Squiz.Objects.ObjectInstantiation: null coalesce operators are not recognized as assignment

[KacerCZ]

Describe the bug
Sniff Squiz.Objects.ObjectInstantiation does not recognizes ?? and ??= operators as assignment.

Code sample

$time1 = new \DateTime();
$time2 ??= new \DateTime();
$time3 = $time1 ?? new \DateTime();

Custom ruleset

<?xml version="1.0"?>
<ruleset name="My Custom Standard">
  <rule ref="Squiz.Objects.ObjectInstantiation" />
</ruleset>

To reproduce
Steps to reproduce the behavior:

1. Create a file called test.php with the code sample above...
2. Run phpcs test.php ...
3. See error message displayed

----------------------------------------------------------------------
FOUND 2 ERRORS AFFECTING 2 LINES
----------------------------------------------------------------------
 4 | ERROR | New objects must be assigned to a variable
 5 | ERROR | New objects must be assigned to a variable

Expected behavior
Error Squiz.Objects.ObjectInstantiation.NotAssigned is not reported for any of the lines.

Versions (please complete the following information):

• OS: Ubuntu Linux 20.10
• PHP: 8.0.5
• PHPCS: 3.6.0
• Standard: custom

[jrfnl]

Thanks for reporting this @KacerCZ . PR #3348 should fix this. Testing appreciated.

[KacerCZ]

@jrfnl Today I tested your fix and it works. Thank you.

[jrfnl]

@KacerCZ Thanks for testing & confirming the fix.