38 lines
817 B
Rust
38 lines
817 B
Rust
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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 result::Result;
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use libimagref::reference::Ref;
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use std::marker::PhantomData;
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struct MailIter<'a, I: 'a + Iterator<Item = Ref<'a>>> {
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_marker: PhantomData<&'a I>,
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i: I,
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}
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impl<'a, I: Iterator<Item = Ref<'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 = Ref<'a>>> Iterator for MailIter<'a, I> {
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type Item = Result<Mail<'a>>;
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fn next(&mut self) -> Option<Result<Mail<'a>>> {
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self.i.next().map(Mail::from_ref)
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}
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}
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