just/src/range_ext.rs

use common::*;

pub trait RangeExt<T> {
  fn range_contains(&self, i: T) -> bool;
}

impl<T> RangeExt<T> for Range<T>
where
  T: PartialOrd + Copy,
{
  fn range_contains(&self, i: T) -> bool {
    i >= self.start && i < self.end
  }
}

#[cfg(test)]
mod test {
  use super::*;

  #[test]
  fn range() {
    assert!((0..1).range_contains(0));
    assert!((10..20).range_contains(15));
    assert!(!(0..0).range_contains(0));
    assert!(!(1..10).range_contains(0));
    assert!(!(1..10).range_contains(10));
  }
}