On 9-7-2016 12:38, clipka wrote:
> Am 09.07.2016 um 08:52 schrieb Thomas de Groot:
>> On 7-7-2016 16:02, Bald Eagle wrote:
>>> I see:
>>> #declare WriteStrands = off; //set to 'on' for the first pass.
>>>
>>> Isn't there a way to just check if the file exists, and if not, create
>>> it?
>>> I looked - but it's not clear that this is possible.
>>> Seemed like a useful and desirable feature to be added, if that's the
>>> case.
>>>
>>
>> In fact, there is a simple reason why I did not use the file_exists(S)
>> function, now that I think about it. It is that you may want to test
>> different settings before choosing the final ones (at least that is how
>> I work) and so - except for the very first time - there is always a file
>> present.
>
> You could use something like:
>
>     #declare WriteStrands = off; // set to 'on' to force re-writing
>     ...
>     #if (!file_exists(...)) #declare WriteStrands = on; #end
>

But, that would always set it to on, even when you want it to be off, or 
do I misunderstand this?

-- 
Thomas

Post a reply to this message