feat: add Psl\Type\nullish() return type provider#18
Merged
azjezz merged 2 commits intophp-standard-library:mainfrom Mar 16, 2026
Merged
feat: add Psl\Type\nullish() return type provider#18azjezz merged 2 commits intophp-standard-library:mainfrom
Psl\Type\nullish() return type provider#18azjezz merged 2 commits intophp-standard-library:mainfrom
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Infers T|null for Psl\Type\nullish($type) calls, mirroring the existing optional() provider but combining with null instead of setting possibly-undefined.
Remove dead TNonEmptyList branches from Iter handlers. This type was removed from Psalm and is now represented as TKeyedArray (is_list) or TNonEmptyArray, both of which are already handled. Suppress UnusedClass on Plugin (loaded externally by Psalm).
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azjezz
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Psl\Type\nullish() return type provider
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Summary
Psl\Type\nullish()that infersT|nullby combining the argument type withnullviaType::combineUnionTypes()TNonEmptyListbranches from Iter handlers (type was removed from Psalm, now represented asTKeyedArray/TNonEmptyArraywhich are already handled)UnusedClassonPlugin(loaded externally by Psalm)Test plan
optional()pattern