src/Pure/Syntax/syntax.ML
author wenzelm
Thu Dec 07 17:58:54 2006 +0100 (2006-12-07)
changeset 21702 9300bec44e6a
parent 21536 f119c730f509
child 21731 360fa2caaf2f
permissions -rw-r--r--
added input_mode;
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(*  Title:      Pure/Syntax/syntax.ML
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    ID:         $Id$
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    Author:     Tobias Nipkow and Markus Wenzel, TU Muenchen
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Root of Isabelle's syntax module.
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*)
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signature BASIC_SYNTAX =
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sig
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  include AST0
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  include SYN_TRANS0
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  include MIXFIX0
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  include PRINTER0
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end;
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signature SYNTAX =
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sig
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  include AST1
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  include LEXICON0
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  include SYN_EXT0
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  include TYPE_EXT0
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  include SYN_TRANS1
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  include MIXFIX1
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  include PRINTER0
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  val extend_trtab: string -> (string * ('a * stamp)) list ->
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    ('a * stamp) Symtab.table -> ('a * stamp) Symtab.table
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  val merge_trtabs: string -> ('a * stamp) Symtab.table -> ('a * stamp) Symtab.table ->
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    ('a * stamp) Symtab.table
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  val merge_tr'tabs: ('a * stamp) list Symtab.table -> ('a * stamp) list Symtab.table
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    -> ('a * stamp) list Symtab.table
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  val extend_tr'tab: (string * ('a * stamp)) list ->
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    ('a * stamp) list Symtab.table -> ('a * stamp) list Symtab.table
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  datatype 'a trrule =
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    ParseRule of 'a * 'a |
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    PrintRule of 'a * 'a |
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    ParsePrintRule of 'a * 'a
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  type syntax
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  val eq_syntax: syntax * syntax -> bool
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  val is_keyword: syntax -> string -> bool
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  type mode
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  val default_mode: mode
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  val input_mode: mode
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  val extend_type_gram: (string * int * mixfix) list -> syntax -> syntax
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  val extend_const_gram: (string -> bool) ->
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    mode -> (string * typ * mixfix) list -> syntax -> syntax
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  val extend_consts: string list -> syntax -> syntax
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  val extend_trfuns:
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    (string * ((ast list -> ast) * stamp)) list *
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    (string * ((term list -> term) * stamp)) list *
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    (string * ((bool -> typ -> term list -> term) * stamp)) list *
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    (string * ((ast list -> ast) * stamp)) list -> syntax -> syntax
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  val extend_advanced_trfuns:
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    (string * ((Context.generic -> ast list -> ast) * stamp)) list *
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    (string * ((Context.generic -> term list -> term) * stamp)) list *
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    (string * ((Context.generic -> bool -> typ -> term list -> term) * stamp)) list *
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    (string * ((Context.generic -> ast list -> ast) * stamp)) list -> syntax -> syntax
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  val extend_tokentrfuns: (string * string * (string -> string * real)) list -> syntax -> syntax
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  val remove_const_gram: (string -> bool) ->
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    mode -> (string * typ * mixfix) list -> syntax -> syntax
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  val extend_trrules: Context.generic -> (string -> bool) -> syntax ->
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    (string * string) trrule list -> syntax -> syntax
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  val remove_trrules: Context.generic -> (string -> bool) -> syntax ->
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    (string * string) trrule list -> syntax -> syntax
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  val extend_trrules_i: ast trrule list -> syntax -> syntax
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  val remove_trrules_i: ast trrule list -> syntax -> syntax
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  val map_trrule: ('a -> 'b) -> 'a trrule -> 'b trrule
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  val merge_syntaxes: syntax -> syntax -> syntax
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  val basic_syn: syntax
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  val basic_nonterms: string list
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  val appl_syntax: (string * string * mixfix) list
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  val applC_syntax: (string * string * mixfix) list
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  val print_gram: syntax -> unit
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  val print_trans: syntax -> unit
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  val print_syntax: syntax -> unit
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  val read: Context.generic -> (string -> bool) -> syntax -> typ -> string -> term list
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  val read_typ: Context.generic -> syntax -> ((indexname * sort) list -> indexname -> sort) ->
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    (sort -> sort) -> string -> typ
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  val read_sort: Context.generic -> syntax -> string -> sort
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  val pretty_term: (string -> xstring) -> Context.generic -> syntax -> bool -> term -> Pretty.T
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  val pretty_typ: Context.generic -> syntax -> typ -> Pretty.T
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  val pretty_sort: Context.generic -> syntax -> sort -> Pretty.T
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  val ambiguity_level: int ref
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  val ambiguity_is_error: bool ref
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end;
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structure Syntax: SYNTAX =
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struct
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(** tables of translation functions **)
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(* parse (ast) translations *)
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fun lookup_tr tab c = Option.map fst (Symtab.lookup tab c);
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fun err_dup_trfuns name cs =
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  error ("More than one " ^ name ^ " for " ^ commas_quote cs);
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fun remove_trtab trfuns = fold (Symtab.remove SynExt.eq_trfun) trfuns;
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fun extend_trtab name trfuns tab = Symtab.extend (remove_trtab trfuns tab, trfuns)
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  handle Symtab.DUPS cs => err_dup_trfuns name cs;
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fun merge_trtabs name tab1 tab2 = Symtab.merge SynExt.eq_trfun (tab1, tab2)
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  handle Symtab.DUPS cs => err_dup_trfuns name cs;
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(* print (ast) translations *)
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fun lookup_tr' tab c = map fst (Symtab.lookup_list tab c);
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fun extend_tr'tab trfuns = fold_rev Symtab.update_list trfuns;
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fun remove_tr'tab trfuns = fold (Symtab.remove_list SynExt.eq_trfun) trfuns;
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fun merge_tr'tabs tab1 tab2 = Symtab.merge_list SynExt.eq_trfun (tab1, tab2);
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(** tables of token translation functions **)
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fun lookup_tokentr tabs modes =
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  let val trs = distinct (eq_fst (op =)) (maps (these o AList.lookup (op =) tabs) (modes @ [""]))
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  in fn c => Option.map fst (AList.lookup (op =) trs c) end;
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fun merge_tokentrtabs tabs1 tabs2 =
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  let
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    fun eq_tr ((c1, (_, s1)), (c2, (_, s2))) = c1 = c2 andalso s1 = s2;
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    fun name (s, _) = implode (tl (Symbol.explode s));
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    fun merge mode =
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      let
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        val trs1 = these (AList.lookup (op =) tabs1 mode);
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        val trs2 = these (AList.lookup (op =) tabs2 mode);
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        val trs = distinct eq_tr (trs1 @ trs2);
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      in
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        (case duplicates (eq_fst (op =)) trs of
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          [] => (mode, trs)
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        | dups => error ("More than one token translation function in mode " ^
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            quote mode ^ " for " ^ commas_quote (map name dups)))
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      end;
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  in map merge (distinct (op =) (map fst (tabs1 @ tabs2))) end;
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fun extend_tokentrtab tokentrs tabs =
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  let
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    fun ins_tokentr (m, c, f) =
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      AList.default (op =) (m, [])
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      #> AList.map_entry (op =) m (cons ("_" ^ c, (f, stamp ())));
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  in merge_tokentrtabs tabs (fold ins_tokentr tokentrs []) end;
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(** tables of translation rules **)
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type ruletab = (Ast.ast * Ast.ast) list Symtab.table;
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fun dest_ruletab tab = maps snd (Symtab.dest tab);
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(* empty, extend, merge ruletabs *)
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val extend_ruletab = fold_rev (fn r => Symtab.update_list (Ast.head_of_rule r, r));
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val remove_ruletab = fold (fn r => Symtab.remove_list (op =) (Ast.head_of_rule r, r));
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fun merge_ruletabs tab1 tab2 = Symtab.merge_list (op =) (tab1, tab2);
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(** datatype syntax **)
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datatype syntax =
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  Syntax of {
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    input: SynExt.xprod list,
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    lexicon: Scan.lexicon,
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    gram: Parser.gram,
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    consts: string list,
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    prmodes: string list,
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    parse_ast_trtab: ((Context.generic -> Ast.ast list -> Ast.ast) * stamp) Symtab.table,
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    parse_ruletab: ruletab,
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    parse_trtab: ((Context.generic -> term list -> term) * stamp) Symtab.table,
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    print_trtab: ((Context.generic -> bool -> typ -> term list -> term) * stamp) list Symtab.table,
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    print_ruletab: ruletab,
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    print_ast_trtab: ((Context.generic -> Ast.ast list -> Ast.ast) * stamp) list Symtab.table,
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    tokentrtab: (string * (string * ((string -> string * real) * stamp)) list) list,
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    prtabs: Printer.prtabs} * stamp;
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fun eq_syntax (Syntax (_, s1), Syntax (_, s2)) = s1 = s2;
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fun is_keyword (Syntax ({lexicon, ...}, _)) = Scan.is_literal lexicon o Symbol.explode;
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type mode = string * bool;
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val default_mode = ("", true);
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val input_mode = ("input", true);
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(* empty_syntax *)
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val empty_syntax = Syntax
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  ({input = [],
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    lexicon = Scan.empty_lexicon,
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    gram = Parser.empty_gram,
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    consts = [],
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    prmodes = [],
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    parse_ast_trtab = Symtab.empty,
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    parse_ruletab = Symtab.empty,
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    parse_trtab = Symtab.empty,
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    print_trtab = Symtab.empty,
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    print_ruletab = Symtab.empty,
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    print_ast_trtab = Symtab.empty,
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    tokentrtab = [],
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    prtabs = Printer.empty_prtabs}, stamp ());
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(* extend_syntax *)
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fun extend_syntax (mode, inout) syn_ext (Syntax (tabs, _)) =
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  let
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    val {input, lexicon, gram, consts = consts1, prmodes = prmodes1,
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      parse_ast_trtab, parse_ruletab, parse_trtab, print_trtab, print_ruletab,
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      print_ast_trtab, tokentrtab, prtabs} = tabs;
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    val SynExt.SynExt {xprods, consts = consts2, prmodes = prmodes2,
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      parse_ast_translation, parse_rules, parse_translation, print_translation, print_rules,
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      print_ast_translation, token_translation} = syn_ext;
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    fun if_inout xs = if inout then xs else [];
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  in
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    Syntax
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    ({input = if_inout xprods @ input,
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      lexicon = Scan.extend_lexicon lexicon (if_inout (SynExt.delims_of xprods)),
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      gram = Parser.extend_gram gram (if_inout xprods),
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      consts = Library.merge (op =) (consts1, filter_out NameSpace.is_qualified consts2),
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      prmodes = insert (op =) mode (Library.merge (op =) (prmodes1, prmodes2)),
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      parse_ast_trtab =
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        extend_trtab "parse ast translation" (if_inout parse_ast_translation) parse_ast_trtab,
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      parse_ruletab = extend_ruletab (if_inout parse_rules) parse_ruletab,
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      parse_trtab = extend_trtab "parse translation" (if_inout parse_translation) parse_trtab,
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      print_trtab = extend_tr'tab print_translation print_trtab,
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      print_ruletab = extend_ruletab print_rules print_ruletab,
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      print_ast_trtab = extend_tr'tab print_ast_translation print_ast_trtab,
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      tokentrtab = extend_tokentrtab token_translation tokentrtab,
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      prtabs = Printer.extend_prtabs mode xprods prtabs}, stamp ())
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  end;
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(* remove_syntax *)
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fun remove_syntax (mode, inout) syn_ext (Syntax (tabs, _)) =
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  let
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    val SynExt.SynExt {xprods, consts = _, prmodes = _,
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      parse_ast_translation, parse_rules, parse_translation, print_translation, print_rules,
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      print_ast_translation, token_translation = _} = syn_ext;
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    val {input, lexicon, gram, consts, prmodes,
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      parse_ast_trtab, parse_ruletab, parse_trtab, print_trtab, print_ruletab,
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      print_ast_trtab, tokentrtab, prtabs} = tabs;
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    val input' = if inout then subtract (op =) xprods input else input;
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    fun if_inout xs = if inout then xs else [];
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  in
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    Syntax
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    ({input = input',
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      lexicon = if inout then Scan.make_lexicon (SynExt.delims_of input') else lexicon,
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      gram = if inout then Parser.make_gram input' else gram,
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      consts = consts,
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      prmodes = prmodes,
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      parse_ast_trtab = remove_trtab (if_inout parse_ast_translation) parse_ast_trtab,
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      parse_ruletab = remove_ruletab (if_inout parse_rules) parse_ruletab,
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      parse_trtab = remove_trtab (if_inout parse_translation) parse_trtab,
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      print_trtab = remove_tr'tab print_translation print_trtab,
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      print_ruletab = remove_ruletab print_rules print_ruletab,
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      print_ast_trtab = remove_tr'tab print_ast_translation print_ast_trtab,
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      tokentrtab = tokentrtab,
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      prtabs = Printer.remove_prtabs mode xprods prtabs}, stamp ())
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  end;
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(* merge_syntaxes *)
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fun merge_syntaxes (Syntax (tabs1, _)) (Syntax (tabs2, _)) =
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  let
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    val {input = input1, lexicon = lexicon1, gram = gram1, consts = consts1,
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      prmodes = prmodes1, parse_ast_trtab = parse_ast_trtab1,
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      parse_ruletab = parse_ruletab1, parse_trtab = parse_trtab1,
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      print_trtab = print_trtab1, print_ruletab = print_ruletab1,
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      print_ast_trtab = print_ast_trtab1, tokentrtab = tokentrtab1, prtabs = prtabs1} = tabs1;
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    val {input = input2, lexicon = lexicon2, gram = gram2, consts = consts2,
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      prmodes = prmodes2, parse_ast_trtab = parse_ast_trtab2,
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      parse_ruletab = parse_ruletab2, parse_trtab = parse_trtab2,
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      print_trtab = print_trtab2, print_ruletab = print_ruletab2,
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      print_ast_trtab = print_ast_trtab2, tokentrtab = tokentrtab2, prtabs = prtabs2} = tabs2;
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  in
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    Syntax
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    ({input = Library.merge (op =) (input1, input2),
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      lexicon = Scan.merge_lexicons lexicon1 lexicon2,
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      gram = Parser.merge_grams gram1 gram2,
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      consts = sort_distinct string_ord (consts1 @ consts2),
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      prmodes = Library.merge (op =) (prmodes1, prmodes2),
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      parse_ast_trtab =
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        merge_trtabs "parse ast translation" parse_ast_trtab1 parse_ast_trtab2,
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      parse_ruletab = merge_ruletabs parse_ruletab1 parse_ruletab2,
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      parse_trtab = merge_trtabs "parse translation" parse_trtab1 parse_trtab2,
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      print_trtab = merge_tr'tabs print_trtab1 print_trtab2,
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      print_ruletab = merge_ruletabs print_ruletab1 print_ruletab2,
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      print_ast_trtab = merge_tr'tabs print_ast_trtab1 print_ast_trtab2,
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      tokentrtab = merge_tokentrtabs tokentrtab1 tokentrtab2,
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      prtabs = Printer.merge_prtabs prtabs1 prtabs2}, stamp ())
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  end;
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(* basic syntax *)
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val basic_syn =
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  empty_syntax
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  |> extend_syntax default_mode TypeExt.type_ext
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  |> extend_syntax default_mode SynExt.pure_ext;
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   311
val basic_nonterms =
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   312
  (Lexicon.terminals @ [SynExt.logic, "type", "types", "sort", "classes",
wenzelm@18720
   313
    SynExt.args, SynExt.cargs, "pttrn", "pttrns", "idt", "idts", "aprop",
wenzelm@18720
   314
    "asms", SynExt.any, SynExt.sprop, "num_const", "index", "struct"]);
wenzelm@18720
   315
wenzelm@18720
   316
val appl_syntax =
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 [("_appl", "[('b => 'a), args] => logic", Mixfix.Mixfix ("(1_/(1'(_')))", [1000, 0], 1000)),
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   318
  ("_appl", "[('b => 'a), args] => aprop", Mixfix.Mixfix ("(1_/(1'(_')))", [1000, 0], 1000))];
wenzelm@18720
   319
wenzelm@18720
   320
val applC_syntax =
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   321
 [("",       "'a => cargs",                  Mixfix.Delimfix "_"),
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   322
  ("_cargs", "['a, cargs] => cargs",         Mixfix.Mixfix ("_/ _", [1000, 1000], 1000)),
wenzelm@18720
   323
  ("_applC", "[('b => 'a), cargs] => logic", Mixfix.Mixfix ("(1_/ _)", [1000, 1000], 999)),
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   324
  ("_applC", "[('b => 'a), cargs] => aprop", Mixfix.Mixfix ("(1_/ _)", [1000, 1000], 999))];
wenzelm@18720
   325
clasohm@0
   326
wenzelm@4887
   327
wenzelm@15759
   328
(** print syntax **)
wenzelm@15759
   329
wenzelm@15759
   330
local
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   331
wenzelm@260
   332
fun pretty_strs_qs name strs =
berghofe@14598
   333
  Pretty.strs (name :: map Library.quote (sort_strings strs));
clasohm@0
   334
wenzelm@17079
   335
fun pretty_gram (Syntax (tabs, _)) =
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   336
  let
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   337
    val {lexicon, prmodes, gram, prtabs, ...} = tabs;
wenzelm@2913
   338
    val prmodes' = sort_strings (filter_out (equal "") prmodes);
clasohm@0
   339
  in
wenzelm@8720
   340
    [pretty_strs_qs "lexicon:" (Scan.dest_lexicon lexicon),
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   341
      Pretty.big_list "prods:" (Parser.pretty_gram gram),
wenzelm@8720
   342
      pretty_strs_qs "print modes:" prmodes']
clasohm@0
   343
  end;
clasohm@0
   344
wenzelm@17079
   345
fun pretty_trans (Syntax (tabs, _)) =
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   346
  let
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   347
    fun pretty_trtab name tab =
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   348
      pretty_strs_qs name (Symtab.keys tab);
clasohm@0
   349
wenzelm@260
   350
    fun pretty_ruletab name tab =
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   351
      Pretty.big_list name (map Ast.pretty_rule (dest_ruletab tab));
clasohm@0
   352
berghofe@14598
   353
    fun pretty_tokentr (mode, trs) = Pretty.strs (Library.quote mode ^ ":" :: map fst trs);
wenzelm@4703
   354
wenzelm@237
   355
    val {consts, parse_ast_trtab, parse_ruletab, parse_trtab, print_trtab,
wenzelm@4703
   356
      print_ruletab, print_ast_trtab, tokentrtab, ...} = tabs;
clasohm@0
   357
  in
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   358
    [pretty_strs_qs "consts:" consts,
wenzelm@8720
   359
      pretty_trtab "parse_ast_translation:" parse_ast_trtab,
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   360
      pretty_ruletab "parse_rules:" parse_ruletab,
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   361
      pretty_trtab "parse_translation:" parse_trtab,
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   362
      pretty_trtab "print_translation:" print_trtab,
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   363
      pretty_ruletab "print_rules:" print_ruletab,
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   364
      pretty_trtab "print_ast_translation:" print_ast_trtab,
wenzelm@8720
   365
      Pretty.big_list "token_translation:" (map pretty_tokentr tokentrtab)]
clasohm@0
   366
  end;
clasohm@0
   367
wenzelm@15759
   368
in
clasohm@0
   369
wenzelm@15759
   370
fun print_gram syn = Pretty.writeln (Pretty.chunks (pretty_gram syn));
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   371
fun print_trans syn = Pretty.writeln (Pretty.chunks (pretty_trans syn));
wenzelm@15759
   372
fun print_syntax syn = Pretty.writeln (Pretty.chunks (pretty_gram syn @ pretty_trans syn));
clasohm@0
   373
wenzelm@15759
   374
end;
clasohm@0
   375
clasohm@0
   376
clasohm@0
   377
wenzelm@237
   378
(** read **)
wenzelm@18
   379
wenzelm@260
   380
(* read_ast *)
wenzelm@260
   381
clasohm@882
   382
val ambiguity_level = ref 1;
wenzelm@15755
   383
val ambiguity_is_error = ref false
clasohm@882
   384
wenzelm@18857
   385
fun read_asts context is_logtype (Syntax (tabs, _)) xids root str =
wenzelm@260
   386
  let
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   387
    val {lexicon, gram, parse_ast_trtab, ...} = tabs;
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   388
    val root' = if root <> "prop" andalso is_logtype root then SynExt.logic else root;
wenzelm@4703
   389
    val chars = Symbol.explode str;
wenzelm@5692
   390
    val pts = Parser.parse gram root' (Lexicon.tokenize lexicon xids chars);
clasohm@330
   391
wenzelm@12292
   392
    fun show_pt pt =
wenzelm@18857
   393
      Pretty.string_of (Ast.pretty_ast (hd (SynTrans.pts_to_asts context (K NONE) [pt])));
wenzelm@260
   394
  in
wenzelm@16613
   395
    conditional (length pts > ! ambiguity_level) (fn () =>
wenzelm@16613
   396
      if ! ambiguity_is_error then error ("Ambiguous input " ^ quote str)
wenzelm@16661
   397
      else (warning ("Ambiguous input " ^ quote str ^ "\n" ^
wenzelm@16716
   398
          "produces " ^ string_of_int (length pts) ^ " parse trees.");
wenzelm@16669
   399
         List.app (warning o show_pt) pts));
wenzelm@18857
   400
    SynTrans.pts_to_asts context (lookup_tr parse_ast_trtab) pts
wenzelm@260
   401
  end;
wenzelm@260
   402
wenzelm@260
   403
wenzelm@237
   404
(* read *)
clasohm@0
   405
wenzelm@18857
   406
fun read context is_logtype (syn as Syntax (tabs, _)) ty str =
clasohm@0
   407
  let
wenzelm@237
   408
    val {parse_ruletab, parse_trtab, ...} = tabs;
wenzelm@18857
   409
    val asts = read_asts context is_logtype syn false (SynExt.typ_to_nonterm ty) str;
clasohm@0
   410
  in
wenzelm@18857
   411
    SynTrans.asts_to_terms context (lookup_tr parse_trtab)
wenzelm@18931
   412
      (map (Ast.normalize_ast (Symtab.lookup_list parse_ruletab)) asts)
clasohm@0
   413
  end;
clasohm@0
   414
clasohm@0
   415
wenzelm@237
   416
(* read types *)
clasohm@0
   417
wenzelm@18857
   418
fun read_typ context syn get_sort map_sort str =
wenzelm@18857
   419
  (case read context (K false) syn SynExt.typeT str of
wenzelm@12316
   420
    [t] => TypeExt.typ_of_term (get_sort (TypeExt.raw_term_sorts t)) map_sort t
wenzelm@8894
   421
  | _ => error "read_typ: ambiguous syntax");
wenzelm@144
   422
wenzelm@144
   423
wenzelm@8894
   424
(* read sorts *)
wenzelm@8894
   425
wenzelm@18857
   426
fun read_sort context syn str =
wenzelm@18857
   427
  (case read context (K false) syn TypeExt.sortT str of
wenzelm@8894
   428
    [t] => TypeExt.sort_of_term t
wenzelm@8894
   429
  | _ => error "read_sort: ambiguous syntax");
wenzelm@8894
   430
wenzelm@8894
   431
wenzelm@18
   432
wenzelm@1158
   433
(** prepare translation rules **)
wenzelm@1158
   434
wenzelm@1158
   435
datatype 'a trrule =
wenzelm@3526
   436
  ParseRule of 'a * 'a |
wenzelm@3526
   437
  PrintRule of 'a * 'a |
wenzelm@3526
   438
  ParsePrintRule of 'a * 'a;
wenzelm@888
   439
wenzelm@4618
   440
fun map_trrule f (ParseRule (x, y)) = ParseRule (f x, f y)
wenzelm@4618
   441
  | map_trrule f (PrintRule (x, y)) = PrintRule (f x, f y)
wenzelm@4618
   442
  | map_trrule f (ParsePrintRule (x, y)) = ParsePrintRule (f x, f y);
wenzelm@1158
   443
skalberg@15531
   444
fun parse_rule (ParseRule pats) = SOME pats
skalberg@15531
   445
  | parse_rule (PrintRule _) = NONE
skalberg@15531
   446
  | parse_rule (ParsePrintRule pats) = SOME pats;
wenzelm@1158
   447
skalberg@15531
   448
fun print_rule (ParseRule _) = NONE
skalberg@15531
   449
  | print_rule (PrintRule pats) = SOME (swap pats)
skalberg@15531
   450
  | print_rule (ParsePrintRule pats) = SOME (swap pats);
wenzelm@1158
   451
wenzelm@1158
   452
wenzelm@19262
   453
local
wenzelm@19262
   454
wenzelm@1158
   455
fun check_rule (rule as (lhs, rhs)) =
wenzelm@5692
   456
  (case Ast.rule_error rule of
skalberg@15531
   457
    SOME msg =>
wenzelm@1158
   458
      error ("Error in syntax translation rule: " ^ msg ^ "\n" ^
wenzelm@5692
   459
        Ast.str_of_ast lhs ^ "  ->  " ^ Ast.str_of_ast rhs)
skalberg@15531
   460
  | NONE => rule);
wenzelm@888
   461
wenzelm@888
   462
wenzelm@18857
   463
fun read_pattern context is_logtype syn (root, str) =
wenzelm@18
   464
  let
wenzelm@17079
   465
    val Syntax ({consts, ...}, _) = syn;
wenzelm@18
   466
wenzelm@5692
   467
    fun constify (ast as Ast.Constant _) = ast
wenzelm@5692
   468
      | constify (ast as Ast.Variable x) =
wenzelm@20664
   469
          if member (op =) consts x orelse NameSpace.is_qualified x then Ast.Constant x
wenzelm@3830
   470
          else ast
wenzelm@5692
   471
      | constify (Ast.Appl asts) = Ast.Appl (map constify asts);
wenzelm@18
   472
  in
wenzelm@18857
   473
    (case read_asts context is_logtype syn true root str of
wenzelm@888
   474
      [ast] => constify ast
wenzelm@888
   475
    | _ => error ("Syntactically ambiguous input: " ^ quote str))
wenzelm@18678
   476
  end handle ERROR msg =>
wenzelm@18678
   477
    cat_error msg ("The error(s) above occurred in translation pattern " ^
wenzelm@888
   478
      quote str);
clasohm@0
   479
wenzelm@1158
   480
fun prep_rules rd_pat raw_rules =
wenzelm@4618
   481
  let val rules = map (map_trrule rd_pat) raw_rules in
wenzelm@19482
   482
    (map check_rule (map_filter parse_rule rules),
wenzelm@19482
   483
      map check_rule (map_filter print_rule rules))
wenzelm@1158
   484
  end
wenzelm@18
   485
wenzelm@19262
   486
in
wenzelm@19262
   487
wenzelm@19262
   488
val cert_rules = prep_rules I;
wenzelm@19262
   489
wenzelm@19262
   490
fun read_rules context is_logtype syn =
wenzelm@19262
   491
  prep_rules (read_pattern context is_logtype syn);
wenzelm@19262
   492
wenzelm@19262
   493
end;
wenzelm@19262
   494
wenzelm@18
   495
wenzelm@18
   496
wenzelm@3779
   497
(** pretty terms, typs, sorts **)
wenzelm@18
   498
wenzelm@18857
   499
fun pretty_t t_to_ast prt_t context (syn as Syntax (tabs, _)) curried t =
clasohm@0
   500
  let
wenzelm@2700
   501
    val {print_trtab, print_ruletab, print_ast_trtab, tokentrtab, prtabs, ...} = tabs;
wenzelm@18857
   502
    val ast = t_to_ast context (lookup_tr' print_trtab) t;
clasohm@0
   503
  in
wenzelm@18857
   504
    prt_t context curried prtabs (lookup_tr' print_ast_trtab)
oheimb@6167
   505
      (lookup_tokentr tokentrtab (! print_mode))
wenzelm@18931
   506
      (Ast.normalize_ast (Symtab.lookup_list print_ruletab) ast)
clasohm@0
   507
  end;
clasohm@0
   508
wenzelm@19375
   509
val pretty_term = pretty_t Printer.term_to_ast o Printer.pretty_term_ast;
wenzelm@18857
   510
fun pretty_typ context syn = pretty_t Printer.typ_to_ast Printer.pretty_typ_ast context syn false;
wenzelm@18857
   511
fun pretty_sort context syn = pretty_t Printer.sort_to_ast Printer.pretty_typ_ast context syn false;
clasohm@0
   512
clasohm@0
   513
clasohm@0
   514
wenzelm@19262
   515
(** modify syntax **)
wenzelm@383
   516
wenzelm@14904
   517
fun ext_syntax' f is_logtype prmode decls = extend_syntax prmode (f is_logtype decls);
wenzelm@14904
   518
fun ext_syntax f = ext_syntax' (K f) (K false) default_mode;
wenzelm@383
   519
wenzelm@16613
   520
val extend_type_gram       = ext_syntax Mixfix.syn_ext_types;
wenzelm@16613
   521
val extend_const_gram      = ext_syntax' Mixfix.syn_ext_consts;
wenzelm@16613
   522
val extend_consts          = ext_syntax SynExt.syn_ext_const_names;
wenzelm@16613
   523
val extend_trfuns          = ext_syntax SynExt.syn_ext_trfuns;
wenzelm@16613
   524
val extend_advanced_trfuns = ext_syntax SynExt.syn_ext_advanced_trfuns;
wenzelm@16613
   525
val extend_tokentrfuns     = ext_syntax SynExt.syn_ext_tokentrfuns;
wenzelm@5692
   526
wenzelm@15755
   527
fun remove_const_gram is_logtype prmode decls =
wenzelm@15755
   528
  remove_syntax prmode (Mixfix.syn_ext_consts is_logtype decls);
wenzelm@15755
   529
wenzelm@19262
   530
fun extend_trrules context is_logtype syn =
wenzelm@19262
   531
  ext_syntax SynExt.syn_ext_rules o read_rules context is_logtype syn;
wenzelm@19262
   532
wenzelm@19262
   533
fun remove_trrules context is_logtype syn =
wenzelm@19262
   534
  remove_syntax default_mode o SynExt.syn_ext_rules o read_rules context is_logtype syn;
wenzelm@19262
   535
wenzelm@19262
   536
val extend_trrules_i = ext_syntax SynExt.syn_ext_rules o cert_rules;
wenzelm@19262
   537
val remove_trrules_i = remove_syntax default_mode o SynExt.syn_ext_rules o cert_rules;
wenzelm@5692
   538
wenzelm@5692
   539
wenzelm@15833
   540
(*export parts of internal Syntax structures*)
wenzelm@15833
   541
open Lexicon SynExt Ast Parser TypeExt SynTrans Mixfix Printer;
wenzelm@2366
   542
clasohm@0
   543
end;
wenzelm@5692
   544
wenzelm@5692
   545
structure BasicSyntax: BASIC_SYNTAX = Syntax;
wenzelm@5692
   546
open BasicSyntax;