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50 lines
1.8 KiB
OCaml
50 lines
1.8 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: Denis Merigoux
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<denis.merigoux@inria.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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(** Global identifiers factories using a generative functor *)
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(** The information carried in global identifiers *)
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module type Info = sig
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type info
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val format_info : Format.formatter -> info -> unit
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end
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module MarkedString : Info with type info = string Pos.marked
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(** The only kind of information carried in Catala identifiers is the original string of the
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identifier annotated with the position where it is declared or used. *)
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(** Identifiers have abstract types, but are comparable so they can be used as keys in maps or sets.
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Their underlying information can be retrieved at any time. *)
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module type Id = sig
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type t
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type info
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val fresh : info -> t
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val get_info : t -> info
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val compare : t -> t -> int
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val format_t : Format.formatter -> t -> unit
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val hash : t -> int
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end
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(** This is the generative functor that ensures that two modules resulting from two different calls
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to [Make] will be viewed as different types [t] by the OCaml typechecker. Prevents mixing up
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different sorts of identifiers. *)
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module Make (X : Info) () : Id with type info = X.info
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