Struct RangeSelector 

pub struct RangeSelector {
    pub start: usize,
    pub end: Option<usize>,
}

Range selector for limiting results.

Uses git-style positional semantics:

• ~N = single item at position N (1 = most recent)
• ~N: = range from position N to now (last N items)
• ~N:~M = range from position N to position M

Fields

start: usize

Start position from most recent (1 = most recent, 2 = second most recent)

end: Option<usize>

End position: None = single item, Some(0) = open range to now, Some(N) = to position N

Implementations

impl RangeSelector

pub fn is_single(&self) -> bool

Returns true if this selects a single item (no range).

pub fn is_last_n(&self) -> bool

Returns true if this is an open range to now (last N items).

pub fn last_n_count(&self) -> Option<usize>

Returns the count of items if this is a “last N” range.

Trait Implementations

impl Clone for RangeSelector

fn clone(&self) -> RangeSelector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RangeSelector

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

Formats the value using the given formatter.

impl PartialEq for RangeSelector

fn eq(&self, other: &RangeSelector) -> 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 Copy for RangeSelector

impl Eq for RangeSelector

impl StructuralPartialEq for RangeSelector