Re: Inefficient code in reftex-index.el

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> There is no other interface into the number of accessible match
>> strings (which might be nil) rather than
>> (/ (length (match-data t)) 2).

>     That's still pretty inefficient -- I suggest that we introduce a new
>     function `match-count' to return that number.

> Is there sufficient use for this function to justify introducing it?
> I think that most cases where this would be used, the code would
> then proceed to call match-data.

Actually the only cases I can vaguely remember using the
(/ (length (match-data)) 2) idiom didn't use the whole (match-data).
They typically used the idiom in order to know *which* subgroup matched (of
course it only works if you craft your regexp carefully).


        Stefan