[alexandria-devel] [PATCH] add lastcons

[Mathieu Lemoine]

2010/5/18 Theam Yong Chew <senatorzergling at gmail.com>:
> On 5/19/10, Mathieu Lemoine <mathieu.lemoine at gmail.com> wrote:
>> Hi everyone.
>>
>> I made a little addition to the library. The lastcons function... It
>> is very simple and I found myself thinking "that's something that
>> ought to be in alexandria"...
>>
>> Not knowing the exact procedure to commit to the repo (and "git push"
>> give me a "fatal: The remote end hung up unexpectedly" which is to be
>> expected, I guess...), I send you the patch.
>>
>> Mathieu Lemoine.
>>
>
> This replicates a lot of code from DEF in alexandria's list.lisp.
>
> I'm looking at this, as at today:
>
> http://common-lisp.net/project/alexandria/darcs/alexandria/lists.lisp
>
> Why not bundle your function into that def macrolet form?
>
> I never realised that lastcar was safe. Should there be a safe- prefix?
> That was we can also rename lastcons to safe-last, the safe counterpart
> of cl:last.
>
> Yong.
>

I didn't included it into the def from because I need the little if at
the beginning (if (endp (cdr list)) list ...) [which is supposed to be
safe-endp, actually] which is not part of the def macro...
If there is a simple way to include it I agree it would be better, but
it looks like it would add garbage to the macro...

Mathieu.