Using nameof syntax leads to parse errors

Describe the bug

The code examples on the nameof page lead to parse errors.

Standalone code, or other way to reproduce the problem

class B {}
class C extends B {}
trait T {
    require extends B;
    public static function f(): void {
        var_dump(nameof T); // "T"
        var_dump(nameof self); // "D" (user of trait)
        var_dump(nameof parent); // "C" (parent of trait user, not B)
        var_dump(nameof static); // "E", receiver for ::f() in main
    }
}
class D extends C { use T; }
class E extends D {}

<<__EntryPoint>>
function main(): void {
  E::f();
}

Steps to reproduce the behavior:

Copy-paste the above code in tmp.hack and run hhvm tmp.hack. I tested with the Docker container

Expected behavior

Code should run (or at least parse) properly.

Actual behavior

Fatal error: Encountered unexpected token `T`. in /home/tmp.hack on line 6

Environment

Operating system: macOS Sonoma 14.2.1
Installation method: Docker hhvm/hhvm:latest with sha256:1cc1be0d469a378114112096431145c9fe80612c61ba48e8697097d933147f60
HHVM Version

HipHop VM 4.172.0 (rel) (non-lowptr)
Compiler: 1667340154_989010953
Repo schema: 63eaf8b56fb7edbc7a8ca9e32786eb0c1f8f508c

Additional context

We're trying to add support for Hack syntax highlighting in Sourcegraph here: https://github.com/sourcegraph/sourcegraph/pull/62770 and were going through the official docs for code examples.

facebook / hhvm

Using nameof syntax leads to parse errors #9447