src/Pure/Isar/term_style.ML
author schirmer
Wed Sep 14 23:04:59 2005 +0200 (2005-09-14 ago)
changeset 17392 a639d580b34b
parent 17221 6cd180204582
child 17412 e26cb20ef0cc
permissions -rw-r--r--
added prem10 - prem19
     1 (*  Title:      Pure/Isar/term_style.ML
     2     ID:         $Id$
     3     Author:     Florian Haftmann, TU Muenchen
     4 
     5 Styles for terms, to use with the "term_style" and "thm_style"
     6 antiquotations.
     7 *)
     8 
     9 signature TERM_STYLE =
    10 sig
    11   val the_style: theory -> string -> (Proof.context -> term -> term)
    12   val add_style: string -> (Proof.context -> term -> term) -> theory -> theory
    13   val print_styles: theory -> unit
    14 end;
    15 
    16 structure TermStyle: TERM_STYLE =
    17 struct
    18 
    19 (* style data *)
    20 
    21 fun err_dup_styles names =
    22   error ("Duplicate declaration of antiquote style(s): " ^ commas_quote names);
    23 
    24 structure StyleData = TheoryDataFun
    25 (struct
    26   val name = "Isar/antiquote_style";
    27   type T = ((Proof.context -> term -> term) * stamp) Symtab.table;
    28   val empty = Symtab.empty;
    29   val copy = I;
    30   val extend = I;
    31   fun merge _ tabs = Symtab.merge eq_snd tabs
    32     handle Symtab.DUPS dups => err_dup_styles dups;
    33   fun print _ tab = Pretty.writeln (Pretty.strs ("antiquote styles:" :: Symtab.keys tab));
    34 end);
    35 
    36 val _ = Context.add_setup [StyleData.init];
    37 val print_styles = StyleData.print;
    38 
    39 
    40 (* accessors *)
    41 
    42 fun the_style thy name =
    43   (case Symtab.curried_lookup (StyleData.get thy) name of
    44     NONE => error ("Unknown antiquote style: " ^ quote name)
    45   | SOME (style, _) => style);
    46 
    47 fun add_style name style thy =
    48   StyleData.map (Symtab.curried_update_new (name, (style, stamp ()))) thy
    49     handle Symtab.DUP _ => err_dup_styles [name];
    50 
    51 
    52 (* predefined styles *)
    53 
    54 fun style_binargs ctxt t =
    55   let
    56     val concl = ObjectLogic.drop_judgment (ProofContext.theory_of ctxt)
    57       (Logic.strip_imp_concl t)
    58   in
    59     case concl of (_ $ l $ r) => (l, r)
    60     | _ => error ("Binary operator expected in term: " ^ ProofContext.string_of_term ctxt concl)
    61   end;
    62 
    63 fun style_parm_premise i ctxt t =
    64   let val prems = Logic.strip_imp_prems t in
    65     if i <= length prems then List.nth (prems, i - 1)
    66     else error ("Not enough premises for prem" ^ string_of_int i ^
    67       " in propositon: " ^ ProofContext.string_of_term ctxt t)
    68   end;
    69 
    70 val _ = Context.add_setup
    71  [add_style "lhs" (fst oo style_binargs),
    72   add_style "rhs" (snd oo style_binargs),
    73   add_style "prem1" (style_parm_premise 1),
    74   add_style "prem2" (style_parm_premise 2),
    75   add_style "prem3" (style_parm_premise 3),
    76   add_style "prem4" (style_parm_premise 4),
    77   add_style "prem5" (style_parm_premise 5),
    78   add_style "prem6" (style_parm_premise 6),
    79   add_style "prem7" (style_parm_premise 7),
    80   add_style "prem8" (style_parm_premise 8),
    81   add_style "prem9" (style_parm_premise 9),
    82   add_style "prem10" (style_parm_premise 10),
    83   add_style "prem11" (style_parm_premise 11),
    84   add_style "prem12" (style_parm_premise 12),
    85   add_style "prem13" (style_parm_premise 13),
    86   add_style "prem14" (style_parm_premise 14),
    87   add_style "prem15" (style_parm_premise 15),
    88   add_style "prem16" (style_parm_premise 16),
    89   add_style "prem17" (style_parm_premise 17),
    90   add_style "prem18" (style_parm_premise 18),
    91   add_style "prem19" (style_parm_premise 19),
    92   add_style "concl" (K Logic.strip_imp_concl)];
    93 end;