Struct LibState 

pub struct LibState(/* private fields */);

Implementations

impl LibState

pub fn get_or_default<T>(&mut self) -> &mut T

where T: Default + Any + Send + Sync + 'static,

Look up and return the context global library state of type T.

If none is registered in this context for T then create one using T::default

pub fn get_or_else<T, F>(&mut self, f: F) -> &mut T

where T: Any + Send + Sync + 'static, F: FnOnce() -> T,

Look up and return the context global library state of type T.

If none is registered in this context for T then create one using the provided function.

pub fn get<T>(&mut self) -> Option<&T>

where T: Any + Send + Sync + 'static,

Look up and return a reference to the context global library state of type T.

If none is registered in this context for T return None

pub fn get_mut<T>(&mut self) -> Option<&mut T>

where T: Any + Send + Sync + 'static,

Look up and return a mutable reference to the context global library state of type T.

If none is registered return None

pub fn set<T>(&mut self, t: T) -> Option<Box<T>>

where T: Any + Send + Sync + 'static,

Set the context global library state of type T

Any existing state will be returned

pub fn remove<T>(&mut self) -> Option<Box<T>>

where T: Any + Send + Sync + 'static,

Remove and refurn the context global state library state of type T

Trait Implementations

impl Default for LibState

fn default() -> LibState

Returns the “default value” for a type.