Trait libimagutil::iter::FoldResult [−] [src]

pub trait FoldResult: Sized {
    type Item;
    fn fold_result<R, E, F>(self, func: F) -> Result<(), E>
    where
        F: FnMut(Self::Item) -> Result<R, E>;
}

Folds its contents to a result.

Associated Types

Required Methods

Apply a FnMut(Self::Item) -> Result<R, E> to each item. If each application returns an Ok(_), return Ok(()), indicating success. Otherwise return the first error.

The return type of this function only indicates success with the Ok(()) idiom. To retrieve the values of your application, include an accumulator in func. This is the intended reason for the permissive FnMut type.

Implementors