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polkadot_sdk_frame::traits

Trait InstanceFilter

pub trait InstanceFilter<T>:
    Sized
    + Send
    + Sync {
    // Required method
    fn filter(&self, _: &T) -> bool;

    // Provided method
    fn is_superset(&self, _o: &Self) -> bool { ... }
}
Expand description

Simple trait for providing a filter over a reference to some type, given an instance of itself.

Required Methods§

fn filter(&self, _: &T) -> bool

Determine if a given value should be allowed through the filter (returns true) or not.

Provided Methods§

fn is_superset(&self, _o: &Self) -> bool

Determines whether self matches at least everything that _o does.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types§

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impl<T> InstanceFilter<T> for ()

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fn filter(&self, _: &T) -> bool

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fn is_superset(&self, _o: &()) -> bool

Implementors§