Trait Discriminant 

pub trait Discriminant<M>
where
    Self: PartialEq + Debug,
{ }

A trait that describes a value that message variants can be compared by

Examples

use evelyn::Message
use evelyn::Discriminant
// For enums Discriminant trait is implemented for `std::mem::Discriminant`
enum TestMessage {
   A,
   B,
}
impl Message for TestMessage {
    type Discriminant = std::mem::Discriminant<Self>;
    fn discriminant(&self) -> Self::Discriminant {
        std::mem::discriminant(self)
    }
}
// Example implementation for strings using first 5 characters as discriminant
impl Message for String {
    type Discriminant = [char; 5];
    fn discriminant(&self) -> Self::Discriminant {
        self.chars.take(5).collect()
    }
}

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

impl Discriminant<String> for [char; 5]

impl<T> Discriminant<T> for Discriminant<T>

Implementors