Trait TypeWitnessTypeArg

pub trait TypeWitnessTypeArg {
    type Arg: ?Sized;
}

Expand description

Gets the type argument that this type witness witnesses.

A type witness is an enum whose variants only have TypeEq fields. Each variant requires the enum’s type parameter to be a specific type.

This trait should be implemented generically, as generic as the type definition of the implementor, doing so will help type inference.

Required Associated Types§

The type parameter used for type witnesses.

Usually, enums that implement this trait have variants with TypeEq<Self::Arg, SomeType> fields.

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".