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Diffstat (limited to 'lib/domain/libimagmail/src/iter.rs')
-rw-r--r-- | lib/domain/libimagmail/src/iter.rs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/domain/libimagmail/src/iter.rs b/lib/domain/libimagmail/src/iter.rs new file mode 100644 index 00000000..771d45a5 --- /dev/null +++ b/lib/domain/libimagmail/src/iter.rs @@ -0,0 +1,56 @@ +// +// imag - the personal information management suite for the commandline +// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; version +// 2.1 of the License. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +// + +//! Module for the MailIter +//! +//! MailIter is a iterator which takes an Iterator that yields `Ref` and yields itself +//! `Result<Mail>`, where `Err(_)` is returned if the Ref is not a Mail or parsing of the +//! referenced mail file failed. +//! + +use mail::Mail; +use result::Result; + +use libimagref::reference::Ref; + +use std::marker::PhantomData; + +pub struct MailIter<'a, I: 'a + Iterator<Item = Ref<'a>>> { + _marker: PhantomData<&'a I>, + i: I, +} + +impl<'a, I: Iterator<Item = Ref<'a>>> MailIter<'a, I> { + + pub fn new(i: I) -> MailIter<'a, I> { + MailIter { _marker: PhantomData, i: i } + } + +} + +impl<'a, I: Iterator<Item = Ref<'a>>> Iterator for MailIter<'a, I> { + + type Item = Result<Mail<'a>>; + + fn next(&mut self) -> Option<Result<Mail<'a>>> { + self.i.next().map(Mail::from_ref) + } + +} + |