Trait MetaBox

pub trait MetaBox {
    // Required methods
    fn as_erased(&self) -> ErasedInner<'_>;
    fn as_erased_mut(&mut self) -> ErasedInnerMut<'_>;
}

A dyn compatible alternative to Any that can contain multiple items.

Required Methods

fn as_erased(&self) -> ErasedInner<'_>

fn as_erased_mut(&mut self) -> ErasedInnerMut<'_>

Implementations

impl dyn MetaBox + '_

pub fn get<T: 'static>(&self) -> Option<&T>

Obtain an item if it exists in the MetaBox.

Always returns Some for ().

pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T>

Obtain an item if it exists in the MetaBox.

Always returns Some for ().

Implementations on Foreign Types

impl MetaBox for ()

fn as_erased<'t>(&self) -> ErasedInner<'_>

fn as_erased_mut(&mut self) -> ErasedInnerMut<'_>

impl<T: 'static> MetaBox for Option<T>

fn as_erased<'t>(&self) -> ErasedInner<'_>

fn as_erased_mut(&mut self) -> ErasedInnerMut<'_>

impl<T: MetaBox> MetaBox for &T

fn as_erased<'t>(&self) -> ErasedInner<'_>

fn as_erased_mut(&mut self) -> ErasedInnerMut<'_>

impl<T: MetaBox> MetaBox for &mut T

fn as_erased<'t>(&self) -> ErasedInner<'_>

fn as_erased_mut(&mut self) -> ErasedInnerMut<'_>

Implementors

impl<A: MetaTuple, B: MetaTuple> MetaBox for Join<A, B>

impl<T: 'static> MetaBox for MetaItem<T>