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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
open Util
open Names
open Univ
open Term
open Declarations
type globals = {
env_constants : constant_body Cmap.t;
env_inductives : mutual_inductive_body KNmap.t;
env_modules : module_body MPmap.t;
env_modtypes : module_type_body MPmap.t;
env_alias : module_path MPmap.t }
type stratification = {
env_universes : universes;
env_engagement : engagement option
}
type env = {
env_globals : globals;
env_named_context : named_context;
env_rel_context : rel_context;
env_stratification : stratification;
env_imports : Digest.t MPmap.t }
let empty_env = {
env_globals =
{ env_constants = Cmap.empty;
env_inductives = KNmap.empty;
env_modules = MPmap.empty;
env_modtypes = MPmap.empty;
env_alias = MPmap.empty };
env_named_context = [];
env_rel_context = [];
env_stratification =
{ env_universes = Univ.initial_universes;
env_engagement = None};
env_imports = MPmap.empty }
let engagement env = env.env_stratification.env_engagement
let universes env = env.env_stratification.env_universes
let named_context env = env.env_named_context
let rel_context env = env.env_rel_context
let set_engagement c env =
match env.env_stratification.env_engagement with
| Some c' -> if c=c' then env else error "Incompatible engagement"
| None ->
{ env with env_stratification =
{ env.env_stratification with env_engagement = Some c } }
(* Digests *)
let add_digest env dp digest =
{ env with env_imports = MPmap.add (MPfile dp) digest env.env_imports }
let lookup_digest env dp =
MPmap.find (MPfile dp) env.env_imports
(* Rel context *)
let lookup_rel n env =
let rec lookup_rel n sign =
match n, sign with
| 1, decl :: _ -> decl
| n, _ :: sign -> lookup_rel (n-1) sign
| _, [] -> raise Not_found in
lookup_rel n env.env_rel_context
let push_rel d env =
{ env with
env_rel_context = d :: env.env_rel_context }
let push_rel_context ctxt x = fold_rel_context push_rel ctxt ~init:x
let push_rec_types (lna,typarray,_) env =
let ctxt = array_map2_i (fun i na t -> (na, None, lift i t)) lna typarray in
Array.fold_left (fun e assum -> push_rel assum e) env ctxt
(* Named context *)
let push_named d env =
(* if not (env.env_rel_context = []) then raise (ASSERT env.env_rel_context);
assert (env.env_rel_context = []); *)
{ env with
env_named_context = d :: env.env_named_context }
let lookup_named id env =
let rec lookup_named id = function
| (id',_,_ as decl) :: _ when id=id' -> decl
| _ :: sign -> lookup_named id sign
| [] -> raise Not_found in
lookup_named id env.env_named_context
(* A local const is evaluable if it is defined *)
let named_type id env =
let (_,_,t) = lookup_named id env in t
(* Universe constraints *)
let add_constraints c env =
if c == Constraint.empty then
env
else
let s = env.env_stratification in
{ env with env_stratification =
{ s with env_universes = merge_constraints c s.env_universes } }
(* Global constants *)
let lookup_constant kn env =
Cmap.find kn env.env_globals.env_constants
let add_constant kn cs env =
let new_constants =
Cmap.add kn cs env.env_globals.env_constants in
let new_globals =
{ env.env_globals with
env_constants = new_constants } in
{ env with env_globals = new_globals }
(* constant_type gives the type of a constant *)
let constant_type env kn =
let cb = lookup_constant kn env in
cb.const_type
type const_evaluation_result = NoBody | Opaque
exception NotEvaluableConst of const_evaluation_result
let constant_value env kn =
let cb = lookup_constant kn env in
if cb.const_opaque then raise (NotEvaluableConst Opaque);
match cb.const_body with
| Some l_body -> force_constr l_body
| None -> raise (NotEvaluableConst NoBody)
let constant_opt_value env cst =
try Some (constant_value env cst)
with NotEvaluableConst _ -> None
(* A global const is evaluable if it is defined and not opaque *)
let evaluable_constant cst env =
try let _ = constant_value env cst in true
with Not_found | NotEvaluableConst _ -> false
(* Mutual Inductives *)
let lookup_mind kn env =
KNmap.find kn env.env_globals.env_inductives
let rec scrape_mind env kn =
match (lookup_mind kn env).mind_equiv with
| None -> kn
| Some kn' -> scrape_mind env kn'
let add_mind kn mib env =
let new_inds = KNmap.add kn mib env.env_globals.env_inductives in
let new_globals =
{ env.env_globals with
env_inductives = new_inds } in
{ env with env_globals = new_globals }
let rec mind_equiv env (kn1,i1) (kn2,i2) =
let rec equiv kn1 kn2 =
kn1 = kn2 ||
scrape_mind env kn1 = scrape_mind env kn2 in
i1 = i2 && equiv kn1 kn2
(* Modules *)
let add_modtype ln mtb env =
let new_modtypes = MPmap.add ln mtb env.env_globals.env_modtypes in
let new_globals =
{ env.env_globals with
env_modtypes = new_modtypes } in
{ env with env_globals = new_globals }
let shallow_add_module mp mb env =
let new_mods = MPmap.add mp mb env.env_globals.env_modules in
let new_globals =
{ env.env_globals with
env_modules = new_mods } in
{ env with env_globals = new_globals }
let register_alias mp1 mp2 env =
let new_alias = MPmap.add mp1 mp2 env.env_globals.env_alias in
let new_globals =
{ env.env_globals with
env_alias = new_alias } in
{ env with env_globals = new_globals }
let rec scrape_alias mp env =
try
let mp1 = MPmap.find mp env.env_globals.env_alias in
scrape_alias mp1 env
with
Not_found -> mp
let lookup_module mp env =
MPmap.find mp env.env_globals.env_modules
let lookup_modtype ln env =
MPmap.find ln env.env_globals.env_modtypes
|
