fix: narrow flatten() type#21
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delacry merged 1 commit intoJul 25, 2026
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Oh, so you fixed it 😄 I just created issue few minutes ago #25 because I saw a comment in some of your previous PR regarding the |
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Jul 25, 2026
Update the API reference for narrowing that landed in #15, #17, #18, #19, #21 and #22: flatten(), filterNotNull(), Map::filterValuesNotNull(), countWhere(), Collection::sum() and Map::toArray(). Compact types are inlined in the signature (countWhere(): int<0, max>); conditional ones are described in prose instead, matching how sum() and intersect() are already documented. Also fix the flatten() assertion in TransformTypeTest, which still expected Collection<mixed> and has failed on 0.1.x since #21.
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if the type of the "sub-items" is known, then
flatten()can return something more precise thanCollection<mixed>