PHP8: Nullsafe operator support

[Wulfheart]

#486

[czosel]

Currently, we're parsing $foo->bar as

      {
        "kind": "propertylookup",
        "loc": { ... },
        "what": {
          "kind": "variable",
          "loc": {...},
          "name": "foo",
          "curly": false
        },
        "offset": {
          "kind": "identifier",
          "loc": { ... },
          "name": "bar"
        }
      }

PHP-Parser is parsing $foo?->bar as

0: Stmt_Expression(
       expr: Expr_NullsafePropertyFetch(
           var: Expr_Variable(
               name: foo
           )
           name: Identifier(
               name: bar
           )
       )
   )

I'd say we can implement this here using kind: "nullsafepropertylookup".
cc @ichiriac

[ichiriac]

https://wiki.php.net/rfc/nullsafe_operator
@czosel 👍

[alexander-akait]

Fixed in php8 branch