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module Html = Tyxml.Html
let rec list_concat_map ?sep ~f = function
| [] -> []
| [x] -> f x
| x :: xs ->
let hd = f x in
let tl = list_concat_map ?sep ~f xs in
match sep with
| None -> hd @ tl
| Some sep -> hd @ sep :: tl
let rec list_concat_map_list_sep ~sep ~f = function
| [] -> []
| [x] -> f x
| x :: xs ->
let hd = f x in
let tl = list_concat_map_list_sep ~sep ~f xs in
hd @ sep @ tl
let optional_code children =
match children with
| [] -> []
| children -> [ Html.code children ]