Tracking Issue for {IpAddr, SocketAddr}::unspecified_from()

Feature gate: #![feature(addr_unspecified_from)]

This is a tracking issue for the IpAddr::unspecified_from() and SocketAddr::unspecified_from() functions for creating a 0.0.0.0:0/[::]:0 address matching the IP version of the input.

Public API

// core::net

impl IpAddr {
    pub fn unspecified_from(this: Self) -> Self;
}

impl SocketAddr {
    pub fn unspecified_from(this: Self) -> Self;
}

Steps / History

(Remember to update the S-tracking-* label when checking boxes.)

• ACP: rust-lang/libs-team#823
• Implementation: #160905
• Final comment period (FCP)^1
• Stabilization PR

Unresolved Questions

• Spelling of function (unspecified_from vs to_unspecified vs something else), and whether we allow the function to take (&self) instead of (this: Self).
• How should the flowinfo and scope_id fields of SocketAddrV6 be handled - inherited or zeroed?

Start by reading the core::net API and the implementation referenced as #160905. Review the unresolved questions about the function spelling, receiver form, and SocketAddrV6 flowinfo and scope_id handling; this tracking issue is done when those questions are resolved and the remaining FCP and stabilization steps are complete.