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envaux.ml
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envaux.ml
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(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
(* OCaml port by John Malecki and Xavier Leroy *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. *)
(* *)
(* All rights reserved. This file is distributed under the terms of *)
(* the GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
open Env
type error =
Module_not_found of Path.t
exception Error of error
let env_cache =
(Hashtbl.create 59 : ((Env.summary * Subst.t), Env.t) Hashtbl.t)
let reset_cache () =
Hashtbl.clear env_cache;
Env.reset_cache()
let rec env_from_summary sum subst =
try
Hashtbl.find env_cache (sum, subst)
with Not_found ->
let env =
match sum with
Env_empty ->
Env.empty
| Env_value(s, id, desc) ->
Env.add_value id (Subst.value_description subst desc)
(env_from_summary s subst)
| Env_type(s, id, desc) ->
Env.add_type ~check:false id
(Subst.type_declaration subst desc)
(env_from_summary s subst)
| Env_extension(s, id, desc) ->
Env.add_extension ~check:false ~rebind:false id
(Subst.extension_constructor subst desc)
(env_from_summary s subst)
| Env_module(s, id, pres, desc) ->
Env.add_module_declaration ~check:false id pres
(Subst.module_declaration Keep subst desc)
(env_from_summary s subst)
| Env_modtype(s, id, desc) ->
Env.add_modtype id (Subst.modtype_declaration Keep subst desc)
(env_from_summary s subst)
| Env_class(s, id, desc) ->
Env.add_class id (Subst.class_declaration subst desc)
(env_from_summary s subst)
| Env_cltype (s, id, desc) ->
Env.add_cltype id (Subst.cltype_declaration subst desc)
(env_from_summary s subst)
| Env_open(s, path) ->
let env = env_from_summary s subst in
let path' = Subst.module_path subst path in
begin match Env.open_signature Asttypes.Override path' env with
| Ok env -> env
| Error `Functor -> assert false
| Error `Not_found -> raise (Error (Module_not_found path'))
end
| Env_functor_arg(Env_module(s, id, pres, desc), id')
when Ident.same id id' ->
Env.add_module_declaration ~check:false
id pres (Subst.module_declaration Keep subst desc)
~arg:true (env_from_summary s subst)
| Env_functor_arg _ -> assert false
| Env_constraints(s, map) ->
Path.Map.fold
(fun path info ->
Env.add_local_type (Subst.type_path subst path)
(Subst.type_declaration subst info))
map (env_from_summary s subst)
| Env_copy_types s ->
let env = env_from_summary s subst in
Env.make_copy_of_types env env
| Env_persistent (s, id) ->
let env = env_from_summary s subst in
Env.add_persistent_structure id env
| Env_value_unbound (s, str, reason) ->
let env = env_from_summary s subst in
Env.enter_unbound_value str reason env
| Env_module_unbound (s, str, reason) ->
let env = env_from_summary s subst in
Env.enter_unbound_module str reason env
in
Hashtbl.add env_cache (sum, subst) env;
env
let env_of_only_summary env =
Env.env_of_only_summary env_from_summary env
(* Error report *)
open Format
module Style = Misc.Style
let report_error ppf = function
| Module_not_found p ->
fprintf ppf "@[Cannot find module %a@].@."
(Style.as_inline_code Printtyp.path) p
let () =
Location.register_error_of_exn
(function
| Error err -> Some (Location.error_of_printer_file report_error err)
| _ -> None
)