path: root/lib/drl/sublanguage.ml

module Make (Storage : Management.Physical.S) = struct
  module Exec = Executor.Make (Storage)

  type configuration = unit
  type storage = Storage.t
  type ast = Ast.query
  type error = Exec.error

  let name = "drl"
  let parse _ = Ok ()

  let parse_sexp sexp =
    match Parser.of_sexp sexp with
    | Ok r -> Ok r
    | Error (Parser.ParseError s) -> Error (Exec.ParseError s)

  let execute storage db ast =
    match Gate.admit db ast with
    | Error msg -> Error (Exec.ParseError msg)
    | Ok () -> (
        match Exec.execute storage db ast with
        | Ok rel -> Ok (Sublanguage_types.Query rel)
        | Error e -> Error e)

  let sexp_of_error = Exec.sexp_of_error
end