Keep NeverType isExplicit-flag in TypeCombinator::intersect() #2112
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staabm
commented
Dec 14, 2022
| @@ -946,7 +946,7 @@ public static function intersect(Type ...$types): Type | |||
| $valueType = $types[$j]->getValueType(); | |||
| $newValueType = self::intersect($types[$i]->getOffsetValueType($offsetType), $valueType); | |||
| if ($newValueType instanceof NeverType) { | |||
| return new NeverType(); | |||
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these lines dropped the explicitness flag before this PR
staabm
commented
Dec 14, 2022
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| [ | ||
| [ | ||
| new NeverType(true), | ||
| new IntegerType(), | ||
| ], | ||
| NeverType::class, | ||
| '*NEVER*=explicit', | ||
| ], |
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here we have a test which now returns a explicit NeverType. all other tests where adjusted to compensate the additional implicit information in the description. no changes regarding the typtes itself.
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Thank you! |
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inspired by #2110 where we addd logic based on NeverType explicitness, I figured it would be helpful if the TypeCombinator would keep the exlicitness, instead of create a new non-explicit NeverType every-time it combines NeverTypes'.
Before this PR there was no way to differentiate between NeverType explicit and implicit - I therefore added the same "hack" we use to differentiate explicit and implicit MixedType in tests.
this could be followed up by changes in e.g.
phpstan-src/src/Reflection/InitializerExprTypeResolver.php
Lines 500 to 502 in b76e7b1
InitializerExprTypeResolverwith this pattern)