Enum Changes 

pub enum Changes<Index> {
    None,
    NoPreparedItems,
    Range(Range<Index>),
    Any,
}

Indicates whether an update to a clerk changes any available data

Variants

None

Indicates that no changes to the data set occurred.

NoPreparedItems

Indicates that the data length may have changed and/or items outside the current view_range may have changed.

I.e. this variant is applicable when within the subset of view_range and the new data range (0..len), no index-key pairs have changed (no re-ordering) and no item or token values have changed.

Range(Range<Index>)

Indicates that the data length may have changed and that keys and/or values within the given range may have changed.

TokenClerk::update_token will be called for each index in the intersection of the given range with the view_range.

Any

Any indicates that changes to the data set may have occurred.

This is equivalent to Changes::Range(full_data_range).

Trait Implementations

impl<Index: Clone> Clone for Changes<Index>

fn clone(&self) -> Changes<Index>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Index: Debug> Debug for Changes<Index>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Index: PartialEq> PartialEq for Changes<Index>

fn eq(&self, other: &Changes<Index>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<Index: Eq> Eq for Changes<Index>

impl<Index> StructuralPartialEq for Changes<Index>