The new std.process is ready for review
Steven Schveighoffer
schveiguy at yahoo.com
Tue Mar 12 07:09:56 PDT 2013
On Tue, 12 Mar 2013 05:13:59 -0400, Vladimir Panteleev
<vladimir at thecybershadow.net> wrote:
> On Tuesday, 12 March 2013 at 08:58:13 UTC, Lars T. Kyllingstad wrote:
>> For AAs, 'in' returns a pointer to the element, which is null if the
>> element does not exist. I can't think of a good way to implement
>> this. Since we have to convert the raw environment variable to a D
>> string anyways, we'd have to do something like:
>>
>> string* opIn_r(string var)
>> {
>> auto val = get(var);
>> if (val is null) return null;
>> else return [val].ptr;
>> }
>>
>> but that seems rather pointless to me.
>
> Yes. That use of the "is" operator is mainly to allow updating the value
you meant "in", not "is", right?
> without looking up the key twice. This behavior could be implemented
> using a proxy object, but this is not what I was talking about. I meant
> the specific case of "if (key in environment)".
I think Valdimir wants to have opIn_r return bool?
-Steve
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