open Names module T = Types module TU = TypesUtils module V = Values module VU = ValuesUtils module E = Expressions module A = LlbcAst module C = Contexts module M = Modules let option_to_string (to_string : 'a -> string) (x : 'a option) : string = match x with Some x -> "Some (" ^ to_string x ^ ")" | None -> "None" let path_elem_to_string (pe : path_elem) : string = match pe with | Ident s -> s | Disambiguator d -> "{" ^ Disambiguator.to_string d ^ "}" let name_to_string (name : name) : string = String.concat "::" (List.map path_elem_to_string name) let fun_name_to_string (name : fun_name) : string = name_to_string name (** Pretty-printing for types *) module Types = struct let type_var_to_string (tv : T.type_var) : string = tv.name let region_var_to_string (rv : T.region_var) : string = match rv.name with | Some name -> name | None -> T.RegionVarId.to_string rv.index let region_var_id_to_string (rid : T.RegionVarId.id) : string = "rv@" ^ T.RegionVarId.to_string rid let region_id_to_string (rid : T.RegionId.id) : string = "r@" ^ T.RegionId.to_string rid let region_to_string (rid_to_string : 'rid -> string) (r : 'rid T.region) : string = match r with Static -> "'static" | Var rid -> rid_to_string rid let erased_region_to_string (_ : T.erased_region) : string = "'_" let ref_kind_to_string (rk : T.ref_kind) : string = match rk with Mut -> "Mut" | Shared -> "Shared" let assumed_ty_to_string (_ : T.assumed_ty) : string = "Box" type 'r type_formatter = { r_to_string : 'r -> string; type_var_id_to_string : T.TypeVarId.id -> string; type_decl_id_to_string : T.TypeDeclId.id -> string; } type stype_formatter = T.RegionVarId.id T.region type_formatter type rtype_formatter = T.RegionId.id T.region type_formatter type etype_formatter = T.erased_region type_formatter let integer_type_to_string = function | T.Isize -> "isize" | T.I8 -> "i8" | T.I16 -> "i16" | T.I32 -> "i32" | T.I64 -> "i64" | T.I128 -> "i128" | T.Usize -> "usize" | T.U8 -> "u8" | T.U16 -> "u16" | T.U32 -> "u32" | T.U64 -> "u64" | T.U128 -> "u128" let type_id_to_string (fmt : 'r type_formatter) (id : T.type_id) : string = match id with | T.AdtId id -> fmt.type_decl_id_to_string id | T.Tuple -> "" | T.Assumed aty -> ( match aty with | Box -> "alloc::boxed::Box" | Vec -> "alloc::vec::Vec" | Option -> "core::option::Option") let rec ty_to_string (fmt : 'r type_formatter) (ty : 'r T.ty) : string = match ty with | T.Adt (id, regions, tys) -> let is_tuple = match id with T.Tuple -> true | _ -> false in let params = params_to_string fmt is_tuple regions tys in type_id_to_string fmt id ^ params | T.TypeVar tv -> fmt.type_var_id_to_string tv | T.Bool -> "bool" | T.Char -> "char" | T.Never -> "⊥" | T.Integer int_ty -> integer_type_to_string int_ty | T.Str -> "str" | T.Array aty -> "[" ^ ty_to_string fmt aty ^ "; ?]" | T.Slice sty -> "[" ^ ty_to_string fmt sty ^ "]" | T.Ref (r, rty, ref_kind) -> ( match ref_kind with | T.Mut -> "&" ^ fmt.r_to_string r ^ " mut (" ^ ty_to_string fmt rty ^ ")" | T.Shared -> "&" ^ fmt.r_to_string r ^ " (" ^ ty_to_string fmt rty ^ ")") and params_to_string (fmt : 'r type_formatter) (is_tuple : bool) (regions : 'r list) (types : 'r T.ty list) : string = let regions = List.map fmt.r_to_string regions in let types = List.map (ty_to_string fmt) types in let params = String.concat ", " (List.append regions types) in if is_tuple then "(" ^ params ^ ")" else if List.length regions + List.length types > 0 then "<" ^ params ^ ">" else "" let sty_to_string (fmt : stype_formatter) (ty : T.sty) : string = ty_to_string fmt ty let rty_to_string (fmt : rtype_formatter) (ty : T.rty) : string = ty_to_string fmt ty let ety_to_string (fmt : etype_formatter) (ty : T.ety) : string = ty_to_string fmt ty let field_to_string fmt (f : T.field) : string = match f.field_name with | Some field_name -> field_name ^ " : " ^ ty_to_string fmt f.field_ty | None -> ty_to_string fmt f.field_ty let variant_to_string fmt (v : T.variant) : string = v.variant_name ^ "(" ^ String.concat ", " (List.map (field_to_string fmt) v.fields) ^ ")" let type_decl_to_string (type_decl_id_to_string : T.TypeDeclId.id -> string) (def : T.type_decl) : string = let regions = def.region_params in let types = def.type_params in let rid_to_string rid = match List.find_opt (fun rv -> rv.T.index = rid) regions with | Some rv -> region_var_to_string rv | None -> failwith "Unreachable" in let r_to_string = region_to_string rid_to_string in let type_var_id_to_string id = match List.find_opt (fun tv -> tv.T.index = id) types with | Some tv -> type_var_to_string tv | None -> failwith "Unreachable" in let fmt = { r_to_string; type_var_id_to_string; type_decl_id_to_string } in let name = name_to_string def.name in let params = if List.length regions + List.length types > 0 then let regions = List.map region_var_to_string regions in let types = List.map type_var_to_string types in let params = String.concat ", " (List.append regions types) in "<" ^ params ^ ">" else "" in match def.kind with | T.Struct fields -> if List.length fields > 0 then let fields = String.concat "," (List.map (fun f -> "\n " ^ field_to_string fmt f) fields) in "struct " ^ name ^ params ^ "{" ^ fields ^ "}" else "struct " ^ name ^ params ^ "{}" | T.Enum variants -> let variants = List.map (fun v -> "| " ^ variant_to_string fmt v) variants in let variants = String.concat "\n" variants in "enum " ^ name ^ params ^ " =\n" ^ variants | T.Opaque -> "opaque type " ^ name ^ params end module PT = Types (* local module *) (** Pretty-printing for values *) module Values = struct type value_formatter = { rvar_to_string : T.RegionVarId.id -> string; r_to_string : T.RegionId.id -> string; type_var_id_to_string : T.TypeVarId.id -> string; type_decl_id_to_string : T.TypeDeclId.id -> string; adt_variant_to_string : T.TypeDeclId.id -> T.VariantId.id -> string; var_id_to_string : V.VarId.id -> string; adt_field_names : T.TypeDeclId.id -> T.VariantId.id option -> string list option; } let value_to_etype_formatter (fmt : value_formatter) : PT.etype_formatter = { PT.r_to_string = PT.erased_region_to_string; PT.type_var_id_to_string = fmt.type_var_id_to_string; PT.type_decl_id_to_string = fmt.type_decl_id_to_string; } let value_to_rtype_formatter (fmt : value_formatter) : PT.rtype_formatter = { PT.r_to_string = PT.region_to_string fmt.r_to_string; PT.type_var_id_to_string = fmt.type_var_id_to_string; PT.type_decl_id_to_string = fmt.type_decl_id_to_string; } let value_to_stype_formatter (fmt : value_formatter) : PT.stype_formatter = { PT.r_to_string = PT.region_to_string fmt.rvar_to_string; PT.type_var_id_to_string = fmt.type_var_id_to_string; PT.type_decl_id_to_string = fmt.type_decl_id_to_string; } let var_id_to_string (id : V.VarId.id) : string = "var@" ^ V.VarId.to_string id let big_int_to_string (bi : V.big_int) : string = Z.to_string bi let scalar_value_to_string (sv : V.scalar_value) : string = big_int_to_string sv.value ^ ": " ^ PT.integer_type_to_string sv.int_ty let constant_value_to_string (cv : V.constant_value) : string = match cv with | Scalar sv -> scalar_value_to_string sv | Bool b -> Bool.to_string b | Char c -> String.make 1 c | String s -> s let symbolic_value_id_to_string (id : V.SymbolicValueId.id) : string = "s@" ^ V.SymbolicValueId.to_string id let symbolic_value_to_string (fmt : PT.rtype_formatter) (sv : V.symbolic_value) : string = symbolic_value_id_to_string sv.sv_id ^ " : " ^ PT.rty_to_string fmt sv.sv_ty let symbolic_value_proj_to_string (fmt : value_formatter) (sv : V.symbolic_value) (rty : T.rty) : string = symbolic_value_id_to_string sv.sv_id ^ " : " ^ PT.ty_to_string (value_to_rtype_formatter fmt) sv.sv_ty ^ " <: " ^ PT.ty_to_string (value_to_rtype_formatter fmt) rty (* TODO: it may be a good idea to try to factorize this function with * typed_avalue_to_string. At some point we had done it, because [typed_value] * and [typed_avalue] were instances of the same general type [g_typed_value], * but then we removed this general type because it proved to be a bad idea. *) let rec typed_value_to_string (fmt : value_formatter) (v : V.typed_value) : string = let ty_fmt : PT.etype_formatter = value_to_etype_formatter fmt in match v.value with | Concrete cv -> constant_value_to_string cv | Adt av -> ( let field_values = List.map (typed_value_to_string fmt) av.field_values in match v.ty with | T.Adt (T.Tuple, _, _) -> (* Tuple *) "(" ^ String.concat ", " field_values ^ ")" | T.Adt (T.AdtId def_id, _, _) -> (* "Regular" ADT *) let adt_ident = match av.variant_id with | Some vid -> fmt.adt_variant_to_string def_id vid | None -> fmt.type_decl_id_to_string def_id in if List.length field_values > 0 then match fmt.adt_field_names def_id av.V.variant_id with | None -> let field_values = String.concat ", " field_values in adt_ident ^ " (" ^ field_values ^ ")" | Some field_names -> let field_values = List.combine field_names field_values in let field_values = List.map (fun (field, value) -> field ^ " = " ^ value ^ ";") field_values in let field_values = String.concat " " field_values in adt_ident ^ " { " ^ field_values ^ " }" else adt_ident | T.Adt (T.Assumed aty, _, _) -> ( (* Assumed type *) match (aty, field_values) with | Box, [ bv ] -> "@Box(" ^ bv ^ ")" | Option, _ -> if av.variant_id = Some T.option_some_id then "@Option::Some(" ^ Collections.List.to_cons_nil field_values ^ ")" else if av.variant_id = Some T.option_none_id then ( assert (field_values = []); "@Option::None") else failwith "Unreachable" | Vec, _ -> "@Vec[" ^ String.concat ", " field_values ^ "]" | _ -> failwith "Inconsistent value") | _ -> failwith "Inconsistent typed value") | Bottom -> "⊥ : " ^ PT.ty_to_string ty_fmt v.ty | Borrow bc -> borrow_content_to_string fmt bc | Loan lc -> loan_content_to_string fmt lc | Symbolic s -> symbolic_value_to_string (value_to_rtype_formatter fmt) s and borrow_content_to_string (fmt : value_formatter) (bc : V.borrow_content) : string = match bc with | SharedBorrow (_, bid) -> "⌊shared@" ^ V.BorrowId.to_string bid ^ "⌋" | MutBorrow (bid, tv) -> "&mut@" ^ V.BorrowId.to_string bid ^ " (" ^ typed_value_to_string fmt tv ^ ")" | InactivatedMutBorrow (_, bid) -> "⌊inactivated_mut@" ^ V.BorrowId.to_string bid ^ "⌋" and loan_content_to_string (fmt : value_formatter) (lc : V.loan_content) : string = match lc with | SharedLoan (loans, v) -> let loans = V.BorrowId.Set.to_string None loans in "@shared_loan(" ^ loans ^ ", " ^ typed_value_to_string fmt v ^ ")" | MutLoan bid -> "⌊mut@" ^ V.BorrowId.to_string bid ^ "⌋" let abstract_shared_borrow_to_string (fmt : value_formatter) (abs : V.abstract_shared_borrow) : string = match abs with | AsbBorrow bid -> V.BorrowId.to_string bid | AsbProjReborrows (sv, rty) -> "{" ^ symbolic_value_proj_to_string fmt sv rty ^ "}" let abstract_shared_borrows_to_string (fmt : value_formatter) (abs : V.abstract_shared_borrows) : string = "{" ^ String.concat "," (List.map (abstract_shared_borrow_to_string fmt) abs) ^ "}" let rec aproj_to_string (fmt : value_formatter) (pv : V.aproj) : string = match pv with | AProjLoans (sv, given_back) -> let given_back = if given_back = [] then "" else let given_back = List.map snd given_back in let given_back = List.map (aproj_to_string fmt) given_back in " (" ^ String.concat "," given_back ^ ") " in "⌊" ^ symbolic_value_to_string (value_to_rtype_formatter fmt) sv ^ given_back ^ "⌋" | AProjBorrows (sv, rty) -> "(" ^ symbolic_value_proj_to_string fmt sv rty ^ ")" | AEndedProjLoans (_, given_back) -> if given_back = [] then "_" else let given_back = List.map snd given_back in let given_back = List.map (aproj_to_string fmt) given_back in "ended_aproj_loans (" ^ String.concat "," given_back ^ ")" | AEndedProjBorrows _mv -> "_" | AIgnoredProjBorrows -> "_" let rec typed_avalue_to_string (fmt : value_formatter) (v : V.typed_avalue) : string = let ty_fmt : PT.rtype_formatter = value_to_rtype_formatter fmt in match v.value with | AConcrete cv -> constant_value_to_string cv | AAdt av -> ( let field_values = List.map (typed_avalue_to_string fmt) av.field_values in match v.ty with | T.Adt (T.Tuple, _, _) -> (* Tuple *) "(" ^ String.concat ", " field_values ^ ")" | T.Adt (T.AdtId def_id, _, _) -> (* "Regular" ADT *) let adt_ident = match av.variant_id with | Some vid -> fmt.adt_variant_to_string def_id vid | None -> fmt.type_decl_id_to_string def_id in if List.length field_values > 0 then match fmt.adt_field_names def_id av.V.variant_id with | None -> let field_values = String.concat ", " field_values in adt_ident ^ " (" ^ field_values ^ ")" | Some field_names -> let field_values = List.combine field_names field_values in let field_values = List.map (fun (field, value) -> field ^ " = " ^ value ^ ";") field_values in let field_values = String.concat " " field_values in adt_ident ^ " { " ^ field_values ^ " }" else adt_ident | T.Adt (T.Assumed aty, _, _) -> ( (* Assumed type *) match (aty, field_values) with | Box, [ bv ] -> "@Box(" ^ bv ^ ")" | _ -> failwith "Inconsistent value") | _ -> failwith "Inconsistent typed value") | ABottom -> "⊥ : " ^ PT.ty_to_string ty_fmt v.ty | ABorrow bc -> aborrow_content_to_string fmt bc | ALoan lc -> aloan_content_to_string fmt lc | ASymbolic s -> aproj_to_string fmt s | AIgnored -> "_" and aloan_content_to_string (fmt : value_formatter) (lc : V.aloan_content) : string = match lc with | AMutLoan (bid, av) -> "⌊mut@" ^ V.BorrowId.to_string bid ^ ", " ^ typed_avalue_to_string fmt av ^ "⌋" | ASharedLoan (loans, v, av) -> let loans = V.BorrowId.Set.to_string None loans in "@shared_loan(" ^ loans ^ ", " ^ typed_value_to_string fmt v ^ ", " ^ typed_avalue_to_string fmt av ^ ")" | AEndedMutLoan ml -> "@ended_mut_loan{" ^ typed_avalue_to_string fmt ml.child ^ "; " ^ typed_avalue_to_string fmt ml.given_back ^ " }" | AEndedSharedLoan (v, av) -> "@ended_shared_loan(" ^ typed_value_to_string fmt v ^ ", " ^ typed_avalue_to_string fmt av ^ ")" | AIgnoredMutLoan (bid, av) -> "@ignored_mut_loan(" ^ V.BorrowId.to_string bid ^ ", " ^ typed_avalue_to_string fmt av ^ ")" | AEndedIgnoredMutLoan ml -> "@ended_ignored_mut_loan{ " ^ typed_avalue_to_string fmt ml.child ^ "; " ^ typed_avalue_to_string fmt ml.given_back ^ "}" | AIgnoredSharedLoan sl -> "@ignored_shared_loan(" ^ typed_avalue_to_string fmt sl ^ ")" and aborrow_content_to_string (fmt : value_formatter) (bc : V.aborrow_content) : string = match bc with | AMutBorrow (_, bid, av) -> "&mut@" ^ V.BorrowId.to_string bid ^ " (" ^ typed_avalue_to_string fmt av ^ ")" | ASharedBorrow bid -> "⌊shared@" ^ V.BorrowId.to_string bid ^ "⌋" | AIgnoredMutBorrow (opt_bid, av) -> "@ignored_mut_borrow(" ^ option_to_string V.BorrowId.to_string opt_bid ^ ", " ^ typed_avalue_to_string fmt av ^ ")" | AEndedMutBorrow (_mv, child) -> "@ended_mut_borrow(" ^ typed_avalue_to_string fmt child ^ ")" | AEndedIgnoredMutBorrow { child; given_back_loans_proj; given_back_meta = _ } -> "@ended_ignored_mut_borrow{ " ^ typed_avalue_to_string fmt child ^ "; " ^ typed_avalue_to_string fmt given_back_loans_proj ^ ")" | AEndedSharedBorrow -> "@ended_shared_borrow" | AProjSharedBorrow sb -> "@ignored_shared_borrow(" ^ abstract_shared_borrows_to_string fmt sb ^ ")" let abs_to_string (fmt : value_formatter) (indent : string) (indent_incr : string) (abs : V.abs) : string = let indent2 = indent ^ indent_incr in let avs = List.map (fun av -> indent2 ^ typed_avalue_to_string fmt av) abs.avalues in let avs = String.concat ",\n" avs in indent ^ "abs@" ^ V.AbstractionId.to_string abs.abs_id ^ "{parents=" ^ V.AbstractionId.Set.to_string None abs.parents ^ "}" ^ "{regions=" ^ T.RegionId.Set.to_string None abs.regions ^ "}" ^ " {\n" ^ avs ^ "\n" ^ indent ^ "}" end module PV = Values (* local module *) (** Pretty-printing for contexts *) module Contexts = struct let binder_to_string (bv : C.binder) : string = match bv.name with | None -> PV.var_id_to_string bv.index | Some name -> name let env_elem_to_string (fmt : PV.value_formatter) (indent : string) (indent_incr : string) (ev : C.env_elem) : string = match ev with | Var (var, tv) -> let bv = match var with Some var -> binder_to_string var | None -> "_" in indent ^ bv ^ " -> " ^ PV.typed_value_to_string fmt tv ^ " ;" | Abs abs -> PV.abs_to_string fmt indent indent_incr abs | Frame -> failwith "Can't print a Frame element" let opt_env_elem_to_string (fmt : PV.value_formatter) (indent : string) (indent_incr : string) (ev : C.env_elem option) : string = match ev with | None -> indent ^ "..." | Some ev -> env_elem_to_string fmt indent indent_incr ev (** Filters "dummy" bindings from an environment, to gain space and clarity/ See [env_to_string]. *) let filter_env (env : C.env) : C.env_elem option list = (* We filter: * - non-dummy bindings which point to ⊥ * - dummy bindings which don't contain loans nor borrows * Note that the first case can sometimes be confusing: we may try to improve * it... *) let filter_elem (ev : C.env_elem) : C.env_elem option = match ev with | Var (Some _, tv) -> (* Not a dummy binding: check if the value is ⊥ *) if VU.is_bottom tv.value then None else Some ev | Var (None, tv) -> (* Dummy binding: check if the value contains borrows or loans *) if VU.borrows_in_value tv || VU.loans_in_value tv then Some ev else None | _ -> Some ev in let env = List.map filter_elem env in (* We collapse groups of filtered values - so that we can print one * single "..." for a whole group of filtered values *) let rec group_filtered (env : C.env_elem option list) : C.env_elem option list = match env with | [] -> [] | None :: None :: env -> group_filtered (None :: env) | x :: env -> x :: group_filtered env in group_filtered env (** Environments can have a lot of dummy or uninitialized values: [filter] allows to filter them when printing, replacing groups of such bindings with "..." to gain space and clarity. *) let env_to_string (filter : bool) (fmt : PV.value_formatter) (env : C.env) : string = let env = if filter then filter_env env else List.map (fun ev -> Some ev) env in "{\n" ^ String.concat "\n" (List.map (fun ev -> opt_env_elem_to_string fmt " " " " ev) env) ^ "\n}" type ctx_formatter = PV.value_formatter let ctx_to_etype_formatter (fmt : ctx_formatter) : PT.etype_formatter = PV.value_to_etype_formatter fmt let ctx_to_rtype_formatter (fmt : ctx_formatter) : PT.rtype_formatter = PV.value_to_rtype_formatter fmt let type_ctx_to_adt_variant_to_string_fun (ctx : T.type_decl T.TypeDeclId.Map.t) : T.TypeDeclId.id -> T.VariantId.id -> string = fun def_id variant_id -> let def = T.TypeDeclId.Map.find def_id ctx in match def.kind with | Struct _ | Opaque -> failwith "Unreachable" | Enum variants -> let variant = T.VariantId.nth variants variant_id in name_to_string def.name ^ "::" ^ variant.variant_name let type_ctx_to_adt_field_names_fun (ctx : T.type_decl T.TypeDeclId.Map.t) : T.TypeDeclId.id -> T.VariantId.id option -> string list option = fun def_id opt_variant_id -> let def = T.TypeDeclId.Map.find def_id ctx in let fields = TU.type_decl_get_fields def opt_variant_id in (* There are two cases: either all the fields have names, or none of them * has names *) let has_names = List.exists (fun f -> Option.is_some f.T.field_name) fields in if has_names then let fields = List.map (fun f -> Option.get f.T.field_name) fields in Some fields else None let eval_ctx_to_ctx_formatter (ctx : C.eval_ctx) : ctx_formatter = (* We shouldn't use rvar_to_string *) let rvar_to_string _r = failwith "Unexpected use of rvar_to_string" in let r_to_string r = PT.region_id_to_string r in let type_var_id_to_string vid = let v = C.lookup_type_var ctx vid in v.name in let type_decl_id_to_string def_id = let def = C.ctx_lookup_type_decl ctx def_id in name_to_string def.name in let adt_variant_to_string = type_ctx_to_adt_variant_to_string_fun ctx.type_context.type_decls in let var_id_to_string vid = let bv = C.ctx_lookup_binder ctx vid in binder_to_string bv in let adt_field_names = type_ctx_to_adt_field_names_fun ctx.type_context.type_decls in { rvar_to_string; r_to_string; type_var_id_to_string; type_decl_id_to_string; adt_variant_to_string; var_id_to_string; adt_field_names; } (** Split an [env] at every occurrence of [Frame], eliminating those elements. Also reorders the frames and the values in the frames according to the following order: * frames: from the current frame to the first pushed (oldest frame) * values: from the first pushed (oldest) to the last pushed *) let split_env_according_to_frames (env : C.env) : C.env list = let rec split_aux (frames : C.env list) (curr_frame : C.env) (env : C.env) = match env with | [] -> if List.length curr_frame > 0 then curr_frame :: frames else frames | Frame :: env' -> split_aux (curr_frame :: frames) [] env' | ev :: env' -> split_aux frames (ev :: curr_frame) env' in let frames = split_aux [] [] env in frames let eval_ctx_to_string (ctx : C.eval_ctx) : string = let fmt = eval_ctx_to_ctx_formatter ctx in let ended_regions = T.RegionId.Set.to_string None ctx.ended_regions in let frames = split_env_according_to_frames ctx.env in let num_frames = List.length frames in let frames = List.mapi (fun i f -> let num_bindings = ref 0 in let num_dummies = ref 0 in let num_abs = ref 0 in List.iter (fun ev -> match ev with | C.Var (None, _) -> num_dummies := !num_abs + 1 | C.Var (Some _, _) -> num_bindings := !num_bindings + 1 | C.Abs _ -> num_abs := !num_abs + 1 | _ -> raise (Failure "Unreachable")) f; "\n# Frame " ^ string_of_int i ^ ":" ^ "\n- locals: " ^ string_of_int !num_bindings ^ "\n- dummy bindings: " ^ string_of_int !num_dummies ^ "\n- abstractions: " ^ string_of_int !num_abs ^ "\n" ^ env_to_string true fmt f ^ "\n") frames in "# Ended regions: " ^ ended_regions ^ "\n" ^ "# " ^ string_of_int num_frames ^ " frame(s)\n" ^ String.concat "" frames end module PC = Contexts (* local module *) (** Pretty-printing for contexts (generic functions) *) module LlbcAst = struct let var_to_string (var : A.var) : string = match var.name with | None -> V.VarId.to_string var.index | Some name -> name type ast_formatter = { rvar_to_string : T.RegionVarId.id -> string; r_to_string : T.RegionId.id -> string; type_var_id_to_string : T.TypeVarId.id -> string; type_decl_id_to_string : T.TypeDeclId.id -> string; adt_variant_to_string : T.TypeDeclId.id -> T.VariantId.id -> string; adt_field_to_string : T.TypeDeclId.id -> T.VariantId.id option -> T.FieldId.id -> string option; var_id_to_string : V.VarId.id -> string; adt_field_names : T.TypeDeclId.id -> T.VariantId.id option -> string list option; fun_decl_id_to_string : A.FunDeclId.id -> string; } let ast_to_ctx_formatter (fmt : ast_formatter) : PC.ctx_formatter = { PV.rvar_to_string = fmt.rvar_to_string; PV.r_to_string = fmt.r_to_string; PV.type_var_id_to_string = fmt.type_var_id_to_string; PV.type_decl_id_to_string = fmt.type_decl_id_to_string; PV.adt_variant_to_string = fmt.adt_variant_to_string; PV.var_id_to_string = fmt.var_id_to_string; PV.adt_field_names = fmt.adt_field_names; } let ast_to_value_formatter (fmt : ast_formatter) : PV.value_formatter = ast_to_ctx_formatter fmt let ast_to_etype_formatter (fmt : ast_formatter) : PT.etype_formatter = { PT.r_to_string = PT.erased_region_to_string; PT.type_var_id_to_string = fmt.type_var_id_to_string; PT.type_decl_id_to_string = fmt.type_decl_id_to_string; } let ast_to_rtype_formatter (fmt : ast_formatter) : PT.rtype_formatter = { PT.r_to_string = PT.region_to_string fmt.r_to_string; PT.type_var_id_to_string = fmt.type_var_id_to_string; PT.type_decl_id_to_string = fmt.type_decl_id_to_string; } let ast_to_stype_formatter (fmt : ast_formatter) : PT.stype_formatter = { PT.r_to_string = PT.region_to_string fmt.rvar_to_string; PT.type_var_id_to_string = fmt.type_var_id_to_string; PT.type_decl_id_to_string = fmt.type_decl_id_to_string; } let type_ctx_to_adt_field_to_string_fun (ctx : T.type_decl T.TypeDeclId.Map.t) : T.TypeDeclId.id -> T.VariantId.id option -> T.FieldId.id -> string option = fun def_id opt_variant_id field_id -> let def = T.TypeDeclId.Map.find def_id ctx in let fields = TU.type_decl_get_fields def opt_variant_id in let field = T.FieldId.nth fields field_id in field.T.field_name let eval_ctx_to_ast_formatter (ctx : C.eval_ctx) : ast_formatter = let ctx_fmt = PC.eval_ctx_to_ctx_formatter ctx in let adt_field_to_string = type_ctx_to_adt_field_to_string_fun ctx.type_context.type_decls in let fun_decl_id_to_string def_id = let def = C.ctx_lookup_fun_decl ctx def_id in fun_name_to_string def.name in { rvar_to_string = ctx_fmt.PV.rvar_to_string; r_to_string = ctx_fmt.PV.r_to_string; type_var_id_to_string = ctx_fmt.PV.type_var_id_to_string; type_decl_id_to_string = ctx_fmt.PV.type_decl_id_to_string; adt_variant_to_string = ctx_fmt.PV.adt_variant_to_string; var_id_to_string = ctx_fmt.PV.var_id_to_string; adt_field_names = ctx_fmt.PV.adt_field_names; adt_field_to_string; fun_decl_id_to_string; } let fun_decl_to_ast_formatter (type_decls : T.type_decl T.TypeDeclId.Map.t) (fun_decls : A.fun_decl A.FunDeclId.Map.t) (fdef : A.fun_decl) : ast_formatter = let rvar_to_string r = let rvar = T.RegionVarId.nth fdef.signature.region_params r in PT.region_var_to_string rvar in let r_to_string r = PT.region_id_to_string r in let type_var_id_to_string vid = let var = T.TypeVarId.nth fdef.signature.type_params vid in PT.type_var_to_string var in let type_decl_id_to_string def_id = let def = T.TypeDeclId.Map.find def_id type_decls in name_to_string def.name in let adt_variant_to_string = PC.type_ctx_to_adt_variant_to_string_fun type_decls in let var_id_to_string vid = let var = V.VarId.nth (Option.get fdef.body).locals vid in var_to_string var in let adt_field_names = PC.type_ctx_to_adt_field_names_fun type_decls in let adt_field_to_string = type_ctx_to_adt_field_to_string_fun type_decls in let fun_decl_id_to_string def_id = let def = A.FunDeclId.Map.find def_id fun_decls in fun_name_to_string def.name in { rvar_to_string; r_to_string; type_var_id_to_string; type_decl_id_to_string; adt_variant_to_string; var_id_to_string; adt_field_names; adt_field_to_string; fun_decl_id_to_string; } let rec projection_to_string (fmt : ast_formatter) (inside : string) (p : E.projection) : string = match p with | [] -> inside | pe :: p' -> ( let s = projection_to_string fmt inside p' in match pe with | E.Deref -> "*(" ^ s ^ ")" | E.DerefBox -> "deref_box(" ^ s ^ ")" | E.Field (E.ProjOption variant_id, fid) -> assert (variant_id = T.option_some_id); assert (fid = T.FieldId.zero); "(" ^ s ^ " as Option::Some)." ^ T.FieldId.to_string fid | E.Field (E.ProjTuple _, fid) -> "(" ^ s ^ ")." ^ T.FieldId.to_string fid | E.Field (E.ProjAdt (adt_id, opt_variant_id), fid) -> ( let field_name = match fmt.adt_field_to_string adt_id opt_variant_id fid with | Some field_name -> field_name | None -> T.FieldId.to_string fid in match opt_variant_id with | None -> "(" ^ s ^ ")." ^ field_name | Some variant_id -> let variant_name = fmt.adt_variant_to_string adt_id variant_id in "(" ^ s ^ " as " ^ variant_name ^ ")." ^ field_name)) let place_to_string (fmt : ast_formatter) (p : E.place) : string = let var = fmt.var_id_to_string p.E.var_id in projection_to_string fmt var p.E.projection let unop_to_string (unop : E.unop) : string = match unop with E.Not -> "¬" | E.Neg -> "-" let binop_to_string (binop : E.binop) : string = match binop with | E.BitXor -> "^" | E.BitAnd -> "&" | E.BitOr -> "|" | E.Eq -> "==" | E.Lt -> "<" | E.Le -> "<=" | E.Ne -> "!=" | E.Ge -> ">=" | E.Gt -> ">" | E.Div -> "/" | E.Rem -> "%" | E.Add -> "+" | E.Sub -> "-" | E.Mul -> "*" | E.Shl -> "<<" | E.Shr -> ">>" let rec operand_constant_value_to_string (fmt : ast_formatter) (cv : E.operand_constant_value) : string = match cv with | E.ConstantValue cv -> PV.constant_value_to_string cv | E.ConstantAdt (variant_id, field_values) -> (* This is a bit annoying, because we don't have context information * to convert the ADT to a value, so we do the best we can in the * simplest manner. Anyway, those printing utilitites are only used * for debugging, and complex constant values are not common. * We might want to store type information in the operand constant values * in the future. *) let variant_id = option_to_string T.VariantId.to_string variant_id in let field_values = List.map (operand_constant_value_to_string fmt) field_values in "ConstantAdt " ^ variant_id ^ " {" ^ String.concat ", " field_values ^ "}" let operand_to_string (fmt : ast_formatter) (op : E.operand) : string = match op with | E.Copy p -> "copy " ^ place_to_string fmt p | E.Move p -> "move " ^ place_to_string fmt p | E.Constant (ty, cv) -> (* For clarity, we also print the typing information: see the comment in * [operand_constant_value_to_string] *) "(" ^ operand_constant_value_to_string fmt cv ^ " : " ^ PT.ety_to_string (ast_to_etype_formatter fmt) ty ^ ")" let rvalue_to_string (fmt : ast_formatter) (rv : E.rvalue) : string = match rv with | E.Use op -> operand_to_string fmt op | E.Ref (p, bk) -> ( let p = place_to_string fmt p in match bk with | E.Shared -> "&" ^ p | E.Mut -> "&mut " ^ p | E.TwoPhaseMut -> "&two-phase " ^ p) | E.UnaryOp (unop, op) -> unop_to_string unop ^ " " ^ operand_to_string fmt op | E.BinaryOp (binop, op1, op2) -> operand_to_string fmt op1 ^ " " ^ binop_to_string binop ^ " " ^ operand_to_string fmt op2 | E.Discriminant p -> "discriminant(" ^ place_to_string fmt p ^ ")" | E.Aggregate (akind, ops) -> ( let ops = List.map (operand_to_string fmt) ops in match akind with | E.AggregatedTuple -> "(" ^ String.concat ", " ops ^ ")" | E.AggregatedAdt (def_id, opt_variant_id, _regions, _types) -> let adt_name = fmt.type_decl_id_to_string def_id in let variant_name = match opt_variant_id with | None -> adt_name | Some variant_id -> adt_name ^ "::" ^ fmt.adt_variant_to_string def_id variant_id in let fields = match fmt.adt_field_names def_id opt_variant_id with | None -> "(" ^ String.concat ", " ops ^ ")" | Some field_names -> let fields = List.combine field_names ops in let fields = List.map (fun (field, value) -> field ^ " = " ^ value ^ ";") fields in let fields = String.concat " " fields in "{ " ^ fields ^ " }" in variant_name ^ " " ^ fields) let rec statement_to_string (fmt : ast_formatter) (indent : string) (indent_incr : string) (st : A.statement) : string = match st with | A.Assign (p, rv) -> indent ^ place_to_string fmt p ^ " := " ^ rvalue_to_string fmt rv | A.FakeRead p -> "fake_read " ^ place_to_string fmt p | A.SetDiscriminant (p, variant_id) -> (* TODO: improve this to lookup the variant name by using the def id *) indent ^ "set_discriminant(" ^ place_to_string fmt p ^ ", " ^ T.VariantId.to_string variant_id ^ ")" | A.Drop p -> indent ^ "drop(" ^ place_to_string fmt p ^ ")" | A.Assert a -> let cond = operand_to_string fmt a.A.cond in if a.A.expected then indent ^ "assert(" ^ cond ^ ")" else indent ^ "assert(¬" ^ cond ^ ")" | A.Call call -> let ty_fmt = ast_to_etype_formatter fmt in let params = if List.length call.A.type_params > 0 then "<" ^ String.concat "," (List.map (PT.ty_to_string ty_fmt) call.A.type_params) ^ ">" else "" in let args = List.map (operand_to_string fmt) call.A.args in let args = "(" ^ String.concat ", " args ^ ")" in let name_params = match call.A.func with | A.Regular fid -> fmt.fun_decl_id_to_string fid ^ params | A.Assumed fid -> ( match fid with | A.Replace -> "core::mem::replace" ^ params | A.BoxNew -> "alloc::boxed::Box" ^ params ^ "::new" | A.BoxDeref -> "core::ops::deref::Deref::deref" | A.BoxDerefMut -> "core::ops::deref::DerefMut" ^ params ^ "::deref_mut" | A.BoxFree -> "alloc::alloc::box_free" ^ params | A.VecNew -> "alloc::vec::Vec" ^ params ^ "::new" | A.VecPush -> "alloc::vec::Vec" ^ params ^ "::push" | A.VecInsert -> "alloc::vec::Vec" ^ params ^ "::insert" | A.VecLen -> "alloc::vec::Vec" ^ params ^ "::len" | A.VecIndex -> "core::ops::index::Index::index" | A.VecIndexMut -> "core::ops::index::IndexMut::index_mut") in let dest = place_to_string fmt call.A.dest in indent ^ dest ^ " := move " ^ name_params ^ args | A.Panic -> indent ^ "panic" | A.Return -> indent ^ "return" | A.Break i -> indent ^ "break " ^ string_of_int i | A.Continue i -> indent ^ "continue " ^ string_of_int i | A.Nop -> indent ^ "nop" | A.Sequence (st1, st2) -> statement_to_string fmt indent indent_incr st1 ^ ";\n" ^ statement_to_string fmt indent indent_incr st2 | A.Switch (op, tgts) -> ( let op = operand_to_string fmt op in match tgts with | A.If (true_st, false_st) -> let inner_indent = indent ^ indent_incr in let inner_to_string = statement_to_string fmt inner_indent indent_incr in let true_st = inner_to_string true_st in let false_st = inner_to_string false_st in indent ^ "if (" ^ op ^ ") {\n" ^ true_st ^ "\n" ^ indent ^ "}\n" ^ indent ^ "else {\n" ^ false_st ^ "\n" ^ indent ^ "}" | A.SwitchInt (_ty, branches, otherwise) -> let indent1 = indent ^ indent_incr in let indent2 = indent1 ^ indent_incr in let inner_to_string2 = statement_to_string fmt indent2 indent_incr in let branches = List.map (fun (svl, be) -> let svl = List.map (fun sv -> "| " ^ PV.scalar_value_to_string sv) svl in let svl = String.concat " " svl in indent1 ^ svl ^ " => {\n" ^ inner_to_string2 be ^ "\n" ^ indent1 ^ "}") branches in let branches = String.concat "\n" branches in let branches = branches ^ "\n" ^ indent1 ^ "_ => {\n" ^ inner_to_string2 otherwise ^ "\n" ^ indent1 ^ "}" in indent ^ "switch (" ^ op ^ ") {\n" ^ branches ^ "\n" ^ indent ^ "}") | A.Loop loop_st -> indent ^ "loop {\n" ^ statement_to_string fmt (indent ^ indent_incr) indent_incr loop_st ^ "\n" ^ indent ^ "}" let var_to_string (v : A.var) : string = match v.name with None -> PV.var_id_to_string v.index | Some name -> name let fun_decl_to_string (fmt : ast_formatter) (indent : string) (indent_incr : string) (def : A.fun_decl) : string = let sty_fmt = ast_to_stype_formatter fmt in let sty_to_string = PT.sty_to_string sty_fmt in let ety_fmt = ast_to_etype_formatter fmt in let ety_to_string = PT.ety_to_string ety_fmt in let sg = def.signature in (* Function name *) let name = fun_name_to_string def.A.name in (* Region/type parameters *) let regions = sg.region_params in let types = sg.type_params in let params = if List.length regions + List.length types = 0 then "" else let regions = List.map PT.region_var_to_string regions in let types = List.map PT.type_var_to_string types in "<" ^ String.concat "," (List.append regions types) ^ ">" in (* Return type *) let ret_ty = sg.output in let ret_ty = if TU.ty_is_unit ret_ty then "" else " -> " ^ sty_to_string ret_ty in (* We print the declaration differently if it is opaque (no body) or transparent * (we have access to a body) *) match def.body with | None -> (* Arguments *) let input_tys = sg.inputs in let args = List.map sty_to_string input_tys in let args = String.concat ", " args in (* Put everything together *) indent ^ "opaque fn " ^ name ^ params ^ "(" ^ args ^ ")" ^ ret_ty | Some body -> (* Arguments *) let inputs = List.tl body.locals in let inputs, _aux_locals = Collections.List.split_at inputs body.arg_count in let args = List.combine inputs sg.inputs in let args = List.map (fun (var, rty) -> var_to_string var ^ " : " ^ sty_to_string rty) args in let args = String.concat ", " args in (* All the locals (with erased regions) *) let locals = List.map (fun var -> indent ^ indent_incr ^ var_to_string var ^ " : " ^ ety_to_string var.var_ty ^ ";") body.locals in let locals = String.concat "\n" locals in (* Body *) let body = statement_to_string fmt (indent ^ indent_incr) indent_incr body.body in (* Put everything together *) indent ^ "fn " ^ name ^ params ^ "(" ^ args ^ ")" ^ ret_ty ^ " {\n" ^ locals ^ "\n\n" ^ body ^ "\n" ^ indent ^ "}" end module PA = LlbcAst (* local module *) (** Pretty-printing for ASTs (functions based on a definition context) *) module Module = struct (** This function pretty-prints a type definition by using a definition context *) let type_decl_to_string (type_context : T.type_decl T.TypeDeclId.Map.t) (def : T.type_decl) : string = let type_decl_id_to_string (id : T.TypeDeclId.id) : string = let def = T.TypeDeclId.Map.find id type_context in name_to_string def.name in PT.type_decl_to_string type_decl_id_to_string def (** Generate an [ast_formatter] by using a definition context in combination with the variables local to a function's definition *) let def_ctx_to_ast_formatter (type_context : T.type_decl T.TypeDeclId.Map.t) (fun_context : A.fun_decl A.FunDeclId.Map.t) (def : A.fun_decl) : PA.ast_formatter = let rvar_to_string vid = let var = T.RegionVarId.nth def.signature.region_params vid in PT.region_var_to_string var in let r_to_string vid = (* TODO: we might want something more informative *) PT.region_id_to_string vid in let type_var_id_to_string vid = let var = T.TypeVarId.nth def.signature.type_params vid in PT.type_var_to_string var in let type_decl_id_to_string def_id = let def = T.TypeDeclId.Map.find def_id type_context in name_to_string def.name in let fun_decl_id_to_string def_id = let def = A.FunDeclId.Map.find def_id fun_context in fun_name_to_string def.name in let var_id_to_string vid = let var = V.VarId.nth (Option.get def.body).locals vid in PA.var_to_string var in let adt_variant_to_string = PC.type_ctx_to_adt_variant_to_string_fun type_context in let adt_field_to_string = PA.type_ctx_to_adt_field_to_string_fun type_context in let adt_field_names = PC.type_ctx_to_adt_field_names_fun type_context in { rvar_to_string; r_to_string; type_var_id_to_string; type_decl_id_to_string; adt_variant_to_string; adt_field_to_string; var_id_to_string; adt_field_names; fun_decl_id_to_string; } (** This function pretty-prints a function definition by using a definition context *) let fun_decl_to_string (type_context : T.type_decl T.TypeDeclId.Map.t) (fun_context : A.fun_decl A.FunDeclId.Map.t) (def : A.fun_decl) : string = let fmt = def_ctx_to_ast_formatter type_context fun_context def in PA.fun_decl_to_string fmt "" " " def let module_to_string (m : M.llbc_module) : string = let types_defs_map, funs_defs_map = M.compute_defs_maps m in (* The types *) let type_decls = List.map (type_decl_to_string types_defs_map) m.M.types in (* The functions *) let fun_decls = List.map (fun_decl_to_string types_defs_map funs_defs_map) m.M.functions in (* Put everything together *) let all_defs = List.append type_decls fun_decls in String.concat "\n\n" all_defs end (** Pretty-printing for LLBC ASTs (functions based on an evaluation context) *) module EvalCtxLlbcAst = struct let ety_to_string (ctx : C.eval_ctx) (t : T.ety) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in let fmt = PC.ctx_to_etype_formatter fmt in PT.ety_to_string fmt t let rty_to_string (ctx : C.eval_ctx) (t : T.rty) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in let fmt = PC.ctx_to_rtype_formatter fmt in PT.rty_to_string fmt t let borrow_content_to_string (ctx : C.eval_ctx) (bc : V.borrow_content) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in PV.borrow_content_to_string fmt bc let loan_content_to_string (ctx : C.eval_ctx) (lc : V.loan_content) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in PV.loan_content_to_string fmt lc let aborrow_content_to_string (ctx : C.eval_ctx) (bc : V.aborrow_content) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in PV.aborrow_content_to_string fmt bc let aloan_content_to_string (ctx : C.eval_ctx) (lc : V.aloan_content) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in PV.aloan_content_to_string fmt lc let aproj_to_string (ctx : C.eval_ctx) (p : V.aproj) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in PV.aproj_to_string fmt p let symbolic_value_to_string (ctx : C.eval_ctx) (sv : V.symbolic_value) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in let fmt = PC.ctx_to_rtype_formatter fmt in PV.symbolic_value_to_string fmt sv let typed_value_to_string (ctx : C.eval_ctx) (v : V.typed_value) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in PV.typed_value_to_string fmt v let typed_avalue_to_string (ctx : C.eval_ctx) (v : V.typed_avalue) : string = let fmt = PC.eval_ctx_to_ctx_formatter ctx in PV.typed_avalue_to_string fmt v let operand_constant_value_to_string (ctx : C.eval_ctx) (cv : E.operand_constant_value) : string = let fmt = PA.eval_ctx_to_ast_formatter ctx in PA.operand_constant_value_to_string fmt cv let place_to_string (ctx : C.eval_ctx) (op : E.place) : string = let fmt = PA.eval_ctx_to_ast_formatter ctx in PA.place_to_string fmt op let operand_to_string (ctx : C.eval_ctx) (op : E.operand) : string = let fmt = PA.eval_ctx_to_ast_formatter ctx in PA.operand_to_string fmt op let statement_to_string (ctx : C.eval_ctx) (indent : string) (indent_incr : string) (e : A.statement) : string = let fmt = PA.eval_ctx_to_ast_formatter ctx in PA.statement_to_string fmt indent indent_incr e end