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72 lines
2.5 KiB
OCaml
72 lines
2.5 KiB
OCaml
(* This file is part of the Catala compiler, a specification language for tax
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and social benefits computation rules. Copyright (C) 2020 Inria, contributor:
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Denis Merigoux <denis.merigoux@inria.fr>
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Licensed under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy of
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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
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations under
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the License. *)
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open Catala_utils
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open Shared_ast
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module D = Dcalc.Ast
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module A = Ast
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let thunk_expr (type m) (e : m A.expr boxed) : m A.expr boxed =
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let dummy_var = Var.make "_" in
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let pos = Expr.pos e in
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let arg_t = Mark.add pos (TLit TUnit) in
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Expr.make_abs [| dummy_var |] e [arg_t] pos
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let translate_var : 'm D.expr Var.t -> 'm A.expr Var.t = Var.translate
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let rec translate_default
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(exceptions : 'm D.expr list)
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(just : 'm D.expr)
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(cons : 'm D.expr)
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(mark_default : 'm mark) : 'm A.expr boxed =
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let exceptions =
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List.map (fun except -> thunk_expr (translate_expr except)) exceptions
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in
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let pos = Expr.mark_pos mark_default in
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let exceptions =
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Expr.make_app
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(Expr.eop Op.HandleDefault
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[TAny, pos; TAny, pos; TAny, pos]
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(Expr.no_mark mark_default))
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[
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Expr.earray exceptions mark_default;
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thunk_expr (translate_expr just);
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thunk_expr (translate_expr cons);
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]
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pos
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in
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exceptions
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and translate_expr (e : 'm D.expr) : 'm A.expr boxed =
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let m = Mark.get e in
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match Mark.remove e with
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| EEmptyError -> Expr.eraise EmptyError m
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| EErrorOnEmpty arg ->
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Expr.ecatch (translate_expr arg) EmptyError
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(Expr.eraise NoValueProvided m)
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m
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| EDefault { excepts; just; cons } ->
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translate_default excepts just cons (Mark.get e)
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| EOp { op; tys } -> Expr.eop (Operator.translate op) tys m
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| ( ELit _ | EApp _ | EArray _ | EVar _ | EExternal _ | EAbs _ | EIfThenElse _
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| ETuple _ | ETupleAccess _ | EInj _ | EAssert _ | EStruct _
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| EStructAccess _ | EMatch _ ) as e ->
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Expr.map ~f:translate_expr (Mark.add m e)
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| _ -> .
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let translate_program (prg : 'm D.program) : 'm A.program =
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Bindlib.unbox (Program.map_exprs ~f:translate_expr ~varf:translate_var prg)
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