at idx, equivalent to the javascript arr[idx] = value.

impl Int8Array[src]

pub unsafe fn view(rust: &[i8]) -> Int8Array[src]

Creates a JS typed array which is a view into wasm’s linear memory at the slice specified.

This function returns a new typed array which is a view into wasm’s memory. This view does not copy the underlying data.

Unsafety

Views into WebAssembly memory are only valid so long as the backing buffer isn’t resized in JS. Once this function is called any future calls to Box::new (or malloc of any form) may cause the returned value here to be invalidated. Use with caution!

Additionally the returned object can be safely mutated but the input slice isn’t guaranteed to be mutable.

Finally, the returned object is disconnected from the input slice’s lifetime, so there’s no guarantee that the data is read at the right time.

pub unsafe fn view_mut_raw(ptr: *mut i8, length: usize) -> Int8Array[src]

Creates a JS typed array which is a view into wasm’s linear memory at the specified pointer with specified length.

This function returns a new typed array which is a view into wasm’s memory. This view does not copy the underlying data.

Unsafety

Views into WebAssembly memory are only valid so long as the backing buffer isn’t resized in JS. Once this function is called any future calls to Box::new (or malloc of any form) may cause the returned value here to be invalidated. Use with caution!

Additionally the returned object can be safely mutated, the changes are guranteed to be reflected in the input array.

pub fn copy_to(&self, dst: &mut [i8])[src]

Copy the contents of this JS typed array into the destination Rust slice.

This function will efficiently copy the memory from a typed array into this wasm module’s own linear memory, initializing the memory destination provided.

Panics

This function will panic if this typed array’s length is different than the length of the provided dst array.

pub fn copy_from(&self, src: &[i8])[src]

Copy the contents of the source Rust slice into this JS typed array.

This function will efficiently copy the memory from within the wasm module’s own linear memory to this typed array.

Panics

This function will panic if this typed array’s length is different than the length of the provided src array.

pub fn to_vec(&self) -> Vec<i8>[src]

Efficiently copies the contents of this JS typed array into a new Vec.

Methods from Deref<Target = Object>

pub fn constructor(&self) -> Function[src]

The constructor property returns a reference to the Object constructor function that created the instance object.

MDN documentation

pub fn has_own_property(&self, property: &JsValue) -> bool[src]

The hasOwnProperty() method returns a boolean indicating whether the object has the specified property as its own property (as opposed to inheriting it).

MDN documentation

pub fn is_prototype_of(&self, value: &JsValue) -> bool[src]

The isPrototypeOf() method checks if an object exists in another object’s prototype chain.

MDN documentation

pub fn property_is_enumerable(&self, property: &JsValue) -> bool[src]

The propertyIsEnumerable() method returns a Boolean indicating whether the specified property is enumerable.

MDN documentation

pub fn to_locale_string(&self) -> JsString[src]

The toLocaleString() method returns a string representing the object. This method is meant to be overridden by derived objects for locale-specific purposes.

MDN documentation

pub fn to_string(&self) -> JsString[src]

The toString() method returns a string representing the object.

MDN documentation

pub fn value_of(&self) -> Object[src]

The valueOf() method returns the primitive value of the specified object.

MDN documentation

Methods from Deref<Target = JsValue>

pub const NULL: JsValue[src]

pub const UNDEFINED: JsValue[src]

pub const TRUE: JsValue[src]

pub const FALSE: JsValue[src]

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

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.

pub fn is_string(&self) -> bool[src]

Tests whether this JS value is a JS string.

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

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.

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

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.

pub fn is_null(&self) -> bool[src]

Tests whether this JS value is null

pub fn is_undefined(&self) -> bool[src]

Tests whether this JS value is undefined

pub fn is_symbol(&self) -> bool[src]

Tests whether the type of this JS value is symbol

pub fn is_object(&self) -> bool[src]

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

pub fn is_function(&self) -> bool[src]

Tests whether the type of this JS value is function.

pub fn is_truthy(&self) -> bool[src]

Tests whether the value is “truthy”.

pub fn is_falsy(&self) -> bool[src]

Tests whether the value is “falsy”.

Trait Implementations

impl AsRef<Int8Array> for Int8Array[src]

fn as_ref(&self) -> &Int8Array[src]

Performs the conversion.

impl AsRef<JsValue> for Int8Array[src]

fn as_ref(&self) -> &JsValue[src]

Performs the conversion.

impl AsRef<Object> for Int8Array[src]

fn as_ref(&self) -> &Object[src]

Performs the conversion.

impl Clone for Int8Array[src]

fn clone(&self) -> Int8Array[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for Int8Array[src]

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

Formats the value using the given formatter. Read more

impl Deref for Int8Array[src]

type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Object[src]

Dereferences the value.

impl<'a> From<&'a [i8]> for Int8Array[src]

fn from(slice: &'a [i8]) -> Int8Array[src]

Performs the conversion.

impl From<Int8Array> for JsValue[src]

fn from(obj: Int8Array) -> JsValue[src]

Performs the conversion.

impl From<Int8Array> for Object[src]

fn from(obj: Int8Array) -> Object[src]

Performs the conversion.

impl From<JsValue> for Int8Array[src]

fn from(obj: JsValue) -> Int8Array[src]

Performs the conversion.

impl FromWasmAbi for Int8Array[src]

type Abi = <JsValue as FromWasmAbi>::Abi

The wasm ABI type that this converts from when coming back out from the ABI boundary. Read more

unsafe fn from_abi(js: Self::Abi) -> Self[src]

Recover a Self from Self::Abi. Read more

impl IntoWasmAbi for Int8Array[src]

type Abi = <JsValue as IntoWasmAbi>::Abi

The wasm ABI type that this converts into when crossing the ABI boundary. Read more

fn into_abi(self) -> Self::Abi[src]

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary. Read more

impl<'a> IntoWasmAbi for &'a Int8Array[src]

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

The wasm ABI type that this converts into when crossing the ABI boundary. Read more

fn into_abi(self) -> Self::Abi[src]

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary. Read more

impl JsCast for Int8Array[src]

fn instanceof(val: &JsValue) -> bool[src]

Performs a dynamic instanceof check to see whether the JsValue provided is an instance of this type. Read more

fn unchecked_from_js(val: JsValue) -> Self[src]

Performs a zero-cost unchecked conversion from a JsValue into an instance of Self Read more

fn unchecked_from_js_ref(val: &JsValue) -> &Self[src]

Performs a zero-cost unchecked conversion from a &JsValue into an instance of &Self. Read more

fn has_type<T>(&self) -> bool where
    T: JsCast
[src]

Test whether this JS value has a type T. Read more

fn dyn_into<T>(self) -> Result<T, Self> where
    T: JsCast
[src]

Performs a dynamic cast (checked at runtime) of this value into the target type T. Read more

fn dyn_ref<T>(&self) -> Option<&T> where
    T: JsCast
[src]

Performs a dynamic cast (checked at runtime) of this value into the target type T. Read more

fn unchecked_into<T>(self) -> T where
    T: JsCast
[src]

Performs a zero-cost unchecked cast into the specified type. Read more

fn unchecked_ref<T>(&self) -> &T where
    T: JsCast
[src]

Performs a zero-cost unchecked cast into a reference to the specified type. Read more

fn is_instance_of<T>(&self) -> bool where
    T: JsCast
[src]

Test whether this JS value is an instance of the type T. Read more

fn is_type_of(val: &JsValue) -> bool[src]

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

impl OptionFromWasmAbi for Int8Array[src]

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

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi. Read more

impl OptionIntoWasmAbi for Int8Array[src]

fn none() -> Self::Abi[src]

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

impl<'a> OptionIntoWasmAbi for &'a Int8Array[src]

fn none() -> Self::Abi[src]

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

impl RefFromWasmAbi for Int8Array[src]

type Abi = <JsValue as RefFromWasmAbi>::Abi

The wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<Int8Array>

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. Read more

unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor[src]

Recover a Self::Anchor from Self::Abi. Read more

impl WasmDescribe for Int8Array[src]

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> ReturnWasmAbi for T where
    T: IntoWasmAbi
[src]

type Abi = <T as IntoWasmAbi>::Abi

Same as IntoWasmAbi::Abi

pub fn return_abi(self) -> <T as ReturnWasmAbi>::Abi[src]

Same as IntoWasmAbi::into_abi, except that it may throw and never return in the case of Err. Read more

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

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

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.