Re: Bitwise Declaration of Flags

Don't you mean it's NOT valid syntax? Derick Rethans wrote:

On Sun, 27 Sep 2009, jvlad wrote:

This is not allowed since declaration values should be resolvable at compile time. I.e. they can not be an expression, but only a value literal. While technically expression folding is possible, it's not implemented in any part of the PHP engine (AFAIK), and I don't think it's planned any time soon. To do what you want, initialize the value in the constructor: class foo { ... private $flags; function __construct() {

       $this->flags = self::FLAG_1 | self::FLAG_3;

} }

ok, and could you please point out to the thing in self::FLAG_1 that is unresolveable at compile-time?

The following is also valid syntax: class foo { private $Flags = self::FLAG_1 | self::FLAG_3 const FLAG_1 = 1; const FLAG_2 = 2; const FLAG_3 = 4; } When the compiler hits self::FLAG_1 here, it's not yet defined. Derick