pub struct Entry<'a, T: 'a> { /* private fields */ }Expand description
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);Implementations§
Source§impl<'a, T> Entry<'a, T>where
T: Resource + 'a,
impl<'a, T> Entry<'a, T>where
T: Resource + 'a,
Sourcepub fn or_insert(self, v: T) -> FetchMut<'a, T>
pub fn or_insert(self, v: T) -> FetchMut<'a, T>
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.
Sourcepub fn or_insert_with<F>(self, f: F) -> FetchMut<'a, T>where
F: FnOnce() -> T,
pub fn or_insert_with<F>(self, f: F) -> FetchMut<'a, T>where
F: FnOnce() -> T,
Returns this entry’s value, inserts and returns the return value of f
otherwise.
Auto Trait Implementations§
impl<'a, T> Freeze for Entry<'a, T>
impl<'a, T> !RefUnwindSafe for Entry<'a, T>
impl<'a, T> Send for Entry<'a, T>where
T: Send,
impl<'a, T> Sync for Entry<'a, T>where
T: Sync,
impl<'a, T> Unpin for Entry<'a, T>where
T: Unpin,
impl<'a, T> !UnwindSafe for Entry<'a, T>
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
Mutably borrows from an owned value. Read more