IteratorRandom::sample: allow large "amount"#1695
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dhardy merged 2 commits intorust-random:masterfrom Dec 28, 2025
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From a look at the |
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Yes, I think we should just avoid guessing capacity, because in many cases iterator should provide lower bound, and when it is not, we will do a few reallocations, not a big deal. I updated the PR. |
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Summary
When requested amount is large but, but iterator is small, avoid allocating too large vec.
Motivation
If there's wrapper of such API (e.g. remote API), and it has parameter "sample size", because it is external API, user may pass very large value there, and if a user does that, it is better not to crash.
Details
This change is no-op where iterator lower bound is equal to iterator size.
CHANGELOG.mdentry