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use core::cmp::{Ord, Ordering};
pub trait IndexRange: core::fmt::Debug {
fn lower(&self) -> u64;
fn upper(&self) -> u64;
fn contained(&self) -> bool;
fn tuple(&self) -> (u64, u64, bool) {
(
<Self as IndexRange>::lower(&self),
<Self as IndexRange>::upper(&self),
self.contained(),
)
}
}
impl Ord for dyn IndexRange {
fn cmp(&self, other: &Self) -> Ordering {
let l_cmp = self.lower().cmp(&other.lower());
if l_cmp != Ordering::Equal {
return l_cmp;
}
let u_cmp = self.upper().cmp(&other.upper());
if u_cmp != Ordering::Equal {
return u_cmp;
}
Ordering::Equal
}
}
impl PartialOrd for dyn IndexRange {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl PartialEq for dyn IndexRange {
fn eq(&self, other: &Self) -> bool {
self.lower() == other.lower() && self.upper() == other.upper()
}
}
impl Eq for dyn IndexRange {}
#[derive(Debug, PartialEq, Eq)]
pub struct CoveredRange {
upper: u64,
lower: u64,
}
impl CoveredRange {
#[must_use]
pub fn new(lower: u64, upper: u64) -> Self {
CoveredRange { upper, lower }
}
}
impl IndexRange for CoveredRange {
fn upper(&self) -> u64 {
self.upper
}
fn lower(&self) -> u64 {
self.lower
}
fn contained(&self) -> bool {
true
}
}
#[derive(Debug, PartialEq, Eq)]
pub struct OverlappingRange {
upper: u64,
lower: u64,
}
impl OverlappingRange {
#[must_use]
pub fn new(lower: u64, upper: u64) -> Self {
OverlappingRange { upper, lower }
}
}
impl IndexRange for OverlappingRange {
fn upper(&self) -> u64 {
self.upper
}
fn lower(&self) -> u64 {
self.lower
}
fn contained(&self) -> bool {
false
}
}