Struct wasm_streams::readable::sys::ReadableStreamDefaultReadResult
source · [−]#[repr(transparent)]pub struct ReadableStreamDefaultReadResult { /* private fields */ }
Expand description
A result returned by ReadableStreamDefaultReader.read
.
Implementations
Methods from Deref<Target = JsValue>
pub const NULL: JsValue = JsValue{idx: JSIDX_NULL, _marker: marker::PhantomData,}
pub const UNDEFINED: JsValue = JsValue{idx: JSIDX_UNDEFINED, _marker: marker::PhantomData,}
pub const TRUE: JsValue = JsValue{idx: JSIDX_TRUE, _marker: marker::PhantomData,}
pub const FALSE: JsValue = JsValue{idx: JSIDX_FALSE, _marker: marker::PhantomData,}
sourcepub fn as_f64(&self) -> Option<f64>
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
.
sourcepub fn as_string(&self) -> Option<String>
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.
sourcepub fn as_bool(&self) -> Option<bool>
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
.
sourcepub fn is_undefined(&self) -> bool
pub fn is_undefined(&self) -> bool
Tests whether this JS value is undefined
sourcepub fn is_function(&self) -> bool
pub fn is_function(&self) -> bool
Tests whether the type of this JS value is function
.
Trait Implementations
sourceimpl AsRef<ReadableStreamDefaultReadResult> for ReadableStreamDefaultReadResult
impl AsRef<ReadableStreamDefaultReadResult> for ReadableStreamDefaultReadResult
sourcefn as_ref(&self) -> &ReadableStreamDefaultReadResult
fn as_ref(&self) -> &ReadableStreamDefaultReadResult
Converts this type into a shared reference of the (usually inferred) input type.
sourceimpl Clone for ReadableStreamDefaultReadResult
impl Clone for ReadableStreamDefaultReadResult
sourcefn clone(&self) -> ReadableStreamDefaultReadResult
fn clone(&self) -> ReadableStreamDefaultReadResult
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl From<JsValue> for ReadableStreamDefaultReadResult
impl From<JsValue> for ReadableStreamDefaultReadResult
sourcefn from(obj: JsValue) -> ReadableStreamDefaultReadResult
fn from(obj: JsValue) -> ReadableStreamDefaultReadResult
Converts to this type from the input type.
sourceimpl From<ReadableStreamDefaultReadResult> for JsValue
impl From<ReadableStreamDefaultReadResult> for JsValue
sourcefn from(obj: ReadableStreamDefaultReadResult) -> JsValue
fn from(obj: ReadableStreamDefaultReadResult) -> JsValue
Converts to this type from the input type.
sourceimpl<'a> IntoWasmAbi for &'a ReadableStreamDefaultReadResult
impl<'a> IntoWasmAbi for &'a ReadableStreamDefaultReadResult
sourceimpl JsCast for ReadableStreamDefaultReadResult
impl JsCast for ReadableStreamDefaultReadResult
sourcefn instanceof(val: &JsValue) -> bool
fn instanceof(val: &JsValue) -> bool
Performs a dynamic instanceof
check to see whether the JsValue
provided is an instance of this type. Read more
sourcefn unchecked_from_js(val: JsValue) -> Self
fn unchecked_from_js(val: JsValue) -> Self
Performs a zero-cost unchecked conversion from a JsValue
into an
instance of Self
Read more
sourcefn unchecked_from_js_ref(val: &JsValue) -> &Self
fn unchecked_from_js_ref(val: &JsValue) -> &Self
Performs a zero-cost unchecked conversion from a &JsValue
into an
instance of &Self
. Read more
sourcefn has_type<T>(&self) -> bool where
T: JsCast,
fn has_type<T>(&self) -> bool where
T: JsCast,
Test whether this JS value has a type T
. Read more
sourcefn dyn_into<T>(self) -> Result<T, Self> where
T: JsCast,
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
sourcefn dyn_ref<T>(&self) -> Option<&T> where
T: JsCast,
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
sourcefn unchecked_into<T>(self) -> T where
T: JsCast,
fn unchecked_into<T>(self) -> T where
T: JsCast,
Performs a zero-cost unchecked cast into the specified type. Read more
sourcefn unchecked_ref<T>(&self) -> &T where
T: JsCast,
fn unchecked_ref<T>(&self) -> &T where
T: JsCast,
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
sourcefn is_instance_of<T>(&self) -> bool where
T: JsCast,
fn is_instance_of<T>(&self) -> bool where
T: JsCast,
Test whether this JS value is an instance of the type T
. Read more
sourcefn is_type_of(val: &JsValue) -> bool
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
sourceimpl<'a> OptionIntoWasmAbi for &'a ReadableStreamDefaultReadResult
impl<'a> OptionIntoWasmAbi for &'a ReadableStreamDefaultReadResult
sourceimpl RefFromWasmAbi for ReadableStreamDefaultReadResult
impl RefFromWasmAbi for ReadableStreamDefaultReadResult
type Abi = <JsValue as RefFromWasmAbi>::Abi
type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<ReadableStreamDefaultReadResult>
type Anchor = ManuallyDrop<ReadableStreamDefaultReadResult>
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
sourceunsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor
unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor
Recover a Self::Anchor
from Self::Abi
. Read more
sourceimpl WasmDescribe for ReadableStreamDefaultReadResult
impl WasmDescribe for ReadableStreamDefaultReadResult
Auto Trait Implementations
impl RefUnwindSafe for ReadableStreamDefaultReadResult
impl !Send for ReadableStreamDefaultReadResult
impl !Sync for ReadableStreamDefaultReadResult
impl Unpin for ReadableStreamDefaultReadResult
impl UnwindSafe for ReadableStreamDefaultReadResult
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> ReturnWasmAbi for T where
T: IntoWasmAbi,
impl<T> ReturnWasmAbi for T where
T: IntoWasmAbi,
type Abi = <T as IntoWasmAbi>::Abi
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi
sourcefn return_abi(self) -> <T as ReturnWasmAbi>::Abi
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
. Read more
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more