Tracking Issue for `integer_cast_extras`

Feature gate: #![feature(integer_cast_extras)]

This is a tracking issue for explicit checked, saturating, and strict casts between signed and unsigned primitive integers of equal bit-width.

Public API

For 8, 16, 32, 64, 128, and size integers:

impl uN {
    pub const fn checked_cast_signed(self) -> Option<iN>;
    pub const fn saturating_cast_signed(self) -> iN;
    pub const fn strict_cast_signed(self) -> iN;
}

impl iN {
    pub const fn checked_cast_unsigned(self) -> Option<uN>;
    pub const fn saturating_cast_unsigned(self) -> uN;
    pub const fn strict_cast_unsigned(self) -> uN;
}

Steps / History

• ACP: https://github.com/rust-lang/libs-team/issues/765
• Implementation: https://github.com/rust-lang/rust/pull/154664
• Final comment period (FCP)^1
• Stabilization PR

Unresolved Questions

• None yet.

Start by reviewing the public API and the linked implementation PR #154664, then read the stabilization guidance linked in the issue. The tracking work is complete when the final comment period and stabilization PR have been completed.