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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2015 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Names
open Term
open Environ
open Reduction
(* Type errors. *)
type guard_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 arity_error =
| NonInformativeToInformative
| StrongEliminationOnNonSmallType
| WrongArity
type type_error =
| UnboundRel of int
| UnboundVar of variable
| NotAType of unsafe_judgment
| BadAssumption of unsafe_judgment
| ReferenceVariables of identifier * constr
| ElimArity of pinductive * sorts_family list * constr * unsafe_judgment
* (sorts_family * sorts_family * arity_error) option
| CaseNotInductive of unsafe_judgment
| WrongCaseInfo of pinductive * case_info
| NumberBranches of unsafe_judgment * int
| IllFormedBranch of constr * pconstructor * constr * constr
| Generalization of (Name.t * types) * unsafe_judgment
| ActualType of unsafe_judgment * types
| CantApplyBadType of
(int * constr * constr) * unsafe_judgment * unsafe_judgment array
| CantApplyNonFunctional of unsafe_judgment * unsafe_judgment array
| IllFormedRecBody of guard_error * Name.t array * int * env * unsafe_judgment array
| IllTypedRecBody of
int * Name.t array * unsafe_judgment array * types array
| UnsatisfiedConstraints of Univ.constraints
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 =
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))
|
