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|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
open Names
open Constr
open Environ
open Reduction
(* Type errors. *)
type 'constr pguard_error =
(* Fixpoints *)
| NotEnoughAbstractionInFixBody
| RecursionNotOnInductiveType of 'constr
| RecursionOnIllegalTerm of int * (env * 'constr) * int list * int list
| NotEnoughArgumentsForFixCall of int
(* CoFixpoints *)
| CodomainNotInductiveType of 'constr
| NestedRecursiveOccurrences
| UnguardedRecursiveCall of 'constr
| RecCallInTypeOfAbstraction of 'constr
| RecCallInNonRecArgOfConstructor of 'constr
| RecCallInTypeOfDef of 'constr
| RecCallInCaseFun of 'constr
| RecCallInCaseArg of 'constr
| RecCallInCasePred of 'constr
| NotGuardedForm of 'constr
| ReturnPredicateNotCoInductive of 'constr
type guard_error = constr pguard_error
type arity_error =
| NonInformativeToInformative
| StrongEliminationOnNonSmallType
| WrongArity
type ('constr, 'types) ptype_error =
| UnboundRel of int
| UnboundVar of variable
| NotAType of ('constr, 'types) punsafe_judgment
| BadAssumption of ('constr, 'types) punsafe_judgment
| ReferenceVariables of Id.t * 'constr
| ElimArity of pinductive * Sorts.family list * 'constr * ('constr, 'types) punsafe_judgment
* (Sorts.family * Sorts.family * arity_error) option
| CaseNotInductive of ('constr, 'types) punsafe_judgment
| WrongCaseInfo of pinductive * case_info
| NumberBranches of ('constr, 'types) punsafe_judgment * int
| IllFormedBranch of 'constr * pconstructor * 'constr * 'constr
| Generalization of (Name.t * 'types) * ('constr, 'types) punsafe_judgment
| ActualType of ('constr, 'types) punsafe_judgment * 'types
| CantApplyBadType of
(int * 'constr * 'constr) * ('constr, 'types) punsafe_judgment * ('constr, 'types) punsafe_judgment array
| CantApplyNonFunctional of ('constr, 'types) punsafe_judgment * ('constr, 'types) punsafe_judgment array
| IllFormedRecBody of 'constr pguard_error * Name.t array * int * env * ('constr, 'types) punsafe_judgment array
| IllTypedRecBody of
int * Name.t array * ('constr, 'types) punsafe_judgment array * 'types array
| UnsatisfiedConstraints of Univ.Constraint.t
type type_error = (constr, types) ptype_error
exception TypeError of env * type_error
let nfj env {uj_val=c;uj_type=ct} =
{uj_val=c;uj_type=nf_betaiota env ct}
let error_unbound_rel env n =
raise (TypeError (env, UnboundRel n))
let error_unbound_var env v =
raise (TypeError (env, UnboundVar v))
let error_not_type env j =
raise (TypeError (env, NotAType j))
let error_assumption env j =
raise (TypeError (env, BadAssumption j))
let error_reference_variables env id c =
raise (TypeError (env, ReferenceVariables (id,c)))
let error_elim_arity env ind aritylst c pj okinds =
raise (TypeError (env, ElimArity (ind,aritylst,c,pj,okinds)))
let error_case_not_inductive env j =
raise (TypeError (env, CaseNotInductive j))
let error_number_branches env cj expn =
raise (TypeError (env, NumberBranches (nfj env cj,expn)))
let error_ill_formed_branch env c i actty expty =
raise (TypeError (env,
IllFormedBranch (c,i,nf_betaiota env actty, nf_betaiota env expty)))
let error_generalization env nvar c =
raise (TypeError (env, Generalization (nvar,c)))
let error_actual_type env j expty =
raise (TypeError (env, ActualType (j,expty)))
let error_cant_apply_not_functional env rator randl =
raise (TypeError (env, CantApplyNonFunctional (rator,randl)))
let error_cant_apply_bad_type env t rator randl =
raise (TypeError (env, CantApplyBadType (t,rator,randl)))
let error_ill_formed_rec_body env why lna i fixenv vdefj =
raise (TypeError (env, IllFormedRecBody (why,lna,i,fixenv,vdefj)))
let error_ill_typed_rec_body env i lna vdefj vargs =
raise (TypeError (env, IllTypedRecBody (i,lna,vdefj,vargs)))
let error_elim_explain kp ki =
let open Sorts in
match kp,ki with
| (InType | InSet), InProp -> NonInformativeToInformative
| InType, InSet -> StrongEliminationOnNonSmallType (* if Set impredicative *)
| _ -> WrongArity
let error_unsatisfied_constraints env c =
raise (TypeError (env, UnsatisfiedConstraints c))
|
