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Revert "Add extension traits for handling Result<Option<T>, E> conversion"

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This reverts commit d810b63886f4006d01bca894982bbc867616f37c.

As resiter v0.4.0 does provide this extension now, we don't need it in
the codebase anymore.
This commit is contained in:
Matthias Beyer 2019-10-26 16:33:05 +02:00
parent 434f84c80d
commit 106be5746d
3 changed files with 0 additions and 85 deletions
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46
lib/core/libimagerror/src/iter.rs
View file

@ -128,49 +128,3 @@ impl<I, T> TraceIterator<T> for I where
I: Iterator<Item = Result<T, Error>>
{}
/// Extension trait for doing
///
/// ```ignore
/// Iterator<Item = Result<Option<T>, E>> -> Iterator<Item = Result<T, E>>
/// ```
///
pub trait IterInnerOkOrElse<T, E, F>
where T: Sized,
E: Sized,
Self: Iterator<Item = Result<Option<T>, E>> + Sized,
F: Fn() -> E,
{
fn map_inner_ok_or_else(self, f: F) -> IterInnerOkOrElseImpl<Self, T, E, F>;
}
pub struct IterInnerOkOrElseImpl<I, T, E, F>(I, F)
where I: Iterator<Item = Result<Option<T>, E>> + Sized,
T: Sized,
E: Sized,
F: Fn() -> E;
impl<I, T, E, F> IterInnerOkOrElse<T, E, F> for I
where I: Iterator<Item = Result<Option<T>, E>> + Sized,
T: Sized,
E: Sized,
F: Fn() -> E,
{
fn map_inner_ok_or_else(self, f: F) -> IterInnerOkOrElseImpl<I, T, E, F> {
IterInnerOkOrElseImpl(self, f)
}
}
impl<I, T, E, F> Iterator for IterInnerOkOrElseImpl<I, T, E, F>
where I: Iterator<Item = Result<Option<T>, E>> + Sized,
T: Sized,
E: Sized,
F: Fn() -> E,
{
type Item = Result<T, E>;
fn next(&mut self) -> Option<Self::Item> {
self.0.next().map(|e| e.and_then(|opt| opt.ok_or_else(|| (self.1)())))
}
}

1
lib/core/libimagerror/src/lib.rs
View file

@ -44,7 +44,6 @@ pub mod errors;
pub mod exit;
pub mod io;
pub mod iter;
pub mod result;
pub mod str;
pub mod trace;

38
lib/core/libimagerror/src/result.rs
View file

@ -1,38 +0,0 @@
//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2019 the imag 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
//
/// Extension trait for doing `Result<Option<T>, E> -> Result<T, E>`
pub trait ResultOptionExt<T, E, F>
where T: Sized,
E: Sized,
F: FnOnce() -> E
{
fn inner_ok_or_else(self, f: F) -> Result<T, E>;
}
impl<T, E, F> ResultOptionExt<T, E, F> for Result<Option<T>, E>
where T: Sized,
E: Sized,
F: FnOnce() -> E
{
fn inner_ok_or_else(self, f: F) -> Result<T, E> {
self.and_then(|opt| opt.ok_or_else(f))
}
}