On Saturday, 28 October 2017 at 11:38:52 UTC, Andrei Alexandrescu
wrote:
Walter and I decided to kick-off project Elvis for adding the
homonym operator to D.
I'd like to mention null-coalescing assignment syntax. Perl has
`$a //= $b`, and PHP has voted to support `$a ??= $b`, expanding
to `$a = $a ?? $b`. Rationale:
// The following lines are doing the same
$this->request->data['comments']['user_id'] =
$this->request->data['comments']['user_id'] ?? 'value';
// Instead of repeating variables with long names, the equal
coalesce operator is used
$this->request->data['comments']['user_id'] ??= 'value';
https://wiki.php.net/rfc/null_coalesce_equal_operator
I expect D could do the same with `a ?:= b` or use the `??`
operator syntax.
Just from memory, I think I would use null coalescing assignments
more than null coalescing comparisons.
