author  wenzelm 
Thu, 01 Oct 2009 14:27:50 +0200  
changeset 32810  f3466a5645fa 
parent 32726  a900d3cd47cc 
child 33170  dd6d8d1f70d2 
permissions  rwrr 
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New function thm_deps for visualizing dependencies of theorems.
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(* Title: Pure/Thy/thm_deps.ML 
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Author: Stefan Berghofer, TU Muenchen 
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New function thm_deps for visualizing dependencies of theorems.
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New function thm_deps for visualizing dependencies of theorems.
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Visualize dependencies of theorems. 
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New function thm_deps for visualizing dependencies of theorems.
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*) 
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New function thm_deps for visualizing dependencies of theorems.
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signature THM_DEPS = 
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sig 
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val thm_deps: thm list > unit 
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val unused_thms: theory list * theory list > (string * thm) list 

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end; 
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structure ThmDeps: THM_DEPS = 
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struct 
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(* thm_deps *) 
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fun thm_deps thms = 
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let 
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fun add_dep ("", _, _) = I 
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 add_dep (name, _, PBody {thms = thms', ...}) = 
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let 
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val prefix = #1 (Library.split_last (Long_Name.explode name)); 
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val session = 
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(case prefix of 
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a :: _ => 
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(case ThyInfo.lookup_theory a of 
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SOME thy => 
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(case Present.session_name thy of 
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"" => [] 
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 session => [session]) 
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 NONE => []) 
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 _ => ["global"]); 
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val parents = filter_out (fn s => s = "") (map (#1 o #2) thms'); 
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val entry = 
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{name = Long_Name.base_name name, 
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ID = name, 
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dir = space_implode "/" (session @ prefix), 
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unfold = false, 
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path = "", 
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parents = parents}; 
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in cons entry end; 
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val deps = Proofterm.fold_body_thms add_dep (map Thm.proof_body_of thms) []; 
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in Present.display_graph (sort_wrt #ID deps) end; 
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(* unused_thms *) 

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fun unused_thms (base_thys, thys) = 

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let 
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fun add_fact (name, ths) = 
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if exists (fn thy => PureThy.defined_fact thy name) base_thys then I 

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else fold_rev (fn th => (case Thm.get_name th of "" => I  a => cons (a, th))) ths; 

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val thms = 
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fold (Facts.fold_static add_fact o PureThy.facts_of) thys [] 

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> sort_distinct (string_ord o pairself #1); 

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back to simple fold_body_thms and fulfill_proof/thm_proof (reverting a900d3cd47cc)  the cycle check is implicit in the future computation of join_proofs;
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val tab = 
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Proofterm.fold_body_thms 
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(fn (name, prop, _) => name <> "" ? Symtab.insert_list (op =) (name, prop)) 
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(map (Proofterm.strip_thm o Thm.proof_body_of o snd) thms) Symtab.empty; 
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fun is_unused (name, th) = 
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not (member (op aconv) (Symtab.lookup_list tab name) (Thm.prop_of th)); 

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(* groups containing at least one used theorem *) 
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val grps = fold (fn p as (_, thm) => if is_unused p then I else 

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case Thm.get_group thm of 
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NONE => I  SOME grp => Symtab.update (grp, ())) thms Symtab.empty; 
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val (thms', _) = fold (fn p as (s, thm) => fn q as (thms, grps') => 

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if member (op =) [Thm.theoremK, Thm.generatedK, Thm.lemmaK, Thm.corollaryK, Thm.axiomK] (Thm.get_kind thm) 
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andalso is_unused p 
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then 

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(case Thm.get_group thm of 
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NONE => (p :: thms, grps') 
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 SOME grp => 

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(* do not output theorem if another theorem in group has been used *) 

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if Symtab.defined grps grp then q 
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(* output at most one unused theorem per group *) 
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else if Symtab.defined grps' grp then q 
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else (p :: thms, Symtab.update (grp, ()) grps')) 
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else q) thms ([], Symtab.empty) 

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in rev thms' end; 

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end; 
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