Walter's second axiom

[Daniel Keep]

Jason House wrote:
> Walter Bright wrote:
> 
>> Jason House wrote:
>>> Walter Bright wrote:
>>>> That axiom didn't really exist until Andrei started pointing out to me
>>>> all the advantages of being able to wrap types in a struct. So we can
>>>> expect some historical problems with it.
>>> Can you please share with us all the advantages of "Any type T can be
>>> wrapped inside a struct S, and that S can be made to behave as a typedef
>>> for type T."
>> You might, for example, want to create an associative array that behaved
>> slightly differently, but use it just like an AA.
> 
> .... so even without the const issues, this type of functionality does not
> yet work in D?  As far as I know, AA's are the only thing that support the
> in operator.

opIn_r

Overload and be happy.

	-- Daniel