[−][src]Trait sp_externalities::ExternalitiesExt

pub trait ExternalitiesExt {
    fn extension<T: Any + Extension>(&mut self) -> Option<&mut T>;

    fn register_extension<T: Extension>(&mut self, ext: T) -> Result<(), Error>;

    fn deregister_extension<T: Extension>(&mut self) -> Result<(), Error>;
}
[−]

Extension for the Externalities trait.

Required methods

fn extension<T: Any + Extension>(&mut self) -> Option<&mut T>[−]

Tries to find a registered extension and returns a mutable reference.

fn register_extension<T: Extension>(&mut self, ext: T) -> Result<(), Error>[−]

Register extension ext.

Should return error if extension is already registered or extensions are not supported.

fn deregister_extension<T: Extension>(&mut self) -> Result<(), Error>[−]

Deregister and drop extension of T type.

Should return error if extension of type T is not registered or extensions are not supported.

Implementors

impl<'_> ExternalitiesExt for &'_ mut dyn Externalities[src][+]