summaryrefslogtreecommitdiff
path: root/library/global.ml
blob: a0871f0c7c97348f5f5d86fe53a007cba7541103 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
(************************************************************************)
(*  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_objlabel id = exists_objlabel 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