+ let get_ligature word =
+ let len = String.length word in
+ let aux_tex () =
+ try
+ for i = len - 1 downto 0 do
+ if HExtlib.is_alpha word.[i] then ()
+ else
+ (if word.[i] = '\\' then raise (Found i) else raise (Found ~-1))
+ done;
+ None
+ with Found i ->
+ if i = ~-1 then None else Some (String.sub word i (len - i))
+ in
+ let aux_ligature () =
+ try
+ for i = len - 1 downto 0 do
+ if CicNotationLexer.is_ligature_char word.[i] then ()
+ else raise (Found (i+1))
+ done;
+ raise (Found 0)
+ with
+ | Found i ->
+ (try
+ Some (String.sub word i (len - i))
+ with Invalid_argument _ -> None)
+ in
+ match aux_tex () with
+ | Some macro -> macro
+ | None -> (match aux_ligature () with Some l -> l | None -> word)
+ in