modular/modular

[Feature Request] [stdlib] Prettier `SIMD` scalar printing

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#5,838 opened on Jan 24, 2026

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 (4 comments) (3 reactions) (0 assignees)Mojo (2,832 forks)github user discovery
enhancementgood first issuemojomojo-stdlib

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Description

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What is your request?

After the change making UInt an alias for Scalar[DType.uindex] printing any collection of UInt gives e.g. [SIMD[DType.uindex, 1](1), ...]. I think we should make the printing of scalars use the aliases that we have, since IMO this introduces too much visual noise when debugging for no apparent benefit beyond making a parser for this a bit simpler. IMO it's a change that will be worth it.

What is your motivation for this change?

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Any other details?

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Contributor guide

Research direction
Locate the SIMD printing code in the standard library and update it to use the UInt alias for scalar types.
Tech stack
None
Domain
developer experience
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
None
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75