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October 16, 2012 alias A = B; syntax | ||||
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For me syntax alias int Int; seems unnatural. I'd love to write alias Int = int; alias fptr = void(int)*; This looks much more readable for me and harmonized with int x = 0; template T(alias A = Object) {...} Does anybody share this opinion? Any chance this syntax goes into D someday? |
October 16, 2012 Re: alias A = B; syntax | ||||
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Posted in reply to stas | stas:
> Does anybody share this opinion?
> Any chance this syntax goes into D someday?
You are not the first one to suggest similar ideas :-)
I think the general answer is: "Not big enough improvement to justify a language change". But I agree your syntax is better. Maybe it's too much late to change it now.
Bye,
bearophile
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October 16, 2012 Re: alias A = B; syntax | ||||
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Posted in reply to stas | On Tue, 16 Oct 2012 05:00:56 +0200
"stas" <stasoid@yahoo.com> wrote:
> For me syntax alias int Int; seems unnatural.
> I'd love to write
> alias Int = int;
> alias fptr = void(int)*;
>
> This looks much more readable for me and harmonized with
> int x = 0;
> template T(alias A = Object) {...}
>
> Does anybody share this opinion?
> Any chance this syntax goes into D someday?
I'm pretty sure it was already decided that this would be added, but just hasn't made it in yet. I've been fairly eager for it. I find the current syntax too inconsistent and confusing.
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October 16, 2012 Re: alias A = B; syntax | ||||
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Posted in reply to Nick Sabalausky | On 10/16/12, Nick Sabalausky <SeeWebsiteToContactMe@semitwist.com> wrote: > I'm pretty sure it was already decided that this would be added, but just hasn't made it in yet. I've been fairly eager for it. I find the current syntax too inconsistent and confusing. Yep. Paging Dr. Kenji! |
October 16, 2012 Re: alias A = B; syntax | ||||
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Posted in reply to Nick Sabalausky | Am Mon, 15 Oct 2012 23:18:33 -0400 schrieb Nick Sabalausky <SeeWebsiteToContactMe@semitwist.com>: > On Tue, 16 Oct 2012 05:00:56 +0200 > "stas" <stasoid@yahoo.com> wrote: > > > Does anybody share this opinion? > > Any chance this syntax goes into D someday? > > I'm pretty sure it was already decided that this would be added, but just hasn't made it in yet. I've been fairly eager for it. I find the current syntax too inconsistent and confusing. > Just recently I wondered how the current syntax could possibly have come into existence. >) -- Marco |
October 16, 2012 Re: alias A = B; syntax | ||||
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Posted in reply to Nick Sabalausky | On Monday, October 15, 2012 23:18:33 Nick Sabalausky wrote:
> I'm pretty sure it was already decided that this would be added, but just hasn't made it in yet.
We'd have to dig through the newsgroup archives to be sure on that one. I'm pretty sure that it _wasn't_ decided that we'd add it, but I don't know for sure. But I don't think that it was entirely shot down either.
Personally, I'm so used to the current syntax at this point that I don't much care, and we'd have to add the new syntax on top of the current one (it would break too much code otherwise), which would arguably just complicate the language further. But it's certainly true that plenty of folks would prefer a syntax similar to assignment instead of the current syntax.
- Jonathan M Davis
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October 16, 2012 Re: alias A = B; syntax | ||||
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Posted in reply to Marco Leise | On Tuesday, October 16, 2012 06:08:27 Marco Leise wrote:
> Just recently I wondered how the current syntax could possibly have come into existence. >)
It's the same as C's typedef syntax.
- Jonathn M Davis
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October 16, 2012 Re: alias A = B; syntax | ||||
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On 10/16/12, Jonathan M Davis <jmdavisProg@gmx.com> wrote:
> We'd have to dig through the newsgroup archives
Nah just ask Andrei he already confirmed this once.
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October 16, 2012 Re: alias A = B; syntax | ||||
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Posted in reply to Jonathan M Davis | On Tuesday, 16 October 2012 at 04:32:29 UTC, Jonathan M Davis wrote:
> On Tuesday, October 16, 2012 06:08:27 Marco Leise wrote:
>> Just recently I wondered how the current syntax could possibly
>> have come into existence. >)
>
> It's the same as C's typedef syntax.
>
> - Jonathn M Davis
Alias is not the same thing as C's typedef, but I understand it originally evolved out that way from C's version of typedef.
I agree that the current syntax does at first seem inconsistent with most other things in the language, and I found myself typing it in reverse with the = when I first tried using it, eg
alias Int = int;
On the other hand, I could argue that variable declarations are also inconsistent in the same way, eg
int i; // the "declare" keyword is implied
instead of
declare i = int;
So
alias int Int;
is indeed rather consistent with how type declarations are currently done. Unfortunately, inconsistencies create needless waste, but fixing something like that may be not worth the gain once it becomes deeply rooted in the language.
It may not be to late to change the syntax for alias definitions, but the type declarations will no doubt remain as they are, and the rest of it that is the reverse of type declarations will also likely remain as they are.
--rt
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October 16, 2012 Re: alias A = B; syntax | ||||
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Posted in reply to Rob T | On Tuesday, October 16, 2012 07:17:54 Rob T wrote:
> On Tuesday, 16 October 2012 at 04:32:29 UTC, Jonathan M Davis
>
> wrote:
> > On Tuesday, October 16, 2012 06:08:27 Marco Leise wrote:
> >> Just recently I wondered how the current syntax could possibly have come into existence. >)
> >
> > It's the same as C's typedef syntax.
> >
> > - Jonathn M Davis
>
> Alias is not the same thing as C's typedef, but I understand it originally evolved out that way from C's version of typedef.
The syntax is identical except for it being "alias" rather than "typedef" and their usage is near identical. C/C++ will allow you to typedef struct declarations instead of just their name
typedef struct {...} name;
which D won't let you do, and D will let you alias any symbol, whereas C/C++'s typedef only works on types. But since neither actually declares a new type, I'm unaware of any real difference between the two other than those I already mentioned. They're pretty much the same thing, so I don't know why you're saying that they're different.
Regardless, my point was that the syntax was the same and so that's where alias' syntax comes from.
- Jonathan M Davis
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