Cannot use literal @ sign in PHP expressions

[julienfalque]

I have an issue that is similar to what #516 (comment) reported: when I use a literal @ sign in a PHP expression, it is always parsed as a reference, e.g.:

<(new App\Email('foo@bar.baz'))>

and

<(new App\Email('foo\@bar.baz'))>

both result in trying to eval the following PHP code:

new App\Email('foo\$_instances['bar.baz')']

which produces a syntax error.

The only workaround I found is to replace @ with \x40 (in a double quoted string).