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(*
This file is part of licht.
licht is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
licht is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with licht. If not, see <http://www.gnu.org/licenses/>.
*)
(** Internal representation for each type *)
type 'a value =
| Bool: DataType.Bool.t -> DataType.Bool.t value
| Num: DataType.Num.t ScTypes.DataFormat.t * DataType.Num.t -> DataType.Num.t value
| String: DataType.String.t -> DataType.String.t value
| List: 'a ScTypes.DataFormat.t * 'a list -> 'a list value
| Matrix: 'a ScTypes.DataFormat.t * 'a list list -> 'a list list value
type existencialResult =
| Result : 'a value -> existencialResult [@@unboxed]
module T:Sym_type.SYM_TYPE with type 'a obs = existencialResult = struct
type 'a t = 'a value
type 'a obs = existencialResult
let str s = String s
let num n = Num (ScTypes.DataFormat.Number, n)
let date d = Num (ScTypes.DataFormat.Date, d)
let bool b = Bool b
let observe x = Result x
end
type dic = (Functions.C.t * (int * int -> ScTypes.Result.t option))
type t = dic -> existencialResult
type obs = dic -> ScTypes.Result.t
module R = Eval_ref
(** Extract the type and the content from a value *)
let get_argument: type a. a value -> a Functions.typ * a = function
| Bool b -> Functions.t_bool, b
| Num (_, n) -> Functions.t_int, n
| String s -> Functions.t_string, s
| List (t, l) -> Functions.t_list (Functions.typ_of_format t), l
| Matrix (t, l) -> Functions.t_list (Functions.t_list (Functions.typ_of_format t)), l
(** Convert the evaluation result in a type depending of the function parameters *)
let wrap_call (Functions.C.R(ret, res)) type_builder = begin
let returnType = ScTypes.ReturnType.guess_format_result ret type_builder in
begin match returnType with
| ScTypes.DataFormat.Bool -> T.observe (T.bool res)
| ScTypes.DataFormat.String -> T.observe (T.str res)
| ScTypes.DataFormat.Number -> T.observe (T.num res)
| ScTypes.DataFormat.Date -> T.observe (T.date res)
end
end
(** Extract the format from a list of results *)
let build_format_list ll =
List.map (fun (Result x) ->
begin match x with
| Bool _ -> ScTypes.DataFormat.F (ScTypes.DataFormat.Bool)
| Num (x, _) -> ScTypes.DataFormat.F x
| String _ -> ScTypes.DataFormat.F (ScTypes.DataFormat.String)
| List (f, _) -> ScTypes.DataFormat.F f
| Matrix (f, _) -> ScTypes.DataFormat.F f
end
) ll
let value v _ = T.observe v
let ref r (_, mapper) = begin
match R.observe r mapper with
| R.Value (f, res) -> begin match f with
| ScTypes.DataFormat.Bool -> T.observe (T.bool res)
| ScTypes.DataFormat.String -> T.observe (T.str res)
| ScTypes.DataFormat.Number -> T.observe (T.num res)
| ScTypes.DataFormat.Date -> T.observe (T.date res)
end
| R.List (t, l) -> Result (List(t, l))
| R.Matrix (t, l) -> Result (Matrix(t, l))
end
let observe repr catalog = begin
let Result r = repr catalog in match r with
| Bool b -> ScTypes.Result.Ok (ScTypes.Type.boolean b)
| String s -> ScTypes.Result.Ok (ScTypes.Type.string s)
| Num (format, n) ->
begin match format with
(* We can only match numeric formats here *)
| ScTypes.DataFormat.Date -> ScTypes.Result.Ok (ScTypes.Type.date n)
| ScTypes.DataFormat.Number -> ScTypes.Result.Ok (ScTypes.Type.number n)
| _ -> raise Errors.TypeError
end
| _ -> raise Errors.TypeError
end
let expression e = e
let call0 ident (catalog, _) =
let name' = UTF8.to_utf8string ident in
let (arg1:(unit Functions.C.argument * unit)) = (Functions.t_unit, ()) in
wrap_call
(Functions.C.eval1 catalog name' arg1)
(fun () -> raise Errors.TypeError)
let call1 ident p1 ((catalog, _) as c) =
let name' = UTF8.to_utf8string ident in
(* Evaluate here p1 expression *)
let (Result r1) = p1 c in
let arg1 = get_argument r1 in
wrap_call
(Functions.C.eval1 catalog name' arg1)
(fun () -> build_format_list [Result r1])
let call2 ident p1 p2 ((catalog, _) as c) =
let name' = UTF8.to_utf8string ident in
let (Result r1) = p1 c in
let (Result r2) = p2 c in
let arg1 = get_argument r1
and arg2 = get_argument r2 in
wrap_call
(Functions.C.eval2 catalog name' arg1 arg2)
(fun () -> build_format_list [Result r1; Result r2])
let call3 ident p1 p2 p3 ((catalog, _) as c) =
let name' = UTF8.to_utf8string ident in
let (Result r1) = p1 c in
let (Result r2) = p2 c in
let (Result r3) = p3 c in
let arg1 = get_argument r1
and arg2 = get_argument r2
and arg3 = get_argument r3 in
wrap_call
(Functions.C.eval3 catalog name' arg1 arg2 arg3)
(fun () -> build_format_list [Result r1; Result r2; Result r3])
let callN ident params ((catalog, _) as c) =
let map_params expression = begin
let (Result r) = expression c in
let formatter = Format.str_formatter in
Functions.repr formatter (fst @@ get_argument r);
Format.flush_str_formatter ()
end in
let signature = List.map map_params params in
raise (Errors.Undefined (ident, signature))
|
