[−][src]Struct sauron::prelude::js_sys::Number
Implementations
impl Number
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pub const EPSILON: f64
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The smallest interval between two representable numbers.
pub const MAX_SAFE_INTEGER: f64
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The maximum safe integer in JavaScript (2^53 - 1).
pub const MAX_VALUE: f64
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The largest positive representable number.
pub const MIN_SAFE_INTEGER: f64
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The minimum safe integer in JavaScript (-(2^53 - 1)).
pub const MIN_VALUE: f64
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The smallest positive representable number—that is, the positive number closest to zero (without actually being zero).
pub const NAN: f64
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Special "Not a Number" value.
pub const NEGATIVE_INFINITY: f64
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Special value representing negative infinity. Returned on overflow.
pub const POSITIVE_INFINITY: f64
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Special value representing infinity. Returned on overflow.
impl Number
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pub fn is_finite(value: &JsValue) -> bool
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The Number.isFinite()
method determines whether the passed value is a finite number.
impl Number
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pub fn is_integer(value: &JsValue) -> bool
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The Number.isInteger()
method determines whether the passed value is an integer.
impl Number
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pub fn is_nan(value: &JsValue) -> bool
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The Number.isNaN()
method determines whether the passed value is NaN
and its type is Number.
It is a more robust version of the original, global isNaN().
impl Number
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pub fn is_safe_integer(value: &JsValue) -> bool
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The Number.isSafeInteger()
method determines whether the provided value is a number
that is a safe integer.
impl Number
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pub fn new(value: &JsValue) -> Number
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recommended to use Number::from
instead
The Number
JavaScript object is a wrapper object allowing
you to work with numerical values. A Number
object is
created using the Number()
constructor.
impl Number
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pub fn parse_int(text: &str, radix: u8) -> f64
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The Number.parseInt()
method parses a string argument and returns an
integer of the specified radix or base.
impl Number
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pub fn parse_float(text: &str) -> f64
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The Number.parseFloat()
method parses a string argument and returns a
floating point number.
impl Number
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pub fn to_locale_string(&self, locale: &str) -> JsString
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The toLocaleString()
method returns a string with a language sensitive
representation of this number.
impl Number
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pub fn to_precision(&self, precision: u8) -> Result<JsString, JsValue>
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The toPrecision()
method returns a string representing the Number
object to the specified precision.
impl Number
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pub fn to_fixed(&self, digits: u8) -> Result<JsString, JsValue>
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The toFixed()
method returns a string representing the Number
object using fixed-point notation.
impl Number
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pub fn to_exponential(&self, fraction_digits: u8) -> Result<JsString, JsValue>
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The toExponential()
method returns a string representing the Number
object in exponential notation.
impl Number
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pub fn to_string(&self, radix: u8) -> Result<JsString, JsValue>
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The toString()
method returns a string representing the
specified Number object.
impl Number
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pub fn value_of(&self) -> f64
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The valueOf()
method returns the wrapped primitive value of
a Number object.
Methods from Deref<Target = Object>
pub fn constructor(&self) -> Function
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The constructor property returns a reference to the Object
constructor
function that created the instance object.
pub fn has_own_property(&self, property: &JsValue) -> bool
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The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
pub fn is_prototype_of(&self, value: &JsValue) -> bool
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The isPrototypeOf()
method checks if an object exists in another
object's prototype chain.
pub fn property_is_enumerable(&self, property: &JsValue) -> bool
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The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
pub fn to_locale_string(&self) -> JsString
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The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
pub fn to_string(&self) -> JsString
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The toString()
method returns a string representing the object.
pub fn value_of(&self) -> Object
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The valueOf()
method returns the primitive value of the
specified 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 Number
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impl AsRef<Number> for Number
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impl AsRef<Object> for Number
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impl Clone for Number
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impl Debug for Number
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impl Deref for Number
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impl From<JsValue> for Number
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impl From<Number> for f64
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impl From<Number> for JsValue
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impl From<Number> for Object
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impl From<f32> for Number
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impl From<f64> for Number
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impl From<i16> for Number
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impl From<i32> for Number
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impl From<i8> for Number
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impl From<u16> for Number
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impl From<u32> for Number
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impl From<u8> for Number
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impl FromWasmAbi for Number
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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: <Number as FromWasmAbi>::Abi) -> Number
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impl<'a> IntoWasmAbi for &'a Number
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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 Number as IntoWasmAbi>::Abi
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impl IntoWasmAbi for Number
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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) -> <Number as IntoWasmAbi>::Abi
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impl JsCast for Number
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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) -> Number
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pub fn unchecked_from_js_ref(val: &JsValue) -> &Number
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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 Number
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impl<'a> OptionIntoWasmAbi for &'a Number
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pub fn none() -> <&'a Number as IntoWasmAbi>::Abi
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impl OptionIntoWasmAbi for Number
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pub fn none() -> <Number as IntoWasmAbi>::Abi
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impl PartialEq<f32> for Number
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pub fn eq(&self, other: &f32) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
impl PartialEq<f64> for Number
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pub fn eq(&self, other: &f64) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl PartialEq<i16> for Number
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pub fn eq(&self, other: &i16) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl PartialEq<i32> for Number
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pub fn eq(&self, other: &i32) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl PartialEq<i8> for Number
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impl PartialEq<u16> for Number
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pub fn eq(&self, other: &u16) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl PartialEq<u32> for Number
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pub fn eq(&self, other: &u32) -> bool
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#[must_use]pub fn ne(&self, other: &Rhs) -> bool
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impl PartialEq<u8> for Number
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impl RefFromWasmAbi for Number
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type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<Number>
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: <Number as RefFromWasmAbi>::Abi
) -> <Number as RefFromWasmAbi>::Anchor
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js: <Number as RefFromWasmAbi>::Abi
) -> <Number as RefFromWasmAbi>::Anchor
Auto Trait Implementations
impl RefUnwindSafe for Number
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impl !Send for Number
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impl !Sync for Number
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impl Unpin for Number
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impl UnwindSafe for Number
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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>,