Re: using define-lex

Hurray, Eric, it works! Thank you so much for taking the time to help me
out.
I guess now I can figure out the answer to my original question (how to
invoke wisent-parse manually) by playing with the  .wy files and generating
-wy.el files from them.

By the way, I had read the online wisent manuals at www.gnu.org and nowhere
did I find the clear instruction you sent me in your last email. As my
emacs lisp folder already had a semantic subfolder with wisent related
files in it, it was hard to guess that I needed to load
cedet-devel-load.el, a file that was anyway not available in my machine.

May be your instructions should be made available conspicuously somewhere
in the gnu.org manuals.

Thanks and regards,

Arnab

On Thu, Oct 29, 2015 at 6:56 AM, Eric Ludlam <[email protected]> wrote:

> Hi,
>
> I also use Emacs 24 that I get from Ubuntu.
>
> The complete set of steps is along the lines of:
>
> 1) Use Emacs 24 - yours is fine
> 2) Download CEDET from git on sourceforge
> 3) Follow "INSTALL" file that came from CEDET download
>    This includes a line about putting this line:
>
> (load-file "/home/user/cedet/cedet-devel-load.el")
>
>    into your .emacs file
>
> 4) Pull up a .wy file, and it should be in the correct mode.
>
> I hope that helps.
> Eric
>
>
> On 10/28/2015 08:48 PM, Arnab Chakraborty wrote:
>
>> Thanks, Eric, for the helpful tips. I am following your advice and
>> trying the
>> .wy to -wy.el path. However, I cannot get myself into the *wisent-mode*.
>> Googleing wisent-mode is not producing any help either. Where is this
>> mode defined?
>>
>> I loaded *java-tags.wy* hoping that the .wy extension will automatically
>> bring me to the correct mode. It didn't. I manually "*load-file*"-ed
>> *grammar.elc* and *wisent.elc*. This allowed a new mode
>> semantic-grammar-mode which I turned on manually. C-c C-c was bound to
>> *semantic-grammar-create-package*
>> which looked kind of hopeful. But upon hitting that key I get
>> *semantic-grammar-parsetable-builder-default:
>> `semantic-grammar-parsetable-builder' not defined*
>>
>> I am using emacs 24.1 that I "apt-get install"-ed in Ubuntu 12.10, if
>> that is relevant.
>>
>>
>> Thanks and regards,
>>
>> Arnab
>>
>> On Wed, Oct 28, 2015 at 4:57 PM, Eric Ludlam <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>>     On 10/27/2015 09:54 PM, Arnab Chakraborty wrote:
>>
>>         Hi Eric,
>>
>>              Thanks a lot for your help. But still some points are not
>>         clear to me.
>>         Let me tell you the simple grammar I am working with.
>>
>>         ;;First the grammar as a elisp structure. The language just
>>         consists of
>>         lists of ;;the token "number".
>>         (setq g '( (number)
>>                          ()
>>                          (line
>>                               ((number) (format "%s" $1))
>>                               ((line number) (format "%s %s" $1 $2))
>>                          )
>>                        )
>>         )
>>
>>         ;;;Convert to an automaton
>>         (setq a (wisent-grammar-compile g))
>>
>>         ;;;Create a lexer
>>         (define-lex mylex "" semantic-number-analyzer)
>>
>>         ;;;Try to put them together (it is here that I get error, saying
>>         that
>>         ;;;mylex does not fit the bill.
>>         (wisent-parse a mylex)
>>
>>
>>         I have not tried using a .wy file yet, because I have not yet
>>         figured
>>         out how to convert a .wy file to  an elisp structure. So java.wy
>> etc
>>            are not helping me yet.
>>
>>
>>     I see. I'm less familiar with this level of use of wisent, and now I
>>     know what you meant by using a grammar without the semantic
>>     infrastructure.
>>
>>     I'm pretty sure what you want is possible, but all the
>>     documentation, and what I know about it is rigged up to bind a
>>     parser into a buffer with a series of buffer local variables.  Then
>>     the helper functions that parse sections of a buffer will all have
>>     the correct context needed to start parsing.
>>
>>     If your goal is to eventually parse buffer contents, then you should
>>     definitely start with the .wy files.  The basic process for
>>     converting a .wy file into a -wy.el file is bound to a key in
>>     wisent-mode, so when you are editing the grammar, you press C-c C-c,
>>     and it gets converted to lisp, and also creates all the other needed
>>     variables.  For example, you will need both the grammar, the keyword
>>     table, to tokens table, plus the individual token analyzers needed
>>     for the lexer, all of which can be derived directly from your .wy
>>     file.   It will also create a function to install your grammar into
>>     a buffer.
>>
>>     If you still want to construct your grammar by hand, calc-wy.el is
>>     the simplest example in the collection that shows what variables you
>>     need, and how to bind it together to a buffer, and wisent-calc shows
>>     how to make sure the buffer is fully setup by calling misc init
>>     functions.  I don't really know the internals of the wisent function
>>     stack to avoid using an intermediate buffer.
>>
>>     Eric
>>
>>
>>

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