Struct externalities::Extensions

pub struct Extensions { /* fields omitted */ }

Stores extensions that should be made available through the externalities.

Implementations

impl Extensions

pub fn new() -> Self

Create new instance of Self.

pub fn register<E: Extension>(&mut self, ext: E)

Register the given extension.

pub fn register_with_type_id(
    &mut self,
    type_id: TypeId,
    extension: Box<dyn Extension>
) -> Result<(), Error>

Register extension extension using the given type_id.

pub fn get_mut(&mut self, ext_type_id: TypeId) -> Option<&mut dyn Any>

Return a mutable reference to the requested extension.

pub fn deregister(&mut self, type_id: TypeId) -> bool

Deregister extension for the given type_id.

Returns true when the extension was registered.

pub fn iter_mut<'a>(
    &'a mut self
) -> impl Iterator<Item = (&'a TypeId, &'a mut Box<dyn Extension>)>

Returns a mutable iterator over all extensions.

Trait Implementations

impl Debug for Extensions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Extensions

fn default() -> Extensions

Returns the “default value” for a type.