56 lines
1.7 KiB
Rust
56 lines
1.7 KiB
Rust
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//
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// imag - the personal information management suite for the commandline
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// Copyright (C) 2015-2019 Matthias Beyer <mail@beyermatthias.de> and contributors
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; version
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// 2.1 of the License.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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//! Module for the MailIter
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//!
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//! MailIter is a iterator which takes an Iterator that yields `Ref` and yields itself
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//! `Result<Mail>`, where `Err(_)` is returned if the Ref is not a Mail or parsing of the
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//! referenced mail file failed.
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//!
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use mail::Mail;
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use failure::Fallible as Result;
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use libimagstore::store::FileLockEntry;
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use std::marker::PhantomData;
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pub struct MailIter<'a, I: Iterator<Item = FileLockEntry<'a>>> {
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_marker: PhantomData<I>,
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i: I,
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}
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impl<'a, I: Iterator<Item = FileLockEntry<'a>>> MailIter<'a, I> {
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pub fn new(i: I) -> MailIter<'a, I> {
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MailIter { _marker: PhantomData, i: i }
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}
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}
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impl<'a, I: Iterator<Item = FileLockEntry<'a>>> Iterator for MailIter<'a, I> {
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type Item = Result<Mail<'a>>;
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fn next(&mut self) -> Option<Self::Item> {
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self.i.next().map(Mail::from_fle)
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}
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}
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