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https://github.com/CatalaLang/catala.git
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1391 lines
52 KiB
OCaml
1391 lines
52 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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Nicolas Chataing <nicolas.chataing@ens.fr> 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
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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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module S = Surface.Ast
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module SurfacePrint = Surface.Print
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open Shared_ast
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module Runtime = Runtime_ocaml.Runtime
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(** Translation from {!module: Surface.Ast} to {!module: Desugaring.Ast}.
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- Removes syntactic sugars
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- Separate code from legislation *)
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(** {1 Translating expressions} *)
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(* Resolves the operator kinds into the expected operator operand types.
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This gives only partial typing information, in the case it is enforced using
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the operator suffixes for explicit typing. See {!modules:
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Shared_ast.Operator} for detail. *)
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let translate_binop : Surface.Ast.binop -> Pos.t -> Ast.expr boxed =
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fun op pos ->
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let op_expr op tys =
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Expr.eop op (List.map (Marked.mark pos) tys) (Untyped { pos })
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in
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match op with
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| S.And -> op_expr And [TLit TBool; TLit TBool]
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| S.Or -> op_expr Or [TLit TBool; TLit TBool]
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| S.Xor -> op_expr Xor [TLit TBool; TLit TBool]
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| S.Add k ->
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op_expr Add
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(match k with
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| S.KPoly -> [TAny; TAny]
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| S.KInt -> [TLit TInt; TLit TInt]
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| S.KDec -> [TLit TRat; TLit TRat]
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| S.KMoney -> [TLit TMoney; TLit TMoney]
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| S.KDate -> [TLit TDate; TLit TDuration]
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| S.KDuration -> [TLit TDuration; TLit TDuration])
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| S.Sub k ->
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op_expr Sub
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(match k with
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| S.KPoly -> [TAny; TAny]
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| S.KInt -> [TLit TInt; TLit TInt]
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| S.KDec -> [TLit TRat; TLit TRat]
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| S.KMoney -> [TLit TMoney; TLit TMoney]
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| S.KDate -> [TLit TDate; TLit TDate]
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| S.KDuration -> [TLit TDuration; TLit TDuration])
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| S.Mult k ->
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op_expr Mult
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(match k with
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| S.KPoly -> [TAny; TAny]
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| S.KInt -> [TLit TInt; TLit TInt]
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| S.KDec -> [TLit TRat; TLit TRat]
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| S.KMoney -> [TLit TMoney; TLit TRat]
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| S.KDate ->
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Errors.raise_spanned_error pos
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"This operator doesn't exist, dates can't be multiplied"
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| S.KDuration -> [TLit TDuration; TLit TInt])
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| S.Div k ->
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op_expr Div
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(match k with
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| S.KPoly -> [TAny; TAny]
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| S.KInt -> [TLit TInt; TLit TInt]
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| S.KDec -> [TLit TRat; TLit TRat]
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| S.KMoney -> [TLit TMoney; TLit TMoney]
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| S.KDate ->
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Errors.raise_spanned_error pos
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"This operator doesn't exist, dates can't be divided"
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| S.KDuration -> [TLit TDuration; TLit TDuration])
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| S.Lt k | S.Lte k | S.Gt k | S.Gte k ->
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op_expr
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(match op with
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| S.Lt _ -> Lt
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| S.Lte _ -> Lte
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| S.Gt _ -> Gt
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| S.Gte _ -> Gte
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| _ -> assert false)
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(match k with
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| S.KPoly -> [TAny; TAny]
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| S.KInt -> [TLit TInt; TLit TInt]
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| S.KDec -> [TLit TRat; TLit TRat]
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| S.KMoney -> [TLit TMoney; TLit TMoney]
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| S.KDate -> [TLit TDate; TLit TDate]
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| S.KDuration -> [TLit TDuration; TLit TDuration])
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| S.Eq ->
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op_expr Eq [TAny; TAny]
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(* This is a truly polymorphic operator, not an overload *)
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| S.Neq -> assert false (* desugared already *)
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| S.Concat -> op_expr Concat [TArray (TAny, pos); TArray (TAny, pos)]
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let translate_unop (op : Surface.Ast.unop) pos : Ast.expr boxed =
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let op_expr op ty = Expr.eop op [Marked.mark pos ty] (Untyped { pos }) in
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match op with
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| S.Not -> op_expr Not (TLit TBool)
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| S.Minus k ->
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op_expr Minus
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(match k with
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| S.KPoly -> TAny
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| S.KInt -> TLit TInt
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| S.KDec -> TLit TRat
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| S.KMoney -> TLit TMoney
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| S.KDate ->
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Errors.raise_spanned_error pos
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"This operator doesn't exist, dates can't be negative"
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| S.KDuration -> TLit TDuration)
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let disambiguate_constructor
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(ctxt : Name_resolution.context)
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(constructor : (S.path * S.uident Marked.pos) Marked.pos list)
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(pos : Pos.t) : EnumName.t * EnumConstructor.t =
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let path, constructor =
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match constructor with
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| [c] -> Marked.unmark c
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| _ ->
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Errors.raise_spanned_error pos
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"The deep pattern matching syntactic sugar is not yet supported"
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in
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let possible_c_uids =
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try IdentName.Map.find (Marked.unmark constructor) ctxt.constructor_idmap
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with Not_found ->
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Errors.raise_spanned_error
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(Marked.get_mark constructor)
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"The name of this constructor has not been defined before, maybe it is \
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a typo?"
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in
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match path with
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| [] ->
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if EnumName.Map.cardinal possible_c_uids > 1 then
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Errors.raise_spanned_error
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(Marked.get_mark constructor)
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"This constructor name is ambiguous, it can belong to %a. Disambiguate \
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it by prefixing it with the enum name."
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(Format.pp_print_list
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~pp_sep:(fun fmt () -> Format.fprintf fmt " or ")
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(fun fmt (s_name, _) ->
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Format.fprintf fmt "%a" EnumName.format_t s_name))
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(EnumName.Map.bindings possible_c_uids);
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EnumName.Map.choose possible_c_uids
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| [enum] -> (
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try
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(* The path is fully qualified *)
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let e_uid = Name_resolution.get_enum ctxt enum in
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try
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let c_uid = EnumName.Map.find e_uid possible_c_uids in
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e_uid, c_uid
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with Not_found ->
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Errors.raise_spanned_error pos "Enum %s does not contain case %s"
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(Marked.unmark enum)
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(Marked.unmark constructor)
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with Not_found ->
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Errors.raise_spanned_error (Marked.get_mark enum)
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"Enum %s has not been defined before" (Marked.unmark enum))
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| _ -> Errors.raise_spanned_error pos "Qualified paths are not supported yet"
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let int100 = Runtime.integer_of_int 100
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let rat100 = Runtime.decimal_of_integer int100
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(** The parser allows any combination of logical operators with right
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associativity. We actually want to reject anything that mixes operators
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without parens, so that is handled here. *)
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let rec check_formula (op, pos_op) e =
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match Marked.unmark e with
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| S.Binop ((((S.And | S.Or | S.Xor) as op1), pos_op1), e1, e2) ->
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if op = S.Xor || op <> op1 then
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(* Xor is mathematically associative, but without a useful semantics ([a
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xor b xor c] is most likely an error since it's true for [a = b = c =
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true]) *)
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Errors.raise_multispanned_error
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[None, pos_op; None, pos_op1]
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"Please add parentheses to explicit which of these operators should be \
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applied first";
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check_formula (op1, pos_op1) e1;
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check_formula (op1, pos_op1) e2
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| _ -> ()
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(** Usage: [translate_expr scope ctxt naked_expr]
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Translates [expr] into its desugared equivalent. [scope] is used to
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disambiguate the scope and subscopes variables than occur in the expression,
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[None] is assumed to mean a toplevel definition *)
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let rec translate_expr
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(scope : ScopeName.t option)
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(inside_definition_of : Ast.ScopeDef.t Marked.pos option)
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(ctxt : Name_resolution.context)
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(expr : Surface.Ast.expression) : Ast.expr boxed =
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let scope_vars =
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match scope with
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| None -> IdentName.Map.empty
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| Some s -> (ScopeName.Map.find s ctxt.scopes).var_idmap
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in
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let rec_helper = translate_expr scope inside_definition_of ctxt in
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let pos = Marked.get_mark expr in
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let emark = Untyped { pos } in
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match Marked.unmark expr with
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| Paren e -> rec_helper e
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| Binop
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( (Surface.Ast.And, _pos_op),
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( TestMatchCase (e1_sub, ((constructors, Some binding), pos_pattern)),
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_pos_e1 ),
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e2 ) ->
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(* This sugar corresponds to [e is P x && e'] and should desugar to [match e
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with P x -> e' | _ -> false] *)
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let enum_uid, c_uid =
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disambiguate_constructor ctxt constructors pos_pattern
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in
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let cases =
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EnumConstructor.Map.mapi
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(fun c_uid' tau ->
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if EnumConstructor.compare c_uid c_uid' <> 0 then
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let nop_var = Var.make "_" in
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Expr.make_abs [| nop_var |]
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(Expr.elit (LBool false) emark)
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[tau] pos
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else
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let ctxt, binding_var =
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Name_resolution.add_def_local_var ctxt (Marked.unmark binding)
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in
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let e2 = translate_expr scope inside_definition_of ctxt e2 in
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Expr.make_abs [| binding_var |] e2 [tau] pos)
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(EnumName.Map.find enum_uid ctxt.enums)
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in
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Expr.ematch
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(translate_expr scope inside_definition_of ctxt e1_sub)
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enum_uid cases emark
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| Binop ((((S.And | S.Or | S.Xor), _) as op), e1, e2) ->
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check_formula op e1;
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check_formula op e2;
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let op_term = translate_binop (Marked.unmark op) (Marked.get_mark op) in
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Expr.eapp op_term [rec_helper e1; rec_helper e2] emark
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| IfThenElse (e_if, e_then, e_else) ->
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Expr.eifthenelse (rec_helper e_if) (rec_helper e_then) (rec_helper e_else)
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emark
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| Binop ((S.Neq, posn), e1, e2) ->
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(* Neq is just sugar *)
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rec_helper (Unop ((S.Not, posn), (Binop ((S.Eq, posn), e1, e2), posn)), pos)
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| Binop ((op, pos), e1, e2) ->
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let op_term = translate_binop op pos in
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Expr.eapp op_term [rec_helper e1; rec_helper e2] emark
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| Unop ((op, pos), e) ->
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let op_term = translate_unop op pos in
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Expr.eapp op_term [rec_helper e] emark
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| Literal l ->
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let lit =
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match l with
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| LNumber ((Int i, _), None) -> LInt (Runtime.integer_of_string i)
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| LNumber ((Int i, _), Some (Percent, _)) ->
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LRat Runtime.(Oper.o_div_rat_rat (decimal_of_string i) rat100)
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| LNumber ((Dec (i, f), _), None) ->
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LRat Runtime.(decimal_of_string (i ^ "." ^ f))
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| LNumber ((Dec (i, f), _), Some (Percent, _)) ->
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LRat
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Runtime.(Oper.o_div_rat_rat (decimal_of_string (i ^ "." ^ f)) rat100)
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| LBool b -> LBool b
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| LMoneyAmount i ->
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LMoney
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Runtime.(
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money_of_cents_integer
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(Oper.o_add_int_int
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(Oper.o_mult_int_int
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(integer_of_string i.money_amount_units)
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int100)
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(integer_of_string i.money_amount_cents)))
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| LNumber ((Int i, _), Some (Year, _)) ->
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LDuration (Runtime.duration_of_numbers (int_of_string i) 0 0)
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| LNumber ((Int i, _), Some (Month, _)) ->
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LDuration (Runtime.duration_of_numbers 0 (int_of_string i) 0)
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| LNumber ((Int i, _), Some (Day, _)) ->
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LDuration (Runtime.duration_of_numbers 0 0 (int_of_string i))
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| LNumber ((Dec (_, _), _), Some ((Year | Month | Day), _)) ->
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Errors.raise_spanned_error pos
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"Impossible to specify decimal amounts of days, months or years"
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| LDate date ->
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if date.literal_date_month > 12 then
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Errors.raise_spanned_error pos
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"There is an error in this date: the month number is bigger than 12";
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if date.literal_date_day > 31 then
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Errors.raise_spanned_error pos
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"There is an error in this date: the day number is bigger than 31";
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LDate
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(try
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Runtime.date_of_numbers date.literal_date_year
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date.literal_date_month date.literal_date_day
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with Runtime.ImpossibleDate ->
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Errors.raise_spanned_error pos
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"There is an error in this date, it does not correspond to a \
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correct calendar day")
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in
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Expr.elit lit emark
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| Ident ([], (x, pos)) -> (
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(* first we check whether this is a local var, then we resort to scope-wide
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variables, then global variables *)
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match IdentName.Map.find_opt x ctxt.local_var_idmap with
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| Some uid ->
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Expr.make_var uid emark
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(* the whole box thing is to accomodate for this case *)
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| None -> (
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match IdentName.Map.find_opt x scope_vars with
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| Some (ScopeVar uid) ->
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(* If the referenced variable has states, then here are the rules to
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desambiguate. In general, only the last state can be referenced.
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Except if defining a state of the same variable, then it references
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the previous state in the chain. *)
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let x_sig = ScopeVar.Map.find uid ctxt.var_typs in
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let x_state =
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match x_sig.var_sig_states_list with
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| [] -> None
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| states -> (
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match inside_definition_of with
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| Some (Var (x'_uid, sx'), _) when ScopeVar.compare uid x'_uid = 0
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-> (
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match sx' with
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| None ->
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failwith
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"inconsistent state: inside a definition of a variable with \
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no state but variable has states"
|
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| Some inside_def_state ->
|
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if StateName.compare inside_def_state (List.hd states) = 0 then
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Errors.raise_spanned_error pos
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"It is impossible to refer to the variable you are \
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defining when defining its first state."
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else
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(* Tricky: we have to retrieve in the list the previous state
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with respect to the state that we are defining. *)
|
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let correct_state = ref None in
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ignore
|
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(List.fold_left
|
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(fun previous_state state ->
|
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if StateName.equal inside_def_state state then
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correct_state := previous_state;
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Some state)
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None states);
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!correct_state)
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| _ ->
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(* we take the last state in the chain *)
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Some (List.hd (List.rev states)))
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in
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Expr.elocation (DesugaredScopeVar ((uid, pos), x_state)) emark
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| Some (SubScope _)
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(* Note: allowing access to a global variable with the same name as a
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subscope is disputable, but I see no good reason to forbid it either *)
|
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| None -> (
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match IdentName.Map.find_opt x ctxt.topdefs with
|
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| Some v ->
|
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Expr.elocation
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(ToplevelVar (v, Marked.get_mark (TopdefName.get_info v)))
|
|
emark
|
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| None ->
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Name_resolution.raise_unknown_identifier
|
|
"for a local, scope-wide or global variable" (x, pos))))
|
|
| Ident (_path, _x) ->
|
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Errors.raise_spanned_error pos "Qualified paths are not supported yet"
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|
| Dotted (e, ((path, x), _ppos)) -> (
|
|
match path, Marked.unmark e with
|
|
| [], Ident ([], (y, _))
|
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when Option.fold scope ~none:false ~some:(fun s ->
|
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Name_resolution.is_subscope_uid s ctxt y) ->
|
|
(* In this case, y.x is a subscope variable *)
|
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let subscope_uid, subscope_real_uid =
|
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match IdentName.Map.find y scope_vars with
|
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| SubScope (sub, sc) -> sub, sc
|
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| ScopeVar _ -> assert false
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in
|
|
let subscope_var_uid =
|
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Name_resolution.get_var_uid subscope_real_uid ctxt x
|
|
in
|
|
Expr.elocation
|
|
(SubScopeVar
|
|
(subscope_real_uid, (subscope_uid, pos), (subscope_var_uid, pos)))
|
|
emark
|
|
| _ ->
|
|
(* In this case e.x is the struct field x access of expression e *)
|
|
let e = translate_expr scope inside_definition_of ctxt e in
|
|
let str =
|
|
match path with
|
|
| [] -> None
|
|
| [c] -> (
|
|
try Some (Name_resolution.get_struct ctxt c)
|
|
with Not_found ->
|
|
Errors.raise_spanned_error (Marked.get_mark c)
|
|
"Structure %s was not declared" (Marked.unmark c))
|
|
| _ ->
|
|
Errors.raise_spanned_error pos "Qualified paths are not supported yet"
|
|
in
|
|
Expr.edstructaccess e (Marked.unmark x) str emark)
|
|
| FunCall (f, args) ->
|
|
Expr.eapp (rec_helper f) (List.map rec_helper args) emark
|
|
| ScopeCall ((([], sc_name), _), fields) ->
|
|
if scope = None then
|
|
Errors.raise_spanned_error pos
|
|
"Scope calls are not allowed outside of a scope";
|
|
let called_scope = Name_resolution.get_scope ctxt sc_name in
|
|
let scope_def = ScopeName.Map.find called_scope ctxt.scopes in
|
|
let in_struct =
|
|
List.fold_left
|
|
(fun acc (fld_id, e) ->
|
|
let var =
|
|
match
|
|
IdentName.Map.find_opt (Marked.unmark fld_id) scope_def.var_idmap
|
|
with
|
|
| Some (ScopeVar v) -> v
|
|
| Some (SubScope _) | None ->
|
|
Errors.raise_multispanned_error
|
|
[
|
|
None, Marked.get_mark fld_id;
|
|
( Some
|
|
(Format.asprintf "Scope %a declared here"
|
|
ScopeName.format_t called_scope),
|
|
Marked.get_mark (ScopeName.get_info called_scope) );
|
|
]
|
|
"Scope %a has no input variable %a" ScopeName.format_t
|
|
called_scope Print.lit_style (Marked.unmark fld_id)
|
|
in
|
|
ScopeVar.Map.update var
|
|
(function
|
|
| None -> Some (rec_helper e)
|
|
| Some _ ->
|
|
Errors.raise_spanned_error (Marked.get_mark fld_id)
|
|
"Duplicate definition of scope input variable '%a'"
|
|
ScopeVar.format_t var)
|
|
acc)
|
|
ScopeVar.Map.empty fields
|
|
in
|
|
Expr.escopecall called_scope in_struct emark
|
|
| ScopeCall (((_, _sc_name), _), _fields) ->
|
|
Errors.raise_spanned_error pos "Qualified paths are not supported yet"
|
|
| LetIn (x, e1, e2) ->
|
|
let ctxt, v = Name_resolution.add_def_local_var ctxt (Marked.unmark x) in
|
|
let tau = TAny, Marked.get_mark x in
|
|
(* This type will be resolved in Scopelang.Desambiguation *)
|
|
let fn =
|
|
Expr.make_abs [| v |]
|
|
(translate_expr scope inside_definition_of ctxt e2)
|
|
[tau] pos
|
|
in
|
|
Expr.eapp fn [rec_helper e1] emark
|
|
| StructLit ((([], s_name), _), fields) ->
|
|
let s_uid =
|
|
match IdentName.Map.find_opt (Marked.unmark s_name) ctxt.typedefs with
|
|
| Some (Name_resolution.TStruct s_uid) -> s_uid
|
|
| _ ->
|
|
Errors.raise_spanned_error (Marked.get_mark s_name)
|
|
"This identifier should refer to a struct name"
|
|
in
|
|
|
|
let s_fields =
|
|
List.fold_left
|
|
(fun s_fields (f_name, f_e) ->
|
|
let f_uid =
|
|
try
|
|
StructName.Map.find s_uid
|
|
(IdentName.Map.find (Marked.unmark f_name) ctxt.field_idmap)
|
|
with Not_found ->
|
|
Errors.raise_spanned_error (Marked.get_mark f_name)
|
|
"This identifier should refer to a field of struct %s"
|
|
(Marked.unmark s_name)
|
|
in
|
|
(match StructField.Map.find_opt f_uid s_fields with
|
|
| None -> ()
|
|
| Some e_field ->
|
|
Errors.raise_multispanned_error
|
|
[None, Marked.get_mark f_e; None, Expr.pos e_field]
|
|
"The field %a has been defined twice:" StructField.format_t f_uid);
|
|
let f_e = translate_expr scope inside_definition_of ctxt f_e in
|
|
StructField.Map.add f_uid f_e s_fields)
|
|
StructField.Map.empty fields
|
|
in
|
|
let expected_s_fields = StructName.Map.find s_uid ctxt.structs in
|
|
StructField.Map.iter
|
|
(fun expected_f _ ->
|
|
if not (StructField.Map.mem expected_f s_fields) then
|
|
Errors.raise_spanned_error pos
|
|
"Missing field for structure %a: \"%a\"" StructName.format_t s_uid
|
|
StructField.format_t expected_f)
|
|
expected_s_fields;
|
|
|
|
Expr.estruct s_uid s_fields emark
|
|
| StructLit (((_, _s_name), _), _fields) ->
|
|
Errors.raise_spanned_error pos "Qualified paths are not supported yet"
|
|
| EnumInject (((path, (constructor, pos_constructor)), _), payload) -> (
|
|
let possible_c_uids =
|
|
try IdentName.Map.find constructor ctxt.constructor_idmap
|
|
with Not_found ->
|
|
Errors.raise_spanned_error pos_constructor
|
|
"The name of this constructor has not been defined before, maybe it \
|
|
is a typo?"
|
|
in
|
|
let mark_constructor = Untyped { pos = pos_constructor } in
|
|
|
|
match path with
|
|
| [] ->
|
|
if
|
|
(* No constructor name was specified *)
|
|
EnumName.Map.cardinal possible_c_uids > 1
|
|
then
|
|
Errors.raise_spanned_error pos_constructor
|
|
"This constructor name is ambiguous, it can belong to %a. \
|
|
Desambiguate it by prefixing it with the enum name."
|
|
(Format.pp_print_list
|
|
~pp_sep:(fun fmt () -> Format.fprintf fmt " or ")
|
|
(fun fmt (s_name, _) ->
|
|
Format.fprintf fmt "%a" EnumName.format_t s_name))
|
|
(EnumName.Map.bindings possible_c_uids)
|
|
else
|
|
let e_uid, c_uid = EnumName.Map.choose possible_c_uids in
|
|
let payload =
|
|
Option.map (translate_expr scope inside_definition_of ctxt) payload
|
|
in
|
|
Expr.einj
|
|
(match payload with
|
|
| Some e' -> e'
|
|
| None -> Expr.elit LUnit mark_constructor)
|
|
c_uid e_uid emark
|
|
| [enum] -> (
|
|
try
|
|
(* The path has been fully qualified *)
|
|
let e_uid = Name_resolution.get_enum ctxt enum in
|
|
try
|
|
let c_uid = EnumName.Map.find e_uid possible_c_uids in
|
|
let payload =
|
|
Option.map (translate_expr scope inside_definition_of ctxt) payload
|
|
in
|
|
Expr.einj
|
|
(match payload with
|
|
| Some e' -> e'
|
|
| None -> Expr.elit LUnit mark_constructor)
|
|
c_uid e_uid emark
|
|
with Not_found ->
|
|
Errors.raise_spanned_error pos "Enum %s does not contain case %s"
|
|
(Marked.unmark enum) constructor
|
|
with Not_found ->
|
|
Errors.raise_spanned_error (Marked.get_mark enum)
|
|
"Enum %s has not been defined before" (Marked.unmark enum))
|
|
| _ ->
|
|
Errors.raise_spanned_error pos "Qualified paths are not supported yet")
|
|
| MatchWith (e1, (cases, _cases_pos)) ->
|
|
let e1 = translate_expr scope inside_definition_of ctxt e1 in
|
|
let cases_d, e_uid =
|
|
disambiguate_match_and_build_expression scope inside_definition_of ctxt
|
|
cases
|
|
in
|
|
Expr.ematch e1 e_uid cases_d emark
|
|
| TestMatchCase (e1, pattern) ->
|
|
(match snd (Marked.unmark pattern) with
|
|
| None -> ()
|
|
| Some binding ->
|
|
Errors.format_spanned_warning (Marked.get_mark binding)
|
|
"This binding will be ignored (remove it to suppress warning)");
|
|
let enum_uid, c_uid =
|
|
disambiguate_constructor ctxt
|
|
(fst (Marked.unmark pattern))
|
|
(Marked.get_mark pattern)
|
|
in
|
|
let cases =
|
|
EnumConstructor.Map.mapi
|
|
(fun c_uid' tau ->
|
|
let nop_var = Var.make "_" in
|
|
Expr.make_abs [| nop_var |]
|
|
(Expr.elit (LBool (EnumConstructor.compare c_uid c_uid' = 0)) emark)
|
|
[tau] pos)
|
|
(EnumName.Map.find enum_uid ctxt.enums)
|
|
in
|
|
Expr.ematch
|
|
(translate_expr scope inside_definition_of ctxt e1)
|
|
enum_uid cases emark
|
|
| ArrayLit es -> Expr.earray (List.map rec_helper es) emark
|
|
| CollectionOp (((S.Filter { f } | S.Map { f }) as op), collection) ->
|
|
let collection = rec_helper collection in
|
|
let param, predicate = f in
|
|
let ctxt, param =
|
|
Name_resolution.add_def_local_var ctxt (Marked.unmark param)
|
|
in
|
|
let f_pred =
|
|
Expr.make_abs [| param |]
|
|
(translate_expr scope inside_definition_of ctxt predicate)
|
|
[TAny, pos]
|
|
pos
|
|
in
|
|
Expr.eapp
|
|
(Expr.eop
|
|
(match op with
|
|
| S.Map _ -> Map
|
|
| S.Filter _ -> Filter
|
|
| _ -> assert false)
|
|
[TAny, pos; TAny, pos]
|
|
emark)
|
|
[f_pred; collection] emark
|
|
| CollectionOp
|
|
(S.AggregateArgExtremum { max; default; f = param, predicate }, collection)
|
|
->
|
|
let default = rec_helper default in
|
|
let pos_dft = Expr.pos default in
|
|
let collection = rec_helper collection in
|
|
let ctxt, param =
|
|
Name_resolution.add_def_local_var ctxt (Marked.unmark param)
|
|
in
|
|
let cmp_op = if max then Op.Gt else Op.Lt in
|
|
let f_pred =
|
|
Expr.make_abs [| param |]
|
|
(translate_expr scope inside_definition_of ctxt predicate)
|
|
[TAny, pos]
|
|
pos
|
|
in
|
|
let param_name = Bindlib.name_of param in
|
|
let v1, v2 = Var.make (param_name ^ "_1"), Var.make (param_name ^ "_2") in
|
|
let x1 = Expr.make_var v1 emark in
|
|
let x2 = Expr.make_var v2 emark in
|
|
let reduce_f =
|
|
(* fun x1 x2 -> cmp_op (pred x1) (pred x2) *)
|
|
(* Note: this computes f_pred twice on every element, but we'd rather not
|
|
rely on returning tuples here *)
|
|
Expr.make_abs [| v1; v2 |]
|
|
(Expr.eifthenelse
|
|
(Expr.eapp
|
|
(Expr.eop cmp_op
|
|
[TAny, pos_dft; TAny, pos_dft]
|
|
(Untyped { pos = pos_dft }))
|
|
[Expr.eapp f_pred [x1] emark; Expr.eapp f_pred [x2] emark]
|
|
emark)
|
|
x1 x2 emark)
|
|
[TAny, pos; TAny, pos]
|
|
pos
|
|
in
|
|
Expr.eapp
|
|
(Expr.eop Reduce [TAny, pos; TAny, pos; TAny, pos] emark)
|
|
[reduce_f; default; collection]
|
|
emark
|
|
| CollectionOp
|
|
(((Exists { predicate } | Forall { predicate }) as op), collection) ->
|
|
let collection = rec_helper collection in
|
|
let init, op =
|
|
match op with
|
|
| Exists _ -> false, S.Or
|
|
| Forall _ -> true, S.And
|
|
| _ -> assert false
|
|
in
|
|
let init = Expr.elit (LBool init) emark in
|
|
let param0, predicate = predicate in
|
|
let ctxt, param =
|
|
Name_resolution.add_def_local_var ctxt (Marked.unmark param0)
|
|
in
|
|
let f =
|
|
let acc_var = Var.make "acc" in
|
|
let acc =
|
|
Expr.make_var acc_var (Untyped { pos = Marked.get_mark param0 })
|
|
in
|
|
Expr.eabs
|
|
(Expr.bind [| acc_var; param |]
|
|
(Expr.eapp (translate_binop op pos)
|
|
[acc; translate_expr scope inside_definition_of ctxt predicate]
|
|
emark))
|
|
[TAny, pos; TAny, pos]
|
|
emark
|
|
in
|
|
Expr.eapp
|
|
(Expr.eop Fold [TAny, pos; TAny, pos; TAny, pos] emark)
|
|
[f; init; collection] emark
|
|
| CollectionOp (AggregateExtremum { max; default }, collection) ->
|
|
let collection = rec_helper collection in
|
|
let default = translate_expr scope inside_definition_of ctxt default in
|
|
let op = translate_binop (if max then S.Gt KPoly else S.Lt KPoly) pos in
|
|
let op_f =
|
|
(* fun x1 x2 -> if op x1 x2 then x1 else x2 *)
|
|
let vname = if max then "max" else "min" in
|
|
let v1, v2 = Var.make (vname ^ "1"), Var.make (vname ^ "2") in
|
|
let x1 = Expr.make_var v1 emark in
|
|
let x2 = Expr.make_var v2 emark in
|
|
Expr.make_abs [| v1; v2 |]
|
|
(Expr.eifthenelse (Expr.eapp op [x1; x2] emark) x1 x2 emark)
|
|
[TAny, pos; TAny, pos]
|
|
pos
|
|
in
|
|
Expr.eapp
|
|
(Expr.eop Reduce [TAny, pos; TAny, pos; TAny, pos] emark)
|
|
[op_f; default; collection]
|
|
emark
|
|
| CollectionOp (AggregateSum { typ }, collection) ->
|
|
let collection = rec_helper collection in
|
|
let default_lit =
|
|
let i0 = Runtime.integer_of_int 0 in
|
|
match typ with
|
|
| S.Integer -> LInt i0
|
|
| S.Decimal -> LRat (Runtime.decimal_of_integer i0)
|
|
| S.Money -> LMoney (Runtime.money_of_cents_integer i0)
|
|
| S.Duration -> LDuration (Runtime.duration_of_numbers 0 0 0)
|
|
| t ->
|
|
Errors.raise_spanned_error pos
|
|
"It is impossible to sum values of type %a together"
|
|
SurfacePrint.format_primitive_typ t
|
|
in
|
|
let op_f =
|
|
(* fun x1 x2 -> op x1 x2 *)
|
|
(* we're not allowed pass the operator directly as argument, it must
|
|
appear inside an [EApp] *)
|
|
let v1, v2 = Var.make "sum1", Var.make "sum2" in
|
|
let x1 = Expr.make_var v1 emark in
|
|
let x2 = Expr.make_var v2 emark in
|
|
Expr.make_abs [| v1; v2 |]
|
|
(Expr.eapp (translate_binop (S.Add KPoly) pos) [x1; x2] emark)
|
|
[TAny, pos; TAny, pos]
|
|
pos
|
|
in
|
|
Expr.eapp
|
|
(Expr.eop Reduce [TAny, pos; TAny, pos; TAny, pos] emark)
|
|
[op_f; Expr.elit default_lit emark; collection]
|
|
emark
|
|
| MemCollection (member, collection) ->
|
|
let param_var = Var.make "collection_member" in
|
|
let param = Expr.make_var param_var emark in
|
|
let collection = rec_helper collection in
|
|
let init = Expr.elit (LBool false) emark in
|
|
let acc_var = Var.make "acc" in
|
|
let acc = Expr.make_var acc_var emark in
|
|
let f_body =
|
|
let member = translate_expr scope inside_definition_of ctxt member in
|
|
Expr.eapp
|
|
(Expr.eop Or [TLit TBool, pos; TLit TBool, pos] emark)
|
|
[
|
|
Expr.eapp
|
|
(Expr.eop Eq [TAny, pos; TAny, pos] emark)
|
|
[member; param] emark;
|
|
acc;
|
|
]
|
|
emark
|
|
in
|
|
let f =
|
|
Expr.eabs
|
|
(Expr.bind [| acc_var; param_var |] f_body)
|
|
[TLit TBool, pos; TAny, pos]
|
|
emark
|
|
in
|
|
Expr.eapp
|
|
(Expr.eop Fold [TAny, pos; TAny, pos; TAny, pos] emark)
|
|
[f; init; collection] emark
|
|
| Builtin ToDecimal -> Expr.eop ToRat [TAny, pos] emark
|
|
| Builtin ToMoney -> Expr.eop ToMoney [TAny, pos] emark
|
|
| Builtin Round -> Expr.eop Round [TAny, pos] emark
|
|
| Builtin Cardinal -> Expr.eop Length [TArray (TAny, pos), pos] emark
|
|
| Builtin GetDay -> Expr.eop GetDay [TLit TDate, pos] emark
|
|
| Builtin GetMonth -> Expr.eop GetMonth [TLit TDate, pos] emark
|
|
| Builtin GetYear -> Expr.eop GetYear [TLit TDate, pos] emark
|
|
| Builtin FirstDayOfMonth -> Expr.eop FirstDayOfMonth [TLit TDate, pos] emark
|
|
| Builtin LastDayOfMonth -> Expr.eop LastDayOfMonth [TLit TDate, pos] emark
|
|
|
|
and disambiguate_match_and_build_expression
|
|
(scope : ScopeName.t option)
|
|
(inside_definition_of : Ast.ScopeDef.t Marked.pos option)
|
|
(ctxt : Name_resolution.context)
|
|
(cases : Surface.Ast.match_case Marked.pos list) :
|
|
Ast.expr boxed EnumConstructor.Map.t * EnumName.t =
|
|
let create_var = function
|
|
| None -> ctxt, Var.make "_"
|
|
| Some param ->
|
|
let ctxt, param_var = Name_resolution.add_def_local_var ctxt param in
|
|
ctxt, param_var
|
|
in
|
|
let bind_case_body
|
|
(c_uid : EnumConstructor.t)
|
|
(e_uid : EnumName.t)
|
|
(ctxt : Name_resolution.context)
|
|
case_body
|
|
e_binder =
|
|
Expr.eabs e_binder
|
|
[
|
|
EnumConstructor.Map.find c_uid
|
|
(EnumName.Map.find e_uid ctxt.Name_resolution.enums);
|
|
]
|
|
(Marked.get_mark case_body)
|
|
in
|
|
let bind_match_cases (cases_d, e_uid, curr_index) (case, case_pos) =
|
|
match case with
|
|
| Surface.Ast.MatchCase case ->
|
|
let constructor, binding =
|
|
Marked.unmark case.Surface.Ast.match_case_pattern
|
|
in
|
|
let e_uid', c_uid =
|
|
disambiguate_constructor ctxt constructor
|
|
(Marked.get_mark case.Surface.Ast.match_case_pattern)
|
|
in
|
|
let e_uid =
|
|
match e_uid with
|
|
| None -> e_uid'
|
|
| Some e_uid ->
|
|
if e_uid = e_uid' then e_uid
|
|
else
|
|
Errors.raise_spanned_error
|
|
(Marked.get_mark case.Surface.Ast.match_case_pattern)
|
|
"This case matches a constructor of enumeration %a but previous \
|
|
case were matching constructors of enumeration %a"
|
|
EnumName.format_t e_uid EnumName.format_t e_uid'
|
|
in
|
|
(match EnumConstructor.Map.find_opt c_uid cases_d with
|
|
| None -> ()
|
|
| Some e_case ->
|
|
Errors.raise_multispanned_error
|
|
[None, Marked.get_mark case.match_case_expr; None, Expr.pos e_case]
|
|
"The constructor %a has been matched twice:" EnumConstructor.format_t
|
|
c_uid);
|
|
let ctxt, param_var = create_var (Option.map Marked.unmark binding) in
|
|
let case_body =
|
|
translate_expr scope inside_definition_of ctxt
|
|
case.Surface.Ast.match_case_expr
|
|
in
|
|
let e_binder = Expr.bind [| param_var |] case_body in
|
|
let case_expr = bind_case_body c_uid e_uid ctxt case_body e_binder in
|
|
( EnumConstructor.Map.add c_uid case_expr cases_d,
|
|
Some e_uid,
|
|
curr_index + 1 )
|
|
| Surface.Ast.WildCard match_case_expr -> (
|
|
let nb_cases = List.length cases in
|
|
let raise_wildcard_not_last_case_err () =
|
|
Errors.raise_multispanned_error
|
|
[
|
|
Some "Not ending wildcard:", case_pos;
|
|
( Some "Next reachable case:",
|
|
curr_index + 1 |> List.nth cases |> Marked.get_mark );
|
|
]
|
|
"Wildcard must be the last match case"
|
|
in
|
|
match e_uid with
|
|
| None ->
|
|
if 1 = nb_cases then
|
|
Errors.raise_spanned_error case_pos
|
|
"Couldn't infer the enumeration name from lonely wildcard \
|
|
(wildcard cannot be used as single match case)"
|
|
else raise_wildcard_not_last_case_err ()
|
|
| Some e_uid ->
|
|
if curr_index < nb_cases - 1 then raise_wildcard_not_last_case_err ();
|
|
let missing_constructors =
|
|
EnumName.Map.find e_uid ctxt.Name_resolution.enums
|
|
|> EnumConstructor.Map.filter_map (fun c_uid _ ->
|
|
match EnumConstructor.Map.find_opt c_uid cases_d with
|
|
| Some _ -> None
|
|
| None -> Some c_uid)
|
|
in
|
|
if EnumConstructor.Map.is_empty missing_constructors then
|
|
Errors.format_spanned_warning case_pos
|
|
"Unreachable match case, all constructors of the enumeration %a \
|
|
are already specified"
|
|
EnumName.format_t e_uid;
|
|
(* The current used strategy is to replace the wildcard branch:
|
|
match foo with
|
|
| Case1 x -> x
|
|
| _ -> 1
|
|
with:
|
|
let wildcard_payload = 1 in
|
|
match foo with
|
|
| Case1 x -> x
|
|
| Case2 -> wildcard_payload
|
|
...
|
|
| CaseN -> wildcard_payload *)
|
|
(* Creates the wildcard payload *)
|
|
let ctxt, payload_var = create_var None in
|
|
let case_body =
|
|
translate_expr scope inside_definition_of ctxt match_case_expr
|
|
in
|
|
let e_binder = Expr.bind [| payload_var |] case_body in
|
|
|
|
(* For each missing cases, binds the wildcard payload. *)
|
|
EnumConstructor.Map.fold
|
|
(fun c_uid _ (cases_d, e_uid_opt, curr_index) ->
|
|
let case_expr =
|
|
bind_case_body c_uid e_uid ctxt case_body e_binder
|
|
in
|
|
( EnumConstructor.Map.add c_uid case_expr cases_d,
|
|
e_uid_opt,
|
|
curr_index + 1 ))
|
|
missing_constructors
|
|
(cases_d, Some e_uid, curr_index))
|
|
in
|
|
let naked_expr, e_name, _ =
|
|
List.fold_left bind_match_cases (EnumConstructor.Map.empty, None, 0) cases
|
|
in
|
|
naked_expr, Option.get e_name
|
|
[@@ocamlformat "wrap-comments=false"]
|
|
|
|
(** {1 Translating scope definitions} *)
|
|
|
|
(** A scope use can be annotated with a pervasive precondition, in which case
|
|
this precondition has to be appended to the justifications of each
|
|
definition in the subscope use. This is what this function does. *)
|
|
let merge_conditions
|
|
(precond : Ast.expr boxed option)
|
|
(cond : Ast.expr boxed option)
|
|
(default_pos : Pos.t) : Ast.expr boxed =
|
|
match precond, cond with
|
|
| Some precond, Some cond ->
|
|
let op_term =
|
|
Expr.eop And
|
|
[TLit TBool, default_pos; TLit TBool, default_pos]
|
|
(Marked.get_mark cond)
|
|
in
|
|
Expr.eapp op_term [precond; cond] (Marked.get_mark cond)
|
|
| Some precond, None -> Marked.unmark precond, Untyped { pos = default_pos }
|
|
| None, Some cond -> cond
|
|
| None, None -> Expr.elit (LBool true) (Untyped { pos = default_pos })
|
|
|
|
(** Translates a surface definition into condition into a desugared {!type:
|
|
Ast.rule} *)
|
|
let process_default
|
|
(ctxt : Name_resolution.context)
|
|
(scope : ScopeName.t)
|
|
(def_key : Ast.ScopeDef.t Marked.pos)
|
|
(rule_id : RuleName.t)
|
|
(param_uid : Ast.expr Var.t Marked.pos option)
|
|
(precond : Ast.expr boxed option)
|
|
(exception_situation : Ast.exception_situation)
|
|
(label_situation : Ast.label_situation)
|
|
(just : Surface.Ast.expression option)
|
|
(cons : Surface.Ast.expression) : Ast.rule =
|
|
let just =
|
|
match just with
|
|
| Some just -> Some (translate_expr (Some scope) (Some def_key) ctxt just)
|
|
| None -> None
|
|
in
|
|
let just = merge_conditions precond just (Marked.get_mark def_key) in
|
|
let cons = translate_expr (Some scope) (Some def_key) ctxt cons in
|
|
{
|
|
rule_just = just;
|
|
rule_cons = cons;
|
|
rule_parameter =
|
|
(let def_key_typ =
|
|
Name_resolution.get_def_typ ctxt (Marked.unmark def_key)
|
|
in
|
|
match Marked.unmark def_key_typ, param_uid with
|
|
| TArrow (t_ins, _), Some param_uid ->
|
|
Some (List.map (fun t_in -> Marked.unmark param_uid, t_in) t_ins)
|
|
| TArrow _, None ->
|
|
Errors.raise_spanned_error (Expr.pos cons)
|
|
"This definition has a function type but the parameter is missing"
|
|
| _, Some _ ->
|
|
Errors.raise_spanned_error (Expr.pos cons)
|
|
"This definition has a parameter but its type is not a function"
|
|
| _ -> None);
|
|
rule_exception = exception_situation;
|
|
rule_id;
|
|
rule_label = label_situation;
|
|
}
|
|
|
|
(** Wrapper around {!val: process_default} that performs some name
|
|
disambiguation *)
|
|
let process_def
|
|
(precond : Ast.expr boxed option)
|
|
(scope_uid : ScopeName.t)
|
|
(ctxt : Name_resolution.context)
|
|
(prgm : Ast.program)
|
|
(def : Surface.Ast.definition) : Ast.program =
|
|
let scope : Ast.scope = ScopeName.Map.find scope_uid prgm.program_scopes in
|
|
let scope_ctxt = ScopeName.Map.find scope_uid ctxt.scopes in
|
|
let def_key =
|
|
Name_resolution.get_def_key
|
|
(Marked.unmark def.definition_name)
|
|
def.definition_state scope_uid ctxt
|
|
(Marked.get_mark def.definition_name)
|
|
in
|
|
let scope_def_ctxt =
|
|
Ast.ScopeDefMap.find def_key scope_ctxt.scope_defs_contexts
|
|
in
|
|
(* We add to the name resolution context the name of the parameter variable *)
|
|
let param_uid, new_ctxt =
|
|
match def.definition_parameter with
|
|
| None -> None, ctxt
|
|
| Some param ->
|
|
let ctxt, param_var =
|
|
Name_resolution.add_def_local_var ctxt (Marked.unmark param)
|
|
in
|
|
Some (Marked.same_mark_as param_var param), ctxt
|
|
in
|
|
let scope_updated =
|
|
let scope_def = Ast.ScopeDefMap.find def_key scope.scope_defs in
|
|
let rule_name = def.definition_id in
|
|
let label_situation =
|
|
match def.definition_label with
|
|
| Some (label_str, label_pos) ->
|
|
Ast.ExplicitlyLabeled
|
|
(IdentName.Map.find label_str scope_def_ctxt.label_idmap, label_pos)
|
|
| None -> Ast.Unlabeled
|
|
in
|
|
let exception_situation =
|
|
match def.Surface.Ast.definition_exception_to with
|
|
| NotAnException -> Ast.BaseCase
|
|
| UnlabeledException -> (
|
|
match scope_def_ctxt.default_exception_rulename with
|
|
| None | Some (Name_resolution.Ambiguous _) ->
|
|
(* This should have been caught previously by
|
|
check_unlabeled_exception *)
|
|
assert false (* should not happen *)
|
|
| Some (Name_resolution.Unique (name, pos)) ->
|
|
ExceptionToRule (name, pos))
|
|
| ExceptionToLabel label_str -> (
|
|
try
|
|
let label_id =
|
|
IdentName.Map.find (Marked.unmark label_str)
|
|
scope_def_ctxt.label_idmap
|
|
in
|
|
ExceptionToLabel (label_id, Marked.get_mark label_str)
|
|
with Not_found ->
|
|
Errors.raise_spanned_error
|
|
(Marked.get_mark label_str)
|
|
"Unknown label for the scope variable %a: \"%s\""
|
|
Ast.ScopeDef.format_t def_key (Marked.unmark label_str))
|
|
in
|
|
let scope_def =
|
|
{
|
|
scope_def with
|
|
scope_def_rules =
|
|
RuleName.Map.add rule_name
|
|
(process_default new_ctxt scope_uid
|
|
(def_key, Marked.get_mark def.definition_name)
|
|
rule_name param_uid precond exception_situation label_situation
|
|
def.definition_condition def.definition_expr)
|
|
scope_def.scope_def_rules;
|
|
}
|
|
in
|
|
{
|
|
scope with
|
|
scope_defs = Ast.ScopeDefMap.add def_key scope_def scope.scope_defs;
|
|
}
|
|
in
|
|
{
|
|
prgm with
|
|
program_scopes =
|
|
ScopeName.Map.add scope_uid scope_updated prgm.program_scopes;
|
|
}
|
|
|
|
(** Translates a {!type: Surface.Ast.rule} from the surface language *)
|
|
let process_rule
|
|
(precond : Ast.expr boxed option)
|
|
(scope : ScopeName.t)
|
|
(ctxt : Name_resolution.context)
|
|
(prgm : Ast.program)
|
|
(rule : Surface.Ast.rule) : Ast.program =
|
|
let def = Surface.Ast.rule_to_def rule in
|
|
process_def precond scope ctxt prgm def
|
|
|
|
(** Translates assertions *)
|
|
let process_assert
|
|
(precond : Ast.expr boxed option)
|
|
(scope_uid : ScopeName.t)
|
|
(ctxt : Name_resolution.context)
|
|
(prgm : Ast.program)
|
|
(ass : Surface.Ast.assertion) : Ast.program =
|
|
let scope : Ast.scope = ScopeName.Map.find scope_uid prgm.program_scopes in
|
|
let ass =
|
|
translate_expr (Some scope_uid) None ctxt
|
|
(match ass.Surface.Ast.assertion_condition with
|
|
| None -> ass.Surface.Ast.assertion_content
|
|
| Some cond ->
|
|
( Surface.Ast.IfThenElse
|
|
( cond,
|
|
ass.Surface.Ast.assertion_content,
|
|
Marked.same_mark_as (Surface.Ast.Literal (Surface.Ast.LBool true))
|
|
cond ),
|
|
Marked.get_mark cond ))
|
|
in
|
|
let ass =
|
|
match precond with
|
|
| Some precond ->
|
|
Expr.eifthenelse precond ass
|
|
(Expr.elit (LBool true) (Marked.get_mark precond))
|
|
(Marked.get_mark precond)
|
|
| None -> ass
|
|
in
|
|
let new_scope =
|
|
{ scope with scope_assertions = ass :: scope.scope_assertions }
|
|
in
|
|
{
|
|
prgm with
|
|
program_scopes = ScopeName.Map.add scope_uid new_scope prgm.program_scopes;
|
|
}
|
|
|
|
(** Translates a surface definition, rule or assertion *)
|
|
let process_scope_use_item
|
|
(precond : Surface.Ast.expression option)
|
|
(scope : ScopeName.t)
|
|
(ctxt : Name_resolution.context)
|
|
(prgm : Ast.program)
|
|
(item : Surface.Ast.scope_use_item Marked.pos) : Ast.program =
|
|
let precond = Option.map (translate_expr (Some scope) None ctxt) precond in
|
|
match Marked.unmark item with
|
|
| Surface.Ast.Rule rule -> process_rule precond scope ctxt prgm rule
|
|
| Surface.Ast.Definition def -> process_def precond scope ctxt prgm def
|
|
| Surface.Ast.Assertion ass -> process_assert precond scope ctxt prgm ass
|
|
| _ -> prgm
|
|
|
|
(** {1 Translating top-level items} *)
|
|
|
|
(* If this is an unlabeled exception, ensures that it has a unique default
|
|
definition *)
|
|
let check_unlabeled_exception
|
|
(scope : ScopeName.t)
|
|
(ctxt : Name_resolution.context)
|
|
(item : Surface.Ast.scope_use_item Marked.pos) : unit =
|
|
let scope_ctxt = ScopeName.Map.find scope ctxt.scopes in
|
|
match Marked.unmark item with
|
|
| Surface.Ast.Rule _ | Surface.Ast.Definition _ -> (
|
|
let def_key, exception_to =
|
|
match Marked.unmark item with
|
|
| Surface.Ast.Rule rule ->
|
|
( Name_resolution.get_def_key
|
|
(Marked.unmark rule.rule_name)
|
|
rule.rule_state scope ctxt
|
|
(Marked.get_mark rule.rule_name),
|
|
rule.rule_exception_to )
|
|
| Surface.Ast.Definition def ->
|
|
( Name_resolution.get_def_key
|
|
(Marked.unmark def.definition_name)
|
|
def.definition_state scope ctxt
|
|
(Marked.get_mark def.definition_name),
|
|
def.definition_exception_to )
|
|
| _ -> assert false
|
|
(* should not happen *)
|
|
in
|
|
let scope_def_ctxt =
|
|
Ast.ScopeDefMap.find def_key scope_ctxt.scope_defs_contexts
|
|
in
|
|
match exception_to with
|
|
| Surface.Ast.NotAnException | Surface.Ast.ExceptionToLabel _ -> ()
|
|
(* If this is an unlabeled exception, we check that it has a unique default
|
|
definition *)
|
|
| Surface.Ast.UnlabeledException -> (
|
|
match scope_def_ctxt.default_exception_rulename with
|
|
| None ->
|
|
Errors.raise_spanned_error (Marked.get_mark item)
|
|
"This exception does not have a corresponding definition"
|
|
| Some (Ambiguous pos) ->
|
|
Errors.raise_multispanned_error
|
|
([Some "Ambiguous exception", Marked.get_mark item]
|
|
@ List.map (fun p -> Some "Candidate definition", p) pos)
|
|
"This exception can refer to several definitions. Try using labels \
|
|
to disambiguate"
|
|
| Some (Unique _) -> ()))
|
|
| _ -> ()
|
|
|
|
(** Translates a surface scope use, which is a bunch of definitions *)
|
|
let process_scope_use
|
|
(ctxt : Name_resolution.context)
|
|
(prgm : Ast.program)
|
|
(use : Surface.Ast.scope_use) : Ast.program =
|
|
let scope_uid = Name_resolution.get_scope ctxt use.scope_use_name in
|
|
(* Make sure the scope exists *)
|
|
let prgm =
|
|
match ScopeName.Map.find_opt scope_uid prgm.program_scopes with
|
|
| Some _ -> prgm
|
|
| None -> assert false
|
|
(* should not happen *)
|
|
in
|
|
let precond = use.scope_use_condition in
|
|
List.iter (check_unlabeled_exception scope_uid ctxt) use.scope_use_items;
|
|
List.fold_left
|
|
(process_scope_use_item precond scope_uid ctxt)
|
|
prgm use.scope_use_items
|
|
|
|
let process_topdef
|
|
(ctxt : Name_resolution.context)
|
|
(prgm : Ast.program)
|
|
(def : S.top_def) : Ast.program =
|
|
let id =
|
|
IdentName.Map.find
|
|
(Marked.unmark def.S.topdef_name)
|
|
ctxt.Name_resolution.topdefs
|
|
in
|
|
let ty_pos = Marked.get_mark def.S.topdef_type in
|
|
let translate_typ t =
|
|
(* Todo: better helper function from a more appropriate place *)
|
|
Name_resolution.process_base_typ ctxt
|
|
(S.Data (Marked.unmark t), Marked.get_mark t)
|
|
in
|
|
let body_type = translate_typ def.S.topdef_type in
|
|
let arg_types =
|
|
List.map (fun (_, ty) -> translate_typ ty) def.S.topdef_args
|
|
in
|
|
let expr =
|
|
let ctxt, rv_args =
|
|
List.fold_left
|
|
(fun (ctxt, rv_args) (v, _ty) ->
|
|
let ctxt, a =
|
|
Name_resolution.add_def_local_var ctxt (Marked.unmark v)
|
|
in
|
|
ctxt, a :: rv_args)
|
|
(ctxt, []) def.S.topdef_args
|
|
in
|
|
let body = translate_expr None None ctxt def.S.topdef_expr in
|
|
match rv_args with
|
|
| [] -> body
|
|
| rv_args ->
|
|
Expr.make_abs
|
|
(Array.of_list (List.rev rv_args))
|
|
body arg_types
|
|
(Marked.get_mark def.S.topdef_name)
|
|
in
|
|
let typ =
|
|
match arg_types with
|
|
| [] -> body_type
|
|
| _ -> TArrow (arg_types, body_type), ty_pos
|
|
in
|
|
{
|
|
prgm with
|
|
Ast.program_topdefs =
|
|
TopdefName.Map.add id (Expr.unbox expr, typ) prgm.Ast.program_topdefs;
|
|
}
|
|
|
|
let attribute_to_io (attr : Surface.Ast.scope_decl_context_io) : Ast.io =
|
|
{
|
|
Ast.io_output = attr.scope_decl_context_io_output;
|
|
Ast.io_input =
|
|
Marked.map_under_mark
|
|
(fun io ->
|
|
match io with
|
|
| Surface.Ast.Input -> Ast.OnlyInput
|
|
| Surface.Ast.Internal -> Ast.NoInput
|
|
| Surface.Ast.Context -> Ast.Reentrant)
|
|
attr.scope_decl_context_io_input;
|
|
}
|
|
|
|
let init_scope_defs
|
|
(ctxt : Name_resolution.context)
|
|
(scope_idmap : Name_resolution.scope_var_or_subscope IdentName.Map.t) :
|
|
Ast.scope_def Ast.ScopeDefMap.t =
|
|
(* Initializing the definitions of all scopes and subscope vars, with no rules
|
|
yet inside *)
|
|
let add_def _ v scope_def_map =
|
|
match v with
|
|
| Name_resolution.ScopeVar v -> (
|
|
let v_sig = ScopeVar.Map.find v ctxt.Name_resolution.var_typs in
|
|
match v_sig.var_sig_states_list with
|
|
| [] ->
|
|
let def_key = Ast.ScopeDef.Var (v, None) in
|
|
Ast.ScopeDefMap.add def_key
|
|
{
|
|
Ast.scope_def_rules = RuleName.Map.empty;
|
|
Ast.scope_def_typ = v_sig.var_sig_typ;
|
|
Ast.scope_def_is_condition = v_sig.var_sig_is_condition;
|
|
Ast.scope_def_io = attribute_to_io v_sig.var_sig_io;
|
|
}
|
|
scope_def_map
|
|
| states ->
|
|
let scope_def, _ =
|
|
List.fold_left
|
|
(fun (acc, i) state ->
|
|
let def_key = Ast.ScopeDef.Var (v, Some state) in
|
|
let def =
|
|
{
|
|
Ast.scope_def_rules = RuleName.Map.empty;
|
|
Ast.scope_def_typ = v_sig.var_sig_typ;
|
|
Ast.scope_def_is_condition = v_sig.var_sig_is_condition;
|
|
Ast.scope_def_io =
|
|
(* The first state should have the input I/O of the original
|
|
variable, and the last state should have the output I/O
|
|
of the original variable. All intermediate states shall
|
|
have "internal" I/O.*)
|
|
(let original_io = attribute_to_io v_sig.var_sig_io in
|
|
let io_input =
|
|
if i = 0 then original_io.io_input
|
|
else
|
|
Ast.NoInput, Marked.get_mark (StateName.get_info state)
|
|
in
|
|
let io_output =
|
|
if i = List.length states - 1 then original_io.io_output
|
|
else false, Marked.get_mark (StateName.get_info state)
|
|
in
|
|
{ io_input; io_output });
|
|
}
|
|
in
|
|
Ast.ScopeDefMap.add def_key def acc, i + 1)
|
|
(scope_def_map, 0) states
|
|
in
|
|
scope_def)
|
|
| Name_resolution.SubScope (v0, subscope_uid) ->
|
|
let sub_scope_def =
|
|
ScopeName.Map.find subscope_uid ctxt.Name_resolution.scopes
|
|
in
|
|
IdentName.Map.fold
|
|
(fun _ v scope_def_map ->
|
|
match v with
|
|
| Name_resolution.SubScope _ -> scope_def_map
|
|
| Name_resolution.ScopeVar v ->
|
|
(* TODO: shouldn't we ignore internal variables too at this point
|
|
? *)
|
|
let v_sig = ScopeVar.Map.find v ctxt.Name_resolution.var_typs in
|
|
let def_key =
|
|
Ast.ScopeDef.SubScopeVar
|
|
(v0, v, Marked.get_mark (ScopeVar.get_info v))
|
|
in
|
|
Ast.ScopeDefMap.add def_key
|
|
{
|
|
Ast.scope_def_rules = RuleName.Map.empty;
|
|
Ast.scope_def_typ = v_sig.var_sig_typ;
|
|
Ast.scope_def_is_condition = v_sig.var_sig_is_condition;
|
|
Ast.scope_def_io = attribute_to_io v_sig.var_sig_io;
|
|
}
|
|
scope_def_map)
|
|
sub_scope_def.Name_resolution.var_idmap scope_def_map
|
|
in
|
|
IdentName.Map.fold add_def scope_idmap Ast.ScopeDefMap.empty
|
|
|
|
(** Main function of this module *)
|
|
let translate_program
|
|
(ctxt : Name_resolution.context)
|
|
(prgm : Surface.Ast.program) : Ast.program =
|
|
let empty_prgm =
|
|
let program_scopes =
|
|
ScopeName.Map.mapi
|
|
(fun s_uid s_context ->
|
|
let scope_vars =
|
|
IdentName.Map.fold
|
|
(fun _ v acc ->
|
|
match v with
|
|
| Name_resolution.SubScope _ -> acc
|
|
| Name_resolution.ScopeVar v -> (
|
|
let v_sig = ScopeVar.Map.find v ctxt.var_typs in
|
|
match v_sig.var_sig_states_list with
|
|
| [] -> ScopeVar.Map.add v Ast.WholeVar acc
|
|
| states -> ScopeVar.Map.add v (Ast.States states) acc))
|
|
s_context.Name_resolution.var_idmap ScopeVar.Map.empty
|
|
in
|
|
let scope_sub_scopes =
|
|
IdentName.Map.fold
|
|
(fun _ v acc ->
|
|
match v with
|
|
| Name_resolution.ScopeVar _ -> acc
|
|
| Name_resolution.SubScope (sub_var, sub_scope) ->
|
|
SubScopeName.Map.add sub_var sub_scope acc)
|
|
s_context.Name_resolution.var_idmap SubScopeName.Map.empty
|
|
in
|
|
{
|
|
Ast.scope_vars;
|
|
scope_sub_scopes;
|
|
scope_defs = init_scope_defs ctxt s_context.var_idmap;
|
|
scope_assertions = [];
|
|
scope_meta_assertions = [];
|
|
scope_uid = s_uid;
|
|
})
|
|
ctxt.Name_resolution.scopes
|
|
in
|
|
{
|
|
Ast.program_ctx =
|
|
{
|
|
ctx_structs = ctxt.Name_resolution.structs;
|
|
ctx_enums = ctxt.Name_resolution.enums;
|
|
ctx_scopes =
|
|
IdentName.Map.fold
|
|
(fun _ def acc ->
|
|
match def with
|
|
| Name_resolution.TScope (scope, scope_out_struct) ->
|
|
ScopeName.Map.add scope scope_out_struct acc
|
|
| _ -> acc)
|
|
ctxt.Name_resolution.typedefs ScopeName.Map.empty;
|
|
ctx_struct_fields = ctxt.Name_resolution.field_idmap;
|
|
};
|
|
Ast.program_topdefs = TopdefName.Map.empty;
|
|
Ast.program_scopes;
|
|
}
|
|
in
|
|
let rec processer_structure
|
|
(prgm : Ast.program)
|
|
(item : Surface.Ast.law_structure) : Ast.program =
|
|
match item with
|
|
| LawHeading (_, children) ->
|
|
List.fold_left
|
|
(fun prgm child -> processer_structure prgm child)
|
|
prgm children
|
|
| CodeBlock (block, _, _) ->
|
|
List.fold_left
|
|
(fun prgm item ->
|
|
match Marked.unmark item with
|
|
| Surface.Ast.ScopeUse use -> process_scope_use ctxt prgm use
|
|
| Surface.Ast.Topdef def -> process_topdef ctxt prgm def
|
|
| Surface.Ast.ScopeDecl _ | Surface.Ast.StructDecl _
|
|
| Surface.Ast.EnumDecl _ ->
|
|
prgm)
|
|
prgm block
|
|
| LawInclude _ | LawText _ -> prgm
|
|
in
|
|
List.fold_left processer_structure empty_prgm prgm.program_items
|