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|
(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
(* Objective Caml port by John Malecki and Xavier Leroy *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* Automatique. Distributed only by permission. *)
(* *)
(***********************************************************************)
(* $Id$ *)
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, 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
Tmty_signature sg -> sg
| _ -> fatal_error "Envaux.extract_sig"
let rec env_from_summary sum =
try
Hashtbl.find env_cache sum
with Not_found ->
let env =
match sum with
Env_empty ->
Env.empty
| Env_value(s, id, desc) ->
Env.add_value id desc (env_from_summary s)
| Env_type(s, id, desc) ->
Env.add_type id desc (env_from_summary s)
| Env_exception(s, id, desc) ->
Env.add_exception id desc (env_from_summary s)
| Env_module(s, id, desc) ->
Env.add_module id desc (env_from_summary s)
| Env_modtype(s, id, desc) ->
Env.add_modtype id desc (env_from_summary s)
| Env_class(s, id, desc) ->
Env.add_class id desc (env_from_summary s)
| Env_cltype (s, id, desc) ->
Env.add_cltype id desc (env_from_summary s)
| Env_open(s, path) ->
let env = env_from_summary s in
let mty =
try
Env.find_module path env
with Not_found ->
raise (Error (Module_not_found path))
in
Env.open_signature path (extract_sig env mty) env
in
Hashtbl.add env_cache sum env;
env
let env_of_event =
function
None -> Env.empty
| Some ev -> env_from_summary ev.Instruct.ev_typenv
(* Error report *)
open Formatmsg
let report_error error =
open_box 0;
begin match error with
Module_not_found p ->
print_string "Cannot find module "; Printtyp.path p
end;
close_box(); print_newline()
|
