#[repr(transparent)]pub struct Number { /* private fields */ }
Expand description
Implementations§
source§impl Number
impl Number
source§impl Number
impl Number
sourcepub fn is_integer(value: &JsValue) -> bool
pub fn is_integer(value: &JsValue) -> bool
The Number.isInteger()
method determines whether the passed value is an integer.
source§impl Number
impl Number
source§impl Number
impl Number
sourcepub fn is_safe_integer(value: &JsValue) -> bool
pub fn is_safe_integer(value: &JsValue) -> bool
The Number.isSafeInteger()
method determines whether the provided value is a number
that is a safe integer.
source§impl Number
impl Number
source§impl Number
impl Number
sourcepub fn parse_float(text: &str) -> f64
pub fn parse_float(text: &str) -> f64
The Number.parseFloat()
method parses a string argument and returns a
floating point number.
source§impl Number
impl Number
sourcepub fn to_locale_string(&self, locale: &str) -> JsString
pub fn to_locale_string(&self, locale: &str) -> JsString
The toLocaleString()
method returns a string with a language sensitive
representation of this number.
source§impl Number
impl Number
source§impl Number
impl Number
source§impl Number
impl Number
source§impl Number
impl Number
sourcepub const EPSILON: f64 = 2.2204460492503131E-16f64
pub const EPSILON: f64 = 2.2204460492503131E-16f64
The smallest interval between two representable numbers.
sourcepub const MAX_SAFE_INTEGER: f64 = 9007199254740991f64
pub const MAX_SAFE_INTEGER: f64 = 9007199254740991f64
The maximum safe integer in JavaScript (2^53 - 1).
sourcepub const MAX_VALUE: f64 = 1.7976931348623157E+308f64
pub const MAX_VALUE: f64 = 1.7976931348623157E+308f64
The largest positive representable number.
sourcepub const MIN_SAFE_INTEGER: f64 = -9007199254740991f64
pub const MIN_SAFE_INTEGER: f64 = -9007199254740991f64
The minimum safe integer in JavaScript (-(2^53 - 1)).
sourcepub const MIN_VALUE: f64 = 4.9406564584124654E-324f64
pub const MIN_VALUE: f64 = 4.9406564584124654E-324f64
The smallest positive representable number—that is, the positive number closest to zero (without actually being zero).
sourcepub const NEGATIVE_INFINITY: f64 = -Inff64
pub const NEGATIVE_INFINITY: f64 = -Inff64
Special value representing negative infinity. Returned on overflow.
sourcepub const POSITIVE_INFINITY: f64 = +Inff64
pub const POSITIVE_INFINITY: f64 = +Inff64
Special value representing infinity. Returned on overflow.
sourcepub fn unsigned_shr(&self, rhs: &Self) -> Self
pub fn unsigned_shr(&self, rhs: &Self) -> Self
Applies the binary >>>
JS operator on the two Number
s.
Methods from Deref<Target = Object>§
sourcepub fn constructor(&self) -> Function
pub fn constructor(&self) -> Function
The constructor property returns a reference to the Object
constructor
function that created the instance object.
sourcepub fn has_own_property(&self, property: &JsValue) -> bool
pub fn has_own_property(&self, property: &JsValue) -> bool
The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
sourcepub fn is_prototype_of(&self, value: &JsValue) -> bool
pub fn is_prototype_of(&self, value: &JsValue) -> bool
The isPrototypeOf()
method checks if an object exists in another
object’s prototype chain.
sourcepub fn property_is_enumerable(&self, property: &JsValue) -> bool
pub fn property_is_enumerable(&self, property: &JsValue) -> bool
The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
sourcepub fn to_locale_string(&self) -> JsString
pub fn to_locale_string(&self) -> JsString
The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
sourcepub fn to_string(&self) -> JsString
pub fn to_string(&self) -> JsString
The toString()
method returns a string representing the object.
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
.
sourcepub fn js_in(&self, obj: &JsValue) -> bool
pub fn js_in(&self, obj: &JsValue) -> bool
Applies the binary in
JS operator on the two JsValue
s.
sourcepub fn loose_eq(&self, other: &JsValue) -> bool
pub fn loose_eq(&self, other: &JsValue) -> bool
Compare two JsValue
s for equality, using the ==
operator in JS.
sourcepub fn unsigned_shr(&self, rhs: &JsValue) -> u32
pub fn unsigned_shr(&self, rhs: &JsValue) -> u32
Applies the binary >>>
JS operator on the two JsValue
s.
sourcepub fn checked_div(&self, rhs: &JsValue) -> JsValue
pub fn checked_div(&self, rhs: &JsValue) -> JsValue
Applies the binary /
JS operator on two JsValue
s, catching and returning any RangeError
thrown.
sourcepub fn pow(&self, rhs: &JsValue) -> JsValue
pub fn pow(&self, rhs: &JsValue) -> JsValue
Applies the binary **
JS operator on the two JsValue
s.
sourcepub fn lt(&self, other: &JsValue) -> bool
pub fn lt(&self, other: &JsValue) -> bool
Applies the binary <
JS operator on the two JsValue
s.
sourcepub fn le(&self, other: &JsValue) -> bool
pub fn le(&self, other: &JsValue) -> bool
Applies the binary <=
JS operator on the two JsValue
s.
sourcepub fn ge(&self, other: &JsValue) -> bool
pub fn ge(&self, other: &JsValue) -> bool
Applies the binary >=
JS operator on the two JsValue
s.
sourcepub fn gt(&self, other: &JsValue) -> bool
pub fn gt(&self, other: &JsValue) -> bool
Applies the binary >
JS operator on the two JsValue
s.
sourcepub fn unchecked_into_f64(&self) -> f64
pub fn unchecked_into_f64(&self) -> f64
Applies the unary +
JS operator on a JsValue
. Can throw.
Trait Implementations§
source§impl FromWasmAbi for Number
impl FromWasmAbi for Number
source§impl<'a> IntoWasmAbi for &'a Number
impl<'a> IntoWasmAbi for &'a Number
source§impl IntoWasmAbi for Number
impl IntoWasmAbi for Number
source§impl JsCast for Number
impl JsCast for Number
source§fn instanceof(val: &JsValue) -> bool
fn instanceof(val: &JsValue) -> bool
instanceof
check to see whether the JsValue
provided is an instance of this type. Read moresource§fn is_type_of(val: &JsValue) -> bool
fn is_type_of(val: &JsValue) -> bool
JsValue
provided
is a value of this type. Read moresource§fn unchecked_from_js(val: JsValue) -> Self
fn unchecked_from_js(val: JsValue) -> Self
source§fn unchecked_from_js_ref(val: &JsValue) -> &Self
fn unchecked_from_js_ref(val: &JsValue) -> &Self
source§fn has_type<T>(&self) -> boolwhere
T: JsCast,
fn has_type<T>(&self) -> boolwhere T: JsCast,
T
. Read moresource§fn dyn_into<T>(self) -> Result<T, Self>where
T: JsCast,
fn dyn_into<T>(self) -> Result<T, Self>where T: JsCast,
T
. Read moresource§fn dyn_ref<T>(&self) -> Option<&T>where
T: JsCast,
fn dyn_ref<T>(&self) -> Option<&T>where T: JsCast,
T
. Read moresource§fn unchecked_into<T>(self) -> Twhere
T: JsCast,
fn unchecked_into<T>(self) -> Twhere T: JsCast,
source§impl LongRefFromWasmAbi for Number
impl LongRefFromWasmAbi for Number
source§impl OptionFromWasmAbi for Number
impl OptionFromWasmAbi for Number
source§impl<'a> OptionIntoWasmAbi for &'a Number
impl<'a> OptionIntoWasmAbi for &'a Number
source§impl OptionIntoWasmAbi for Number
impl OptionIntoWasmAbi for Number
source§impl PartialEq<BigInt> for Number
impl PartialEq<BigInt> for Number
source§impl PartialEq<Number> for BigInt
impl PartialEq<Number> for BigInt
source§impl PartialEq<Number> for Number
impl PartialEq<Number> for Number
source§impl PartialOrd<Number> for Number
impl PartialOrd<Number> for Number
source§fn le(&self, other: &Self) -> bool
fn le(&self, other: &Self) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl RefFromWasmAbi for Number
impl RefFromWasmAbi for Number
§type Abi = <JsValue as RefFromWasmAbi>::Abi
type Abi = <JsValue as RefFromWasmAbi>::Abi
Self
are recovered from.§type Anchor = ManuallyDrop<Number>
type Anchor = ManuallyDrop<Number>
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.impl StructuralPartialEq for Number
Auto Trait Implementations§
impl RefUnwindSafe for Number
impl !Send for Number
impl !Sync for Number
impl Unpin for Number
impl UnwindSafe for Number
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> ReturnWasmAbi for Twhere
T: IntoWasmAbi,
impl<T> ReturnWasmAbi for Twhere T: IntoWasmAbi,
§type Abi = <T as IntoWasmAbi>::Abi
type Abi = <T as IntoWasmAbi>::Abi
IntoWasmAbi::Abi
source§fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
IntoWasmAbi::into_abi
, except that it may throw and never
return in the case of Err
.