Re: [RFC] Constant Scalar Expressions

Am 13.08.2013 um 14:13 schrieb "Anthony Ferrara" <ircmaxell@gmail.com>: > Hello all, > > I'd like to propose a new RFC for 5.NEXT: > > https://wiki.php.net/rfc/const_scalar_expressions > > This allows for defining constant expressions which are resolved at compile > time. > > for example: > > const FOO = 1 + 1; > static $bar = 1 << 2; > function foo($a = 1 | 2) {} > class foo { > public $bar = 1 << 2; > } > > Thoughts? > > Anthony It really would be nice to use constants in these constant expressions. I think this would be particulary useful when using bitwise operators. Example: const FLAG_A = 1; const FLAG_B = 2; const FLAG_C = 4; With this proposal we would write: function func ($arg = 1 | 2 | 4) # we now need to lookup first which constants have values 1, 2 and 4 But it would be much more understandable if we were able to write: function func ($arg = FLAG_A | FLAG_B | FLAG_C) Bob Weinand