Method push

lazy_errors/src/stash.rs:318–337

(&mut self, err: E)

    /// you can call [`push_and_convert`](Self::push_and_convert) instead.
    #[track_caller]
    pub fn push<E>(&mut self, err: E) -> &mut StashWithErrors<I>
    where
        E: Into<I>,
    {
        // We need to move out of `&mut self`
        // because we want to call `f()` which is `FnOnce()`.

        let mut swap = Self::WithErrors(StashWithErrors {
            summary:   String::new().into_boxed_str(),
            errors:    vec![],
            locations: vec![],
        });

        core::mem::swap(self, &mut swap);
        *self = ErrorStash::WithErrors(swap.push_and_convert(err));
        match self {
            ErrorStash::Empty(_) => unreachable!(),
            ErrorStash::WithErrors(stash_with_errors) => stash_with_errors,
        }
    }

    /// Adds an error to this stash,
    /// consumes `self`, and returns the inner [`StashWithErrors`] by value.