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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id$ *)
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 _ =
declare_summary "Global environment"
{ freeze_function = (fun () -> !global_env);
unfreeze_function = (fun fr -> global_env := fr);
init_function = (fun () -> global_env := empty_environment);
survive_module = true;
survive_section = false }
(* Then we export the functions of [Typing] on that environment. *)
let universes () = universes (env())
let named_context () = named_context (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 kn thing =
let _,dir,l = repr_kn kn in
let kn',newenv = add dir l thing !global_env in
if kn = kn' then
global_env := newenv
else
anomaly "Kernel names do not match."
*)
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 = add_thing (fun _ -> add_modtype) ()
let add_module = add_thing (fun _ -> add_module) ()
let add_constraints c = global_env := add_constraints c !global_env
let set_engagement c = global_env := set_engagement c !global_env
let start_module id params mtyo =
let l = label_of_id id in
let mp,newenv = start_module l params mtyo !global_env in
global_env := newenv;
mp
let end_module id =
let l = label_of_id id in
let mp,newenv = end_module l !global_env in
global_env := newenv;
mp
let start_modtype id params =
let l = label_of_id id in
let mp,newenv = start_modtype l params !global_env in
global_env := newenv;
mp
let end_modtype id =
let l = label_of_id id in
let kn,newenv = end_modtype l !global_env in
global_env := newenv;
kn
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 start_library dir =
let mp,newenv = start_library dir !global_env in
global_env := newenv;
mp
let export s = snd (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 -> let (_,_,t) = Environ.lookup_named id env in t
| ConstRef c -> Environ.constant_type env c
| IndRef ind ->
let specif = Inductive.lookup_mind_specif env ind in
Inductive.type_of_inductive 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
|
