Trait cex::MapError

pub trait MapError<T, Src> where
    Self: Into<Result<T, Src>>, {
    fn map_error<Dest, Indices>(self) -> Result<T, Dest>
    where
        Src: Sized + ExchangeInto<Dest, Indices>,
    { ... }
}

Enum exchange for Err combinator.

use enumx::export::*;
use enumx::predefined::*;
use cex::*;

let error: Result<(),i32> = Err( 42 );
let error: Result<(),Enum!(i32,bool)> = error.map_error();
assert_eq!( error, Err( Enum2::_0(42) ));

Provided methods

fn map_error<Dest, Indices>(self) -> Result<T, Dest> where
    Src: Sized + ExchangeInto<Dest, Indices>, 

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Implementors

impl<Res, T, Src> MapError<T, Src> for Res where
    Res: Into<Result<T, Src>>, 

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