Trait RangeStart

pub trait RangeStart<Idx = usize> {
    // Required method
    fn start(&self) -> Idx;
}

Expand description

A range with a defined inclusive lower bound.

This is the shared base of the crate’s extension traits. The implementations for std::ops::RangeTo, std::ops::RangeToInclusive, std::ops::RangeFull, and None anchor the start at Idx::zero(); for a signed index type the negative portion is not represented, so (..-5) reports itself empty.

For std::ops::RangeInclusive, the inherent start method shadows this one; call it as RangeStart::start(&range).

§Examples

use ps_range::RangeStart;

assert_eq!((2..8).start(), 2);
assert_eq!((..8).start(), 0);
assert_eq!(RangeStart::start(&(2..=8)), 2);

Returns the inclusive lower bound of the range.

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".