CEDET

On 01/18/2012 06:35 AM, Lars Petter Mostad wrote:
> Hi!
>
> Has anybody ever worked on support for VHDL?
>
> If not, I might look into it (don't hold your breath, though).
>
> I would appreciate any comments from people that have tried before!
>
> - Lars Petter

There is no explicit VHDL support in CEDET, nor externally that I know 
of.  If VHDL is supported well by exuberant ctags, then you can probably 
configure the ctags support for vhdl pretty quickly, using one of the 
other languages as a template.  (It's a 1 liner).

See /semantic/ctags/semantic-ectag-lang.el

If you develop something that works well, let the list know.

Thanks
Eric

---------- Forwarded message ----------
From: Lars Petter Mostad <larspm@...>
Date: Mon, May 28, 2012 at 10:48 AM
Subject: Re: [CEDET-devel] VHDL Support
To: "Eric M. Ludlam" <ericludlam@...>


I have now started looking at adding vhdl support.

Exuberant ctags does have support for vhdl, but not the ctags version
that comes with the windows distribution of emacs does not. So, to add
"self contained" vhdl support, I will use wisent.

I'm hoping that I don't have to add my own lexer. Emacs has a good
vhdl-mode, so running (semantic-lex (point-min) (point-max)) on a vhdl
file gives me something like this:

((symbol 1 . 7)
 (symbol 8 . 15)
 (symbol 16 . 18)
 (symbol 21 . 25)
 (semantic-list 26 . 76)
 (punctuation 76 . 77)
 ...)

I will base my grammar file on this BNF:
http://www.iis.ee.ethz.ch/~zimmi/download/vhdl93_syntax.html

I'm having some problems with the basic plumbing. To get started I
wrote wisent-vhdl.wy like this:

%languagemode vhdl-mode
%start goal

%keyword ENTITY        "entity"
%keyword REPORT        "report"

%%

goal
 : REPORT ENTITY
   (message "this is an action")
 ;

%%

entity and report are just random vhdl keywords, but i was expecting
to see "this is an action" when opening a nonsensical vhdl file like
this:

report entity

I can see that wisent-vhdl-wy--install-parser runs every time i open a
new vhdl file, and semantic-lex now gives ((REPORT 1 . 7) (ENTITY 8 .
14)) instead of ((symbol 1 . 7) (symbol 8 . 14)), but the parser code
never runs. I have tested this by adding (message "this is
wisent-vhdl-wy--parse-table") to the progn in
wisent-vhdl-wy--parse-table in the generated wisent-vhdl-wy.el.

This is my wisent-vhdl.el:

(require 'vhdl-mode)      ;; major mode definition for FOO
(require 'wisent-vhdl-wy) ;; The parser

;;;###autoload
(defun semantic-default-vhdl-setup ()
 "Set up a buffer for semantic parsing of the VHDL language."
 (message "setting up vhd mode")
 (wisent-vhdl-wy--install-parser)
)

;;;###autoload
(add-hook 'vhdl-mode-hook 'semantic-default-vhdl-setup)

(provide 'wisent-vhdl)

Can you see whats missing?

I'm using CEDET 1.1 with emacs 24.0.97.

When trying the bzr trunk (with both emacs 23.4 and emacs bzr trunk) i
got "bad input grammar" when compiling the grammar files (even the
existing ones for python, java, etc.) with "C-c C-c", even though they
compile fine with the makefile.

- Lars Petter

On Sat, Jan 21, 2012 at 4:55 AM, Eric M. Ludlam <ericludlam@...> wrote:
> On 01/18/2012 06:35 AM, Lars Petter Mostad wrote:
>>
>> Hi!
>>
>> Has anybody ever worked on support for VHDL?
>>
>> If not, I might look into it (don't hold your breath, though).
>>
>> I would appreciate any comments from people that have tried before!
>>
>> - Lars Petter
>
>
> There is no explicit VHDL support in CEDET, nor externally that I know of.
>  If VHDL is supported well by exuberant ctags, then you can probably
> configure the ctags support for vhdl pretty quickly, using one of the other
> languages as a template.  (It's a 1 liner).
>
> See /semantic/ctags/semantic-ectag-lang.el
>
> If you develop something that works well, let the list know.
>
> Thanks
> Eric

Hi Lars,

You will eventually need to create your own lexer.  I don't think I've 
every tried wisent and the default lexer together, so I can't say if it 
works or not.  No worries though, it is pretty easy.

I've attached new versions of wisent-vhdl.wy and .el which produced a 
variable tag.  Variable is obviously the wrong thing for your report, 
but it should get the right idea across.

Enjoy
Eric

On 05/28/2012 04:51 AM, Lars Petter Mostad wrote:
> ---------- Forwarded message ----------
> From: Lars Petter Mostad<larspm@...>
> Date: Mon, May 28, 2012 at 10:48 AM
> Subject: Re: [CEDET-devel] VHDL Support
> To: "Eric M. Ludlam"<ericludlam@...>
>
>
> I have now started looking at adding vhdl support.
>
> Exuberant ctags does have support for vhdl, but not the ctags version
> that comes with the windows distribution of emacs does not. So, to add
> "self contained" vhdl support, I will use wisent.
>
> I'm hoping that I don't have to add my own lexer. Emacs has a good
> vhdl-mode, so running (semantic-lex (point-min) (point-max)) on a vhdl
> file gives me something like this:
>
> ((symbol 1 . 7)
>   (symbol 8 . 15)
>   (symbol 16 . 18)
>   (symbol 21 . 25)
>   (semantic-list 26 . 76)
>   (punctuation 76 . 77)
>   ...)
>
> I will base my grammar file on this BNF:
> http://www.iis.ee.ethz.ch/~zimmi/download/vhdl93_syntax.html
>
> I'm having some problems with the basic plumbing. To get started I
> wrote wisent-vhdl.wy like this:
>
> %languagemode vhdl-mode
> %start goal
>
> %keyword ENTITY        "entity"
> %keyword REPORT        "report"
>
> %%
>
> goal
>   : REPORT ENTITY
>     (message "this is an action")
>   ;
>
> %%
>
> entity and report are just random vhdl keywords, but i was expecting
> to see "this is an action" when opening a nonsensical vhdl file like
> this:
>
> report entity
>
> I can see that wisent-vhdl-wy--install-parser runs every time i open a
> new vhdl file, and semantic-lex now gives ((REPORT 1 . 7) (ENTITY 8 .
> 14)) instead of ((symbol 1 . 7) (symbol 8 . 14)), but the parser code
> never runs. I have tested this by adding (message "this is
> wisent-vhdl-wy--parse-table") to the progn in
> wisent-vhdl-wy--parse-table in the generated wisent-vhdl-wy.el.
>
> This is my wisent-vhdl.el:
>
> (require 'vhdl-mode)      ;; major mode definition for FOO
> (require 'wisent-vhdl-wy) ;; The parser
>
> ;;;###autoload
> (defun semantic-default-vhdl-setup ()
>   "Set up a buffer for semantic parsing of the VHDL language."
>   (message "setting up vhd mode")
>   (wisent-vhdl-wy--install-parser)
> )
>
> ;;;###autoload
> (add-hook 'vhdl-mode-hook 'semantic-default-vhdl-setup)
>
> (provide 'wisent-vhdl)
>
> Can you see whats missing?
>
> I'm using CEDET 1.1 with emacs 24.0.97.
>
> When trying the bzr trunk (with both emacs 23.4 and emacs bzr trunk) i
> got "bad input grammar" when compiling the grammar files (even the
> existing ones for python, java, etc.) with "C-c C-c", even though they
> compile fine with the makefile.
>
> - Lars Petter
>
> On Sat, Jan 21, 2012 at 4:55 AM, Eric M. Ludlam<ericludlam@...>  wrote:
>> On 01/18/2012 06:35 AM, Lars Petter Mostad wrote:
>>>
>>> Hi!
>>>
>>> Has anybody ever worked on support for VHDL?
>>>
>>> If not, I might look into it (don't hold your breath, though).
>>>
>>> I would appreciate any comments from people that have tried before!
>>>
>>> - Lars Petter
>>
>>
>> There is no explicit VHDL support in CEDET, nor externally that I know of.
>>   If VHDL is supported well by exuberant ctags, then you can probably
>> configure the ctags support for vhdl pretty quickly, using one of the other
>> languages as a template.  (It's a 1 liner).
>>
>> See /semantic/ctags/semantic-ectag-lang.el
>>
>> If you develop something that works well, let the list know.
>>
>> Thanks
>> Eric
>
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