Looking for some examples

Looking for some examples

[Patrick Mahan]

I've looked around on the wiki and googled, but I haven't really found any
examples.

I am cleaning a bunch of old code with tons of CPP macros of the form -
#define MACRONAME(_arg1, _arg2) \
    do {                                                   \
        /* code */                                       \
    } while (0)

I am converting these all to inline functions and already have some emacs
lisp code written to handle converting everything but the backslashes.  I
would like to remove the backslashes, but I do not want to leave all that
empty whitespace behind.  Is there a way to do this using
query-replace-regexp that also removes the whitespace?

Thanks,

Patrick

Re: Looking for some examples

[Emanuel Berg via Users list for the GNU Emacs text editor]

Patrick Mahan wrote:

> I am converting these all to inline functions and already
> have some emacs lisp code written to handle converting
> everything but the backslashes. I would like to remove the
> backslashes, but I do not want to leave all that empty
> whitespace behind. Is there a way to do this using
> query-replace-regexp that also removes the whitespace?

;; (setq before-save-hook nil)
(defun before-save-hook-f ()
  (untab-all)
  (delete-trailing-whitespace) )
(add-hook 'before-save-hook #'before-save-hook-f)

-- 
underground experts united
https://dataswamp.org/~incal

Re: Looking for some examples

[Emanuel Berg via Users list for the GNU Emacs text editor]

Emanuel Berg via Users list for the GNU Emacs text editor wrote:

> Patrick Mahan wrote:
>
>> I am converting these all to inline functions and already
>> have some emacs lisp code written to handle converting
>> everything but the backslashes. I would like to remove the
>> backslashes, but I do not want to leave all that empty
>> whitespace behind. Is there a way to do this using
>> query-replace-regexp that also removes the whitespace?
>
> ;; (setq before-save-hook nil)
> (defun before-save-hook-f ()
>   (untab-all)
>   (delete-trailing-whitespace) )
> (add-hook 'before-save-hook #'before-save-hook-f)

Also see `whitespace-cleanup'.

As for your question ... can't you just add [[:space:]]* to
the regexp that matches the backslash and have all of
it removed?

Maybe better to just save the buffer still ...

-- 
underground experts united
https://dataswamp.org/~incal

Re: Looking for some examples

[Stephen Berman]

On Wed, 6 Oct 2021 12:30:40 -0700 Patrick Mahan <plmahan@gmail.com> wrote:

> I've looked around on the wiki and googled, but I haven't really found any
> examples.
>
> I am cleaning a bunch of old code with tons of CPP macros of the form -
> #define MACRONAME(_arg1, _arg2) \
>     do {                                                   \
>         /* code */                                       \
>     } while (0)
>
> I am converting these all to inline functions and already have some emacs
> lisp code written to handle converting everything but the backslashes.  I
> would like to remove the backslashes, but I do not want to leave all that
> empty whitespace behind.  Is there a way to do this using
> query-replace-regexp that also removes the whitespace?

C-M-% [[:space:]]+\\$ RET RET !

Steve Berman

Re: Looking for some examples

[2QdxY4RzWzUUiLuE]

On 2021-10-06 at 22:32:15 +0200,
Stephen Berman <stephen.berman@gmx.net> wrote:

> On Wed, 6 Oct 2021 12:30:40 -0700 Patrick Mahan <plmahan@gmail.com> wrote:
> 
> > I've looked around on the wiki and googled, but I haven't really found any
> > examples.
> >
> > I am cleaning a bunch of old code with tons of CPP macros of the form -
> > #define MACRONAME(_arg1, _arg2) \
> >     do {                                                   \
> >         /* code */                                       \
> >     } while (0)
> >
> > I am converting these all to inline functions and already have some emacs
> > lisp code written to handle converting everything but the backslashes.  I
> > would like to remove the backslashes, but I do not want to leave all that
> > empty whitespace behind.  Is there a way to do this using
> > query-replace-regexp that also removes the whitespace?
> 
> C-M-% [[:space:]]+\\$ RET RET !

That won't remove the backslashes that *aren't* preceded by whitespace,
which may or may not be a problem in your case.  To address that, change
the + (one or more) to a * (zero or more):

    C-M-% [[:space:]]*\\$ RET RET !

Re: Looking for some examples

[Patrick Mahan]

On Wed, Oct 6, 2021 at 1:32 PM Stephen Berman <stephen.berman@gmx.net>
wrote:

> On Wed, 6 Oct 2021 12:30:40 -0700 Patrick Mahan <plmahan@gmail.com> wrote:
>
> > I've looked around on the wiki and googled, but I haven't really found
> any
> > examples.
> >
> > I am cleaning a bunch of old code with tons of CPP macros of the form -
> > #define MACRONAME(_arg1, _arg2) \
> >     do {                                                   \
> >         /* code */                                       \
> >     } while (0)
> >
> > I am converting these all to inline functions and already have some emacs
> > lisp code written to handle converting everything but the backslashes.  I
> > would like to remove the backslashes, but I do not want to leave all that
> > empty whitespace behind.  Is there a way to do this using
> > query-replace-regexp that also removes the whitespace?
>
> C-M-% [[:space:]]+\\$ RET RET !
>
>
ARRGGGH! Why can I not remember '[[:space:]]'!!!!  *Sigh* that's what I was
looking for...

Patrick