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use super::{super::list::*, error::*, mode::*};
use {kutil::std::error::*, std::fmt};
impl<AnnotatedT> List<AnnotatedT> {
/// Merge another list into this list. Return true if any change happened.
///
/// The merging behavior depends on the [MergeMode].
pub fn merge_with_errors<'own, ErrorReceiverT>(
&mut self,
other: &'own Self,
merge_mode: &MergeMode,
errors: &mut ErrorReceiverT,
) -> Result<bool, MergeError<'own, AnnotatedT>>
where
AnnotatedT: Clone,
ErrorReceiverT: ErrorReceiver<MergeError<'own, AnnotatedT>>,
{
match merge_mode.list {
ListMergeMode::Append => {
if other.inner.is_empty() {
Ok(false)
} else {
self.inner.extend(other.inner.iter().cloned());
Ok(true)
}
}
ListMergeMode::SkipExisting => {
let mut changed = false;
for item in &other.inner {
if self.push_unique_clone(item) {
changed = true;
}
}
Ok(changed)
}
ListMergeMode::FailExisting => {
let mut changed = false;
for item in &other.inner {
if self.push_unique_clone(item) {
changed = true;
} else {
errors.give(MergeError::new(item))?;
}
}
Ok(changed)
}
ListMergeMode::Replace => {
if self == other {
Ok(false)
} else {
self.inner = other.inner.clone();
Ok(true)
}
}
}
}
/// Merge another list into this list while failing on the first encountered error.
/// Return true if any change happened.
///
/// The merging behavior depends on the [MergeMode].
pub fn merge_with_mode<'own>(
&mut self,
other: &'own Self,
merge_mode: &MergeMode,
) -> Result<bool, MergeError<'own, AnnotatedT>>
where
AnnotatedT: Clone,
{
self.merge_with_errors(other, merge_mode, &mut FailFastErrorReceiver)
}
/// Merge another list into this list. Return true if any change happened.
///
/// Uses the default [MergeMode].
pub fn merge(&mut self, other: &Self) -> bool
where
AnnotatedT: Clone + fmt::Debug,
{
// The default mode should never cause errors, so unwrap is safe
self.merge_with_mode(other, &Default::default()).expect("merge_with_mode")
}
}