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January 08, 2013
Official DMD compiler written in D
Now that D 2.0 is fairly stable, are there any plans of writing 
the official DMD compiler with the D 2.0 language vs the present 
language of C++?

DMD 2.0 would have to be feature frozen and then DMD 3.0 could be 
written with the previous DMD 2.0 compiler.

What are your thoughts?
January 08, 2013
Re: Official DMD compiler written in D
On 01/08/2013 10:48 AM, Tim Krimm wrote:
>
> Now that D 2.0 is fairly stable, are there any plans of writing the
> official DMD compiler with the D 2.0 language vs the present language of
> C++?
>
> DMD 2.0 would have to be feature frozen and then DMD 3.0 could be
> written with the previous DMD 2.0 compiler.
>
> What are your thoughts?

There is Denis Koroskin's ddmd:

  http://forum.dlang.org/thread/i4obl3$kgk$1@digitalmars.com?page=1

If this page is up to date, ddmd is currently at dmd 2.040's level:

  http://www.dsource.org/projects/ddmd

Ali
January 08, 2013
Re: Official DMD compiler written in D
On Tue, Jan 8, 2013 at 8:18 PM, Ali Çehreli <acehreli@yahoo.com> wrote:

> On 01/08/2013 10:48 AM, Tim Krimm wrote:
>
>>
>> Now that D 2.0 is fairly stable, are there any plans of writing the
>> official DMD compiler with the D 2.0 language vs the present language of
>> C++?
>>
>> DMD 2.0 would have to be feature frozen and then DMD 3.0 could be
>> written with the previous DMD 2.0 compiler.
>>
>> What are your thoughts?
>>
>
> There is Denis Koroskin's ddmd:
>
>   http://forum.dlang.org/thread/**i4obl3$kgk$1@digitalmars.com?**page=1<http://forum.dlang.org/thread/i4obl3$kgk$1@digitalmars.com?page=1>
>
> If this page is up to date, ddmd is currently at dmd 2.040's level:
>
>   http://www.dsource.org/**projects/ddmd<http://www.dsource.org/projects/ddmd>
>
> Ali
>

Isn't SDC also in D? (Bernard Helyer and friends)
https://github.com/bhelyer/SDC


Also, Timon Gehr spoke of his own front-end (assumed to be in D) in the
past, but did not provide any link to it.


But, to answer the OP question: no, there are no plan to switch to D for
the reference compiler in the near future, as far as I can tell.
January 08, 2013
Re: Official DMD compiler written in D
On Tue, Jan 08, 2013 at 07:48:58PM +0100, Tim Krimm wrote:
> 
> Now that D 2.0 is fairly stable, are there any plans of writing the
> official DMD compiler with the D 2.0 language vs the present
> language of C++?
> 
> DMD 2.0 would have to be feature frozen and then DMD 3.0 could be
> written with the previous DMD 2.0 compiler.
> 
> What are your thoughts?

Philosophically, I like this idea. D should eat its own dogfood to prove
its own worth. :)

However, having the D compiler itself written in D, means we will have
trouble bootstrapping it on new platforms. The advantage of having a C++
implementation is that C/C++ compilers are almost the first thing that
gets implemented on a new platform, so you can almost always count on
their existence. So you can just compile DMD and away you go.

We *could* write a cross-compiler, of course, but it still requires that
you first target the D compiler (written in D) to the new platform, and
then cross-compile itself to that platform.  Whereas with DMD, you just
use the target platform's C++ compiler and you're up and running.


T

-- 
What's a "hot crossed bun"? An angry rabbit.
January 09, 2013
Re: Official DMD compiler written in D
On Tuesday, 8 January 2013 at 21:57:17 UTC, H. S. Teoh wrote:
> On Tue, Jan 08, 2013 at 07:48:58PM +0100, Tim Krimm wrote:
>> 
>> Now that D 2.0 is fairly stable, are there any plans of 
>> writing the
>> official DMD compiler with the D 2.0 language vs the present
>> language of C++?
>> 
>> DMD 2.0 would have to be feature frozen and then DMD 3.0 could 
>> be
>> written with the previous DMD 2.0 compiler.
>> 
>> What are your thoughts?
>
> Philosophically, I like this idea. D should eat its own dogfood 
> to prove
> its own worth. :)
>
> However, having the D compiler itself written in D, means we 
> will have
> trouble bootstrapping it on new platforms. The advantage of 
> having a C++
> implementation is that C/C++ compilers are almost the first 
> thing that
> gets implemented on a new platform, so you can almost always 
> count on
> their existence. So you can just compile DMD and away you go.
>
> We *could* write a cross-compiler, of course, but it still 
> requires that
> you first target the D compiler (written in D) to the new 
> platform, and
> then cross-compile itself to that platform.  Whereas with DMD, 
> you just
> use the target platform's C++ compiler and you're up and 
> running.
>
>
> T

I think the OP implied that we could build DMD2 from its C++ 
source on any platform and then DMD3 from its D source with DMD2.
January 09, 2013
Re: Official DMD compiler written in D
On Tuesday, 8 January 2013 at 21:57:17 UTC, H. S. Teoh wrote:
> We *could* write a cross-compiler, of course, but it still 
> requires that
> you first target the D compiler (written in D) to the new 
> platform, and
> then cross-compile itself to that platform.  Whereas with DMD, 
> you just
> use the target platform's C++ compiler and you're up and 
> running.

…except that you can't actually use that compiler for anything, 
because – wait for it – it still needs to be retargeted for the 
new platform. What kind of new system are you thinking of for 
which the first use case would be compiling x86 executables?

David
January 09, 2013
Re: Official DMD compiler written in D
On Wed, Jan 09, 2013 at 01:33:35AM +0100, David Nadlinger wrote:
> On Tuesday, 8 January 2013 at 21:57:17 UTC, H. S. Teoh wrote:
> >We *could* write a cross-compiler, of course, but it still requires
> >that you first target the D compiler (written in D) to the new
> >platform, and then cross-compile itself to that platform.  Whereas
> >with DMD, you just use the target platform's C++ compiler and you're
> >up and running.
> 
> …except that you can't actually use that compiler for anything,
> because – wait for it – it still needs to be retargeted for the new
> platform. What kind of new system are you thinking of for which the
> first use case would be compiling x86 executables?
[...]

Heh, you're right. I appear to be having a streak of making a fool of
myself today.


T

-- 
Today's society is one of specialization: as you grow, you learn more
and more about less and less. Eventually, you know everything about
nothing.
January 09, 2013
Re: Official DMD compiler written in D
On 01/08/2013 06:38 PM, H. S. Teoh wrote:
> On Wed, Jan 09, 2013 at 01:33:35AM +0100, David Nadlinger wrote:
>> On Tuesday, 8 January 2013 at 21:57:17 UTC, H. S. Teoh wrote:
>>> We *could* write a cross-compiler, of course, but it still requires
>>> that you first target the D compiler (written in D) to the new
>>> platform, and then cross-compile itself to that platform.  Whereas
>>> with DMD, you just use the target platform's C++ compiler and you're
>>> up and running.
>>
>> …except that you can't actually use that compiler for anything,
>> because – wait for it – it still needs to be retargeted for the new
>> platform. What kind of new system are you thinking of for which the
>> first use case would be compiling x86 executables?
> [...]
>
> Heh, you're right. I appear to be having a streak of making a fool of
> myself today.
>
>
> T
>

I'm embarrassed to admit that I didn't understand the problem until I 
read your response...

I love the idea of a D compiler in D.
Walter might have issues with working on any other compiler backend 
other than digitalmars, wasn't that what was determined by previous threads?
January 09, 2013
Re: Official DMD compiler written in D
On 01/08/2013 01:06 PM, Philippe Sigaud wrote:
> On Tue, Jan 8, 2013 at 8:18 PM, Ali Çehreli<acehreli@yahoo.com>  wrote:

>> There is Denis Koroskin's ddmd:

>>    http://www.dsource.org/**projects/ddmd<http://www.dsource.org/projects/ddmd>

> Isn't SDC also in D? (Bernard Helyer and friends)
> https://github.com/bhelyer/SDC

And Aziz Köksal's dil:

  https://github.com/azizk/dil

Ali
January 09, 2013
Re: Official DMD compiler written in D
On Tuesday, 8 January 2013 at 21:57:17 UTC, H. S. Teoh wrote:
> Philosophically, I like this idea. D should eat its own dogfood


+11111!1!!1eleven1!!!!1!
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