NewFrom

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Trait NewFrom 

Source 
pub trait NewFrom {
    type Builder;

    // Required methods
    fn new() -> Self::Builder;
    fn from_super(e: Box<dyn Exception>) -> Self
       where Self: Sized;
}
Expand description

§New or From Exception

Use this trait to create an Exception

§example

impl NewFrom for SuperException {
    type Builder = SuperBuilder;

    fn new() -> Self::Builder {
        SuperBuilder::new()
    }
    fn from(e: Box<dyn Exception>) -> Self where Self: Sized {
        SuperException {
            code: e.code(),
            msg: String::from(e.msg()),
            level: e.level(),
        }
    }
}

Required Associated Types§

Source

type Builder

Required Methods§

Source

fn new() -> Self::Builder

create a new Exception

Source

fn from_super(e: Box<dyn Exception>) -> Self
where Self: Sized,

create a new Exception from any Exception

  • can convert from : supper

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.

Implementors§