Trait sp_externalities::ExternalitiesExt[−][src]

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>[src]

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

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

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>[src]

Deregister and drop extension of T type.

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

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Implementors

impl ExternalitiesExt for &mut dyn Externalities[src]

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