+1 for this proposal.
By the way, maybe it's a better idea to split these changes into small
patcher rather than a big one so that we can review them one by one.

On Tue, Feb 26, 2019 at 8:58 AM Steven Fackler (JIRA) <j...@apache.org>
wrote:

> Steven Fackler created ARROW-4678:
> -------------------------------------
>
>              Summary: [Rust] Minimize unstable feature usage
>                  Key: ARROW-4678
>                  URL: https://issues.apache.org/jira/browse/ARROW-4678
>              Project: Apache Arrow
>           Issue Type: Improvement
>           Components: Rust
>     Affects Versions: 0.12.0
>             Reporter: Steven Fackler
>
>
> The Rust implementation currently uses quite a few nightly features. This
> is unfortunately a hard blocker on using these crates for many users.
>
> Here's the list of currently use nightly features:
>  * type_ascription: Unused, can be trivially removed.
>  * rustc_private: Unused, can be trivially removed.
>  * box_syntax: Indefinitely far from stabilization, trivially replaceable
> with Box::new.
>  * box_patterns: Indefinitely far from stabilization, replaceable with
> some minor restructuring of a couple of matches.
>  * serde's alloc feature: Unused, can be trivially removed.
>  * try_from: Scheduled for stabilization in Rust 1.35.
>  * specialization: Actively being worked on - maybe ~1 year timeframe?
>  * packed_simd: Actively being worked on - maybe ~1 year timeframe?
>
> The first set of features are easy enough to get rid of - I'll make a PR
> to do that (https://github.com/sfackler/arrow/tree/more-stable). I'm a
> bit less sure of what to do with specialization and packed_simd, though.
>
>
>
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-- 
Renjie Liu
Software Engineer, MVAD

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