sprs 0.11.0

//! This module abstracts over ranges to allow functions in the crate to take
//! ranges as input in an ergonomic way. It howvers seals this abstractions to
//! leave full control in this crate.

/// Abstract over `std::ops::{Range,RangeFrom,RangeTo,RangeFull}`
pub trait Range {
    fn start(&self) -> usize;

    fn end(&self) -> Option<usize>;
}

impl Range for std::ops::Range<usize> {
    fn start(&self) -> usize {
        self.start
    }

    fn end(&self) -> Option<usize> {
        Some(self.end)
    }
}

impl Range for std::ops::RangeFrom<usize> {
    fn start(&self) -> usize {
        self.start
    }

    fn end(&self) -> Option<usize> {
        None
    }
}

impl Range for std::ops::RangeTo<usize> {
    fn start(&self) -> usize {
        0
    }

    fn end(&self) -> Option<usize> {
        Some(self.end)
    }
}

impl Range for std::ops::RangeFull {
    fn start(&self) -> usize {
        0
    }

    fn end(&self) -> Option<usize> {
        None
    }
}

impl Range for std::ops::RangeInclusive<usize> {
    fn start(&self) -> usize {
        *self.start()
    }

    fn end(&self) -> Option<usize> {
        Some(*self.end() + 1)
    }
}

impl Range for std::ops::RangeToInclusive<usize> {
    fn start(&self) -> usize {
        0
    }

    fn end(&self) -> Option<usize> {
        Some(self.end + 1)
    }
}