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open StdLabels
module M(T:Sounds.Sig.T) = struct
type voyel = T.t Modifiers.Sig.voyel
type group = voyel * T.t Modifiers.Sig.consonants option
type modifier = T.t Modifiers.Sig.modifier
(** Apply all the modifiers to the syllabic group in order to correct the
relation between the elements
This is just a fold_left list, and the order matter : for example
nasalisation shall be applied after the S vocalisation
*)
let apply_modifiers
: group * T.t option option -> modifier list -> group * T.t option option
= fun e m ->
List.fold_left m
~init:e
~f:(fun e f -> f (module T:Sounds.Sig.T with type t = T.t) e)
let change_voyel
= fun init ->
let (((v1, v2), _) , ending) = init in
match ending with
| None -> v2
| Some _ -> v1
let rec _rebuild ~(m:modifier list) acc ending_consonant : group list -> T.t list
= function
| [] -> acc
| hd::tl ->
let modifier = match tl with
| [] -> Modifiers.nasal::m
| _ -> (Modifiers.vocalize_s) :: (Modifiers.nasal) :: m in
let (voyel, consonants), ending_consonant =
apply_modifiers
(hd, ending_consonant)
modifier in
let voyel = change_voyel ((voyel, consonants), ending_consonant) in
(* Add the last consonant and the voyel *)
let acc = match ending_consonant with
| None -> voyel::acc
| Some s ->
let default = voyel :: acc in
match s with
| None -> default
| Some s ->
voyel :: s::acc in
match consonants with
| None -> _rebuild ~m:[] acc None tl
| Some {ending; opening; following} ->
let acc = match following with
| None -> acc
| Some s -> s::acc in
match opening with
| [] ->_rebuild ~m:[] acc ending tl
| opening -> _rebuild ~m:[] (opening @ acc) ending tl
(** Rebuild the list in the normal order
The voyels have to be choosen, depending either they are followed by a
consonant or not
Some consonants may be changed depending of the following voyel
The list has to be reversed
and so one
*)
let rebuild
: T.t Modifiers.Sig.consonants option -> group list -> T.t list
= fun ending elems ->
let elems' = match ending with
| None -> elems
| Some _ -> ((T.none, T.none), ending)::elems in
_rebuild ~m:[Modifiers.mute_consonant] [] None elems'
end
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