September 19, 2012
Some time ago I've asked on SO why most languages have `0` prefix for octal numbers. My opinion is the same as D designers that it cause a lot of bugs, but why octal numbers are avaible only by using `std.conv.octal`?
September 19, 2012
On Wednesday, 19 September 2012 at 16:02:41 UTC, Hauleth wrote:
> Some time ago I've asked on SO why most languages have `0` prefix for octal numbers. My opinion is the same as D designers that it cause a lot of bugs, but why octal numbers are avaible only by using `std.conv.octal`?

How often do you use octal numbers? The reason is simply to avoid language feature creep where a library solution is perfectly acceptable.

David
September 19, 2012
On Wednesday, 19 September 2012 at 16:02:41 UTC, Hauleth wrote:
> Some time ago I've asked on SO why most languages have `0` prefix for octal numbers. My opinion is the same as D designers that it cause a lot of bugs, but why octal numbers are avaible only by using `std.conv.octal`?

AFAIK: It is experimental. "The $(D octal) facility is intended as an experimental facility to replace _octal literals starting with $(D '0'), which many find confusing."

The reason for deprecating "0" prefix was indeed because of bugs. Then it was noticed that a library solution was available, and as a rule of thumb, if the library can do it, it is moved from the language to the library.

You'll see a lot of threads talking about "scope", which went the same way (which is now a library feature, not a language feature).

IMO, deprecating "0765" was a good move. Personally, I'd rather have had "0o765" instead of "octal!765" (if only for highlighting). But I don't think it is a big deal.
September 20, 2012
On Wed, 19 Sep 2012 12:15:19 -0400, monarch_dodra <monarchdodra@gmail.com> wrote:

> On Wednesday, 19 September 2012 at 16:02:41 UTC, Hauleth wrote:
>> Some time ago I've asked on SO why most languages have `0` prefix for octal numbers. My opinion is the same as D designers that it cause a lot of bugs, but why octal numbers are avaible only by using `std.conv.octal`?
>
> AFAIK: It is experimental. "The $(D octal) facility is intended as an experimental facility to replace _octal literals starting with $(D '0'), which many find confusing."

That comment is very old.  It is no longer experimental.

If you want an explanation, see here:

http://www.drdobbs.com/tools/user-defined-literals-in-the-d-programmi/229401068

-Steve
September 20, 2012
On Thursday, 20 September 2012 at 18:12:50 UTC, Steven Schveighoffer wrote:
> On Wed, 19 Sep 2012 12:15:19 -0400, monarch_dodra <monarchdodra@gmail.com> wrote:
>
>> On Wednesday, 19 September 2012 at 16:02:41 UTC, Hauleth wrote:
>>> Some time ago I've asked on SO why most languages have `0` prefix for octal numbers. My opinion is the same as D designers that it cause a lot of bugs, but why octal numbers are avaible only by using `std.conv.octal`?
>>
>> AFAIK: It is experimental. "The $(D octal) facility is intended as an experimental facility to replace _octal literals starting with $(D '0'), which many find confusing."
>
> That comment is very old.  It is no longer experimental.
>
> If you want an explanation, see here:
>
> http://www.drdobbs.com/tools/user-defined-literals-in-the-d-programmi/229401068
>
> -Steve

Very interesting read. TY.
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