src/Pure/Syntax/syn_ext.ML
author haftmann
Tue Oct 20 16:13:01 2009 +0200 (2009-10-20)
changeset 33037 b22e44496dc2
parent 32785 ec5292653aff
child 33038 8f9594c31de4
permissions -rw-r--r--
replaced old_style infixes eq_set, subset, union, inter and variants by generic versions
     1 (*  Title:      Pure/Syntax/syn_ext.ML
     2     Author:     Markus Wenzel and Carsten Clasohm, TU Muenchen
     3 
     4 Syntax extension (internal interface).
     5 *)
     6 
     7 signature SYN_EXT0 =
     8 sig
     9   val dddot_indexname: indexname
    10   val constrainC: string
    11   val typeT: typ
    12   val spropT: typ
    13   val max_pri: int
    14   val stamp_trfun: stamp -> string * 'a -> string * ('a * stamp)
    15   val mk_trfun: string * 'a -> string * ('a * stamp)
    16   val eq_trfun: ('a * stamp) * ('a * stamp) -> bool
    17   val tokentrans_mode:
    18     string -> (string * (Proof.context -> string -> Pretty.T)) list ->
    19     (string * string * (Proof.context -> string -> Pretty.T)) list
    20   val standard_token_classes: string list
    21 end;
    22 
    23 signature SYN_EXT =
    24 sig
    25   include SYN_EXT0
    26   val logic: string
    27   val args: string
    28   val cargs: string
    29   val any: string
    30   val sprop: string
    31   val typ_to_nonterm: typ -> string
    32   datatype xsymb =
    33     Delim of string |
    34     Argument of string * int |
    35     Space of string |
    36     Bg of int | Brk of int | En
    37   datatype xprod = XProd of string * xsymb list * string * int
    38   val chain_pri: int
    39   val delims_of: xprod list -> string list list
    40   datatype mfix = Mfix of string * typ * string * int list * int
    41   datatype syn_ext =
    42     SynExt of {
    43       xprods: xprod list,
    44       consts: string list,
    45       prmodes: string list,
    46       parse_ast_translation: (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list,
    47       parse_rules: (Ast.ast * Ast.ast) list,
    48       parse_translation: (string * ((Proof.context -> term list -> term) * stamp)) list,
    49       print_translation:
    50         (string * ((Proof.context -> bool -> typ -> term list -> term) * stamp)) list,
    51       print_rules: (Ast.ast * Ast.ast) list,
    52       print_ast_translation: (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list,
    53       token_translation: (string * string * (Proof.context -> string -> Pretty.T)) list}
    54   val mfix_delims: string -> string list
    55   val mfix_args: string -> int
    56   val escape_mfix: string -> string
    57   val syn_ext': bool -> (string -> bool) -> mfix list ->
    58     string list -> (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list *
    59     (string * ((Proof.context -> term list -> term) * stamp)) list *
    60     (string * ((Proof.context -> bool -> typ -> term list -> term) * stamp)) list *
    61     (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list
    62     -> (string * string * (Proof.context -> string -> Pretty.T)) list
    63     -> (Ast.ast * Ast.ast) list * (Ast.ast * Ast.ast) list -> syn_ext
    64   val syn_ext: mfix list -> string list ->
    65     (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list *
    66     (string * ((Proof.context -> term list -> term) * stamp)) list *
    67     (string * ((Proof.context -> bool -> typ -> term list -> term) * stamp)) list *
    68     (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list
    69     -> (string * string * (Proof.context -> string -> Pretty.T)) list
    70     -> (Ast.ast * Ast.ast) list * (Ast.ast * Ast.ast) list -> syn_ext
    71   val syn_ext_const_names: string list -> syn_ext
    72   val syn_ext_rules: (Ast.ast * Ast.ast) list * (Ast.ast * Ast.ast) list -> syn_ext
    73   val syn_ext_trfuns:
    74     (string * ((Ast.ast list -> Ast.ast) * stamp)) list *
    75     (string * ((term list -> term) * stamp)) list *
    76     (string * ((bool -> typ -> term list -> term) * stamp)) list *
    77     (string * ((Ast.ast list -> Ast.ast) * stamp)) list -> syn_ext
    78   val syn_ext_advanced_trfuns:
    79     (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list *
    80     (string * ((Proof.context -> term list -> term) * stamp)) list *
    81     (string * ((Proof.context -> bool -> typ -> term list -> term) * stamp)) list *
    82     (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list -> syn_ext
    83   val syn_ext_tokentrfuns: (string * string * (Proof.context -> string -> Pretty.T)) list -> syn_ext
    84   val standard_token_markers: string list
    85   val pure_ext: syn_ext
    86 end;
    87 
    88 structure SynExt: SYN_EXT =
    89 struct
    90 
    91 
    92 (** misc definitions **)
    93 
    94 val dddot_indexname = ("dddot", 0);
    95 val constrainC = "_constrain";
    96 
    97 
    98 (* syntactic categories *)
    99 
   100 val logic = "logic";
   101 val logicT = Type (logic, []);
   102 
   103 val args = "args";
   104 val cargs = "cargs";
   105 
   106 val typeT = Type ("type", []);
   107 
   108 val sprop = "#prop";
   109 val spropT = Type (sprop, []);
   110 
   111 val any = "any";
   112 val anyT = Type (any, []);
   113 
   114 
   115 
   116 (** datatype xprod **)
   117 
   118 (*Delim s: delimiter s
   119   Argument (s, p): nonterminal s requiring priority >= p, or valued token
   120   Space s: some white space for printing
   121   Bg, Brk, En: blocks and breaks for pretty printing*)
   122 
   123 datatype xsymb =
   124   Delim of string |
   125   Argument of string * int |
   126   Space of string |
   127   Bg of int | Brk of int | En;
   128 
   129 fun is_delim (Delim _) = true
   130   | is_delim _ = false;
   131 
   132 fun is_terminal (Delim _) = true
   133   | is_terminal (Argument (s, _)) = Lexicon.is_terminal s
   134   | is_terminal _ = false;
   135 
   136 fun is_argument (Argument _) = true
   137   | is_argument _ = false;
   138 
   139 fun is_index (Argument ("index", _)) = true
   140   | is_index _ = false;
   141 
   142 val index = Argument ("index", 1000);
   143 
   144 
   145 (*XProd (lhs, syms, c, p):
   146     lhs: name of nonterminal on the lhs of the production
   147     syms: list of symbols on the rhs of the production
   148     c: head of parse tree
   149     p: priority of this production*)
   150 
   151 datatype xprod = XProd of string * xsymb list * string * int;
   152 
   153 val max_pri = 1000;   (*maximum legal priority*)
   154 val chain_pri = ~1;   (*dummy for chain productions*)
   155 
   156 fun delims_of xprods =
   157   fold (fn XProd (_, xsymbs, _, _) =>
   158     fold (fn Delim s => insert (op =) s | _ => I) xsymbs) xprods []
   159   |> map Symbol.explode;
   160 
   161 
   162 
   163 (** datatype mfix **)
   164 
   165 (*Mfix (sy, ty, c, ps, p):
   166     sy: rhs of production as symbolic string
   167     ty: type description of production
   168     c: head of parse tree
   169     ps: priorities of arguments in sy
   170     p: priority of production*)
   171 
   172 datatype mfix = Mfix of string * typ * string * int list * int;
   173 
   174 fun err_in_mfix msg (Mfix (sy, _, const, _, _)) =
   175   cat_error msg ("in mixfix annotation " ^ quote sy ^ " for " ^ quote const);
   176 
   177 
   178 (* typ_to_nonterm *)
   179 
   180 fun typ_to_nt _ (Type (c, _)) = c
   181   | typ_to_nt default _ = default;
   182 
   183 (*get nonterminal for rhs*)
   184 val typ_to_nonterm = typ_to_nt any;
   185 
   186 (*get nonterminal for lhs*)
   187 val typ_to_nonterm1 = typ_to_nt logic;
   188 
   189 
   190 (* read mixfix annotations *)
   191 
   192 local
   193 
   194 val is_meta = member (op =) ["(", ")", "/", "_", "\\<index>"];
   195 
   196 val scan_delim_char =
   197   $$ "'" |-- Scan.one ((not o Symbol.is_blank) andf Symbol.is_regular) ||
   198   Scan.one ((not o is_meta) andf (not o Symbol.is_blank) andf Symbol.is_regular);
   199 
   200 fun read_int ["0", "0"] = ~1
   201   | read_int cs = #1 (Library.read_int cs);
   202 
   203 val scan_sym =
   204   $$ "_" >> K (Argument ("", 0)) ||
   205   $$ "\\<index>" >> K index ||
   206   $$ "(" |-- Scan.many Symbol.is_digit >> (Bg o read_int) ||
   207   $$ ")" >> K En ||
   208   $$ "/" -- $$ "/" >> K (Brk ~1) ||
   209   $$ "/" |-- Scan.many Symbol.is_blank >> (Brk o length) ||
   210   Scan.many1 Symbol.is_blank >> (Space o implode) ||
   211   Scan.repeat1 scan_delim_char >> (Delim o implode);
   212 
   213 val scan_symb =
   214   scan_sym >> SOME ||
   215   $$ "'" -- Scan.one Symbol.is_blank >> K NONE;
   216 
   217 val scan_symbs = Scan.repeat scan_symb --| Scan.ahead (~$$ "'");
   218 val read_symbs = map_filter I o the o Scan.read Symbol.stopper scan_symbs;
   219 
   220 fun unique_index xsymbs =
   221   if length (List.filter is_index xsymbs) <= 1 then xsymbs
   222   else error "Duplicate index arguments (\\<index>)";
   223 
   224 in
   225 
   226 val read_mfix = unique_index o read_symbs o Symbol.explode;
   227 
   228 fun mfix_delims sy = fold_rev (fn Delim s => cons s | _ => I) (read_mfix sy) [];
   229 val mfix_args = length o List.filter is_argument o read_mfix;
   230 
   231 val escape_mfix = implode o map (fn s => if is_meta s then "'" ^ s else s) o Symbol.explode;
   232 
   233 end;
   234 
   235 
   236 (* mfix_to_xprod *)
   237 
   238 fun mfix_to_xprod convert is_logtype (mfix as Mfix (sy, typ, const, pris, pri)) =
   239   let
   240     fun check_pri p =
   241       if p >= 0 andalso p <= max_pri then ()
   242       else err_in_mfix ("Precedence out of range: " ^ string_of_int p) mfix;
   243 
   244     fun blocks_ok [] 0 = true
   245       | blocks_ok [] _ = false
   246       | blocks_ok (Bg _ :: syms) n = blocks_ok syms (n + 1)
   247       | blocks_ok (En :: _) 0 = false
   248       | blocks_ok (En :: syms) n = blocks_ok syms (n - 1)
   249       | blocks_ok (_ :: syms) n = blocks_ok syms n;
   250 
   251     fun check_blocks syms =
   252       if blocks_ok syms 0 then ()
   253       else err_in_mfix "Unbalanced block parentheses" mfix;
   254 
   255 
   256     val cons_fst = apfst o cons;
   257 
   258     fun add_args [] ty [] = ([], typ_to_nonterm1 ty)
   259       | add_args [] _ _ = err_in_mfix "Too many precedences" mfix
   260       | add_args ((arg as Argument ("index", _)) :: syms) ty ps =
   261           cons_fst arg (add_args syms ty ps)
   262       | add_args (Argument _ :: syms) (Type ("fun", [ty, tys])) [] =
   263           cons_fst (Argument (typ_to_nonterm ty, 0)) (add_args syms tys [])
   264       | add_args (Argument _ :: syms) (Type ("fun", [ty, tys])) (p :: ps) =
   265           cons_fst (Argument (typ_to_nonterm ty, p)) (add_args syms tys ps)
   266       | add_args (Argument _ :: _) _ _ =
   267           err_in_mfix "More arguments than in corresponding type" mfix
   268       | add_args (sym :: syms) ty ps = cons_fst sym (add_args syms ty ps);
   269 
   270     fun rem_pri (Argument (s, _)) = Argument (s, chain_pri)
   271       | rem_pri sym = sym;
   272 
   273     fun logify_types (a as (Argument (s, p))) =
   274           if s <> "prop" andalso is_logtype s then Argument (logic, p) else a
   275       | logify_types a = a;
   276 
   277 
   278     val raw_symbs = read_mfix sy handle ERROR msg => err_in_mfix msg mfix;
   279     val args = List.filter (fn Argument _ => true | _ => false) raw_symbs;
   280     val (const', typ', parse_rules) =
   281       if not (exists is_index args) then (const, typ, [])
   282       else
   283         let
   284           val indexed_const = if const <> "" then "_indexed_" ^ const
   285             else err_in_mfix "Missing constant name for indexed syntax" mfix;
   286           val rangeT = Term.range_type typ handle Match =>
   287             err_in_mfix "Missing structure argument for indexed syntax" mfix;
   288 
   289           val xs = map Ast.Variable (Name.invent_list [] "xa" (length args - 1));
   290           val (xs1, xs2) = chop (find_index is_index args) xs;
   291           val i = Ast.Variable "i";
   292           val lhs = Ast.mk_appl (Ast.Constant indexed_const)
   293             (xs1 @ [Ast.mk_appl (Ast.Constant "_index") [i]] @ xs2);
   294           val rhs = Ast.mk_appl (Ast.Constant const) (i :: xs);
   295         in (indexed_const, rangeT, [(lhs, rhs)]) end;
   296 
   297     val (symbs, lhs) = add_args raw_symbs typ' pris;
   298 
   299     val copy_prod =
   300       (lhs = "prop" orelse lhs = "logic")
   301         andalso const <> ""
   302         andalso not (null symbs)
   303         andalso not (exists is_delim symbs);
   304     val lhs' =
   305       if convert andalso not copy_prod then
   306        (if lhs = "prop" then sprop else if is_logtype lhs then logic else lhs)
   307       else lhs;
   308     val symbs' = map logify_types symbs;
   309     val xprod = XProd (lhs', symbs', const', pri);
   310 
   311     val _ = (List.app check_pri pris; check_pri pri; check_blocks symbs');
   312     val xprod' =
   313       if Lexicon.is_terminal lhs' then err_in_mfix ("Illegal lhs: " ^ lhs') mfix
   314       else if const <> "" then xprod
   315       else if length (List.filter is_argument symbs') <> 1 then
   316         err_in_mfix "Copy production must have exactly one argument" mfix
   317       else if exists is_terminal symbs' then xprod
   318       else XProd (lhs', map rem_pri symbs', "", chain_pri);
   319 
   320   in (xprod', parse_rules) end;
   321 
   322 
   323 
   324 (** datatype syn_ext **)
   325 
   326 datatype syn_ext =
   327   SynExt of {
   328     xprods: xprod list,
   329     consts: string list,
   330     prmodes: string list,
   331     parse_ast_translation: (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list,
   332     parse_rules: (Ast.ast * Ast.ast) list,
   333     parse_translation: (string * ((Proof.context -> term list -> term) * stamp)) list,
   334     print_translation:
   335       (string * ((Proof.context -> bool -> typ -> term list -> term) * stamp)) list,
   336     print_rules: (Ast.ast * Ast.ast) list,
   337     print_ast_translation: (string * ((Proof.context -> Ast.ast list -> Ast.ast) * stamp)) list,
   338     token_translation: (string * string * (Proof.context -> string -> Pretty.T)) list};
   339 
   340 
   341 (* syn_ext *)
   342 
   343 fun syn_ext' convert is_logtype mfixes consts trfuns tokentrfuns (parse_rules, print_rules) =
   344   let
   345     val (parse_ast_translation, parse_translation, print_translation,
   346       print_ast_translation) = trfuns;
   347 
   348     val (xprods, parse_rules') = map (mfix_to_xprod convert is_logtype) mfixes
   349       |> split_list |> apsnd (rev o flat);
   350     val mfix_consts =
   351       distinct (op =) (map (fn Mfix x => #3 x) mfixes @ map (fn XProd x => #3 x) xprods);
   352   in
   353     SynExt {
   354       xprods = xprods,
   355       consts = gen_union (op =) (consts, mfix_consts),
   356       prmodes = distinct (op =) (map (fn (m, _, _) => m) tokentrfuns),
   357       parse_ast_translation = parse_ast_translation,
   358       parse_rules = parse_rules' @ parse_rules,
   359       parse_translation = parse_translation,
   360       print_translation = print_translation,
   361       print_rules = map swap parse_rules' @ print_rules,
   362       print_ast_translation = print_ast_translation,
   363       token_translation = tokentrfuns}
   364   end;
   365 
   366 
   367 val syn_ext = syn_ext' true (K false);
   368 
   369 fun syn_ext_const_names cs = syn_ext [] cs ([], [], [], []) [] ([], []);
   370 fun syn_ext_rules rules = syn_ext [] [] ([], [], [], []) [] rules;
   371 fun syn_ext_advanced_trfuns trfuns = syn_ext [] [] trfuns [] ([], []);
   372 fun syn_ext_tokentrfuns trfuns = syn_ext [] [] ([], [], [], []) trfuns ([], []);
   373 
   374 fun syn_ext_trfuns (atrs, trs, tr's, atr's) =
   375   let fun simple (name, (f, s)) = (name, (K f, s)) in
   376     syn_ext_advanced_trfuns (map simple atrs, map simple trs, map simple tr's, map simple atr's)
   377   end;
   378 
   379 fun stamp_trfun s (c, f) = (c, (f, s));
   380 fun mk_trfun tr = stamp_trfun (stamp ()) tr;
   381 fun eq_trfun ((_, s1: stamp), (_, s2)) = s1 = s2;
   382 
   383 
   384 (* token translations *)
   385 
   386 fun tokentrans_mode m trs = map (fn (s, f) => (m, s, f)) trs;
   387 
   388 val standard_token_classes =
   389   ["class", "tfree", "tvar", "free", "bound", "var", "numeral", "inner_string"];
   390 
   391 val standard_token_markers = map (fn s => "_" ^ s) standard_token_classes;
   392 
   393 
   394 (* pure_ext *)
   395 
   396 val pure_ext = syn_ext' false (K false)
   397   [Mfix ("_", spropT --> propT, "", [0], 0),
   398    Mfix ("_", logicT --> anyT, "", [0], 0),
   399    Mfix ("_", spropT --> anyT, "", [0], 0),
   400    Mfix ("'(_')", logicT --> logicT, "", [0], max_pri),
   401    Mfix ("'(_')", spropT --> spropT, "", [0], max_pri),
   402    Mfix ("_::_",  [logicT, typeT] ---> logicT, "_constrain", [4, 0], 3),
   403    Mfix ("_::_",  [spropT, typeT] ---> spropT, "_constrain", [4, 0], 3)]
   404   []
   405   ([], [], [], [])
   406   []
   407   ([], []);
   408 
   409 end;