On 02/17/2016 12:14 AM, Tom de Vries wrote:
Here's the documentation entry for the gt spec function (I forgot to add
it when introducing the function), using the new semantics.
Copy-pasting from the resulting .info viewed in emacs for a
human-readable version:
...
'gt'
The 'gt' (greater than) function takes one or more arguments.
It returns either NULL or the empty string. If it has one
argument, it returns NULL. If it has two arguments, it
compares them: it returns the empty string if the first
argument is greater than the second argument, otherwise it
returns NULL. If it has more than two arguments, it behaves
as if only the last two arguments were passed. It can be used
f.i. as 'S' in a spec directive %{'S':'X'}: if 'S' is NULL,
the empty string is substituted, and if 'S' is the empty
string, 'X' is substituted.
%:gt(%{fsome-option-value=*:%*} 1)
...
OK for stage4 trunk?
I'm not an expert on spec strings.... but from a user perspective, what
is the difference between "NULL" and "the empty string"? The other spec
escapes are documented in terms of pattern substitutions at the point
where the escape appears in the spec string.
-Sandra
