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|
(* Js_of_ocaml compiler
* http://www.ocsigen.org/js_of_ocaml/
* Copyright (C) 2010 Jérôme Vouillon
* Laboratoire PPS - CNRS Université Paris Diderot
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, with linking exception;
* either version 2.1 of the License, or (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*)
open! Stdlib
let aliases_ = String.Hashtbl.create 17
let rec resolve nm = try resolve (String.Hashtbl.find aliases_ nm) with Not_found -> nm
(****)
type kind =
[ `Pure
| `Mutable
| `Mutator
]
let kind_equal (a : kind) b = Poly.equal a b
type kind_arg =
[ `Shallow_const
| `Object_literal
| `Const
| `Mutable
]
type condition =
[ `If of string
| `Ifnot of string
]
type t =
[ `Requires of string list
| `Provides of string * kind * kind_arg list option
| `Version of ((int -> int -> bool) * string) list
| `Weakdef
| `Always
| `Alias of string
| `Deprecated of string
| condition
]
let string_of_kind = function
| `Pure -> "pure"
| `Mutable -> "mutable"
| `Mutator -> "mutator"
let kinds = String.Hashtbl.create 37
let kind_args_tbl = String.Hashtbl.create 37
let arities = String.Hashtbl.create 37
let kind nm = try String.Hashtbl.find kinds (resolve nm) with Not_found -> `Mutator
let kind_args nm =
try Some (String.Hashtbl.find kind_args_tbl (resolve nm)) with Not_found -> None
let arity nm = String.Hashtbl.find arities (resolve nm)
let has_arity nm a =
try String.Hashtbl.find arities (resolve nm) = a with Not_found -> false
let is_pure nm =
match nm with
| "%identity" | "%direct_int_div" | "%direct_int_mod" | "%direct_int_mul" -> true
| _ -> (
match kind nm with
| `Mutator -> false
| `Mutable | `Pure -> true)
let exists p = String.Hashtbl.mem kinds p
let externals = ref StringSet.empty
let add_external name = externals := StringSet.add name !externals
let get_external () = !externals
let register p k kargs arity =
(match String.Hashtbl.find kinds (resolve p) with
| exception Not_found -> ()
| k' when kind_equal k k' -> ()
| k' ->
Warning.warn
`Overriding_primitive_purity
"overriding the purity of the primitive %s: %s -> %s@."
p
(string_of_kind k')
(string_of_kind k));
add_external p;
(match arity with
| Some a -> String.Hashtbl.replace arities p a
| _ -> ());
(match kargs with
| Some k -> String.Hashtbl.replace kind_args_tbl p k
| _ -> ());
String.Hashtbl.replace kinds p k
let alias nm nm' =
add_external nm';
add_external nm;
String.Hashtbl.replace aliases_ nm nm'
let aliases () = String.Hashtbl.to_seq aliases_ |> List.of_seq
let named_values = ref StringSet.empty
let need_named_value s = StringSet.mem s !named_values
let register_named_value s = named_values := StringSet.add s !named_values
let reset () =
String.Hashtbl.clear kinds;
String.Hashtbl.clear kind_args_tbl;
String.Hashtbl.clear arities;
String.Hashtbl.clear aliases_;
named_values := StringSet.empty
|
