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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 Q Public License version 1.0. *)
(* *)
(***********************************************************************)
open Misc
open Types
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 extract_sig env mty =
match Mtype.scrape env mty with
Mty_signature sg -> sg
| _ -> fatal_error "Envaux.extract_sig"
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_exception(s, id, desc) ->
Env.add_exception ~check:false id
(Subst.exception_declaration subst desc)
(env_from_summary s subst)
| Env_module(s, id, desc) ->
Env.add_module_declaration id
(Subst.module_declaration subst desc)
(env_from_summary s subst)
| Env_modtype(s, id, desc) ->
Env.add_modtype id (Subst.modtype_declaration 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
let md =
try
Env.find_module path' env
with Not_found ->
raise (Error (Module_not_found path'))
in
Env.open_signature Asttypes.Override path'
(extract_sig env md.md_type) env
| Env_functor_arg(Env_module(s, id, desc), id') when Ident.same id id' ->
Env.add_module_declaration id (Subst.module_declaration subst desc)
~arg:true (env_from_summary s subst)
| Env_functor_arg _ -> assert false
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
let report_error ppf = function
| Module_not_found p ->
fprintf ppf "@[Cannot find module %a@].@." Printtyp.path p
|
