author  wenzelm 
Thu, 13 Apr 2006 12:01:06 +0200  
changeset 19428  43bfe55759b0 
parent 19135  2de31ba562d7 
child 19482  9f11af8f7ef9 
permissions  rwrr 
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(* Title: Pure/theory.ML 
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ID: $Id$ 

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Author: Lawrence C Paulson and Markus Wenzel 

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Logical theory content: axioms, definitions, oracles. 
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*) 
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signature BASIC_THEORY = 
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sig 
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type theory 
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type theory_ref 
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val sign_of: theory > theory (*obsolete*) 
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val rep_theory: theory > 
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{axioms: term NameSpace.table, 
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defs: Defs.T, 
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oracles: ((theory * Object.T > term) * stamp) NameSpace.table} 
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val parents_of: theory > theory list 
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val ancestors_of: theory > theory list 
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type theory, theory_ref, exception THEORY and related operations imported from Context;
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val eq_thy: theory * theory > bool 
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val subthy: theory * theory > bool 
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val cert_axm: theory > string * term > string * term 
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val read_def_axm: theory * (indexname > typ option) * (indexname > sort option) > 
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string list > string * string > string * term 
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val read_axm: theory > string * string > string * term 
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val inferT_axm: theory > string * term > string * term 
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end 
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signature THEORY = 
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sig 
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include BASIC_THEORY 
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include SIGN_THEORY 
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val begin_theory: string > theory list > theory 
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val end_theory: theory > theory 

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val checkpoint: theory > theory 

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val copy: theory > theory 

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val init_data: theory > theory 
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val axiom_space: theory > NameSpace.T 
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val oracle_space: theory > NameSpace.T 
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val axioms_of: theory > (string * term) list 
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val all_axioms_of: theory > (string * term) list 

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val defs_of : theory > Defs.T 
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val self_ref: theory > theory_ref 
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val deref: theory_ref > theory 
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val merge: theory * theory > theory (*exception TERM*) 
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val merge_refs: theory_ref * theory_ref > theory_ref (*exception TERM*) 
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val requires: theory > string > string > unit 
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val assert_super: theory > theory > theory 
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val add_axioms: (bstring * string) list > theory > theory 
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val add_axioms_i: (bstring * term) list > theory > theory 

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val add_defs: bool > (bstring * string) list > theory > theory 
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val add_defs_i: bool > (bstring * term) list > theory > theory 

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val add_finals: bool > string list > theory > theory 
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val add_finals_i: bool > term list > theory > theory 
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val add_oracle: bstring * (theory * Object.T > term) > theory > theory 
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end 
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type theory, theory_ref, exception THEORY and related operations imported from Context;
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structure Theory: THEORY = 
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struct 
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(** type theory **) 
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(* context operations *) 
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type theory = Context.theory; 
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type theory_ref = Context.theory_ref; 
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val eq_thy = Context.eq_thy; 
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val subthy = Context.subthy; 
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val parents_of = Context.parents_of; 
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val ancestors_of = Context.ancestors_of; 
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val self_ref = Context.self_ref; 
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val deref = Context.deref; 
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val merge = Context.merge; 
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val merge_refs = Context.merge_refs; 
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val begin_theory = Sign.local_path oo Context.begin_thy Sign.pp; 
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val end_theory = Context.finish_thy; 

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val checkpoint = Context.checkpoint_thy; 

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val copy = Context.copy_thy; 

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(* signature operations *) 
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val sign_of = I; 
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structure SignTheory: SIGN_THEORY = Sign; 
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open SignTheory; 
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(** datatype thy **) 
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datatype thy = Thy of 
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{axioms: term NameSpace.table, 
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defs: Defs.T, 
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oracles: ((theory * Object.T > term) * stamp) NameSpace.table}; 
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fun make_thy (axioms, defs, oracles) = 
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Thy {axioms = axioms, defs = defs, oracles = oracles}; 
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fun err_dup_axms dups = error ("Duplicate axiom(s): " ^ commas_quote dups); 
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fun err_dup_oras dups = error ("Duplicate oracle(s): " ^ commas_quote dups); 
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structure ThyData = TheoryDataFun 
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(struct 
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val name = "Pure/theory"; 
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type T = thy; 
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val empty = make_thy (NameSpace.empty_table, Defs.empty, NameSpace.empty_table); 
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val copy = I; 
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fun extend (Thy {axioms, defs, oracles}) = make_thy (NameSpace.empty_table, defs, oracles); 
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fun merge pp (thy1, thy2) = 
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let 
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val Thy {axioms = _, defs = defs1, oracles = oracles1} = thy1; 
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val Thy {axioms = _, defs = defs2, oracles = oracles2} = thy2; 
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val axioms = NameSpace.empty_table; 
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val defs = Defs.merge pp (defs1, defs2); 
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val oracles = NameSpace.merge_tables (eq_snd (op =)) (oracles1, oracles2) 
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handle Symtab.DUPS dups => err_dup_oras dups; 
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in make_thy (axioms, defs, oracles) end; 
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fun print _ _ = (); 
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end); 
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val init_data = ThyData.init; 
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fun rep_theory thy = ThyData.get thy > (fn Thy args => args); 
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fun map_thy f = ThyData.map (fn (Thy {axioms, defs, oracles}) => 
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make_thy (f (axioms, defs, oracles))); 
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fun map_axioms f = map_thy (fn (axioms, defs, oracles) => (f axioms, defs, oracles)); 
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fun map_defs f = map_thy (fn (axioms, defs, oracles) => (axioms, f defs, oracles)); 
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fun map_oracles f = map_thy (fn (axioms, defs, oracles) => (axioms, defs, f oracles)); 
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(* basic operations *) 
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val axiom_space = #1 o #axioms o rep_theory; 
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val oracle_space = #1 o #oracles o rep_theory; 
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val axioms_of = Symtab.dest o #2 o #axioms o rep_theory; 
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fun all_axioms_of thy = List.concat (map axioms_of (thy :: ancestors_of thy)); 

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val defs_of = #defs o rep_theory; 
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fun requires thy name what = 
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if Context.exists_name name thy then () 
4846  153 
else error ("Require theory " ^ quote name ^ " as an ancestor for " ^ what); 
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fun assert_super thy1 thy2 = 
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if subthy (thy1, thy2) then thy2 

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else raise THEORY ("Not a super theory", [thy1, thy2]); 

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6311  160 

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(** add axioms **) 
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(* prepare axioms *) 
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fun err_in_axm msg name = 
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cat_error msg ("The error(s) above occurred in axiom " ^ quote name); 

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fun cert_axm thy (name, raw_tm) = 
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let 
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val (t, T, _) = Sign.certify_prop thy raw_tm 
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handle TYPE (msg, _, _) => error msg 
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 TERM (msg, _) => error msg; 
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in 
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Term.no_dummy_patterns t handle TERM (msg, _) => error msg; 
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(name, Sign.no_vars (Sign.pp thy) t) 
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end; 
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fun read_def_axm (thy, types, sorts) used (name, str) = 
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let 
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val ts = Syntax.read (Context.Theory thy) (Sign.is_logtype thy) (Sign.syn_of thy) propT str; 
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val (t, _) = 
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Sign.infer_types (Sign.pp thy) thy (Sign.consts_of thy) types sorts used true (ts, propT); 
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in cert_axm thy (name, t) end 
18678  184 
handle ERROR msg => err_in_axm msg name; 
1526  185 

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fun read_axm thy name_str = read_def_axm (thy, K NONE, K NONE) [] name_str; 
5057  187 

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fun inferT_axm thy (name, pre_tm) = 
16291  189 
let 
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val pp = Sign.pp thy; 
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val (t, _) = 
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Sign.infer_types pp thy (Sign.consts_of thy) (K NONE) (K NONE) [] true ([pre_tm], propT); 
18943  193 
in (name, Sign.no_vars pp t) end 
18678  194 
handle ERROR msg => err_in_axm msg name; 
1526  195 

196 

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(* add_axioms(_i) *) 
1526  198 

16291  199 
local 
200 

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fun gen_add_axioms prep_axm raw_axms thy = thy > map_axioms (fn axioms => 
1526  202 
let 
16991  203 
val axms = map (apsnd (Compress.term thy o Logic.varify) o prep_axm thy) raw_axms; 
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val axioms' = NameSpace.extend_table (Sign.naming_of thy) (axioms, axms) 
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handle Symtab.DUPS dups => err_dup_axms dups; 
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in axioms' end); 
1526  207 

16291  208 
in 
209 

210 
val add_axioms = gen_add_axioms read_axm; 

211 
val add_axioms_i = gen_add_axioms cert_axm; 

212 

213 
end; 

1526  214 

215 

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(** add constant definitions **) 
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17706  219 
fun prep_const thy (c, T) = (c, Compress.typ thy (Type.varifyT T)); 
220 

221 

16944  222 
(* check_overloading *) 
9280  223 

16944  224 
fun check_overloading thy overloaded (c, T) = 
16291  225 
let 
16944  226 
val declT = 
227 
(case Sign.const_constraint thy c of 

228 
NONE => error ("Undeclared constant " ^ quote c) 

229 
 SOME declT => declT); 

230 
val T' = Type.varifyT T; 

231 

232 
fun message txt = 

233 
[Pretty.block [Pretty.str "Specification of constant ", 

234 
Pretty.str c, Pretty.str " ::", Pretty.brk 1, Pretty.quote (Sign.pretty_typ thy T)], 

235 
Pretty.str txt] > Pretty.chunks > Pretty.string_of; 

16291  236 
in 
16944  237 
if Sign.typ_instance thy (declT, T') then () 
238 
else if Type.raw_instance (declT, T') then 

239 
error (Library.setmp show_sorts true 

240 
message "imposes additional sort constraints on the constant declaration") 

241 
else if overloaded then () 

242 
else warning (message "is strictly less general than the declared type"); 

243 
(c, T) 

9280  244 
end; 
245 

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16291  247 
(* check_def *) 
248 

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fun check_def thy overloaded (bname, tm) defs = 
16291  250 
let 
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val pp = Sign.pp thy; 
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fun prt_const (c, T) = 
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[Pretty.str c, Pretty.str " ::", Pretty.brk 1, 
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Pretty.quote (Pretty.typ pp (Type.freeze_type T))]; 
16883  255 

17706  256 
val name = Sign.full_name thy bname; 
18943  257 
val (lhs_const, rhs) = Sign.cert_def pp tm; 
16944  258 
val rhs_consts = fold_aterms (fn Const const => insert (op =) const  _ => I) rhs []; 
18943  259 
val _ = check_overloading thy overloaded lhs_const; 
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in 
17706  261 
defs > Defs.define (Sign.the_const_type thy) 
19135  262 
((true, Context.theory_name thy), name) (prep_const thy lhs_const) 
263 
(map (prep_const thy) rhs_consts) 

16883  264 
end 
18678  265 
handle ERROR msg => cat_error msg (Pretty.string_of (Pretty.block 
16883  266 
[Pretty.str ("The error(s) above occurred in definition " ^ quote bname ^ ":"), 
267 
Pretty.fbrk, Pretty.quote (Pretty.term (Sign.pp thy) tm)])); 

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(* add_defs(_i) *) 
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16291  272 
local 
9320  273 

16291  274 
fun gen_add_defs prep_axm overloaded raw_axms thy = 
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let val axms = map (prep_axm thy) raw_axms in 
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thy 
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> map_defs (fold (check_def thy overloaded) axms) 
9320  278 
> add_axioms_i axms 
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end; 
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16291  281 
in 
282 

283 
val add_defs_i = gen_add_defs cert_axm; 

284 
val add_defs = gen_add_defs read_axm; 

285 

286 
end; 

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(* add_finals(_i) *) 
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16291  291 
local 
292 

17706  293 
fun gen_add_finals prep_term overloaded args thy = 
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let 
17706  295 
fun const_of (Const const) = const 
296 
 const_of (Free _) = error "Attempt to finalize variable (or undeclared constant)" 

297 
 const_of _ = error "Attempt to finalize nonconstant term"; 

19428  298 
fun specify (c, T) = Defs.define (Sign.the_const_type thy) 
299 
((false, Context.theory_name thy), c ^ " axiom") (prep_const thy (c, T)) []; 

17706  300 
val finalize = specify o check_overloading thy overloaded o 
18943  301 
const_of o Sign.no_vars (Sign.pp thy) o prep_term thy; 
17706  302 
in thy > map_defs (fold finalize args) end; 
16291  303 

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in 
16291  305 

17706  306 
val add_finals = gen_add_finals Sign.read_term; 
307 
val add_finals_i = gen_add_finals Sign.cert_term; 

16291  308 

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end; 
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311 

3878  312 

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(** add oracle **) 
3814  314 

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fun add_oracle (bname, oracle) thy = thy > map_oracles (fn oracles => 
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NameSpace.extend_table (Sign.naming_of thy) (oracles, [(bname, (oracle, stamp ()))]) 
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handle Symtab.DUPS dups => err_dup_oras dups); 
3885  318 

1526  319 
end; 
320 

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structure BasicTheory: BASIC_THEORY = Theory; 
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open BasicTheory; 