On Tue, May 18, 2021 at 2:45 PM Larry Garfield <[email protected]>
wrote:
> User-space functions have always accepted more arguments than they're
> defined with. They just get dropped off the end silently, unless you use
> func_get_args() or variadics. While I know not everyone likes that
> "feature", it means that extra trailing ? "arguments" don't feel weird to
> me. They just get dropped off the end and we move on with life. At least
> that's how I conceptualize them.
>
This is my question about the partials feature, though; does the
implementation have potential to reasonably be confusing? if it's
essentially a convenient way of creating a closure, why would extra
arguments passed in the closure call be passed to the wrapped function,
rather than discarded?
function foo(int $a, int $b, int ...$p) { ... }
$partial = foo(?, 10);
$partial(5, 15, 25);
Intuitively, because the existing convention is extra unused parameters in
user defined functions are silently ignored, I think I would expect the
above to be equivalent to something like:
$partial = fn(int $a) => foo($a, 10);
$partial(5, 15, 25); // 15 and 25 are lopped off to no effect
and not
$partial = fn(int $a, int ...$params) => foo($a, 10, ....$params);
But correct me if I'm wrong, isn't the latter what the RFC effectively
proposes?
>
> --Larry Garfield
>
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