[−][src]Struct shred::Entry
An entry to a resource of the World
struct.
This is similar to the Entry API found in the standard library.
Examples
use shred::World; #[derive(Debug)] struct Res(i32); let mut world = World::empty(); let value = world.entry().or_insert(Res(4)); println!("{:?}", value.0 * 2);
Methods
impl<'a, T> Entry<'a, T> where
T: Resource + 'a,
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T: Resource + 'a,
pub fn or_insert(self, v: T) -> FetchMut<'a, T>
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Returns this entry's value, inserts and returns v
otherwise.
Please note that you should use or_insert_with
in case the creation of
the value is expensive.
pub fn or_insert_with<F>(self, f: F) -> FetchMut<'a, T> where
F: FnOnce() -> T,
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F: FnOnce() -> T,
Returns this entry's value, inserts and returns the return value of f
otherwise.
Auto Trait Implementations
Blanket Implementations
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom 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.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Any for T where
T: Any,
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T: Any,