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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \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 Environ
open Type_errors
type unification_error =
| OccurCheck of existential_key * constr
| NotClean of existential * env * constr (* Constr is a variable not in scope *)
| NotSameArgSize
| NotSameHead
| NoCanonicalStructure
| ConversionFailed of env * constr * constr (* Non convertible closed terms *)
| MetaOccurInBody of existential_key
| InstanceNotSameType of existential_key * env * types * types
| UnifUnivInconsistency of Univ.univ_inconsistency
| CannotSolveConstraint of Evd.evar_constraint * unification_error
| ProblemBeyondCapabilities
type position = (Id.t * Locus.hyp_location_flag) option
type position_reporting = (position * int) * constr
type subterm_unification_error = bool * position_reporting * position_reporting * (constr * constr * unification_error) option
type pretype_error =
(* Old Case *)
| CantFindCaseType of constr
(* Type inference unification *)
| ActualTypeNotCoercible of unsafe_judgment * types * unification_error
(* Tactic unification *)
| UnifOccurCheck of existential_key * constr
| UnsolvableImplicit of existential_key * Evd.unsolvability_explanation option
| CannotUnify of constr * constr * unification_error option
| CannotUnifyLocal of constr * constr * constr
| CannotUnifyBindingType of constr * constr
| CannotGeneralize of constr
| NoOccurrenceFound of constr * Id.t option
| CannotFindWellTypedAbstraction of constr * constr list * (env * type_error) option
| WrongAbstractionType of Name.t * constr * types * types
| AbstractionOverMeta of Name.t * Name.t
| NonLinearUnification of Name.t * constr
(* Pretyping *)
| VarNotFound of Id.t
| UnexpectedType of constr * constr
| NotProduct of constr
| TypingError of type_error
| CannotUnifyOccurrences of subterm_unification_error
| UnsatisfiableConstraints of
(existential_key * Evar_kinds.t) option * Evar.Set.t option
exception PretypeError of env * Evd.evar_map * pretype_error
let precatchable_exception = function
| CErrors.UserError _ | TypeError _ | PretypeError _
| Nametab.GlobalizationError _ -> true
| _ -> false
let raise_pretype_error (loc,env,sigma,te) =
Loc.raise loc (PretypeError(env,sigma,te))
let raise_located_type_error (loc,env,sigma,te) =
Loc.raise loc (PretypeError(env,sigma,TypingError te))
let error_actual_type_loc loc env sigma {uj_val=c;uj_type=actty} expty reason =
let j = {uj_val=c;uj_type=actty} in
raise_pretype_error
(loc, env, sigma, ActualTypeNotCoercible (j, expty, reason))
let error_cant_apply_not_functional_loc loc env sigma rator randl =
raise_located_type_error
(loc, env, sigma, CantApplyNonFunctional (rator, Array.of_list randl))
let error_cant_apply_bad_type_loc loc env sigma (n,c,t) rator randl =
raise_located_type_error
(loc, env, sigma,
CantApplyBadType ((n,c,t), rator, Array.of_list randl))
let error_ill_formed_branch_loc loc env sigma c i actty expty =
raise_located_type_error
(loc, env, sigma, IllFormedBranch (c, i, actty, expty))
let error_number_branches_loc loc env sigma cj expn =
raise_located_type_error (loc, env, sigma, NumberBranches (cj, expn))
let error_case_not_inductive_loc loc env sigma cj =
raise_located_type_error (loc, env, sigma, CaseNotInductive 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, jl, tys))
let error_not_a_type_loc loc env sigma j =
raise_located_type_error (loc, env, sigma, NotAType j)
(*s Implicit arguments synthesis errors. It is hard to find
a precise location. *)
let error_occur_check env sigma ev c =
raise (PretypeError (env, sigma, UnifOccurCheck (ev,c)))
let error_unsolvable_implicit loc env sigma evk explain =
Loc.raise loc
(PretypeError (env, sigma, UnsolvableImplicit (evk, explain)))
let error_cannot_unify_loc loc env sigma ?reason (m,n) =
Loc.raise loc (PretypeError (env, sigma,CannotUnify (m,n,reason)))
let error_cannot_unify env sigma ?reason (m,n) =
raise (PretypeError (env, sigma,CannotUnify (m,n,reason)))
let error_cannot_unify_local env sigma (m,n,sn) =
raise (PretypeError (env, sigma,CannotUnifyLocal (m,n,sn)))
let error_cannot_coerce env sigma (m,n) =
raise (PretypeError (env, sigma,CannotUnify (m,n,None)))
let error_cannot_find_well_typed_abstraction env sigma p l e =
raise (PretypeError (env, sigma,CannotFindWellTypedAbstraction (p,l,e)))
let error_wrong_abstraction_type env sigma na a p l =
raise (PretypeError (env, sigma,WrongAbstractionType (na,a,p,l)))
let error_abstraction_over_meta env sigma hdmeta metaarg =
let m = Evd.meta_name sigma hdmeta and n = Evd.meta_name sigma metaarg in
raise (PretypeError (env, sigma,AbstractionOverMeta (m,n)))
let error_non_linear_unification env sigma hdmeta t =
let m = Evd.meta_name sigma hdmeta in
raise (PretypeError (env, sigma,NonLinearUnification (m,t)))
(*s Ml Case errors *)
let error_cant_find_case_type_loc loc env sigma expr =
raise_pretype_error (loc, env, sigma, CantFindCaseType expr)
(*s Pretyping errors *)
let error_unexpected_type_loc loc env sigma actty expty =
raise_pretype_error (loc, env, sigma, UnexpectedType (actty, expty))
let error_not_product_loc loc env sigma c =
raise_pretype_error (loc, env, sigma, NotProduct c)
(*s Error in conversion from AST to glob_constr *)
let error_var_not_found_loc loc s =
raise_pretype_error (loc, empty_env, Evd.empty, VarNotFound s)
(*s Typeclass errors *)
let unsatisfiable_constraints env evd ev comp =
match ev with
| None ->
let err = UnsatisfiableConstraints (None, comp) in
raise (PretypeError (env,evd,err))
| Some ev ->
let loc, kind = Evd.evar_source ev evd in
let err = UnsatisfiableConstraints (Some (ev, kind), comp) in
Loc.raise loc (PretypeError (env,evd,err))
let unsatisfiable_exception exn =
match exn with
| PretypeError (_, _, UnsatisfiableConstraints _) -> true
| _ -> false
|
