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|
type error = ParseError of string
let validate = function
| (Ast.Begin { limit = Some limit; _ } | Ast.Fetch { limit = Some limit; _ })
when limit <= 0 ->
Error (ParseError "The provision of `limit` is expected to be positive.")
| stmt -> Ok stmt
let of_sexp sexp =
match Ast.statement_of_sexp sexp with
| exception exn -> Error (ParseError (Printexc.to_string exn))
| stmt -> validate stmt
let of_string s =
match Sexplib.Sexp.of_string s |> Ast.statement_of_sexp with
| exception exn -> Error (ParseError (Printexc.to_string exn))
| stmt -> validate stmt
let to_string stmt = Ast.sexp_of_statement stmt |> Sexplib.Sexp.to_string_hum
|
