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71 lines
2.6 KiB
OCaml
71 lines
2.6 KiB
OCaml
(* This file is part of the Catala compiler, a specification language for tax and social benefits
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computation rules. Copyright (C) 2020 Inria, contributor: Nicolas Chataing
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<nicolas.chataing@ens.fr>
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Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
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in compliance with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software distributed under the License
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is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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or implied. See the License for the specific language governing permissions and limitations under
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the License. *)
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(** Scope dependencies computations using {{:http://ocamlgraph.lri.fr/} OCamlgraph} *)
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open Utils
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(** {1 Scope variables dependency graph} *)
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(** {2 Graph declaration} *)
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(** Vertices: scope variables or subscopes.
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The vertices of the scope dependency graph are either :
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- the variables of the scope ;
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- the subscopes of the scope.
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Indeed, during interpretation, subscopes are executed atomically. *)
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module Vertex : sig
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type t =
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| Var of Ast.ScopeVar.t * Ast.StateName.t option
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| SubScope of Scopelang.Ast.SubScopeName.t
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val format_t : Format.formatter -> t -> unit
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include Graph.Sig.COMPARABLE with type t := t
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end
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module Edge : Graph.Sig.ORDERED_TYPE_DFT with type t = Pos.t
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(** On the edges, the label is the position of the expression responsible for the use of the
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variable. In the graph, [x -> y] if [x] is used in the definition of [y].*)
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(** Module of the graph, provided by OCamlGraph *)
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module ScopeDependencies : Graph.Sig.P with type V.t = Vertex.t and type E.label = Edge.t
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(** {2 Graph computations} *)
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(** Returns an ordering of the scope variables and subscope compatible with the dependencies of the
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computation *)
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val correct_computation_ordering : ScopeDependencies.t -> Vertex.t list
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(** Returns an ordering of the scope variables and subscope compatible with the dependencies of the
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computation *)
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val check_for_cycle : Ast.scope -> ScopeDependencies.t -> unit
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(** Outputs an error in case of cycles. *)
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val build_scope_dependencies : Ast.scope -> ScopeDependencies.t
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(** Builds the dependency graph of a particular scope *)
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(** {1 Exceptions dependency graph} *)
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module ExceptionsDependencies : Graph.Sig.P with type V.t = Ast.RuleSet.t and type E.label = Edge.t
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val build_exceptions_graph : Ast.rule Ast.RuleMap.t -> Ast.ScopeDef.t -> ExceptionsDependencies.t
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val check_for_exception_cycle : ExceptionsDependencies.t -> unit
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