Change rule interface as discussed

latex3 · Aug 13, 2022 · 740636f · 740636f
1 parent bd27ef5
commit 740636f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/base/ltluatex.dtx b/base/ltluatex.dtx
@@ -1850,7 +1850,7 @@ luatexbase.add_to_callback = add_to_callback
 % \begin{macro}{declare_callback_rule}
 %   Add an ordering constraint between two callback implementations
 %    \begin{macrocode}
-local function declare_callback_rule(name, desc1, desc2, relation)
+local function declare_callback_rule(name, desc1, relation, desc2)
   if not callbacktypes[name] or
     not desc1 or not desc2 or
     desc1 == "" or desc2 == "" then
@@ -1860,7 +1860,7 @@ local function declare_callback_rule(name, desc1, desc2, relation)
         .. "declare_callback_rule(<callback>, <description_a>, <description_b>)"
     )
   end
-  if relation == 'before' or not relation then
+  if relation == 'before' then
     relation = nil
   elseif relation == 'after' then
     desc2, desc1 = desc1, desc2