Re: Type casting while array destructuring

On Tue, 24 Mar 2020 at 14:28, Reindl Harald <h.reindl@thelounge.net> wrote: > > Am 24.03.20 um 15:23 schrieb Rowan Tommins: > > On the other hand, this is exactly the kind of thing where > strict_types=1 makes things worse - you'll actually get *better* error > output if you use strict_types=0 and pass the string to a function marked > as requiring int > no! > > with strict_types=0 the casting simp,y happens by the caller and you get > no error at all > Only if the string is a valid integer; compare https://3v4l.org/uvPYZ with https://3v4l.org/h1aT5 function foo(int $x) { var_dump($x); } declare(strict_types=1); $a = 'hello'; $a = (int)$a; // cast doesn't produce any errors foo($a); // dumps int(0) declare(strict_types=0); $a = 'hello'; foo($a); // TypeError: Argument 1 passed to foo() must be of the type int, string given That's what I mean about "stricter casting" - (int)$a basically always succeeds, so it would be useful to have a version that rejects things like non-integer strings. That could be Yet Another Runtime Mode using declare(), but it could just be a different syntax, so that you'd write this: // regardless of which strict_types mode you're in $a = 'hello'; $a = (int!)$a; // TypeError: string value is not valid for strict cast to type int foo($a); // statement never reached Regards, -- Rowan Tommins [IMSoP]