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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Util
open Names
open Term
open Sign
open Environ
open Safe_typing
open Summary
(* We introduce here the global environment of the system, and we declare it
as a synchronized table. *)
let global_env = ref empty_environment
let safe_env () = !global_env
let env () = env_of_safe_env !global_env
let env_is_empty () = is_empty !global_env
let _ =
declare_summary "Global environment"
{ freeze_function = (fun () -> !global_env);
unfreeze_function = (fun fr -> global_env := fr);
init_function = (fun () -> global_env := empty_environment) }
(* Then we export the functions of [Typing] on that environment. *)
let universes () = universes (env())
let named_context () = named_context (env())
let named_context_val () = named_context_val (env())
let push_named_assum a =
let (cst,env) = push_named_assum a !global_env in
global_env := env;
cst
let push_named_def d =
let (cst,env) = push_named_def d !global_env in
global_env := env;
cst
let add_thing add dir id thing =
let kn, newenv = add dir (label_of_id id) thing !global_env in
global_env := newenv;
kn
let add_constant = add_thing add_constant
let add_mind = add_thing add_mind
let add_modtype x y inl = add_thing (fun _ x y -> add_modtype x y inl) () x y
let add_module id me inl =
let l = label_of_id id in
let mp,resolve,new_env = add_module l me inl !global_env in
global_env := new_env;
mp,resolve
let add_constraints c = global_env := add_constraints c !global_env
let set_engagement c = global_env := set_engagement c !global_env
let add_include me is_module inl =
let resolve,newenv = add_include me is_module inl !global_env in
global_env := newenv;
resolve
let start_module id =
let l = label_of_id id in
let mp,newenv = start_module l !global_env in
global_env := newenv;
mp
let end_module fs id mtyo =
let l = label_of_id id in
let mp,resolve,newenv = end_module l mtyo !global_env in
Summary.unfreeze_summaries fs;
global_env := newenv;
mp,resolve
let add_module_parameter mbid mte inl =
let resolve,newenv = add_module_parameter mbid mte inl !global_env in
global_env := newenv;
resolve
let start_modtype id =
let l = label_of_id id in
let mp,newenv = start_modtype l !global_env in
global_env := newenv;
mp
let end_modtype fs id =
let l = label_of_id id in
let kn,newenv = end_modtype l !global_env in
Summary.unfreeze_summaries fs;
global_env := newenv;
kn
let pack_module () =
pack_module !global_env
let lookup_named id = lookup_named id (env())
let lookup_constant kn = lookup_constant kn (env())
let lookup_inductive ind = Inductive.lookup_mind_specif (env()) ind
let lookup_mind kn = lookup_mind kn (env())
let lookup_module mp = lookup_module mp (env())
let lookup_modtype kn = lookup_modtype kn (env())
let constant_of_delta_kn kn =
let resolver,resolver_param = (delta_of_senv !global_env) in
(* TODO : are resolver and resolver_param orthogonal ?
the effect of resolver is lost if resolver_param isn't
trivial at that spot. *)
Mod_subst.constant_of_delta resolver_param
(Mod_subst.constant_of_delta_kn resolver kn)
let mind_of_delta_kn kn =
let resolver,resolver_param = (delta_of_senv !global_env) in
(* TODO idem *)
Mod_subst.mind_of_delta resolver_param
(Mod_subst.mind_of_delta_kn resolver kn)
let exists_label id = exists_label id !global_env
let start_library dir =
let mp,newenv = start_library dir !global_env in
global_env := newenv;
mp
let export s = export !global_env s
let import cenv digest =
let mp,newenv = import cenv digest !global_env in
global_env := newenv;
mp
(*s Function to get an environment from the constants part of the global
environment and a given context. *)
let env_of_context hyps =
reset_with_named_context hyps (env())
open Libnames
let type_of_reference env = function
| VarRef id -> Environ.named_type id env
| ConstRef c -> Typeops.type_of_constant env c
| IndRef ind ->
let specif = Inductive.lookup_mind_specif env ind in
Inductive.type_of_inductive env specif
| ConstructRef cstr ->
let specif =
Inductive.lookup_mind_specif env (inductive_of_constructor cstr) in
Inductive.type_of_constructor cstr specif
let type_of_global t = type_of_reference (env ()) t
(* spiwack: register/unregister functions for retroknowledge *)
let register field value by_clause =
let entry = kind_of_term value in
let senv = Safe_typing.register !global_env field entry by_clause in
global_env := senv
|
