author  wenzelm 
Thu, 05 Apr 2007 00:30:31 +0200  
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permissions  rwrr 
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(* Title: Pure/context.ML 
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ID: $Id$ 

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Author: Markus Wenzel, TU Muenchen 

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Generic theory contexts with unique identity, arbitrarily typed data, 
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development graph and history support. Generic proof contexts with 
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arbitrarily typed data. 
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*) 
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signature BASIC_CONTEXT = 

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sig 

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type theory 
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type theory_ref 
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exception THEORY of string * theory list 
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end; 
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signature CONTEXT = 

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sig 

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include BASIC_CONTEXT 

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(*theory context*) 
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val theory_name: theory > string 
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val parents_of: theory > theory list 
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val ancestors_of: theory > theory list 
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val is_stale: theory > bool 
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val ProtoPureN: string 
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val PureN: string 
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val CPureN: string 
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val draftN: string 
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val exists_name: string > theory > bool 
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val names_of: theory > string list 
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val pretty_thy: theory > Pretty.T 
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val string_of_thy: theory > string 
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val pprint_thy: theory > pprint_args > unit 
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val pretty_abbrev_thy: theory > Pretty.T 
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val str_of_thy: theory > string 
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val check_thy: theory > theory 
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val eq_thy: theory * theory > bool 
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val thy_ord: theory * theory > order 
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val subthy: theory * theory > bool 
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val joinable: theory * theory > bool 
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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 self_ref: theory > theory_ref 
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val deref: theory_ref > theory 
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val copy_thy: theory > theory 
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val checkpoint_thy: theory > theory 
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val finish_thy: theory > theory 
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val theory_data_of: theory > string list 
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val pre_pure_thy: theory 
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val begin_thy: (theory > Pretty.pp) > string > theory list > theory 
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(*proof context*) 
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type proof 

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val theory_of_proof: proof > theory 

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val transfer_proof: theory > proof > proof 
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val init_proof: theory > proof 
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val proof_data_of: theory > string list 

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(*generic context*) 

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datatype generic = Theory of theory  Proof of proof 
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val cases: (theory > 'a) > (proof > 'a) > generic > 'a 

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val mapping: (theory > theory) > (proof > proof) > generic > generic 
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val mapping_result: (theory > 'a * theory) > (proof > 'a * proof) > generic > 'a * generic 
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val the_theory: generic > theory 
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val the_proof: generic > proof 

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val map_theory: (theory > theory) > generic > generic 
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val map_proof: (proof > proof) > generic > generic 

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val theory_map: (generic > generic) > theory > theory 

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val proof_map: (generic > generic) > proof > proof 

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val theory_of: generic > theory (*total*) 
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val proof_of: generic > proof (*total*) 

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(*delayed setup*) 
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val add_setup: (theory > theory) > unit 
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val setup: unit > theory > theory 
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end; 
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signature PRIVATE_CONTEXT = 
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sig 
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include CONTEXT 
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structure TheoryData: 
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sig 
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val declare: string > Object.T > (Object.T > Object.T) > (Object.T > Object.T) > 
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(Pretty.pp > Object.T * Object.T > Object.T) > serial 
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val init: serial > theory > theory 
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val get: serial > (Object.T > 'a) > theory > 'a 
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val put: serial > ('a > Object.T) > 'a > theory > theory 
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end 
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structure ProofData: 
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sig 

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val declare: string > (theory > Object.T) > serial 

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val init: serial > theory > theory 

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val get: serial > (Object.T > 'a) > proof > 'a 

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val put: serial > ('a > Object.T) > 'a > proof > proof 

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end 

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end; 
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structure Context: PRIVATE_CONTEXT = 
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struct 
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(*** theory context ***) 
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(** theory data **) 
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(* data kinds and access methods *) 
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(*private copy avoids potential conflict of table exceptions*) 
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structure Datatab = TableFun(type key = int val ord = int_ord); 
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local 
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type kind = 
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{name: string, 
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empty: Object.T, 
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copy: Object.T > Object.T, 
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extend: Object.T > Object.T, 
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merge: Pretty.pp > Object.T * Object.T > Object.T}; 
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val kinds = ref (Datatab.empty: kind Datatab.table); 
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fun invoke meth_name meth_fn k = 
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(case Datatab.lookup (! kinds) k of 
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SOME kind => meth_fn kind > transform_failure (fn exn => 
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EXCEPTION (exn, "Theory data method " ^ #name kind ^ "." ^ meth_name ^ " failed")) 
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 NONE => sys_error ("Invalid theory data identifier " ^ string_of_int k)); 
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in 
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fun invoke_name k = invoke "name" (K o #name) k (); 
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fun invoke_empty k = invoke "empty" (K o #empty) k (); 
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val invoke_copy = invoke "copy" #copy; 
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val invoke_extend = invoke "extend" #extend; 
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fun invoke_merge pp = invoke "merge" (fn kind => #merge kind pp); 
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fun declare_theory_data name empty copy extend merge = 
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let 
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val k = serial (); 
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val kind = {name = name, empty = empty, copy = copy, extend = extend, merge = merge}; 
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val _ = 
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if Datatab.exists (equal name o #name o #2) (! kinds) then 

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warning ("Duplicate declaration of theory data " ^ quote name) 

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else (); 

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val _ = change kinds (Datatab.update (k, kind)); 
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in k end; 
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val copy_data = Datatab.map' invoke_copy; 
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val extend_data = Datatab.map' invoke_extend; 
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fun merge_data pp = Datatab.join (invoke_merge pp) o pairself extend_data; 
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end; 
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(** datatype theory **) 
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datatype theory = 
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Theory of 
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(*identity*) 
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{self: theory ref option, (*dynamic self reference  follows theory changes*) 
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id: serial * string, (*identifier of this theory*) 
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ids: string Inttab.table, (*identifiers of ancestors*) 
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iids: string Inttab.table} * (*identifiers of intermediate checkpoints*) 
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(*data*) 
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{theory: Object.T Datatab.table, (*theory data record*) 
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proof: unit Datatab.table} * (*proof data kinds*) 
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(*ancestry*) 
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{parents: theory list, (*immediate predecessors*) 
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ancestors: theory list} * (*all predecessors*) 
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(*history*) 
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{name: string, (*prospective name of finished theory*) 
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version: int, (*checkpoint counter*) 
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intermediates: theory list}; (*intermediate checkpoints*) 
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exception THEORY of string * theory list; 
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fun rep_theory (Theory args) = args; 
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val identity_of = #1 o rep_theory; 
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val data_of = #2 o rep_theory; 
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val ancestry_of = #3 o rep_theory; 
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val history_of = #4 o rep_theory; 
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fun make_identity self id ids iids = {self = self, id = id, ids = ids, iids = iids}; 
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fun make_data theory proof = {theory = theory, proof = proof}; 
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fun make_ancestry parents ancestors = {parents = parents, ancestors = ancestors}; 
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fun make_history name vers ints = {name = name, version = vers, intermediates = ints}; 
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18731  185 
fun map_theory_data f {theory, proof} = make_data (f theory) proof; 
186 
fun map_proof_data f {theory, proof} = make_data theory (f proof); 

16533  187 

188 
val the_self = the o #self o identity_of; 

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val parents_of = #parents o ancestry_of; 
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val ancestors_of = #ancestors o ancestry_of; 
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val theory_name = #name o history_of; 
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(* staleness *) 
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16533  196 
fun eq_id ((i: int, _), (j, _)) = (i = j); 
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fun is_stale 
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(Theory ({self = SOME (ref (Theory ({id = id', ...}, _, _, _))), id, ...}, _, _, _)) = 
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not (eq_id (id, id')) 
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 is_stale (Theory ({self = NONE, ...}, _, _, _)) = true; 
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202 

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fun vitalize (thy as Theory ({self = SOME r, ...}, _, _, _)) = (r := thy; thy) 
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 vitalize (thy as Theory ({self = NONE, id, ids, iids}, data, ancestry, history)) = 
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let 
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val r = ref thy; 
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val thy' = Theory (make_identity (SOME r) id ids iids, data, ancestry, history); 
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in r := thy'; thy' end; 
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(* names *) 
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val ProtoPureN = "ProtoPure"; 
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val PureN = "Pure"; 
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val CPureN = "CPure"; 
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val draftN = "#"; 
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fun draft_id (_, name) = (name = draftN); 
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val is_draft = draft_id o #id o identity_of; 
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20821  221 
fun exists_name name (thy as Theory ({id, ids, iids, ...}, _, _, _)) = 
222 
name = theory_name thy orelse 

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name = #2 id orelse 
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Inttab.exists (equal name o #2) ids orelse 
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Inttab.exists (equal name o #2) iids; 
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fun names_of (Theory ({id, ids, iids, ...}, _, _, _)) = 
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rev (#2 id :: Inttab.fold (cons o #2) iids (Inttab.fold (cons o #2) ids [])); 
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fun pretty_thy thy = 
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Pretty.str_list "{" "}" (names_of thy @ (if is_stale thy then ["!"] else [])); 
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232 

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val string_of_thy = Pretty.string_of o pretty_thy; 
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val pprint_thy = Pretty.pprint o pretty_thy; 
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235 

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fun pretty_abbrev_thy thy = 
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let 
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val names = names_of thy; 
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val n = length names; 
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val abbrev = if n > 5 then "..." :: List.drop (names, n  5) else names; 
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in Pretty.str_list "{" "}" abbrev end; 
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242 

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val str_of_thy = Pretty.str_of o pretty_abbrev_thy; 
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16533  246 
(* consistency *) (*exception TERM*) 
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16719  248 
fun check_thy thy = 
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if is_stale thy then 
16719  250 
raise TERM ("Stale theory encountered:\n" ^ string_of_thy thy, []) 
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else thy; 
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252 

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fun check_ins id ids = 
16894  254 
if draft_id id orelse Inttab.defined ids (#1 id) then ids 
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else if Inttab.exists (equal (#2 id) o #2) ids then 
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raise TERM ("Different versions of theory component " ^ quote (#2 id), []) 
17412  257 
else Inttab.update id ids; 
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fun check_insert intermediate id (ids, iids) = 
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let val ids' = check_ins id ids and iids' = check_ins id iids 
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in if intermediate then (ids, iids') else (ids', iids) end; 
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262 

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fun check_merge 
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(Theory ({id = id1, ids = ids1, iids = iids1, ...}, _, _, history1)) 
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(Theory ({id = id2, ids = ids2, iids = iids2, ...}, _, _, history2)) = 
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(Inttab.fold check_ins ids2 ids1, Inttab.fold check_ins iids2 iids1) 
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> check_insert (#version history1 > 0) id1 
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> check_insert (#version history2 > 0) id2; 
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16533  271 
(* equality and inclusion *) 
272 

16719  273 
val eq_thy = eq_id o pairself (#id o identity_of o check_thy); 
22603  274 
val thy_ord = int_ord o pairself (#1 o #id o identity_of); 
16533  275 

276 
fun proper_subthy 

16719  277 
(Theory ({id = (i, _), ...}, _, _, _), Theory ({ids, iids, ...}, _, _, _)) = 
16894  278 
Inttab.defined ids i orelse Inttab.defined iids i; 
16533  279 

280 
fun subthy thys = eq_thy thys orelse proper_subthy thys; 

281 

16594  282 
fun joinable (thy1, thy2) = subthy (thy1, thy2) orelse subthy (thy2, thy1); 
283 

16533  284 

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(* theory references *) 
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(*theory_ref provides a safe way to store dynamic references to a 
16533  288 
theory in external data structures  a plain theory value would 
289 
become stale as the self reference moves on*) 

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datatype theory_ref = TheoryRef of theory ref; 
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16719  293 
val self_ref = TheoryRef o the_self o check_thy; 
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fun deref (TheoryRef (ref thy)) = thy; 
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295 

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16533  297 
(* trivial merge *) (*exception TERM*) 
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298 

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fun merge (thy1, thy2) = 
16719  300 
if eq_thy (thy1, thy2) then thy1 
301 
else if proper_subthy (thy2, thy1) then thy1 

302 
else if proper_subthy (thy1, thy2) then thy2 

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else (check_merge thy1 thy2; 
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raise TERM (cat_lines ["Attempt to perform nontrivial merge of theories:", 
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str_of_thy thy1, str_of_thy thy2], [])); 
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306 

16719  307 
fun merge_refs (ref1, ref2) = 
308 
if ref1 = ref2 then ref1 

309 
else self_ref (merge (deref ref1, deref ref2)); 

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311 

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312 

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(** build theories **) 
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314 

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(* primitives *) 
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316 

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fun create_thy name self id ids iids data ancestry history = 
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let 
17756  319 
val {version, name = _, intermediates = _} = history; 
320 
val intermediate = version > 0; 

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val (ids', iids') = check_insert intermediate id (ids, iids); 
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val id' = (serial (), name); 
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val _ = check_insert intermediate id' (ids', iids'); 
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val identity' = make_identity self id' ids' iids'; 
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in vitalize (Theory (identity', data, ancestry, history)) end; 
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326 

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fun change_thy name f (thy as Theory ({self, id, ids, iids}, data, ancestry, history)) = 
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let 
16719  329 
val _ = check_thy thy; 
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val (self', data', ancestry') = 
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if is_draft thy then (self, data, ancestry) (*destructive change!*) 
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else if #version history > 0 
18731  333 
then (NONE, map_theory_data copy_data data, ancestry) 
334 
else (NONE, map_theory_data extend_data data, 

335 
make_ancestry [thy] (thy :: #ancestors ancestry)); 

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val data'' = f data'; 
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in create_thy name self' id ids iids data'' ancestry' history end; 
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338 

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fun name_thy name = change_thy name I; 
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val modify_thy = change_thy draftN; 
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val extend_thy = modify_thy I; 
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342 

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fun copy_thy (thy as Theory ({id, ids, iids, ...}, data, ancestry, history)) = 
16719  344 
(check_thy thy; 
18731  345 
create_thy draftN NONE id ids iids (map_theory_data copy_data data) ancestry history); 
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346 

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val pre_pure_thy = create_thy draftN NONE (serial (), draftN) Inttab.empty Inttab.empty 
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(make_data Datatab.empty Datatab.empty) (make_ancestry [] []) (make_history ProtoPureN 0 []); 
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349 

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350 

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(* named theory nodes *) 
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352 

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fun merge_thys pp (thy1, thy2) = 
16533  354 
if exists_name CPureN thy1 <> exists_name CPureN thy2 then 
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355 
error "Cannot merge Pure and CPure developments" 
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356 
else 
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357 
let 
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358 
val (ids, iids) = check_merge thy1 thy2; 
16533  359 
val data1 = data_of thy1 and data2 = data_of thy2; 
360 
val data = make_data 

361 
(merge_data (pp thy1) (#theory data1, #theory data2)) 

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362 
(Datatab.merge (K true) (#proof data1, #proof data2)); 
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363 
val ancestry = make_ancestry [] []; 
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364 
val history = make_history "" 0 []; 
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365 
in create_thy draftN NONE (serial (), draftN) ids iids data ancestry history end; 
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366 

16533  367 
fun maximal_thys thys = 
368 
thys > filter (fn thy => not (exists (fn thy' => proper_subthy (thy, thy')) thys)); 

369 

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370 
fun begin_thy pp name imports = 
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371 
if name = draftN then error ("Illegal theory name: " ^ quote draftN) 
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372 
else 
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373 
let 
16533  374 
val parents = 
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375 
maximal_thys (distinct eq_thy (map check_thy imports)); 
22603  376 
val ancestors = distinct eq_thy (parents @ maps ancestors_of parents); 
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377 
val Theory ({id, ids, iids, ...}, data, _, _) = 
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378 
(case parents of 
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379 
[] => error "No parent theories" 
16533  380 
 [thy] => extend_thy thy 
381 
 thy :: thys => Library.foldl (merge_thys pp) (thy, thys)); 

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382 
val ancestry = make_ancestry parents ancestors; 
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383 
val history = make_history name 0 []; 
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384 
in create_thy draftN NONE id ids iids data ancestry history end; 
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385 

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386 

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387 
(* undoable checkpoints *) 
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388 

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389 
fun checkpoint_thy thy = 
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390 
if not (is_draft thy) then thy 
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391 
else 
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392 
let 
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393 
val {name, version, intermediates} = history_of thy; 
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394 
val thy' as Theory (identity', data', ancestry', _) = 
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395 
name_thy (name ^ ":" ^ string_of_int version) thy; 
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396 
val history' = make_history name (version + 1) (thy' :: intermediates); 
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397 
in vitalize (Theory (identity', data', ancestry', history')) end; 
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398 

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399 
fun finish_thy thy = 
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400 
let 
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401 
val {name, version, intermediates} = history_of thy; 
16719  402 
val rs = map (the_self o check_thy) intermediates; 
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403 
val thy' as Theory ({self, id, ids, ...}, data', ancestry', _) = name_thy name thy; 
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404 
val identity' = make_identity self id ids Inttab.empty; 
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405 
val history' = make_history name 0 []; 
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406 
val thy'' = vitalize (Theory (identity', data', ancestry', history')); 
16533  407 
val _ = List.app (fn r => r := thy'') rs; 
408 
in thy'' end; 

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409 

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410 

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411 
(* theory data *) 
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412 

16533  413 
fun dest_data name_of tab = 
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414 
map name_of (Datatab.keys tab) 
18931  415 
> map (rpair ()) > Symtab.make_list > Symtab.dest 
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416 
> map (apsnd length) 
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417 
> map (fn (name, 1) => name  (name, n) => name ^ enclose "[" "]" (string_of_int n)); 
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418 

16533  419 
val theory_data_of = dest_data invoke_name o #theory o data_of; 
420 

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421 
structure TheoryData = 
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422 
struct 
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423 

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424 
val declare = declare_theory_data; 
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425 

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426 
fun get k dest thy = 
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427 
(case Datatab.lookup (#theory (data_of thy)) k of 
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428 
SOME x => (dest x handle Match => 
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429 
error ("Failed to access theory data " ^ quote (invoke_name k))) 
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430 
 NONE => error ("Uninitialized theory data " ^ quote (invoke_name k))); 
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431 

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432 
fun put k mk x = modify_thy (map_theory_data (Datatab.update (k, mk x))); 
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433 
fun init k = put k I (invoke_empty k); 
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434 

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435 
end; 
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436 

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437 

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438 

16533  439 
(*** proof context ***) 
440 

441 
(* datatype proof *) 

442 

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443 
datatype proof = Proof of theory_ref * Object.T Datatab.table; 
17060
cca2f3938443
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444 

cca2f3938443
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445 
fun theory_of_proof (Proof (thy_ref, _)) = deref thy_ref; 
16533  446 
fun data_of_proof (Proof (_, data)) = data; 
17060
cca2f3938443
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447 
fun map_prf f (Proof (thy_ref, data)) = Proof (thy_ref, f data); 
cca2f3938443
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448 

cca2f3938443
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449 
fun transfer_proof thy' (prf as Proof (thy_ref, data)) = 
cca2f3938443
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450 
if not (subthy (deref thy_ref, thy')) then 
19815  451 
error "transfer proof context: not a super theory" 
17060
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452 
else Proof (self_ref thy', data); 
16533  453 

454 

455 
(* proof data kinds *) 

456 

457 
local 

458 

459 
type kind = 

460 
{name: string, 

461 
init: theory > Object.T}; 

462 

19028
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463 
val kinds = ref (Datatab.empty: kind Datatab.table); 
16533  464 

465 
fun invoke meth_name meth_fn k = 

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466 
(case Datatab.lookup (! kinds) k of 
16533  467 
SOME kind => meth_fn kind > transform_failure (fn exn => 
17340  468 
EXCEPTION (exn, "Proof data method " ^ #name kind ^ "." ^ meth_name ^ " failed")) 
16533  469 
 NONE => sys_error ("Invalid proof data identifier " ^ string_of_int k)); 
470 

471 
fun invoke_name k = invoke "name" (K o #name) k (); 

472 
val invoke_init = invoke "init" #init; 

473 

474 
in 

475 

476 
val proof_data_of = dest_data invoke_name o #proof o data_of; 

477 

478 
fun init_proof thy = 

19028
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479 
Proof (self_ref thy, Datatab.map' (fn k => fn _ => invoke_init k thy) (#proof (data_of thy))); 
16533  480 

481 
structure ProofData = 

482 
struct 

483 

484 
fun declare name init = 

485 
let 

486 
val k = serial (); 

487 
val kind = {name = name, init = init}; 

21962  488 
val _ = 
489 
if Datatab.exists (equal name o #name o #2) (! kinds) then 

490 
warning ("Duplicate declaration of proof data " ^ quote name) 

491 
else (); 

19028
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492 
val _ = change kinds (Datatab.update (k, kind)); 
16533  493 
in k end; 
494 

19028
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495 
fun init k = modify_thy (map_proof_data (Datatab.update (k, ()))); 
16533  496 

497 
fun get k dest prf = 

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498 
(case Datatab.lookup (data_of_proof prf) k of 
16533  499 
SOME x => (dest x handle Match => 
500 
error ("Failed to access proof data " ^ quote (invoke_name k))) 

501 
 NONE => error ("Uninitialized proof data " ^ quote (invoke_name k))); 

502 

19028
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503 
fun put k mk x = map_prf (Datatab.update (k, mk x)); 
16533  504 

505 
end; 

506 

507 
end; 

508 

509 

18632  510 

16533  511 
(*** generic context ***) 
512 

18632  513 
datatype generic = Theory of theory  Proof of proof; 
514 

515 
fun cases f _ (Theory thy) = f thy 

516 
 cases _ g (Proof prf) = g prf; 

16533  517 

19678  518 
fun mapping f g = cases (Theory o f) (Proof o g); 
21660  519 
fun mapping_result f g = cases (apsnd Theory o f) (apsnd Proof o g); 
19678  520 

18731  521 
val the_theory = cases I (fn _ => raise Fail "Illtyped context: theory expected"); 
522 
val the_proof = cases (fn _ => raise Fail "Illtyped context: proof expected") I; 

16533  523 

18731  524 
fun map_theory f = Theory o f o the_theory; 
525 
fun map_proof f = Proof o f o the_proof; 

526 

527 
fun theory_map f = the_theory o f o Theory; 

528 
fun proof_map f = the_proof o f o Proof; 

18665  529 

18632  530 
val theory_of = cases I theory_of_proof; 
531 
val proof_of = cases init_proof I; 

16533  532 

22085
c138cfd500f7
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533 

c138cfd500f7
ML context: full generic context, tuned signature;
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534 

22095
07875394618e
moved ML context stuff to from Context to ML_Context;
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22085
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535 
(** delayed theory setup **) 
22085
c138cfd500f7
ML context: full generic context, tuned signature;
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536 

c138cfd500f7
ML context: full generic context, tuned signature;
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537 
local 
c138cfd500f7
ML context: full generic context, tuned signature;
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diff
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538 
val setup_fn = ref (I: theory > theory); 
c138cfd500f7
ML context: full generic context, tuned signature;
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21962
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539 
in 
c138cfd500f7
ML context: full generic context, tuned signature;
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540 
fun add_setup f = setup_fn := (! setup_fn #> f); 
c138cfd500f7
ML context: full generic context, tuned signature;
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541 
fun setup () = let val f = ! setup_fn in setup_fn := I; f end; 
c138cfd500f7
ML context: full generic context, tuned signature;
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542 
end; 
c138cfd500f7
ML context: full generic context, tuned signature;
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543 

6185  544 
end; 
545 

546 
structure BasicContext: BASIC_CONTEXT = Context; 

547 
open BasicContext; 

16436
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548 

7eb6b6cbd166
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549 

7eb6b6cbd166
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550 

16533  551 
(*** typesafe interfaces for data declarations ***) 
552 

553 
(** theory data **) 

16436
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554 

7eb6b6cbd166
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555 
signature THEORY_DATA_ARGS = 
7eb6b6cbd166
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556 
sig 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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557 
val name: string 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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558 
type T 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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559 
val empty: T 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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560 
val copy: T > T 
7eb6b6cbd166
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561 
val extend: T > T 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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562 
val merge: Pretty.pp > T * T > T 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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563 
val print: theory > T > unit 
7eb6b6cbd166
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564 
end; 
7eb6b6cbd166
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changeset

565 

7eb6b6cbd166
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changeset

566 
signature THEORY_DATA = 
7eb6b6cbd166
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wenzelm
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567 
sig 
7eb6b6cbd166
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568 
type T 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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changeset

569 
val init: theory > theory 
7eb6b6cbd166
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570 
val print: theory > unit 
7eb6b6cbd166
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571 
val get: theory > T 
16489
f66ab8a4e98f
improved treatment of intermediate checkpoints: actual copy
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572 
val get_sg: theory > T (*obsolete*) 
16436
7eb6b6cbd166
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573 
val put: T > theory > theory 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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diff
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574 
val map: (T > T) > theory > theory 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
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diff
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575 
end; 
7eb6b6cbd166
added type theory: generic theory contexts with unique identity,
wenzelm
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diff
changeset

576 

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functor TheoryDataFun(Data: THEORY_DATA_ARGS): THEORY_DATA = 
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578 
struct 
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579 

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580 
structure TheoryData = Context.TheoryData; 
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581 

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type T = Data.T; 
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583 
exception Data of T; 
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584 

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585 
val kind = TheoryData.declare Data.name 
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(Data Data.empty) 
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587 
(fn Data x => Data (Data.copy x)) 
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588 
(fn Data x => Data (Data.extend x)) 
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589 
(fn pp => fn (Data x1, Data x2) => Data (Data.merge pp (x1, x2))); 
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590 

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591 
val init = TheoryData.init kind; 
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592 
val get = TheoryData.get kind (fn Data x => x); 
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val get_sg = get; 
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594 
fun print thy = Data.print thy (get thy); 
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595 
val put = TheoryData.put kind Data; 
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596 
fun map f thy = put (f (get thy)) thy; 
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597 

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598 
end; 
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599 

16533  600 

601 

602 
(** proof data **) 

603 

604 
signature PROOF_DATA_ARGS = 

605 
sig 

606 
val name: string 

607 
type T 

608 
val init: theory > T 

609 
val print: Context.proof > T > unit 

610 
end; 

611 

612 
signature PROOF_DATA = 

613 
sig 

614 
type T 

615 
val init: theory > theory 

616 
val print: Context.proof > unit 

617 
val get: Context.proof > T 

618 
val put: T > Context.proof > Context.proof 

619 
val map: (T > T) > Context.proof > Context.proof 

620 
end; 

621 

622 
functor ProofDataFun(Data: PROOF_DATA_ARGS): PROOF_DATA = 

623 
struct 

624 

625 
structure ProofData = Context.ProofData; 

626 

627 
type T = Data.T; 

628 
exception Data of T; 

629 

630 
val kind = ProofData.declare Data.name (Data o Data.init); 

631 

632 
val init = ProofData.init kind; 

633 
val get = ProofData.get kind (fn Data x => x); 

634 
fun print prf = Data.print prf (get prf); 

635 
val put = ProofData.put kind Data; 

636 
fun map f prf = put (f (get prf)) prf; 

637 

638 
end; 

639 

18632  640 

641 

642 
(** generic data **) 

643 

644 
signature GENERIC_DATA_ARGS = 

645 
sig 

646 
val name: string 

647 
type T 

648 
val empty: T 

649 
val extend: T > T 

650 
val merge: Pretty.pp > T * T > T 

651 
val print: Context.generic > T > unit 

652 
end; 

653 

654 
signature GENERIC_DATA = 

655 
sig 

656 
type T 

657 
val init: theory > theory 

658 
val get: Context.generic > T 

659 
val put: T > Context.generic > Context.generic 

660 
val map: (T > T) > Context.generic > Context.generic 

661 
val print: Context.generic > unit 

662 
end; 

663 

664 
functor GenericDataFun(Data: GENERIC_DATA_ARGS): GENERIC_DATA = 

665 
struct 

666 

667 
structure ThyData = TheoryDataFun(open Data val copy = I fun print _ _ = ()); 

668 
structure PrfData = 

669 
ProofDataFun(val name = Data.name type T = Data.T val init = ThyData.get fun print _ _ = ()); 

670 

671 
type T = Data.T; 

672 
val init = ThyData.init #> PrfData.init; 

673 

674 
fun get (Context.Theory thy) = ThyData.get thy 

675 
 get (Context.Proof prf) = PrfData.get prf; 

676 

677 
fun put x (Context.Theory thy) = Context.Theory (ThyData.put x thy) 

678 
 put x (Context.Proof prf) = Context.Proof (PrfData.put x prf); 

679 

680 
fun map f ctxt = put (f (get ctxt)) ctxt; 

681 

682 
fun print ctxt = Data.print ctxt (get ctxt); 

683 

684 
end; 

685 

16533  686 
(*hide private interface*) 
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687 
structure Context: CONTEXT = Context; 
20297  688 

21518  689 
(*fake predeclarations*) 
20297  690 
structure Proof = struct type context = Context.proof end; 
21518  691 
structure ProofContext = 
692 
struct val theory_of = Context.theory_of_proof val init = Context.init_proof end; 