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allow $isOffsetAccessible->maybe() for isUndefinedExpressionAllowed and isSpecified expression #1312

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merged 8 commits into from
May 18, 2022
Merged

allow $isOffsetAccessible->maybe() for isUndefinedExpressionAllowed and isSpecified expression #1312

merged 8 commits into from
May 18, 2022

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rajyan
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@rajyan rajyan commented May 14, 2022 •
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@rajyan rajyan changed the title allow !$isOffsetAccessible->yes() for isUndefinedExpressionAllowed … allow $isOffsetAccessible->maybe() for isUndefinedExpressionAllowed and isSpecified expression May 14, 2022
@rajyan rajyan marked this pull request as ready for review May 14, 2022 00:56
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rajyan commented May 14, 2022 •
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I'm not sure enough for what this test is intended to do, so cannot change it yet. c36df00

I think I understood it.

staabm
staabm reviewed May 14, 2022
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tests/PHPStan/Levels/data/arrayDimFetches.php
@@ -55,7 +55,7 @@ public function doBaz($a, $b): void
*/
public function iterableOffset($iterable): void
{
unset($iterable['foo']);
var_dump($iterable['foo']);
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Leftover Debug output?

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No, I just wanted to change this line to some kind of function call that doesn’t cause isUndefinedExpressionAllowed === true (that means something except isset, unset, empty)

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Please add new code instead of changing existing tests :) Thanks.

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rajyan commented May 15, 2022 •
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@ondrejmirtes
Sorry for lack of explanation.
The purpose of this pull request is to make isUndefinedExpressionAllowed === true && $isOffsetAccessible->maybe() and isSpecified === true && $isOffsetAccessible->maybe() which is a kind of breaking change in some cases so we need some fix in tests too (see aeb00d9).

This change can make
https://phpstan.org/r/ea075526-a29b-428a-a5f7-39b90266a2f8

this code not report, and I believe this shouldn't be reported because this is a valid PHP code.

#1312 (comment)

unset is also a method that causes isUndefinedExpressionAllowed === true so the result for this test changes.
c36df00
Looking at this commit I thought that unset was not important here, because the intention of this test was to test reportMaybes for level 7 and unset isn't related. This is why I had to change the existing test.

Although, I remembered now this issue phpstan/phpstan#7073 and noticed that I have to be careful for array access on object type (because it is a fatal error) and this PR needs some modification anyway.

@rajyan rajyan marked this pull request as draft May 15, 2022 13:36
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All of that is totally fine, I just want both unset and var_dump tested in that file. It's OK if the error for unset() changes/disappears.

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rajyan commented May 15, 2022

I see, thanks.
I’ll mark this ready after fixing that and fixing problems about object type.
Thank you very much for reviewing!

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rajyan commented May 18, 2022

https://3v4l.org/HrulF
Memo for canAccessProperties and isOffsetAccessible.

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rajyan commented May 18, 2022 •
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@ondrejmirtes
I'll mark this ready.

I will implement a more strict behavior for canAccessProperties and isOffsetAccessible maybes under isUndefinedExpressionAllowed === true in another pull request using the result of https://3v4l.org/HrulF

memo
php/php-src@008bfcc

@rajyan rajyan marked this pull request as ready for review May 18, 2022 00:45
@ondrejmirtes ondrejmirtes merged commit 28f4503 into phpstan:1.7.x May 18, 2022
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Thank you!

@rajyan rajyan deleted the fix/issue-7229 branch November 17, 2022 23:53
@rajyan rajyan mentioned this pull request Nov 17, 2022
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@rajyan @ondrejmirtes @staabm