Tracking Issue for `unsigned_signed_diff`

[davidzeng0]

Feature gate: #![feature(unsigned_signed_diff)]

This is a tracking issue for rust-lang/libs-team#381

Public API

impl uX {
        pub const fn overflowing_signed_diff(self, rhs: Self) -> (iX, bool);
	pub const fn saturating_signed_diff(self, rhs: Self) -> iX;
	pub const fn checked_signed_diff(self, rhs: Self) -> Option<iX>;
}

Steps / History

• Implementation: Implement unsigned_signed_diff #126042
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• None yet.

Footnotes

1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩

[davidzeng0]

For completeness, I could also implement rust-lang/libs-team#381 (comment)

impl iX {
    fn checked_unsigned_diff(self, rhs: Self) -> Option<uX>;
}

[pitaj]

checked_unsigned_diff should be under a separate feature and proposed as a new ACP.

Also, the overflowing, wrapping, saturating, and strict versions of this function are not implemented yet.