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rvf-index uses `std`-only float methods without feature gate

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
76/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Active
Tech stack
rust
Domain
backend, embedded-iot

Research direction

Read crates/rvf/rvf-index/src/lib.rs to understand its conditional no_std support, then inspect the cited float methods in crates/rvf/rvf-index/src/distance.rs and crates/rvf/rvf-index/src/hnsw.rs. Run the crate's no_std build or check for a bare-metal target; done means these sqrt, ln, and floor uses no longer prevent compilation without std.

Written by the indexing model from the issue text.

Description

The rvf-index supports no_std conditionally:
https://github.com/ruvnet/RuVector/blob/5356a84e2f784a33fa497da2e73440d469eb5542/crates/rvf/rvf-index/src/lib.rs#L9

However it uses f32::sqrt, which is only available with std, without feature gate:
https://github.com/ruvnet/RuVector/blob/5356a84e2f784a33fa497da2e73440d469eb5542/crates/rvf/rvf-index/src/distance.rs#L40

It also uses f64::ln, which is only available with std, without feature gate:
https://github.com/ruvnet/RuVector/blob/5356a84e2f784a33fa497da2e73440d469eb5542/crates/rvf/rvf-index/src/hnsw.rs#L166
https://github.com/ruvnet/RuVector/blob/5356a84e2f784a33fa497da2e73440d469eb5542/crates/rvf/rvf-index/src/hnsw.rs#L174

It also uses f64::floor, which is only available with std, without feature gate:
https://github.com/ruvnet/RuVector/blob/5356a84e2f784a33fa497da2e73440d469eb5542/crates/rvf/rvf-index/src/hnsw.rs#L174

This breaks no_std builds and prevents compilation on bare-metal or other no_std-only targets.

Dominant language
Rust
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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