Re: Arrow function expressions in PHP

On 26/09/2015 19:37, Levi Morrison wrote:

Thank you for the feedback. I feel like the rest of what you proposed was a bit too far outside of the box. For what it is worth no token after the paren is necessary – you could do fn($x) $x * 2 (or function($x) $x * 2). I think this is a case where more syntax helps.

Here they are on separate lines so you can see things more clearly:

     $output = array_map(function($x) $x * 2, $input);

     $output = array_map(function($x) => $x * 2, $input);

I think the arrow helps.

I meant more that the lack of parens around the whole expression looks odd - the => is no longer just an operator linking two expressions, it's an arbitrary piece of syntax inserted just because it feels like something should go there (and I agree it does look more readable than nothing at all). How about a variant on existing curly braces: fn($x) { $x * 2 } lambda($x) { $x * 2 } Or the arrow inside the parens: fn($x => $x * 2) function($x => $x * 2) My point is that there are plenty of other variants, if we're no longer mimicking the "(params) => expression" syntax of other languages. Regards, -- Rowan Collins [IMSoP]