From 0250a2c66259f147962ec40cbf86bfb5de04c886 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Tue, 4 Oct 2016 14:19:36 +0200
Subject: [PATCH] Add MailIter

---
 libimagmail/src/iter.rs | 37 +++++++++++++++++++++++++++++++++++++
 libimagmail/src/lib.rs  |  1 +
 2 files changed, 38 insertions(+)
 create mode 100644 libimagmail/src/iter.rs

diff --git a/libimagmail/src/iter.rs b/libimagmail/src/iter.rs
new file mode 100644
index 00000000..365a0928
--- /dev/null
+++ b/libimagmail/src/iter.rs
@@ -0,0 +1,37 @@
+//! 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;
+
+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)
+    }
+
+}
+
diff --git a/libimagmail/src/lib.rs b/libimagmail/src/lib.rs
index e4db2f4f..1d88a069 100644
--- a/libimagmail/src/lib.rs
+++ b/libimagmail/src/lib.rs
@@ -10,6 +10,7 @@ extern crate libimagref;
 
 pub mod error;
 pub mod hasher;
+pub mod iter;
 pub mod mail;
 pub mod result;