#[repr(transparent)]
pub struct Iterator { /* fields omitted */ }
Any object that conforms to the JS iterator protocol. For example,
something returned by myArray[Symbol.iterator]()
.
MDN documentation
The next method always has to return an object with appropriate
properties including done and value. If a non-object value gets returned
(such as false or undefined), a TypeError ("iterator.next() returned a
non-object value") will be thrown.
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
.
Tests whether this JS value is a JS 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
.
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
.
Tests whether this JS value is null
Tests whether this JS value is undefined
Tests whether the type of this JS value is symbol
Tests whether typeof self == "object" && self !== null
.
Tests whether the type of this JS value is function
.
Performs copy-assignment from source
. Read more
The type of the elements being iterated over.
Which kind of iterator are we turning this into?
Formats the value using the given formatter. Read more
type Abi = <JsValue as IntoWasmAbi>::Abi
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
Convert self
into Self::Abi
so that it can be sent across the wasm ABI boundary. Read more
type Abi = <&'a JsValue as IntoWasmAbi>::Abi
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
Convert self
into Self::Abi
so that it can be sent across the wasm ABI boundary. Read more
Returns an ABI instance indicating "none", which JS will interpret as the None
branch of this option. Read more
Returns an ABI instance indicating "none", which JS will interpret as the None
branch of this option. Read more
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
type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<Iterator>
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
Recover a Self::Anchor
from Self::Abi
. Read more
Performs a dynamic instanceof
check to see whether the JsValue
provided is an instance of this type. Read more
Performs a zero-cost unchecked conversion from a JsValue
into an instance of Self
Read more
Performs a zero-cost unchecked conversion from a &JsValue
into an instance of &Self
. Read more
Test whether this JS value is an instance of the type T
. Read more
Performs a dynamic cast (checked at runtime) of this value into the target type T
. Read more
Performs a dynamic cast (checked at runtime) of this value into the target type T
. Read more
Performs a zero-cost unchecked cast into the specified type. Read more
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
type Owned = T
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
type Item = <I as Iterator>::Item
The type of the elements being iterated over.
type IntoIter = I
Which kind of iterator are we turning this into?
type Error = !
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Immutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
type Error = <U as TryFrom<T>>::Error
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Mutably borrows from an owned value. Read more
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::into_abi
, except that it may throw and never return in the case of Err
. Read more