rust-lang / rust-lang/rust

Tracking Issue for `exp2_m1` and `log2p1` on floats

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C-tracking-issue S-tracking-unimplemented T-libs
Dominant language
Rust
Stars
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Forks
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PR merge metrics
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Description

Feature gate: #![feature(<name TBD>)]

This is a tracking issue for exp2_m1 and log2_p1; i.e. float functions for computing 2x - 1, and log2(x+1) respectively.

Public API
impl f*{
    fn exp2_m1(self) -> f*;
    fn log2_p1(self) -> f*;
}
Steps / History

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

  • ACP: rust-lang/libs-team#760
  • Implementation: #...
  • Final comment period (FCP)^1
  • Stabilization PR
Unresolved Questions
  • How should the functions actually be implemented?

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the public API proposal for exp2_m1 and log2_p1, then read the linked ACP at rust-lang/libs-team#760. The unresolved implementation question must be answered before the tracking checklist can advance through implementation, FCP, and stabilization.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
backend-api-design
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
30/100

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