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// This file is part of caniuse-serde. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/caniuse-serde/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2017 The developers of caniuse-serde. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/caniuse-serde/master/COPYRIGHT.
/// A struct that exists to workaround Rust's lack (yet) of 'impl Trait'
#[derive(Debug, Clone)]
pub struct SupportRangeIterator<'a>
{
feature: &'a Feature<'a>,
range: Range<'a, Version, SupportDetail>,
}
impl<'a> Iterator for SupportRangeIterator<'a>
{
type Item = (&'a Version, Support<'a>);
/// Returns the next Support object.
#[inline(always)]
fn next(&mut self) -> Option<Self::Item>
{
let next = self.range.next();
self.transform(next)
}
}
impl<'a> DoubleEndedIterator for SupportRangeIterator<'a>
{
/// Returns the previous Support object.
#[inline(always)]
fn next_back(&mut self) -> Option<Self::Item>
{
let next = self.range.next_back();
self.transform(next)
}
}
impl<'a> SupportRangeIterator<'a>
{
#[inline(always)]
fn transform(&self, next: Option<(&'a Version, &'a SupportDetail)>) -> Option<(&'a Version, Support<'a>)>
{
next.map
(
|(version, support_detail)|
{
(
version,
Support
{
support_detail,
feature: self.feature,
}
)
}
)
}
}