wneuper/isa: src/Pure/Syntax/syn

     1 (*  Title:      Pure/Syntax/syn_ext.ML

     2     Author:     Markus Wenzel and Carsten Clasohm, TU Muenchen

     4 Syntax extension (internal interface).

     5 *)

     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;

    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;

    88 structure SynExt: SYN_EXT =

    89 struct

    92 (** misc definitions **)

    94 val dddot_indexname = ("dddot", 0);

    95 val constrainC = "_constrain";

    98 (* syntactic categories *)

   100 val logic = "logic";

   101 val logicT = Type (logic, []);

   103 val args = "args";

   104 val cargs = "cargs";

   106 val typeT = Type ("type", []);

   108 val sprop = "#prop";

   109 val spropT = Type (sprop, []);

   111 val any = "any";

   112 val anyT = Type (any, []);

   116 (** datatype xprod **)

   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*)

   123 datatype xsymb =

   124   Delim of string |

   125   Argument of string * int |

   126   Space of string |

   127   Bg of int | Brk of int | En;

   129 fun is_delim (Delim _) = true

   130   | is_delim _ = false;

   132 fun is_terminal (Delim _) = true

   133   | is_terminal (Argument (s, _)) = Lexicon.is_terminal s

   134   | is_terminal _ = false;

   136 fun is_argument (Argument _) = true

   137   | is_argument _ = false;

   139 fun is_index (Argument ("index", _)) = true

   140   | is_index _ = false;

   142 val index = Argument ("index", 1000);

   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*)

   151 datatype xprod = XProd of string * xsymb list * string * int;

   153 val max_pri = 1000;   (*maximum legal priority*)

   154 val chain_pri = ~1;   (*dummy for chain productions*)

   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;

   163 (** datatype mfix **)

   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*)

   172 datatype mfix = Mfix of string * typ * string * int list * int;

   174 fun err_in_mfix msg (Mfix (sy, _, const, _, _)) =

   175   cat_error msg ("in mixfix annotation " ^ quote sy ^ " for " ^ quote const);

   178 (* typ_to_nonterm *)

   180 fun typ_to_nt _ (Type (c, _)) = c

   181   | typ_to_nt default _ = default;

   183 (*get nonterminal for rhs*)

   184 val typ_to_nonterm = typ_to_nt any;

   186 (*get nonterminal for lhs*)

   187 val typ_to_nonterm1 = typ_to_nt logic;

   190 (* read mixfix annotations *)

   192 local

   194 val is_meta = member (op =) ["(", ")", "/", "_", "\\<index>"];

   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);

   200 fun read_int ["0", "0"] = ~1

   201   | read_int cs = #1 (Library.read_int cs);

   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);

   213 val scan_symb =

   214   scan_sym >> SOME ||

   215   $$ "'" -- Scan.one Symbol.is_blank >> K NONE;

   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;

   220 fun unique_index xsymbs =

   221   if length (List.filter is_index xsymbs) <= 1 then xsymbs

   222   else error "Duplicate index arguments (\\<index>)";

   224 in

   226 val read_mfix = unique_index o read_symbs o Symbol.explode;

   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;

   231 val escape_mfix = implode o map (fn s => if is_meta s then "'" ^ s else s) o Symbol.explode;

   233 end;

   236 (* mfix_to_xprod *)

   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;

   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;

   251     fun check_blocks syms =

   252       if blocks_ok syms 0 then ()

   253       else err_in_mfix "Unbalanced block parentheses" mfix;

   256     val cons_fst = apfst o cons;

   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);

   270     fun rem_pri (Argument (s, _)) = Argument (s, chain_pri)

   271       | rem_pri sym = sym;

   273     fun logify_types copy_prod (a as (Argument (s, p))) =

   274           if s <> "prop" andalso is_logtype s then Argument (logic, p) else a

   275       | logify_types _ a = a;

   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;

   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;

   297     val (symbs, lhs) = add_args raw_symbs typ' pris;

   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 copy_prod) symbs;

   309     val xprod = XProd (lhs', symbs', const', pri);

   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);

   320   in (xprod', parse_rules) end;

   324 (** datatype syn_ext **)

   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};

   341 (* syn_ext *)

   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;

   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 = consts union_string 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;

   367 val syn_ext = syn_ext' true (K false);

   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 ([], []);

   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;

   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;

   384 (* token translations *)

   386 fun tokentrans_mode m trs = map (fn (s, f) => (m, s, f)) trs;

   388 val standard_token_classes =

   389   ["class", "tfree", "tvar", "free", "bound", "var", "numeral", "inner_string"];

   391 val standard_token_markers = map (fn s => "_" ^ s) standard_token_classes;

   394 (* pure_ext *)

   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   ([], []);

   409 end;

author	wenzelm
	Sun, 01 Mar 2009 16:48:06 +0100
changeset 30189	3633f560f4c3
parent 29565	3f8b24fcfbd6
child 32792	ec5292653aff
permissions	-rw-r--r--