author  wenzelm 
Fri, 24 Oct 1997 17:12:35 +0200  
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parent 3936  1954255c29ef 
child 4126  c41846a38e20 
permissions  rwrr 
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(* Title: Pure/display.ML 
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ID: $Id$ 
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Author: Lawrence C Paulson, Cambridge University Computer Laboratory 
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Copyright 1993 University of Cambridge 
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Printing of theories, theorems, etc. 
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*) 
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signature DISPLAY = 
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sig 
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val pprint_cterm : cterm > pprint_args > unit 
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val pprint_ctyp : ctyp > pprint_args > unit 
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val pprint_theory : theory > pprint_args > unit 
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val pprint_thm : thm > pprint_args > unit 
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val pretty_cterm : cterm > Pretty.T 
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val pretty_thm : thm > Pretty.T 
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val print_cterm : cterm > unit 
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val print_ctyp : ctyp > unit 
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val show_consts : bool ref 
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val print_goals : int > thm > unit 
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val print_syntax : theory > unit 
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val print_theory : theory > unit 
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val print_data : theory > string > unit 
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val print_thm : thm > unit 
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val prth : thm > thm 
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val prthq : thm Sequence.seq > thm Sequence.seq 
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val prths : thm list > thm list 
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val show_hyps : bool ref 
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val string_of_cterm : cterm > string 
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val string_of_ctyp : ctyp > string 
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val string_of_thm : thm > string 
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end; 
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structure Display : DISPLAY = 
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struct 
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(*If false, hypotheses are printed as dots*) 
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val show_hyps = ref true; 
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fun pretty_thm th = 
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let 
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val {sign, hyps, prop, ...} = rep_thm th; 
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val xshyps = extra_shyps th; 
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val hlen = length xshyps + length hyps; 
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val hsymbs = 
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if hlen = 0 then [] 
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else if ! show_hyps then 
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[Pretty.brk 2, Pretty.list "[" "]" 
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(map (Sign.pretty_term sign) hyps @ 
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map (Sign.pretty_sort sign) xshyps)] 

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else 
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[Pretty.brk 2, Pretty.str ("[" ^ implode (replicate hlen ".") ^ "]")]; 
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in 
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Pretty.block (Sign.pretty_term sign prop :: hsymbs) 
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end; 
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val string_of_thm = Pretty.string_of o pretty_thm; 
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val pprint_thm = Pretty.pprint o Pretty.quote o pretty_thm; 
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(** Toplevel commands for printing theorems **) 
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val print_thm = writeln o string_of_thm; 
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fun prth th = (print_thm th; th); 
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(*Print and return a sequence of theorems, separated by blank lines. *) 
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fun prthq thseq = 
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(Sequence.prints (fn _ => print_thm) 100000 thseq; thseq); 
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(*Print and return a list of theorems, separated by blank lines. *) 
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fun prths ths = (print_list_ln print_thm ths; ths); 
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(* other printing commands *) 
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fun pprint_ctyp cT = 
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let val {sign, T} = rep_ctyp cT in Sign.pprint_typ sign T end; 
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fun string_of_ctyp cT = 
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let val {sign, T} = rep_ctyp cT in Sign.string_of_typ sign T end; 
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val print_ctyp = writeln o string_of_ctyp; 
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fun pretty_cterm ct = 
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let val {sign, t, ...} = rep_cterm ct in Sign.pretty_term sign t end; 

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fun pprint_cterm ct = 
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let val {sign, t, ...} = rep_cterm ct in Sign.pprint_term sign t end; 
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fun string_of_cterm ct = 
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let val {sign, t, ...} = rep_cterm ct in Sign.string_of_term sign t end; 
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val print_cterm = writeln o string_of_cterm; 
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(* print theory *) 
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val pprint_theory = Sign.pprint_sg o sign_of; 
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val print_syntax = Syntax.print_syntax o syn_of; 
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val print_data = Sign.print_data o sign_of; 
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fun print_thy thy = 
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let 
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val {sign, axioms, oracles, ...} = rep_theory thy; 
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val axioms = Symtab.dest axioms; 

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val oras = map fst (Symtab.dest oracles); 
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fun prt_axm (a, t) = Pretty.block 
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[Pretty.str (Sign.cond_extern sign Theory.axiomK a ^ ":"), Pretty.brk 1, 
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Pretty.quote (Sign.pretty_term sign t)]; 
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in 
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Pretty.writeln (Pretty.big_list "axioms:" (map prt_axm axioms)); 
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Pretty.writeln (Pretty.strs ("oracles:" :: oras)); 

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print_data thy "theorems" 

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end; 
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fun print_theory thy = (Sign.print_sg (sign_of thy); print_thy thy); 
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(** Print thm A1,...,An/B in "goal style"  premises as numbered subgoals **) 
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(*show consts in case of showing types?*) 
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val show_consts = ref false; 
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local 
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(* utils *) 
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fun ins_entry (x, y) [] = [(x, [y])] 
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 ins_entry (x, y) ((pair as (x', ys')) :: pairs) = 
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if x = x' then (x', y ins ys') :: pairs 
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else pair :: ins_entry (x, y) pairs; 
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fun add_consts (Const (c, T), env) = ins_entry (T, (c, T)) env 
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 add_consts (t $ u, env) = add_consts (u, add_consts (t, env)) 
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 add_consts (Abs (_, _, t), env) = add_consts (t, env) 
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 add_consts (_, env) = env; 
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fun add_vars (Free (x, T), env) = ins_entry (T, (x, ~1)) env 
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 add_vars (Var (xi, T), env) = ins_entry (T, xi) env 
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 add_vars (Abs (_, _, t), env) = add_vars (t, env) 
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 add_vars (t $ u, env) = add_vars (u, add_vars (t, env)) 
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 add_vars (_, env) = env; 
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fun add_varsT (Type (_, Ts), env) = foldr add_varsT (Ts, env) 
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 add_varsT (TFree (x, S), env) = ins_entry (S, (x, ~1)) env 
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 add_varsT (TVar (xi, S), env) = ins_entry (S, xi) env; 
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fun less_idx ((x, i):indexname, (y, j):indexname) = 
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x < y orelse x = y andalso i < j; 
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fun sort_idxs l = map (apsnd (sort less_idx)) l; 
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fun sort_cnsts l = map (apsnd (sort_wrt fst)) l; 
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(* prepare atoms *) 
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fun consts_of t = sort_cnsts (add_consts (t, [])); 
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fun vars_of t = sort_idxs (add_vars (t, [])); 
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fun varsT_of t = rev (sort_idxs (it_term_types add_varsT (t, []))); 
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in 
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(* print_goals *) 
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fun print_goals maxgoals state = 
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let 
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val {sign, ...} = rep_thm state; 
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val prt_term = Sign.pretty_term sign; 
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val prt_typ = Sign.pretty_typ sign; 
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val prt_sort = Sign.pretty_sort sign; 
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fun prt_atoms prt prtT (X, xs) = Pretty.block 
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[Pretty.block (Pretty.commas (map prt xs)), Pretty.str " ::", 
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Pretty.brk 1, prtT X]; 
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fun prt_var (x, ~1) = prt_term (Syntax.free x) 
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 prt_var xi = prt_term (Syntax.var xi); 
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fun prt_varT (x, ~1) = prt_typ (TFree (x, [])) 
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 prt_varT xi = prt_typ (TVar (xi, [])); 
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val prt_consts = prt_atoms (prt_term o Const) prt_typ; 
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val prt_vars = prt_atoms prt_var prt_typ; 
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val prt_varsT = prt_atoms prt_varT prt_sort; 
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fun print_list _ _ [] = () 
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 print_list name prt lst = (writeln ""; 
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Pretty.writeln (Pretty.big_list name (map prt lst))); 
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fun print_subgoals (_, []) = () 
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 print_subgoals (n, A :: As) = (Pretty.writeln (Pretty.blk (0, 
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[Pretty.str (" " ^ string_of_int n ^ ". "), prt_term A])); 
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print_subgoals (n + 1, As)); 
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val print_ffpairs = 
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print_list "Flexflex pairs:" (prt_term o Logic.mk_flexpair); 
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val print_consts = print_list "Constants:" prt_consts o consts_of; 
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val print_vars = print_list "Variables:" prt_vars o vars_of; 
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val print_varsT = print_list "Type variables:" prt_varsT o varsT_of; 
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val {prop, ...} = rep_thm state; 
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val (tpairs, As, B) = Logic.strip_horn prop; 
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val ngoals = length As; 
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fun print_gs (types, sorts) = 
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(Pretty.writeln (prt_term B); 
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if ngoals = 0 then writeln "No subgoals!" 
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else if ngoals > maxgoals then 
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(print_subgoals (1, take (maxgoals, As)); 
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writeln ("A total of " ^ string_of_int ngoals ^ " subgoals...")) 
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else print_subgoals (1, As); 
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print_ffpairs tpairs; 
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if types andalso ! show_consts then print_consts prop else (); 
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if types then print_vars prop else (); 
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if sorts then print_varsT prop else ()); 
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in 
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setmp show_no_free_types true 
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(setmp show_types (! show_types orelse ! show_sorts) 
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(setmp show_sorts false print_gs)) 
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(! show_types orelse ! show_sorts, ! show_sorts) 
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end; 
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end; 
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end; 
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open Display; 