core2.ml1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183(* * Generic Transformers: Camlp5 syntax extension. * Copyright (C) 2016-2019 * Dmitry Boulytchev, Dmitrii Kosarev aka Kakadu * St.Petersburg State University, JetBrains Research *) #load "q_MLast.cmo";; open Ploc let oops loc str = Ploc.raise loc (Failure str) let get_val loc = function | VaVal x -> x | _ -> failwith "could not get VaVal _ (should not happen)" (* type descr_t = * [ `Poly of * [ `Con of string * ctyp typ list | `Type of ctyp typ ] list * | `Struct of (string * bool * ctyp typ) list * | `Tuple of ctyp typ list * | `Vari of * [ `Con of string * ctyp typ list * | `Tuple of ctyp typ list * | `Type of ctyp typ ] * list ] * * let tdecl_to_descr loc t = * let name = get_val loc (snd (get_val loc t.tdNam)) in * let args = * List.map (fun (x, _) -> * match get_val loc x with * | Some y -> y * | None -> failwith "wildcard type parameters not supported" * ) * (get_val loc t.tdPrm) * in * let convert = * let convert_concrete typ = * let rec inner = function * | <:ctyp< ( $list:typs$ ) >> as typ -> Tuple (typ, List.map inner typs) * | <:ctyp< ' $a$ >> as typ -> Variable (typ, a) * | <:ctyp< $t$ $a$ >> as typ -> * (match inner t, inner a with * | _, Arbitrary _ -> Arbitrary typ * | Instance (_, targs, tname), a -> Instance (typ, targs@[a], tname) * | _ -> Arbitrary typ * ) * | <:ctyp< $q$ . $t$ >> as typ -> * (match inner q, inner t with * | Instance (_, [], q), Instance (_, [], t) -> Instance (typ, [], q@t) * | _ -> Arbitrary typ * ) * | (<:ctyp< $uid:n$ >> | <:ctyp< $lid:n$ >>) as typ -> Instance (typ, [], [n]) * | t -> Arbitrary t * in * let rec replace = function * | Tuple (t, typs) -> Tuple (t, List.map replace typs) * | Instance (t, args', qname) as orig when qname = [name] -> * (try * let args' = * List.map (function * | Variable (_, a) -> a * | _ -> invalid_arg "Not a variable" * ) * args' * in * if args' = args then Self (t, args, qname) else orig * with Invalid_argument "Not a variable" -> orig * ) * | x -> x * in * replace (inner typ) * in * function * | <:ctyp< [ $list:const$ ] >> | <:ctyp< $_$ == $priv:_$ [ $list:const$ ] >> -> * let const = List.map (fun (loc, name, args, d) -> * match d with * | None -> `Con (get_val loc name, List.map convert_concrete (get_val loc args)) * | _ -> oops loc "unsupported constructor declaration" * ) * const * in * `Vari const * * | <:ctyp< { $list:fields$ } >> | <:ctyp< $_$ == $priv:_$ { $list:fields$ } >> -> * let fields = List.map (fun (_, name, mut, typ) -> name, mut, convert_concrete typ) fields in * `Struct fields * * | <:ctyp< ( $list:typs$ ) >> -> `Tuple (List.map convert_concrete typs) * * | <:ctyp< [ = $list:variants$ ] >> -> * let wow () = oops loc "unsupported polymorphic variant type constructor declaration" in * let variants = * List.map (function * | <:poly_variant< $typ$ >> -> * (match convert_concrete typ with * | Arbitrary _ -> wow () * | typ -> `Type typ * ) * | <:poly_variant< ` $c$ >> -> `Con (c, []) * | <:poly_variant< ` $c$ of $list:typs$ >> -> * let typs = * List.flatten ( * List.map (function * | <:ctyp< ( $list:typs$ ) >> -> List.map convert_concrete typs * | typ -> [convert_concrete typ] * ) * typs * ) * in * `Con (c, typs) * | _ -> wow () * ) * variants * in * `Poly variants * * | typ -> * (match convert_concrete typ with * | Arbitrary _ -> oops loc "unsupported type" * | typ -> * `Vari [ * match typ with * | Variable (t, _) -> `Tuple [Tuple (<:ctyp< ($list:[t]$) >>, [typ])] * | _ -> `Type typ * ] * ) * in * (args, name, convert t.tdDef) *) module Migr = Migrate_parsetree.Convert(Migrate_parsetree.OCaml_current)(Migrate_parsetree.OCaml_408) open GTCommon let generate_str tdecls loc = let info = snd @@ List.hd @@ List.rev tdecls in let module H = Expander.Make(Camlp5Helpers) in (* Expander.notify "with annotations %s" (String.concat "," info); *) let generator_f si = H.str_type_decl_many_plugins ~loc si (List.map (fun s -> (s,Expander.Use []) ) info) in let out = let sis = <:str_item< type $list:(List.map fst tdecls)$ >> in let caml_ast = Ast2pt.implem "filename.here" [sis] in let () = assert (List.length caml_ast = 1) in match (List.hd caml_ast).pstr_desc with | Pstr_type (flg, tds) -> let copied = List.map Migr.copy_type_declaration tds in (* let copied = tds in *) generator_f [sis] (Recursive, copied) | _ -> failwith "type declaration expected" in <:str_item< declare $list:out$ end >> let generate_sig tdecls loc = let info = snd @@ List.hd @@ List.rev tdecls in (* Expander.notify "with annotations %s" (String.concat "," info); *) let module H = Expander.Make(Camlp5Helpers) in let generator_f si = H.sig_type_decl_many_plugins ~loc si (List.map (fun s -> (s,Expander.Use []) ) info) in let out = let ts = List.map fst tdecls in let sis = <:sig_item< type $list:ts$ >> in let caml_ast = Ast2pt.interf "asdf" [sis] in assert (List.length caml_ast = 1); match (List.hd caml_ast).psig_desc with | Psig_type (flg, tds) -> let copied = List.map Migr.copy_type_declaration tds in (* printf "copied length = %d\n%!" (List.length copied); *) (* let copied = td in *) generator_f [sis] (Recursive, copied) | _ -> assert false in <:sig_item< declare $list:out$ end >>