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Implement a user friendly Debug on GroupBy and GroupByMut

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This commit is contained in:
Clément Renault 2020-12-10 19:13:34 +01:00
parent 7952ea5a04
commit b2a7076b10
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1 changed files with 14 additions and 2 deletions
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16
library/core/src/slice/iter.rs
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@ -2976,7 +2976,6 @@ unsafe impl<'a, T> TrustedRandomAccess for IterMut<'a, T> {
/// [`group_by`]: ../../std/primitive.slice.html#method.group_by
/// [slices]: ../../std/primitive.slice.html
#[unstable(feature = "slice_group_by", issue = "none")]
#[derive(Debug)] // FIXME implement Debug to be more user friendly
pub struct GroupBy<'a, T: 'a, P> {
slice: &'a [T],
predicate: P,
@ -3048,6 +3047,13 @@ where
#[unstable(feature = "slice_group_by", issue = "none")]
impl<'a, T: 'a, P> FusedIterator for GroupBy<'a, T, P> where P: FnMut(&T, &T) -> bool {}
#[unstable(feature = "slice_group_by", issue = "none")]
impl<'a, T: 'a + fmt::Debug, P> fmt::Debug for GroupBy<'a, T, P> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("GroupBy").field("slice", &self.slice).finish()
}
}
/// An iterator over slice in (non-overlapping) mutable chunks separated
/// by a predicate.
///
@ -3056,7 +3062,6 @@ impl<'a, T: 'a, P> FusedIterator for GroupBy<'a, T, P> where P: FnMut(&T, &T) ->
/// [`group_by_mut`]: ../../std/primitive.slice.html#method.group_by_mut
/// [slices]: ../../std/primitive.slice.html
#[unstable(feature = "slice_group_by", issue = "none")]
#[derive(Debug)] // FIXME implement Debug to be more user friendly
pub struct GroupByMut<'a, T: 'a, P> {
slice: &'a mut [T],
predicate: P,
@ -3129,3 +3134,10 @@ where
#[unstable(feature = "slice_group_by", issue = "none")]
impl<'a, T: 'a, P> FusedIterator for GroupByMut<'a, T, P> where P: FnMut(&T, &T) -> bool {}
#[unstable(feature = "slice_group_by", issue = "none")]
impl<'a, T: 'a + fmt::Debug, P> fmt::Debug for GroupByMut<'a, T, P> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("GroupByMut").field("slice", &self.slice).finish()
}
}