catala/compiler/verification/conditions.mli
2022-08-29 10:57:21 +02:00

49 lines
2.0 KiB
OCaml

(* This file is part of the Catala compiler, a specification language for tax
and social benefits computation rules. Copyright (C) 2022 Inria, contributor:
Denis Merigoux <denis.merigoux@inria.fr>, Alain Delaët
<alain.delaet--tixeuil@inria.fr>
Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy of
the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations under
the License. *)
(** Generates verification conditions from scope definitions *)
open Utils
open Shared_ast
type verification_condition_kind =
| NoEmptyError
(** This verification condition checks whether a definition never returns
an empty error *)
| NoOverlappingExceptions
(** This verification condition checks whether a definition never returns
a conflict error *)
type verification_condition = {
vc_guard : typed Dcalc.Ast.expr;
(** This expression should have type [bool]*)
vc_kind : verification_condition_kind;
vc_scope : ScopeName.t;
vc_variable : typed Dcalc.Ast.naked_expr Var.t Marked.pos;
vc_free_vars_typ : (typed Dcalc.Ast.naked_expr, typ) Var.Map.t;
(** Types of the locally free variables in [vc_guard]. The types of other
free variables linked to scope variables can be obtained with
[Dcalc.Ast.variable_types]. *)
}
val generate_verification_conditions :
typed Dcalc.Ast.program -> ScopeName.t option -> verification_condition list
(** [generate_verification_conditions p None] will generate the verification
conditions for all the variables of all the scopes of the program [p], while
[generate_verification_conditions p (Some s)] will focus only on the
variables of scope [s]. *)