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Handlers

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Struct Handlers

pub struct Handlers;

Expand description

Utility method for setting empty handlers

Implementations§

impl Handlers

pub const NONE: Option<&'static Handler<NoHandler>> = None

None for any callback parameter — pins the callback generic to NoHandler so type inference works without a per-callback helper or turbofish. Replaces Handlers::no_available_image_handler() / no_unavailable_image_handler() / no_reserved_value_supplier_handler() / … with one constant. Parallels Option::None.

Auto Trait Implementations§

impl Freeze for Handlers

impl RefUnwindSafe for Handlers

impl Send for Handlers

impl Sync for Handlers

impl Unpin for Handlers

impl UnsafeUnpin for Handlers

impl UnwindSafe for Handlers

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T, U> TryFrom<U> for T
where 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>

Performs the conversion.

impl<T, U> TryInto<U> for T
where 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>

Performs the conversion.