(** Functions to load CFIM ASTs from json. Initially, we used `ppx_derive_yojson` to automate this. However, `ppx_derive_yojson` expects formatting to be slightly different from what `serde_rs` generates (because it uses [Yojson.Safe.t] and not [Yojson.Basic.t]). TODO: we should check all that the integer values are in the proper range *) open Yojson.Basic open Identifiers open OfJsonBasic module T = Types module V = Values module S = Scalars module M = Modules module E = Expressions module A = CfimAst (* The default logger *) let log = Logging.cfim_of_json_logger let name_of_json (js : json) : (name, string) result = combine_error_msgs js "name_of_json" (list_of_json string_of_json js) let fun_name_of_json (js : json) : (fun_name, string) result = combine_error_msgs js "fun_name_of_json" (match js with | `Assoc [ ("Regular", name) ] -> let* name = name_of_json name in Ok (Regular name) | `Assoc [ ("Impl", `List [ type_name; impl_id; ident ]) ] -> let* type_name = name_of_json type_name in let* impl_id = ImplId.id_of_json impl_id in let* ident = string_of_json ident in Ok (Impl (type_name, impl_id, ident)) | _ -> Error "") let type_var_of_json (js : json) : (T.type_var, string) result = combine_error_msgs js "type_var_of_json" (match js with | `Assoc [ ("index", index); ("name", name) ] -> let* index = T.TypeVarId.id_of_json index in let* name = string_of_json name in Ok { T.index; name } | _ -> Error "") let region_var_of_json (js : json) : (T.region_var, string) result = combine_error_msgs js "region_var_of_json" (match js with | `Assoc [ ("index", index); ("name", name) ] -> let* index = T.RegionVarId.id_of_json index in let* name = string_option_of_json name in Ok { T.index; name } | _ -> Error "") let region_of_json (js : json) : (T.RegionVarId.id T.region, string) result = combine_error_msgs js "region_of_json" (match js with | `String "Static" -> Ok T.Static | `Assoc [ ("Var", rid) ] -> let* rid = T.RegionVarId.id_of_json rid in Ok (T.Var rid) | _ -> Error "") let erased_region_of_json (js : json) : (T.erased_region, string) result = combine_error_msgs js "erased_region_of_json" (match js with `String "Erased" -> Ok T.Erased | _ -> Error "") let integer_type_of_json (js : json) : (T.integer_type, string) result = match js with | `String "Isize" -> Ok T.Isize | `String "I8" -> Ok T.I8 | `String "I16" -> Ok T.I16 | `String "I32" -> Ok T.I32 | `String "I64" -> Ok T.I64 | `String "I128" -> Ok T.I128 | `String "Usize" -> Ok T.Usize | `String "U8" -> Ok T.U8 | `String "U16" -> Ok T.U16 | `String "U32" -> Ok T.U32 | `String "U64" -> Ok T.U64 | `String "U128" -> Ok T.U128 | _ -> Error ("integer_type_of_json failed on: " ^ show js) let ref_kind_of_json (js : json) : (T.ref_kind, string) result = match js with | `String "Mut" -> Ok T.Mut | `String "Shared" -> Ok T.Shared | _ -> Error ("ref_kind_of_json failed on: " ^ show js) let assumed_ty_of_json (js : json) : (T.assumed_ty, string) result = combine_error_msgs js "assumed_ty_of_json" (match js with | `String "Box" -> Ok T.Box | `String "Vec" -> Ok T.Vec | `String "Option" -> Ok T.Option | _ -> Error "") let type_id_of_json (js : json) : (T.type_id, string) result = combine_error_msgs js "type_id_of_json" (match js with | `Assoc [ ("Adt", id) ] -> let* id = T.TypeDeclId.id_of_json id in Ok (T.AdtId id) | `String "Tuple" -> Ok T.Tuple | `Assoc [ ("Assumed", aty) ] -> let* aty = assumed_ty_of_json aty in Ok (T.Assumed aty) | _ -> Error "") let rec ty_of_json (r_of_json : json -> ('r, string) result) (js : json) : ('r T.ty, string) result = combine_error_msgs js "ty_of_json" (match js with | `Assoc [ ("Adt", `List [ id; regions; types ]) ] -> let* id = type_id_of_json id in let* regions = list_of_json r_of_json regions in let* types = list_of_json (ty_of_json r_of_json) types in (* Sanity check *) (match id with T.Tuple -> assert (List.length regions = 0) | _ -> ()); Ok (T.Adt (id, regions, types)) | `Assoc [ ("TypeVar", `List [ id ]) ] -> let* id = T.TypeVarId.id_of_json id in Ok (T.TypeVar id) | `String "Bool" -> Ok Bool | `String "Char" -> Ok Char | `String "`Never" -> Ok Never | `Assoc [ ("Integer", `List [ int_ty ]) ] -> let* int_ty = integer_type_of_json int_ty in Ok (T.Integer int_ty) | `String "Str" -> Ok Str | `Assoc [ ("Array", `List [ ty ]) ] -> let* ty = ty_of_json r_of_json ty in Ok (T.Array ty) | `Assoc [ ("Slice", `List [ ty ]) ] -> let* ty = ty_of_json r_of_json ty in Ok (T.Slice ty) | `Assoc [ ("Ref", `List [ region; ty; ref_kind ]) ] -> let* region = r_of_json region in let* ty = ty_of_json r_of_json ty in let* ref_kind = ref_kind_of_json ref_kind in Ok (T.Ref (region, ty, ref_kind)) | _ -> Error "") let sty_of_json (js : json) : (T.sty, string) result = combine_error_msgs js "sty_of_json" (ty_of_json region_of_json js) let ety_of_json (js : json) : (T.ety, string) result = combine_error_msgs js "ety_of_json" (ty_of_json erased_region_of_json js) let field_of_json (js : json) : (T.field, string) result = combine_error_msgs js "field_of_json" (match js with | `Assoc [ ("name", name); ("ty", ty) ] -> let* name = option_of_json string_of_json name in let* ty = sty_of_json ty in Ok { T.field_name = name; field_ty = ty } | _ -> Error "") let variant_of_json (js : json) : (T.variant, string) result = combine_error_msgs js "variant_of_json" (match js with | `Assoc [ ("name", name); ("fields", fields) ] -> let* name = string_of_json name in let* fields = list_of_json field_of_json fields in Ok { T.variant_name = name; fields } | _ -> Error "") let type_decl_kind_of_json (js : json) : (T.type_decl_kind, string) result = combine_error_msgs js "type_decl_kind_of_json" (match js with | `Assoc [ ("Struct", fields) ] -> let* fields = list_of_json field_of_json fields in Ok (T.Struct fields) | `Assoc [ ("Enum", variants) ] -> let* variants = list_of_json variant_of_json variants in Ok (T.Enum variants) | _ -> Error "") let region_var_group_of_json (js : json) : (T.region_var_group, string) result = combine_error_msgs js "region_var_group_of_json" (match js with | `Assoc [ ("id", id); ("regions", regions); ("parents", parents) ] -> let* id = T.RegionGroupId.id_of_json id in let* regions = list_of_json T.RegionVarId.id_of_json regions in let* parents = list_of_json T.RegionGroupId.id_of_json parents in Ok { T.id; regions; parents } | _ -> Error "") let region_var_groups_of_json (js : json) : (T.region_var_groups, string) result = combine_error_msgs js "region_var_group_of_json" (list_of_json region_var_group_of_json js) let type_decl_of_json (js : json) : (T.type_decl, string) result = combine_error_msgs js "type_decl_of_json" (match js with | `Assoc [ ("def_id", def_id); ("name", name); ("region_params", region_params); ("type_params", type_params); ("regions_hierarchy", regions_hierarchy); ("kind", kind); ] -> let* def_id = T.TypeDeclId.id_of_json def_id in let* name = name_of_json name in let* region_params = list_of_json region_var_of_json region_params in let* type_params = list_of_json type_var_of_json type_params in let* kind = type_decl_kind_of_json kind in let* regions_hierarchy = region_var_groups_of_json regions_hierarchy in Ok { T.def_id; name; region_params; type_params; kind; regions_hierarchy; } | _ -> Error "") let var_of_json (js : json) : (A.var, string) result = combine_error_msgs js "var_of_json" (match js with | `Assoc [ ("index", index); ("name", name); ("ty", ty) ] -> let* index = V.VarId.id_of_json index in let* name = string_option_of_json name in let* var_ty = ety_of_json ty in Ok { A.index; name; var_ty } | _ -> Error "") let big_int_of_json (js : json) : (V.big_int, string) result = combine_error_msgs js "big_int_of_json" (match js with | `Int i -> Ok (Z.of_int i) | `String is -> Ok (Z.of_string is) | _ -> Error "") (** Deserialize a [scalar_value] from JSON and **check the ranges**. Note that in practice we also check that the values are in range in the interpreter functions. Still, it doesn't cost much to be a bit conservative. *) let scalar_value_of_json (js : json) : (V.scalar_value, string) result = let res = combine_error_msgs js "scalar_value_of_json" (match js with | `Assoc [ ("Isize", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = Isize } | `Assoc [ ("I8", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = I8 } | `Assoc [ ("I16", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = I16 } | `Assoc [ ("I32", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = I32 } | `Assoc [ ("I64", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = I64 } | `Assoc [ ("I128", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = I128 } | `Assoc [ ("Usize", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = Usize } | `Assoc [ ("U8", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = U8 } | `Assoc [ ("U16", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = U16 } | `Assoc [ ("U32", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = U32 } | `Assoc [ ("U64", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = U64 } | `Assoc [ ("U128", `List [ bi ]) ] -> let* bi = big_int_of_json bi in Ok { V.value = bi; int_ty = U128 } | _ -> Error "") in match res with | Error _ -> res | Ok sv -> if not (S.check_scalar_value_in_range sv) then ( log#serror ("Scalar value not in range: " ^ V.show_scalar_value sv); raise (Failure ("Scalar value not in range: " ^ V.show_scalar_value sv))); res let constant_value_of_json (js : json) : (V.constant_value, string) result = combine_error_msgs js "constant_value_of_json" (match js with | `Assoc [ ("Scalar", scalar_value) ] -> let* scalar_value = scalar_value_of_json scalar_value in Ok (V.Scalar scalar_value) | `Assoc [ ("Bool", v) ] -> let* v = bool_of_json v in Ok (V.Bool v) | `Assoc [ ("Char", v) ] -> let* v = char_of_json v in Ok (V.Char v) | `Assoc [ ("String", v) ] -> let* v = string_of_json v in Ok (V.String v) | _ -> Error "") let field_proj_kind_of_json (js : json) : (E.field_proj_kind, string) result = combine_error_msgs js "field_proj_kind_of_json" (match js with | `Assoc [ ("ProjAdt", `List [ def_id; opt_variant_id ]) ] -> let* def_id = T.TypeDeclId.id_of_json def_id in let* opt_variant_id = option_of_json T.VariantId.id_of_json opt_variant_id in Ok (E.ProjAdt (def_id, opt_variant_id)) | `Assoc [ ("ProjTuple", i) ] -> let* i = int_of_json i in Ok (E.ProjTuple i) | `Assoc [ ("ProjOption", variant_id) ] -> let* variant_id = T.VariantId.id_of_json variant_id in Ok (E.ProjOption variant_id) | _ -> Error "") let projection_elem_of_json (js : json) : (E.projection_elem, string) result = combine_error_msgs js "projection_elem_of_json" (match js with | `String "Deref" -> Ok E.Deref | `String "DerefBox" -> Ok E.DerefBox | `Assoc [ ("Field", `List [ proj_kind; field_id ]) ] -> let* proj_kind = field_proj_kind_of_json proj_kind in let* field_id = T.FieldId.id_of_json field_id in Ok (E.Field (proj_kind, field_id)) | _ -> Error ("projection_elem_of_json failed on:" ^ show js)) let projection_of_json (js : json) : (E.projection, string) result = combine_error_msgs js "projection_of_json" (list_of_json projection_elem_of_json js) let place_of_json (js : json) : (E.place, string) result = combine_error_msgs js "place_of_json" (match js with | `Assoc [ ("var_id", var_id); ("projection", projection) ] -> let* var_id = V.VarId.id_of_json var_id in let* projection = projection_of_json projection in Ok { E.var_id; projection } | _ -> Error "") let borrow_kind_of_json (js : json) : (E.borrow_kind, string) result = match js with | `String "Shared" -> Ok E.Shared | `String "Mut" -> Ok E.Mut | `String "TwoPhaseMut" -> Ok E.TwoPhaseMut | _ -> Error ("borrow_kind_of_json failed on:" ^ show js) let unop_of_json (js : json) : (E.unop, string) result = match js with | `String "Not" -> Ok E.Not | `String "Neg" -> Ok E.Neg | _ -> Error ("unop_of_json failed on:" ^ show js) let binop_of_json (js : json) : (E.binop, string) result = match js with | `String "BitXor" -> Ok E.BitXor | `String "BitAnd" -> Ok E.BitAnd | `String "BitOr" -> Ok E.BitOr | `String "Eq" -> Ok E.Eq | `String "Lt" -> Ok E.Lt | `String "Le" -> Ok E.Le | `String "Ne" -> Ok E.Ne | `String "Ge" -> Ok E.Ge | `String "Gt" -> Ok E.Gt | `String "Div" -> Ok E.Div | `String "Rem" -> Ok E.Rem | `String "Add" -> Ok E.Add | `String "Sub" -> Ok E.Sub | `String "Mul" -> Ok E.Mul | `String "Shl" -> Ok E.Shl | `String "Shr" -> Ok E.Shr | _ -> Error ("binop_of_json failed on:" ^ show js) let rec operand_constant_value_of_json (js : json) : (E.operand_constant_value, string) result = combine_error_msgs js "operand_constant_value_of_json" (match js with | `Assoc [ ("ConstantValue", `List [ cv ]) ] -> let* cv = constant_value_of_json cv in Ok (E.ConstantValue cv) | `Assoc [ ("ConstantAdt", `List [ variant_id; field_values ]) ] -> let* variant_id = option_of_json T.VariantId.id_of_json variant_id in let* field_values = list_of_json operand_constant_value_of_json field_values in Ok (E.ConstantAdt (variant_id, field_values)) | _ -> Error "") let operand_of_json (js : json) : (E.operand, string) result = combine_error_msgs js "operand_of_json" (match js with | `Assoc [ ("Copy", place) ] -> let* place = place_of_json place in Ok (E.Copy place) | `Assoc [ ("Move", place) ] -> let* place = place_of_json place in Ok (E.Move place) | `Assoc [ ("Constant", `List [ ty; cv ]) ] -> let* ty = ety_of_json ty in let* cv = operand_constant_value_of_json cv in Ok (E.Constant (ty, cv)) | _ -> Error "") let aggregate_kind_of_json (js : json) : (E.aggregate_kind, string) result = combine_error_msgs js "operand_kind_of_json" (match js with | `String "AggregatedTuple" -> Ok E.AggregatedTuple | `Assoc [ ("AggregatedAdt", `List [ id; opt_variant_id; regions; tys ]) ] -> let* id = T.TypeDeclId.id_of_json id in let* opt_variant_id = option_of_json T.VariantId.id_of_json opt_variant_id in let* regions = list_of_json erased_region_of_json regions in let* tys = list_of_json ety_of_json tys in Ok (E.AggregatedAdt (id, opt_variant_id, regions, tys)) | _ -> Error "") let rvalue_of_json (js : json) : (E.rvalue, string) result = combine_error_msgs js "rvalue_of_json" (match js with | `Assoc [ ("Use", op) ] -> let* op = operand_of_json op in Ok (E.Use op) | `Assoc [ ("Ref", `List [ place; borrow_kind ]) ] -> let* place = place_of_json place in let* borrow_kind = borrow_kind_of_json borrow_kind in Ok (E.Ref (place, borrow_kind)) | `Assoc [ ("UnaryOp", `List [ unop; op ]) ] -> let* unop = unop_of_json unop in let* op = operand_of_json op in Ok (E.UnaryOp (unop, op)) | `Assoc [ ("BinaryOp", `List [ binop; op1; op2 ]) ] -> let* binop = binop_of_json binop in let* op1 = operand_of_json op1 in let* op2 = operand_of_json op2 in Ok (E.BinaryOp (binop, op1, op2)) | `Assoc [ ("Discriminant", place) ] -> let* place = place_of_json place in Ok (E.Discriminant place) | `Assoc [ ("Aggregate", `List [ aggregate_kind; ops ]) ] -> let* aggregate_kind = aggregate_kind_of_json aggregate_kind in let* ops = list_of_json operand_of_json ops in Ok (E.Aggregate (aggregate_kind, ops)) | _ -> Error "") let assumed_fun_id_of_json (js : json) : (A.assumed_fun_id, string) result = match js with | `String "Replace" -> Ok A.Replace | `String "BoxNew" -> Ok A.BoxNew | `String "BoxDeref" -> Ok A.BoxDeref | `String "BoxDerefMut" -> Ok A.BoxDerefMut | `String "BoxFree" -> Ok A.BoxFree | `String "VecNew" -> Ok A.VecNew | `String "VecPush" -> Ok A.VecPush | `String "VecInsert" -> Ok A.VecInsert | `String "VecLen" -> Ok A.VecLen | `String "VecIndex" -> Ok A.VecIndex | `String "VecIndexMut" -> Ok A.VecIndexMut | _ -> Error ("assumed_fun_id_of_json failed on:" ^ show js) let fun_id_of_json (js : json) : (A.fun_id, string) result = combine_error_msgs js "fun_id_of_json" (match js with | `Assoc [ ("Local", id) ] -> let* id = A.FunDeclId.id_of_json id in Ok (A.Local id) | `Assoc [ ("Assumed", fid) ] -> let* fid = assumed_fun_id_of_json fid in Ok (A.Assumed fid) | _ -> Error "") let assertion_of_json (js : json) : (A.assertion, string) result = combine_error_msgs js "assertion_of_json" (match js with | `Assoc [ ("cond", cond); ("expected", expected) ] -> let* cond = operand_of_json cond in let* expected = bool_of_json expected in Ok { A.cond; expected } | _ -> Error "") let fun_sig_of_json (js : json) : (A.fun_sig, string) result = combine_error_msgs js "fun_sig_of_json" (match js with | `Assoc [ ("region_params", region_params); ("num_early_bound_regions", num_early_bound_regions); ("regions_hierarchy", regions_hierarchy); ("type_params", type_params); ("inputs", inputs); ("output", output); ] -> let* region_params = list_of_json region_var_of_json region_params in let* num_early_bound_regions = int_of_json num_early_bound_regions in let* regions_hierarchy = region_var_groups_of_json regions_hierarchy in let* type_params = list_of_json type_var_of_json type_params in let* inputs = list_of_json sty_of_json inputs in let* output = sty_of_json output in Ok { A.region_params; num_early_bound_regions; regions_hierarchy; type_params; inputs; output; } | _ -> Error "") let call_of_json (js : json) : (A.call, string) result = combine_error_msgs js "call_of_json" (match js with | `Assoc [ ("func", func); ("region_params", region_params); ("type_params", type_params); ("args", args); ("dest", dest); ] -> let* func = fun_id_of_json func in let* region_params = list_of_json erased_region_of_json region_params in let* type_params = list_of_json ety_of_json type_params in let* args = list_of_json operand_of_json args in let* dest = place_of_json dest in Ok { A.func; region_params; type_params; args; dest } | _ -> Error "") let rec statement_of_json (js : json) : (A.statement, string) result = combine_error_msgs js "statement_of_json" (match js with | `Assoc [ ("Assign", `List [ place; rvalue ]) ] -> let* place = place_of_json place in let* rvalue = rvalue_of_json rvalue in Ok (A.Assign (place, rvalue)) | `Assoc [ ("FakeRead", place) ] -> let* place = place_of_json place in Ok (A.FakeRead place) | `Assoc [ ("SetDiscriminant", `List [ place; variant_id ]) ] -> let* place = place_of_json place in let* variant_id = T.VariantId.id_of_json variant_id in Ok (A.SetDiscriminant (place, variant_id)) | `Assoc [ ("Drop", place) ] -> let* place = place_of_json place in Ok (A.Drop place) | `Assoc [ ("Assert", assertion) ] -> let* assertion = assertion_of_json assertion in Ok (A.Assert assertion) | `Assoc [ ("Call", call) ] -> let* call = call_of_json call in Ok (A.Call call) | `String "Panic" -> Ok A.Panic | `String "Return" -> Ok A.Return | `Assoc [ ("Break", i) ] -> let* i = int_of_json i in Ok (A.Break i) | `Assoc [ ("Continue", i) ] -> let* i = int_of_json i in Ok (A.Continue i) | `String "Nop" -> Ok A.Nop | `Assoc [ ("Sequence", `List [ st1; st2 ]) ] -> let* st1 = statement_of_json st1 in let* st2 = statement_of_json st2 in Ok (A.Sequence (st1, st2)) | `Assoc [ ("Switch", `List [ op; tgt ]) ] -> let* op = operand_of_json op in let* tgt = switch_targets_of_json tgt in Ok (A.Switch (op, tgt)) | `Assoc [ ("Loop", st) ] -> let* st = statement_of_json st in Ok (A.Loop st) | _ -> Error "") and switch_targets_of_json (js : json) : (A.switch_targets, string) result = combine_error_msgs js "switch_targets_of_json" (match js with | `Assoc [ ("If", `List [ st1; st2 ]) ] -> let* st1 = statement_of_json st1 in let* st2 = statement_of_json st2 in Ok (A.If (st1, st2)) | `Assoc [ ("SwitchInt", `List [ int_ty; tgts; otherwise ]) ] -> let* int_ty = integer_type_of_json int_ty in let* tgts = list_of_json (pair_of_json (list_of_json scalar_value_of_json) statement_of_json) tgts in let* otherwise = statement_of_json otherwise in Ok (A.SwitchInt (int_ty, tgts, otherwise)) | _ -> Error "") let fun_decl_of_json (js : json) : (A.fun_decl, string) result = combine_error_msgs js "fun_decl_of_json" (match js with | `Assoc [ ("def_id", def_id); ("name", name); ("signature", signature); ("arg_count", arg_count); ("locals", locals); ("body", body); ] -> let* def_id = A.FunDeclId.id_of_json def_id in let* name = fun_name_of_json name in let* signature = fun_sig_of_json signature in let* arg_count = int_of_json arg_count in let* locals = list_of_json var_of_json locals in let* body = statement_of_json body in Ok { A.def_id; name; signature; arg_count; locals; body } | _ -> Error "") let g_declaration_group_of_json (id_of_json : json -> ('id, string) result) (js : json) : ('id M.g_declaration_group, string) result = combine_error_msgs js "g_declaration_group_of_json" (match js with | `Assoc [ ("NonRec", `List [ id ]) ] -> let* id = id_of_json id in Ok (M.NonRec id) | `Assoc [ ("Rec", `List [ ids ]) ] -> let* ids = list_of_json id_of_json ids in Ok (M.Rec ids) | _ -> Error "") let type_declaration_group_of_json (js : json) : (M.type_declaration_group, string) result = combine_error_msgs js "type_declaration_group_of_json" (g_declaration_group_of_json T.TypeDeclId.id_of_json js) let fun_declaration_group_of_json (js : json) : (M.fun_declaration_group, string) result = combine_error_msgs js "fun_declaration_group_of_json" (g_declaration_group_of_json A.FunDeclId.id_of_json js) let declaration_group_of_json (js : json) : (M.declaration_group, string) result = combine_error_msgs js "declaration_of_json" (match js with | `Assoc [ ("Type", `List [ decl ]) ] -> let* decl = type_declaration_group_of_json decl in Ok (M.Type decl) | `Assoc [ ("Fun", `List [ decl ]) ] -> let* decl = fun_declaration_group_of_json decl in Ok (M.Fun decl) | _ -> Error "") let cfim_module_of_json (js : json) : (M.cfim_module, string) result = combine_error_msgs js "cfim_module_of_json" (match js with | `Assoc [ ("name", name); ("declarations", declarations); ("types", types); ("functions", functions); ] -> let* name = string_of_json name in let* declarations = list_of_json declaration_group_of_json declarations in let* types = list_of_json type_decl_of_json types in let* functions = list_of_json fun_decl_of_json functions in Ok { M.name; declarations; types; functions } | _ -> Error "")