php-parser/test/code/prettyPrinter/expr/nullsafe.test

Nullsafe operator
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<?php

$a?->b;
$a?->b($c);
$a?->b?->c;
$a?->b($c)?->d;
$a?->b($c)();
new $a?->b;
"{$a?->b}";
"$a?->b";
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!!php7
$a?->b;
$a?->b($c);
$a?->b?->c;
$a?->b($c)?->d;
$a?->b($c)();
new $a?->b();
"{$a?->b}";
"{$a}?->b";