Enum js_option::JsOption [−][src]
pub enum JsOption<T> { Some(T), Null, Undefined, }
An Option
-like type with two data-less variants in addition to Some
:
Null
and Undefined
.
Variants
Some value T
Explicit absence of a value
Implicit absence of a value
Implementations
impl<T> JsOption<T>
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impl<T> JsOption<T>
[src]pub fn from_option(opt: Option<T>) -> Self
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pub fn from_option(opt: Option<T>) -> Self
[src]Construct a JsOption
from a regular Option
.
None
will be converted to to Null
.
pub fn from_implicit_option(opt: Option<T>) -> Self
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pub fn from_implicit_option(opt: Option<T>) -> Self
[src]Construct a JsOption
from a regular Option
.
None
will be converted to Undefined
.
pub fn into_option(self) -> Option<T>
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pub fn into_option(self) -> Option<T>
[src]Convert a JsOption
to Option
.
pub fn into_nested_option(self) -> Option<Option<T>>
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pub fn into_nested_option(self) -> Option<Option<T>>
[src]Convert a JsOption<T>
to Option<Option<T>>
.
Null
is represented as Some(None)
while Undefined
is represented
as None
.
pub const fn is_undefined(&self) -> bool
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pub const fn is_undefined(&self) -> bool
[src]Returns true
if the JsOption
is Undefined
.
pub fn unwrap(self) -> T
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pub fn unwrap(self) -> T
[src]Returns the contained Some
value, consuming the self
value.
Panics
Panics if the self value equals Null
or Undefined
.
pub fn unwrap_or_else<F: FnOnce() -> T>(self, f: F) -> T
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pub fn unwrap_or_else<F: FnOnce() -> T>(self, f: F) -> T
[src]Returns the contained Some
value computes is from a closure.
impl<T: Default> JsOption<T>
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impl<T: Default> JsOption<T>
[src]pub fn unwrap_or_default(self) -> T
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pub fn unwrap_or_default(self) -> T
[src]Returns the contained Some
value or a default.
impl<T: DerefMut> JsOption<T>
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impl<T: DerefMut> JsOption<T>
[src]pub fn as_deref_mut(&mut self) -> JsOption<&mut <T as Deref>::Target>
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pub fn as_deref_mut(&mut self) -> JsOption<&mut <T as Deref>::Target>
[src]Converts from &mut JsOption<T>
to JsOption<&mut T::Target>
.
Trait Implementations
impl<'de, T> Deserialize<'de> for JsOption<T> where
T: Deserialize<'de>,
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impl<'de, T> Deserialize<'de> for JsOption<T> where
T: Deserialize<'de>,
[src]fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where
D: Deserializer<'de>,
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where
D: Deserializer<'de>,
[src]Deserialize a JsOption
.
This implementation will never return Undefined
. You need to use
#[serde(default)]
to get Undefined
when the field is not present.
impl<T: Ord> Ord for JsOption<T>
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impl<T: Ord> Ord for JsOption<T>
[src]impl<T: PartialOrd> PartialOrd<JsOption<T>> for JsOption<T>
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impl<T: PartialOrd> PartialOrd<JsOption<T>> for JsOption<T>
[src]fn partial_cmp(&self, other: &JsOption<T>) -> Option<Ordering>
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fn partial_cmp(&self, other: &JsOption<T>) -> Option<Ordering>
[src]This method returns an ordering between self
and other
values if one exists. Read more
#[must_use]fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]fn lt(&self, other: &Rhs) -> bool
1.0.0[src]This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]fn le(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]fn le(&self, other: &Rhs) -> bool
1.0.0[src]This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
impl<T: Copy> Copy for JsOption<T>
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impl<T: Eq> Eq for JsOption<T>
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impl<T> StructuralEq for JsOption<T>
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impl<T> StructuralPartialEq for JsOption<T>
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Auto Trait Implementations
impl<T> RefUnwindSafe for JsOption<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for JsOption<T> where
T: Send,
T: Send,
impl<T> Sync for JsOption<T> where
T: Sync,
T: Sync,
impl<T> Unpin for JsOption<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for JsOption<T> where
T: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
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pub fn clone_into(&self, target: &mut T)
[src]🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
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T: for<'de> Deserialize<'de>,