There's already been an overwhelming negative reaction to this
particular proposed syntax so I won't belabor the point much. In
short, this is too similar to block statements and does have BC
issues.
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IF (and I stress if) we add a a shorter anonymous function syntax I'd
like it to be geared towards one-liners because that's where the
current syntax feels really verbose, especially when you close over
other variables:
function ($n) use ($m) { return $m * $n; }
Versus one potential option:
($value) |$m| => $m * $n;
This syntax is short and expressive at the expense of clarity.
Basically all short-syntax has that trade-off, so I am personally fine
with it. The only other potential problem I see is parsing it; someone
more familiar with PHP's parser would have to verify whether that
would be a problem.
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