81 lines
2.9 KiB
OCaml
81 lines
2.9 KiB
OCaml
(***********************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
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(* OCaml port by John Malecki and Xavier Leroy *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the Q Public License version 1.0. *)
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(* *)
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(***********************************************************************)
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open Misc
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open Types
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open Env
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type error =
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Module_not_found of Path.t
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exception Error of error
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let env_cache =
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(Hashtbl.create 59 : ((Env.summary * Subst.t), Env.t) Hashtbl.t)
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let reset_cache () =
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Hashtbl.clear env_cache;
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Env.reset_cache()
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let extract_sig env mty =
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match Mtype.scrape env mty with
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Mty_signature sg -> sg
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| _ -> fatal_error "Envaux.extract_sig"
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let rec env_from_summary sum subst =
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try
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Hashtbl.find env_cache (sum, subst)
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with Not_found ->
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let env =
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match sum with
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Env_empty ->
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Env.empty
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| Env_value(s, id, desc) ->
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Env.add_value id (Subst.value_description subst desc) (env_from_summary s subst)
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| Env_type(s, id, desc) ->
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Env.add_type id (Subst.type_declaration subst desc) (env_from_summary s subst)
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| Env_exception(s, id, desc) ->
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Env.add_exception id (Subst.exception_declaration subst desc) (env_from_summary s subst)
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| Env_module(s, id, desc) ->
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Env.add_module id (Subst.modtype subst desc) (env_from_summary s subst)
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| Env_modtype(s, id, desc) ->
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Env.add_modtype id (Subst.modtype_declaration subst desc) (env_from_summary s subst)
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| Env_class(s, id, desc) ->
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Env.add_class id (Subst.class_declaration subst desc) (env_from_summary s subst)
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| Env_cltype (s, id, desc) ->
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Env.add_cltype id (Subst.cltype_declaration subst desc) (env_from_summary s subst)
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| Env_open(s, path) ->
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let env = env_from_summary s subst in
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let path' = Subst.module_path subst path in
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let mty =
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try
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Env.find_module path' env
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with Not_found ->
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raise (Error (Module_not_found path'))
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in
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Env.open_signature Asttypes.Override path' (extract_sig env mty) env
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in
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Hashtbl.add env_cache (sum, subst) env;
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env
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let env_of_only_summary env =
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Env.env_of_only_summary env_from_summary env
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(* Error report *)
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open Format
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let report_error ppf = function
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| Module_not_found p ->
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fprintf ppf "@[Cannot find module %a@].@." Printtyp.path p
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