Fixed axis length support similiar to `Eigen`
Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 25/100
- Issue type
- Feature
- Clarity
- Needs clarification
- Activity status
- Stale
- Tech stack
- rust
- Domain
- data, performance
Research direction
Start by reviewing the Dimension and ArrayRepr traits, including the possible Data refactor, and the FixedIx2 design described in the issue. Check the constraints around const_evaluatable_checked, specialization, and mixing fixed and dynamic axes; done would require an agreed design and implementation plan for fixed axis lengths.
Written by the indexing model from the issue text.
Description
In Eigen, We can write Matrix<float, 4, 4> to represent a matrix with fixed 4x4 size. In Rust, I would imaging syntax similar to ArrayBase<Array2Repr<T, 4, 4>, FixedIx2<4, 4>>, which has no allocation, const bound check and enable better simd instructions.
I can see several difficulty implementing this:
Dimensiontrait currently requiresAdd/Sub/Mul, which doesn't make sense in fixed length.ArrayReprrequires exact generic argument match toFixedIx2. This might requires refactor toDataorDimensiontraits.- Enable better simd instructions on specific axis length might require
#[feature(const_evaluatable_checked)]and#[feature(specialization)], and both of them are incomplete feature. - Mixing fixed axis length and dynamic axis length in one matrix seems hard.
- Dominant language
- Rust
- Stars
- 4.3k
- Forks
- 391
- PR merge metrics
- No merged PRs in 30d
Contributor guide
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First steps
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- Open a pull request that references the issue number.
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