Returning multiple groups from a fancy split

Returning multiple groups from a fancy split

[Tommy Kelly]

I'm looking at one of the call-a-function form of fancy splits, namely:

   (! FUNC SPLIT)

Info says that the argument passed to FUNC will be "the result of
SPLIT". Suppose I have:  

   (! my-function (& "a-group" "another-group))

The result of the inner split there is both groups, right? So in what
form are they returned (and passed)? As a list of two strings, or what? 

Tommy

P.S. Bonus question to help a lisp newb. Is there a simple piece of lisp
I could have written as the body of my-function so as to answer my own
question? 

Re: Returning multiple groups from a fancy split

[Tassilo Horn]

Tommy Kelly <tommy.kelly@verilab.com> writes:

Hi Tommy,

I have no clue about fancy mail splitting anymore (converted to
server-side sieve splitting), so I only take the bonus question.

> P.S. Bonus question to help a lisp newb. Is there a simple piece of
> lisp I could have written as the body of my-function so as to answer
> my own question?

(defun tommy-split-fun (arg)
  (message "SPLIT evaluated to %s" arg))

Bye,
Tassilo

Re: Returning multiple groups from a fancy split

[Štěpán Němec]

Tassilo Horn <tassilo@member.fsf.org> writes:

> Tommy Kelly <tommy.kelly@verilab.com> writes:
>
> Hi Tommy,
>
> I have no clue about fancy mail splitting anymore (converted to
> server-side sieve splitting), so I only take the bonus question.
>
>> P.S. Bonus question to help a lisp newb. Is there a simple piece of
>> lisp I could have written as the body of my-function so as to answer
>> my own question?
>
> (defun tommy-split-fun (arg)
>   (message "SPLIT evaluated to %s" arg))

Better use %S instead of %s to e.g. distinguish between symbols and
strings as return values. This also assumes the function receives
exactly one argument; you could use (&rest args) instead of (arg) to get
the list of all arguments received.

  Štěpán

Re: Returning multiple groups from a fancy split

[Andreas Schwab]

Štěpán Němec <stepnem@gmail.com> writes:

> This also assumes the function receives exactly one argument;

Because that's exactly how it is documented.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: Returning multiple groups from a fancy split

[Andreas Schwab]

Tommy Kelly <tommy.kelly@verilab.com> writes:

> Info says that the argument passed to FUNC will be "the result of
> SPLIT". Suppose I have:  
>
>    (! my-function (& "a-group" "another-group))
>
> The result of the inner split there is both groups, right? So in what
> form are they returned (and passed)? As a list of two strings, or what? 

Right:

(defun nnmail-split-it (split)
  ;; Return a list of groups matching SPLIT.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."