Designing a consistent language is *very* hard

[Walter Bright]

On 4/28/2012 11:10 AM, H. S. Teoh wrote:
> But the overload of 'is' as an operator with 'is()' as an expression
> (and its various ugly arbitrarily assigned syntaxes)? WAT.

It's not that unusual for an operator to have a binary form that is totally 
different from its unary form. Like *

> Seriously, one of the first things I'd like to see in D3 is a complete
> overhaul of is(). I say again, the various *semantics* of it are
> extremely useful, and are part of what makes D rock so much. But the
> *syntax* badly needs a total redesign. We need much saner syntax
> assigned to each of the current uses of is(), that doesn't look like it
> was grafted in from a PHP development branch.

I agree that the IsExpression syntax is a bit of a disaster. Eventually we can 
redesign it (D3), but there's no way we have time to do that now.