Improve count on list with greater/smaller-than#4507
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staabm wants to merge 11 commits intophpstan:2.1.xfrom
Draft
Improve count on list with greater/smaller-than#4507staabm wants to merge 11 commits intophpstan:2.1.xfrom
staabm wants to merge 11 commits intophpstan:2.1.xfrom
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staabm
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Oct 31, 2025
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staabm
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Dec 6, 2025
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| $intersection = []; | ||
| $intersection[] = $arrayType; | ||
| $intersection[] = new NonEmptyArrayType(); | ||
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| $zero = new ConstantIntegerType(0); | ||
| $i = 0; | ||
| foreach ($builderData as [$offsetType, $valueType]) { | ||
| // non-empty-list already implies the offset 0 | ||
| if ($zero->isSuperTypeOf($offsetType)->yes()) { | ||
| continue; | ||
| } | ||
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| if ($i > self::MAX_ACCESSORIES_LIMIT) { | ||
| break; | ||
| } | ||
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| $intersection[] = new HasOffsetValueType($offsetType, $valueType); | ||
| $i++; | ||
| } | ||
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| $resultTypes[] = TypeCombinator::intersect(...$intersection); |
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could also use a AccessoryArraySize, but this likely would be more involved and require a bigger refactor.
therefore I went with this simple approach which covers most useful use-cases
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closes phpstan/phpstan#13747
fixes ~55x "offset might not exist" errors on phpstan-src with
reportPossiblyNonexistentGeneralArrayOffset: true