Re: How to enable Semantic for temp buffer

It works fine for me after I put (semantic-lex-init) before doing any
lexing in temp buffer. The good news is, now it can even work for Common
Lisp, out of the box without doing anything!

Scheme also works but since it does not have much overlap as Common Lisp
and Emacs Lisp, it's less polished but usable with small and simple defun
and sexp (Srefactor can format any sexp at point and its sub-sexp
recursively, not just whole buffer and defun).

Based on the text on that page I'll guess you will want to learn about
> `lisp-indent-function'.  It is a function, a variable, AND a property.
> Thus you can do:
>
> (get 'semantic-safe 'lisp-indent-function)
>
> to see how many following args should be indented past (or something.)
> I'm not sure how it works with 'defun.  I only ever used it to better
> indent custom functions I write using TAB.
>

This is awesome. Thank you very much, Eric.


On Wed, Apr 8, 2015 at 7:41 AM, Eric Ludlam <[email protected]> wrote:

> On 04/06/2015 01:40 PM, Tu Do wrote:
>
>> Hi Eric,
>>
>> How do I enable Semantic parsing for temporary Emacs Lisp mode? Semantic
>> that comes with Emacs 24.4 always returns the error "Buffer was not setup
>> for parsing" when I use `with-temp-buffer`, set it to Emac Lisp mode and
>> insert some Elisp code in there. I want a temp buffer to process some Elisp
>> code, but Semantic prevents me to do that.
>>
>
> Howdy,
>
> All that needs to be done is for the setup function to be run in the
> buffer first.  This used to happen in the mode hook, but since CEDET was
> converted to the new format, I'm not sure how it happens.
>
> A good example is in this function : semantic-c-parse-lexical-token
>
> where you will see a section like this:
>
>       ;; Hack in mode-local
>       (activate-mode-local-bindings)
>       ;; Setup C parser
>       (semantic-default-c-setup)
>       ;; CHEATER!  The following 3 lines are from
>       ;; `semantic-new-buffer-fcn', but we don't want to turn
>       ;; on all the other annoying modes for this little task.
>       (setq semantic-new-buffer-fcn-was-run t)
>       (semantic-lex-init)
>       (semantic-clear-toplevel-cache)
>       (remove-hook 'semantic-lex-reset-functions
>                'semantic-lex-spp-reset-hook t)
>       )
>
> It took a bit of effort for me to get it to work the first time.
>
> A much simpler example is in semantic/wisent/calc.el in `wisent-calc'
> which has a simpler parser, and also parsers a tmp buffer.
>
>  Btw, I've just made a formatting tool for Emacs Lisp using plain Semantic
>> lexer. Here are the demos: https://github.com/tuhdo/
>> semantic-refactor/blob/master/srefactor-demos/demos-elisp.org
>>
>>
> This is pretty cool.  Do you think the core bit would translate easily to
> other languages?  I always assumed most languages needed the parser as well.
>
> Based on the text on that page I'll guess you will want to learn about
> `lisp-indent-function'.  It is a function, a variable, AND a property.
> Thus you can do:
>
> (get 'semantic-safe 'lisp-indent-function)
>
> to see how many following args should be indented past (or something.)
> I'm not sure how it works with 'defun.  I only ever used it to better
> indent custom functions I write using TAB.
>
> Eric
>

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