[Dev-luatex] return value of filter callbacks

Taco Hoekwater taco at elvenkind.com
Fri Nov 5 14:52:50 CET 2010


On 11/05/2010 02:46 PM, Manuel Pégourié-Gonnard wrote:
> Hi,
>
> [btw: I meant to write to the users list, sorry]
>
> Le 05/11/2010 14:22, Taco Hoekwater a écrit :
>> In all these cases the result of returning a boolean is the same:
>>
>>     false == callback has failed
>>     true == callback has run ok, but nothing has been changed
>>
>> the latter case (true) is interesting because it allows a speed
>> optimization that can be considerable. I could have sworn this was
>> mentioned in the manual, but I cannot find it myself either.
>
> Ok, thanks for the clarification. Just to be sure: in case the function returns
> false, and error will be issued, right?

Eh ... no. You have to raise an error yourself, if you want that.





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