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Date: Fri, 3 Feb 2017 18:25:59 -0600
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To: ilija.tovilo@me.com
Subject: Re: [PHP-DEV] [RFC][Discuss] Arrow Functions
From: aaron@trowski.com (Aaron Piotrowski)


> On Feb 3, 2017, at 2:34 PM, ilija.tovilo@me.com wrote:
>=20
> I like the suggested syntax. The only drawback I see is that it =
inhibits the future addition of union types for closures:
>=20
>     |int | float $x| =3D> $x
>=20
> Adding parentheses of course resolves the issue but looks a bit =
awkward:
>=20
>     |(int | float) $x| =3D> $x
>=20
> Apart from that I have nothing to complain about. I'd be happy either =
way.
>=20


While it may be ugly, I do not believe that this has any ambiguity.

    $callback =3D |int|float $x| =3D> $x ** 2;

When the second | is not followed by =3D>, the parser should be able to =
discern that a union type is being used.

Regards, Aaron Piotrowski=