On 12/02/2010, at 5:56 AM, Joseph Wright wrote:

> On 11/02/2010 18:26, Philipp Stephani wrote:
>> 
>> I wonder what the guarantees about the scratch variables like \l_tmpa_tl are. The documentation just states that "they are not used by conditionals or predicate functions." Does this mean that any other kernel macro might modify them?
> 
> A quick search shows they are used in the tl module. I'd stick to defining "private" scratch variables.

Should we change this?
I.e., use \l_kernel_tmpa_tl or \l_reserveda_tl instead for us and let package writers use \l_tmpa_tl ?

-- Will