File: vendor/wp-coding-standards/wpcs/WordPress/Docs/WhiteSpace/ObjectOperatorSpacingStandard.xml

<documentation title="Object Operator Spacing">
    <standard>
    <![CDATA[
    The object operators (->, ?->, ::) should not have any spaces around them, though new lines are allowed except for use with the `::class` constant.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: No spaces around the object operator.">
        <![CDATA[
$foo<em></em>-><em></em>bar();
        ]]>
        </code>
        <code title="Invalid: Whitespace surrounding the object operator.">
        <![CDATA[
$foo<em>  </em>?-><em>  </em>bar();
        ]]>
        </code>
    </code_comparison>
</documentation>