#![allow(unused_imports)]
use crate::properties::{Properties, RawValue};
macro_rules! impls {
($name:ident, $valuetype:ty) => {
impl<'a> Iterator for $name<'a> {
type Item = (&'a str, $valuetype);
#[cfg(not(feature = "allow-empty-values"))]
fn next(&mut self) -> Option<Self::Item> {
loop {
let pair = self.0.next()?;
if pair.1.is_unset() {
continue;
}
let (ref key, val) = pair;
break Some((key, val));
}
}
#[cfg(feature = "allow-empty-values")]
fn next(&mut self) -> Option<Self::Item> {
let pair = self.0.next()?;
let (ref key, val) = pair;
Some((key, val))
}
#[cfg(not(feature = "allow-empty-values"))]
fn size_hint(&self) -> (usize, Option<usize>) {
(0, self.0.size_hint().1)
}
#[cfg(feature = "allow-empty-values")]
fn size_hint(&self) -> (usize, Option<usize>) {
self.0.size_hint()
}
}
impl<'a> DoubleEndedIterator for $name<'a> {
#[cfg(not(feature = "allow-empty-values"))]
fn next_back(&mut self) -> Option<Self::Item> {
loop {
let pair = self.0.next_back()?;
if pair.1.is_unset() {
continue;
}
let (ref key, val) = pair;
break Some((key, val));
}
}
#[cfg(feature = "allow-empty-values")]
fn next_back(&mut self) -> Option<Self::Item> {
let pair = self.0.next_back()?;
let (ref key, val) = pair;
Some((key, val))
}
}
impl<'a> std::iter::FusedIterator for $name<'a> {}
};
}
#[derive(Clone)]
pub struct Iter<'a>(pub(super) std::slice::Iter<'a, (String, RawValue)>);
impls! {Iter, &'a RawValue}
pub struct IterMut<'a>(pub(super) std::slice::IterMut<'a, (String, RawValue)>);
impls! {IterMut, &'a mut RawValue}