Is there any way to test variable types?

For example

bundle edit_line append_if_no_lines(list)
{
insert_lines:

 "$(list)"

   comment => "Append lines to the file if they don't already exist";
}

If by accident list iteration is done at the file promiser level this
wont catch it, it will just happily work performing slist length
individual edits on the file.


-- 
Nick Anderson <n...@cmdln.org>
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