Enum bones_framework::asset::Maybe
source · #[repr(C, u8)]pub enum Maybe<T> {
Unset,
Set(T),
}
Expand description
Variants§
Implementations§
source§impl<T> Maybe<T>
impl<T> Maybe<T>
sourcepub fn contains<U>(&self, x: &U) -> boolwhere
U: PartialEq<T>,
pub fn contains<U>(&self, x: &U) -> boolwhere
U: PartialEq<T>,
Returns true
if the option is a Set
value containing the given value.
sourcepub fn unwrap_or_else<F>(self, f: F) -> Twhere
F: FnOnce() -> T,
pub fn unwrap_or_else<F>(self, f: F) -> Twhere
F: FnOnce() -> T,
Returns the contained Set
value or computes it from a closure.
sourcepub fn map<U, F>(self, f: F) -> Maybe<U>where
F: FnOnce(T) -> U,
pub fn map<U, F>(self, f: F) -> Maybe<U>where
F: FnOnce(T) -> U,
Maps a Maybe<T>
to Maybe<U>
by applying a function to a contained value.
sourcepub fn and_then<U, F>(self, f: F) -> Maybe<U>
pub fn and_then<U, F>(self, f: F) -> Maybe<U>
Returns Unset
if the option is Unset
, otherwise calls f
with the wrapped value and returns the result.
sourcepub fn and<U>(self, optb: Maybe<U>) -> Maybe<U>
pub fn and<U>(self, optb: Maybe<U>) -> Maybe<U>
Returns Unset
if the option is Unset
, otherwise returns optb
.
sourcepub fn filter<P>(self, predicate: P) -> Maybe<T>
pub fn filter<P>(self, predicate: P) -> Maybe<T>
Returns Unset
if the option is Unset
, otherwise calls predicate
with the wrapped value and returns:
sourcepub fn or(self, optb: Maybe<T>) -> Maybe<T>
pub fn or(self, optb: Maybe<T>) -> Maybe<T>
Returns the option if it contains a value, otherwise returns optb
.
sourcepub fn or_else<F>(self, f: F) -> Maybe<T>
pub fn or_else<F>(self, f: F) -> Maybe<T>
Returns the option if it contains a value, otherwise calls f
and returns the result.
sourcepub fn xor(self, optb: Maybe<T>) -> Maybe<T>
pub fn xor(self, optb: Maybe<T>) -> Maybe<T>
Returns Set
if exactly one of self
, optb
is Set
, otherwise returns Unset
.
sourcepub fn get_or_insert(&mut self, v: T) -> &mut T
pub fn get_or_insert(&mut self, v: T) -> &mut T
Inserts v
into the option if it is Unset
, then returns a mutable reference to the contained value.
sourcepub fn get_or_insert_with<F>(&mut self, f: F) -> &mut Twhere
F: FnOnce() -> T,
pub fn get_or_insert_with<F>(&mut self, f: F) -> &mut Twhere
F: FnOnce() -> T,
Inserts a value computed from f
into the option if it is Unset
, then returns a mutable reference to the contained value.
sourcepub fn take(&mut self) -> Maybe<T>
pub fn take(&mut self) -> Maybe<T>
Takes the value out of the option, leaving an Unset
in its place.
sourcepub fn replace(&mut self, value: T) -> Maybe<T>
pub fn replace(&mut self, value: T) -> Maybe<T>
Replaces the actual value in the option by the value given in parameter, returning the old value if present.
sourcepub unsafe fn unwrap_unchecked(self) -> T
pub unsafe fn unwrap_unchecked(self) -> T
Returns the contained Set
value, consuming the self
value, without checking that the value is not Unset
.
§Safety
Calling this method on an Unset
value is undefined behavior.
sourcepub fn map_or<U, F>(self, default: U, f: F) -> Uwhere
F: FnOnce(T) -> U,
pub fn map_or<U, F>(self, default: U, f: F) -> Uwhere
F: FnOnce(T) -> U,
Maps a Maybe<T>
to U
by applying a function to a contained value, or returns a default.
sourcepub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U
Maps a Maybe<T>
to U
by applying a function to a contained value, or computes a default.
sourcepub fn unwrap_or_default(self) -> Twhere
T: Default,
pub fn unwrap_or_default(self) -> Twhere
T: Default,
Returns the contained Set
value or a default.
sourcepub fn ok_or<E>(self, err: E) -> Result<T, E>
pub fn ok_or<E>(self, err: E) -> Result<T, E>
Transforms the Maybe<T>
into a Result<T, E>
, mapping Set(v)
to Ok(v)
and Unset
to Err(err)
.
sourcepub fn ok_or_else<E, F>(self, err: F) -> Result<T, E>where
F: FnOnce() -> E,
pub fn ok_or_else<E, F>(self, err: F) -> Result<T, E>where
F: FnOnce() -> E,
Transforms the Maybe<T>
into a Result<T, E>
, mapping Set(v)
to Ok(v)
and Unset
to Err(err())
.
Trait Implementations§
source§impl<T> HasSchema for Maybe<T>
impl<T> HasSchema for Maybe<T>
source§fn register_schema()
fn register_schema()
source§fn cast<T>(this: &Self) -> &Twhere
T: HasSchema,
fn cast<T>(this: &Self) -> &Twhere
T: HasSchema,
source§fn try_cast<T>(this: &Self) -> Result<&T, SchemaMismatchError>where
T: HasSchema,
fn try_cast<T>(this: &Self) -> Result<&T, SchemaMismatchError>where
T: HasSchema,
source§fn cast_mut<T>(this: &mut Self) -> &mut Twhere
T: HasSchema,
fn cast_mut<T>(this: &mut Self) -> &mut Twhere
T: HasSchema,
source§fn try_cast_mut<T>(this: &mut Self) -> Result<&mut T, SchemaMismatchError>where
T: HasSchema,
fn try_cast_mut<T>(this: &mut Self) -> Result<&mut T, SchemaMismatchError>where
T: HasSchema,
source§fn as_schema_ref(&self) -> SchemaRef<'_>where
Self: Sized,
fn as_schema_ref(&self) -> SchemaRef<'_>where
Self: Sized,
T
to a SchemaRef
source§fn as_schema_mut(&mut self) -> SchemaRefMut<'_>where
Self: Sized,
fn as_schema_mut(&mut self) -> SchemaRefMut<'_>where
Self: Sized,
T
to a SchemaRefMut
source§impl<T> Ord for Maybe<T>where
T: Ord,
impl<T> Ord for Maybe<T>where
T: Ord,
source§impl<T> PartialEq for Maybe<T>where
T: PartialEq,
impl<T> PartialEq for Maybe<T>where
T: PartialEq,
source§impl<T> PartialOrd for Maybe<T>where
T: PartialOrd,
impl<T> PartialOrd for Maybe<T>where
T: PartialOrd,
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl<T> Copy for Maybe<T>where
T: Copy,
impl<T> Eq for Maybe<T>where
T: Eq,
impl<T> StructuralPartialEq for Maybe<T>
Auto Trait Implementations§
impl<T> Freeze for Maybe<T>where
T: Freeze,
impl<T> RefUnwindSafe for Maybe<T>where
T: RefUnwindSafe,
impl<T> Send for Maybe<T>where
T: Send,
impl<T> Sync for Maybe<T>where
T: Sync,
impl<T> Unpin for Maybe<T>where
T: Unpin,
impl<T> UnwindSafe for Maybe<T>where
T: UnwindSafe,
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impl<T> AnyEq for T
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impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere
T: 'a,
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> CloneToUninit for Twhere
T: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
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default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
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