latex3/svn-mirror — Issue #57: Show functions should test for undefined
Author: blefloch
Created: 2011-11-23 04:42:28+00:00
State: open

Related to #56.

Currently, `\int_show:N` and other register-showing functions test their argument for existence before issuing `\showthe`. On the other hand, `\prop_show:N`, `\clist_show:N`, and `\seq_show:N` crash if their argument is undefined, and `\tl_show:N` shows `undefined`. It would be more consistent if all of those functions checked that their argument is defined.