From a1bdaf0635b5d5b9e007662f324dd526ba0fe8d3 Mon Sep 17 00:00:00 2001
From: Maxime Dénès
Date: Tue, 9 Oct 2018 18:21:04 +0200
Subject: [checker] Refactor by sharing code with the kernel

For historical reasons, the checker was duplicating a lot of code of the
kernel. The main differences I found were bug fixes that had not been
backported.

With this patch, the checker uses the kernel as a library to serve the
same purpose as before: validation of a `.vo` file, re-typechecking all
definitions a posteriori.

We also rename some files from the checker so that they don't clash with
kernel files.
---
 checker/type_errors.ml | 115 -------------------------------------------------
 1 file changed, 115 deletions(-)
 delete mode 100644 checker/type_errors.ml

(limited to 'checker/type_errors.ml')

diff --git a/checker/type_errors.ml b/checker/type_errors.ml
deleted file mode 100644
index 5079643783..0000000000
--- a/checker/type_errors.ml
+++ /dev/null
@@ -1,115 +0,0 @@
-(************************************************************************)
-(*         *   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 Cic
-open Environ
-
-type unsafe_judgment = constr * constr
-
-let nf_betaiota c = c
-
-(* 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 constr
-  | ElimArity of pinductive * sorts_family list * constr * unsafe_judgment
-      * (sorts_family * sorts_family * arity_error) option
-  | CaseNotInductive of unsafe_judgment
-  | WrongCaseInfo of inductive * case_info
-  | NumberBranches of unsafe_judgment * int
-  | IllFormedBranch of constr * int * constr * constr
-  | Generalization of (Name.t * constr) * unsafe_judgment
-  | ActualType of unsafe_judgment * constr
-  | 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
-  | IllTypedRecBody of
-      int * Name.t array * unsafe_judgment array * constr array
-  | UnsatisfiedConstraints of Univ.constraints
-
-exception TypeError of env * type_error
-
-let nfj (c,ct) = (c, nf_betaiota 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 =
-  raise (TypeError (env, ReferenceVariables id))
-
-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 cj,expn)))
-
-let error_ill_formed_branch env c i actty expty =
-  raise (TypeError (env,
-    IllFormedBranch (c,i,nf_betaiota actty, nf_betaiota expty)))
-
-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 =
-  raise (TypeError (env, IllFormedRecBody (why,lna,i)))
-
-let error_ill_typed_rec_body env i lna vdefj vargs =
-  raise (TypeError (env, IllTypedRecBody (i,lna,vdefj,vargs)))
-
-let error_unsatisfied_constraints env c =
-  raise (TypeError (env, UnsatisfiedConstraints c))
-- 
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