[−][src]Struct sauron::prelude::js_sys::Symbol
Implementations
impl Symbol
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pub fn has_instance() -> Symbol
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The Symbol.hasInstance
well-known symbol is used to determine
if a constructor object recognizes an object as its instance.
The instanceof
operator's behavior can be customized by this symbol.
impl Symbol
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pub fn is_concat_spreadable() -> Symbol
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The Symbol.isConcatSpreadable
well-known symbol is used to configure
if an object should be flattened to its array elements when using the
Array.prototype.concat()
method.
impl Symbol
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pub fn async_iterator() -> Symbol
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The Symbol.asyncIterator
well-known symbol specifies the default AsyncIterator for an object.
If this property is set on an object, it is an async iterable and can be used in a for await...of
loop.
impl Symbol
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pub fn iterator() -> Symbol
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The Symbol.iterator
well-known symbol specifies the default iterator
for an object. Used by for...of
.
impl Symbol
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pub fn match_() -> Symbol
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The Symbol.match
well-known symbol specifies the matching of a regular
expression against a string. This function is called by the
String.prototype.match()
method.
impl Symbol
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pub fn replace() -> Symbol
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The Symbol.replace
well-known symbol specifies the method that
replaces matched substrings of a string. This function is called by the
String.prototype.replace()
method.
For more information, see RegExp.prototype[@@replace]()
and
String.prototype.replace()
.
impl Symbol
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pub fn search() -> Symbol
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The Symbol.search
well-known symbol specifies the method that returns
the index within a string that matches the regular expression. This
function is called by the String.prototype.search()
method.
For more information, see RegExp.prototype[@@search]()
and
String.prototype.search()
.
impl Symbol
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pub fn species() -> Symbol
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The well-known symbol Symbol.species
specifies a function-valued
property that the constructor function uses to create derived objects.
impl Symbol
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pub fn split() -> Symbol
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The Symbol.split
well-known symbol specifies the method that splits a
string at the indices that match a regular expression. This function is
called by the String.prototype.split()
method.
For more information, see RegExp.prototype[@@split]()
and
String.prototype.split()
.
MDN documentation
impl Symbol
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pub fn to_primitive() -> Symbol
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The Symbol.toPrimitive
is a symbol that specifies a function valued
property that is called to convert an object to a corresponding
primitive value.
impl Symbol
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pub fn to_string_tag() -> Symbol
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The Symbol.toStringTag
well-known symbol is a string valued property
that is used in the creation of the default string description of an
object. It is accessed internally by the Object.prototype.toString()
method.
impl Symbol
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pub fn for_(key: &str) -> Symbol
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The Symbol.for(key)
method searches for existing symbols in a runtime-wide symbol registry with
the given key and returns it if found.
Otherwise a new symbol gets created in the global symbol registry with this key.
impl Symbol
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pub fn key_for(sym: &Symbol) -> JsValue
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The Symbol.keyFor(sym)
method retrieves a shared symbol key from the global symbol registry for the given symbol.
impl Symbol
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pub fn to_string(&self) -> JsString
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The toString()
method returns a string representing the specified Symbol object.
impl Symbol
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pub fn unscopables() -> Symbol
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The Symbol.unscopables
well-known symbol is used to specify an object
value of whose own and inherited property names are excluded from the
with environment bindings of the associated object.
impl Symbol
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pub fn value_of(&self) -> Symbol
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The valueOf()
method returns the primitive value of a Symbol object.
Methods from Deref<Target = JsValue>
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>,
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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
.
pub fn as_f64(&self) -> Option<f64>
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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
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Tests whether this JS value is a JS string.
pub fn as_string(&self) -> Option<String>
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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>
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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
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Tests whether this JS value is null
pub fn is_undefined(&self) -> bool
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Tests whether this JS value is undefined
pub fn is_symbol(&self) -> bool
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Tests whether the type of this JS value is symbol
pub fn is_object(&self) -> bool
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Tests whether typeof self == "object" && self !== null
.
pub fn is_function(&self) -> bool
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Tests whether the type of this JS value is function
.
pub fn is_truthy(&self) -> bool
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Tests whether the value is "truthy".
pub fn is_falsy(&self) -> bool
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Tests whether the value is "falsy".
Trait Implementations
impl AsRef<JsValue> for Symbol
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impl AsRef<Symbol> for Symbol
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impl Clone for Symbol
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impl Debug for Symbol
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impl Deref for Symbol
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impl From<JsValue> for Symbol
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impl From<Symbol> for JsValue
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impl FromWasmAbi for Symbol
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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. Read more
pub unsafe fn from_abi(js: <Symbol as FromWasmAbi>::Abi) -> Symbol
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impl<'a> IntoWasmAbi for &'a Symbol
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type Abi = <&'a JsValue as IntoWasmAbi>::Abi
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
pub fn into_abi(self) -> <&'a Symbol as IntoWasmAbi>::Abi
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impl IntoWasmAbi for Symbol
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type Abi = <JsValue as IntoWasmAbi>::Abi
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
pub fn into_abi(self) -> <Symbol as IntoWasmAbi>::Abi
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impl JsCast for Symbol
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pub fn instanceof(val: &JsValue) -> bool
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pub fn is_type_of(val: &JsValue) -> bool
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pub fn unchecked_from_js(val: JsValue) -> Symbol
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pub fn unchecked_from_js_ref(val: &JsValue) -> &Symbol
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pub fn has_type<T>(&self) -> bool where
T: JsCast,
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T: JsCast,
pub fn dyn_into<T>(self) -> Result<T, Self> where
T: JsCast,
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T: JsCast,
pub fn dyn_ref<T>(&self) -> Option<&T> where
T: JsCast,
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T: JsCast,
pub fn unchecked_into<T>(self) -> T where
T: JsCast,
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T: JsCast,
pub fn unchecked_ref<T>(&self) -> &TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
where
T: JsCast,
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
T: JsCast,
pub fn is_instance_of<T>(&self) -> bool where
T: JsCast,
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T: JsCast,
impl OptionFromWasmAbi for Symbol
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impl OptionIntoWasmAbi for Symbol
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pub fn none() -> <Symbol as IntoWasmAbi>::Abi
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impl<'a> OptionIntoWasmAbi for &'a Symbol
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pub fn none() -> <&'a Symbol as IntoWasmAbi>::Abi
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impl RefFromWasmAbi for Symbol
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type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<Symbol>
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
pub unsafe fn ref_from_abi(
js: <Symbol as RefFromWasmAbi>::Abi
) -> <Symbol as RefFromWasmAbi>::Anchor
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js: <Symbol as RefFromWasmAbi>::Abi
) -> <Symbol as RefFromWasmAbi>::Anchor
Auto Trait Implementations
impl RefUnwindSafe for Symbol
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impl !Send for Symbol
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impl !Sync for Symbol
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impl Unpin for Symbol
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impl UnwindSafe for Symbol
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Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow(&self) -> &TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ReturnWasmAbi for T where
T: IntoWasmAbi,
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T: IntoWasmAbi,
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi
pub fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
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>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,