Re: exist, configure, doc2tex and \index

[Petr M. <mi...@ph...>]

> You are missing my point.
> foo is a variable.  It may hold a string ("xxx") or it may hold an integer (9).
> It is legal to call
> 	if (exists(foo))
> in the first case, and the return code is 1, which tells you that foo contains
> the name of a defined variable.
>
> As I see it, if foo = 9 then  exists(foo) should return 0, which tells you that
> foo does _not_ contain the name of a defined variable.  That is what it does
> now, and I think it is correct.  Daniel's patch would have it error out rather
> than returning.

Ok, you are right.

>> gnuplot> help exists
>>   `exists("X")` returns 1 if a variable named X has been defined,
>>   otherwise it returns 0.
>    ^^^^^^^^^^^^^^^^^^^^^^^
>
> That is exactly what I am saying.  If the argument to exists() is not a
> defined variable name  (i.e. a string), then exists() should return 0.
> Not error out;  return 0.

Could you perhaps add this into "help exists"?

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PM