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
|
(************************************************************************)
(* 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: pretype_errors.ml 9217 2006-10-05 17:31:23Z notin $ *)
open Util
open Stdpp
open Names
open Sign
open Term
open Termops
open Environ
open Type_errors
open Rawterm
open Inductiveops
type pretype_error =
(* Old Case *)
| CantFindCaseType of constr
(* Unification *)
| OccurCheck of existential_key * constr
| NotClean of existential_key * constr * Evd.hole_kind
| UnsolvableImplicit of Evd.hole_kind
| CannotUnify of constr * constr
| CannotUnifyLocal of Environ.env * constr * constr * constr
| CannotUnifyBindingType of constr * constr
| CannotGeneralize of constr
| NoOccurrenceFound of constr
(* Pretyping *)
| VarNotFound of identifier
| UnexpectedType of constr * constr
| NotProduct of constr
exception PretypeError of env * pretype_error
let precatchable_exception = function
| Util.UserError _ | TypeError _ | PretypeError _
| Stdpp.Exc_located(_,(Util.UserError _ | TypeError _ |
Nametab.GlobalizationError _ | PretypeError _)) -> true
| _ -> false
let nf_evar = Reductionops.nf_evar
let j_nf_evar sigma j =
{ uj_val = nf_evar sigma j.uj_val;
uj_type = nf_evar sigma j.uj_type }
let jl_nf_evar sigma jl = List.map (j_nf_evar sigma) jl
let jv_nf_evar sigma = Array.map (j_nf_evar sigma)
let tj_nf_evar sigma {utj_val=v;utj_type=t} =
{utj_val=type_app (nf_evar sigma) v;utj_type=t}
let env_ise sigma env =
let sign = named_context_val env in
let ctxt = rel_context env in
let env0 = reset_with_named_context sign env in
Sign.fold_rel_context
(fun (na,b,ty) e ->
push_rel
(na, option_map (nf_evar sigma) b, nf_evar sigma ty)
e)
ctxt
~init:env0
(* This simplify the typing context of Cases clauses *)
(* hope it does not disturb other typing contexts *)
let contract env lc =
let l = ref [] in
let contract_context (na,c,t) env =
match c with
| Some c' when isRel c' ->
l := (substl !l c') :: !l;
env
| _ ->
let t' = substl !l t in
let c' = option_map (substl !l) c in
let na' = named_hd env t' na in
l := (mkRel 1) :: List.map (lift 1) !l;
push_rel (na',c',t') env in
let env = process_rel_context contract_context env in
(env, List.map (substl !l) lc)
let contract2 env a b = match contract env [a;b] with
| env, [a;b] -> env,a,b | _ -> assert false
let contract3 env a b c = match contract env [a;b;c] with
| env, [a;b;c] -> env,a,b,c | _ -> assert false
let raise_pretype_error (loc,ctx,sigma,te) =
Stdpp.raise_with_loc loc (PretypeError(env_ise sigma ctx,te))
let raise_located_type_error (loc,ctx,sigma,te) =
Stdpp.raise_with_loc loc (TypeError(env_ise sigma ctx,te))
let error_actual_type_loc loc env sigma {uj_val=c;uj_type=actty} expty =
let env, c, actty, expty = contract3 env c actty expty in
let j = j_nf_evar sigma {uj_val=c;uj_type=actty} in
raise_located_type_error
(loc, env, sigma, ActualType (j, nf_evar sigma expty))
let error_cant_apply_not_functional_loc loc env sigma rator randl =
let ja = Array.of_list (jl_nf_evar sigma randl) in
raise_located_type_error
(loc, env, sigma,
CantApplyNonFunctional (j_nf_evar sigma rator, ja))
let error_cant_apply_bad_type_loc loc env sigma (n,c,t) rator randl =
let ja = Array.of_list (jl_nf_evar sigma randl) in
raise_located_type_error
(loc, env, sigma,
CantApplyBadType
((n,nf_evar sigma c, nf_evar sigma t),
j_nf_evar sigma rator, ja))
let error_ill_formed_branch_loc loc env sigma c i actty expty =
let simp t = Reduction.nf_betaiota (nf_evar sigma t) in
raise_located_type_error
(loc, env, sigma,
IllFormedBranch (nf_evar sigma c,i,simp actty, simp expty))
let error_number_branches_loc loc env sigma cj expn =
raise_located_type_error
(loc, env, sigma,
NumberBranches (j_nf_evar sigma cj, expn))
let error_case_not_inductive_loc loc env sigma cj =
raise_located_type_error
(loc, env, sigma, CaseNotInductive (j_nf_evar sigma cj))
let error_ill_typed_rec_body_loc loc env sigma i na jl tys =
raise_located_type_error
(loc, env, sigma,
IllTypedRecBody (i,na,jv_nf_evar sigma jl,
Array.map (nf_evar sigma) tys))
let error_not_a_type_loc loc env sigma j =
raise_located_type_error (loc, env, sigma, NotAType (j_nf_evar sigma j))
(*s Implicit arguments synthesis errors. It is hard to find
a precise location. *)
let error_occur_check env sigma ev c =
let c = nf_evar sigma c in
raise (PretypeError (env_ise sigma env, OccurCheck (ev,c)))
let error_not_clean env sigma ev c (loc,k) =
let c = nf_evar sigma c in
raise_with_loc loc
(PretypeError (env_ise sigma env, NotClean (ev,c,k)))
let error_unsolvable_implicit loc env sigma e =
raise_with_loc loc (PretypeError (env_ise sigma env, UnsolvableImplicit e))
let error_cannot_unify env sigma (m,n) =
raise (PretypeError (env_ise sigma env,CannotUnify (m,n)))
let error_cannot_unify_local env sigma (e,m,n,sn) =
raise (PretypeError (env_ise sigma env,CannotUnifyLocal (e,m,n,sn)))
let error_cannot_coerce env sigma (m,n) =
raise (PretypeError (env_ise sigma env,CannotUnify (m,n)))
(*s Ml Case errors *)
let error_cant_find_case_type_loc loc env sigma expr =
raise_pretype_error
(loc, env, sigma, CantFindCaseType (nf_evar sigma expr))
(*s Pretyping errors *)
let error_unexpected_type_loc loc env sigma actty expty =
let env, actty, expty = contract2 env actty expty in
raise_pretype_error
(loc, env, sigma,
UnexpectedType (nf_evar sigma actty, nf_evar sigma expty))
let error_not_product_loc loc env sigma c =
raise_pretype_error (loc, env, sigma, NotProduct (nf_evar sigma c))
(*s Error in conversion from AST to rawterms *)
let error_var_not_found_loc loc s =
raise_pretype_error (loc, empty_env, Evd.empty, VarNotFound s)
|
