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Wed, 08 Mar 2000 23:46:59 +0100  
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parent 8372  7b2cec1e789c 
child 8519  981f52707e5d 
permissions  rwrr 
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(* Title: Pure/Isar/method.ML 
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ID: $Id$ 

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Author: Markus Wenzel, TU Muenchen 

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Proof methods. 

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*) 

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signature BASIC_METHOD = 

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sig 

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val print_methods: theory > unit 

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val Method: bstring > (Args.src > Proof.context > Proof.method) > string > unit 

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end; 

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signature METHOD = 

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sig 

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include BASIC_METHOD 

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val print_global_rules: theory > unit 
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val print_local_rules: Proof.context > unit 
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val dest_global: theory attribute 
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val elim_global: theory attribute 
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val intro_global: theory attribute 
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val delrule_global: theory attribute 
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val dest_local: Proof.context attribute 
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val elim_local: Proof.context attribute 
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val intro_local: Proof.context attribute 
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val delrule_local: Proof.context attribute 
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val METHOD: (thm list > tactic) > Proof.method 
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val METHOD_CASES: 
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(thm list > thm > (thm * (string * RuleCases.T) list) Seq.seq) > Proof.method 

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val METHOD0: tactic > Proof.method 
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val fail: Proof.method 

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val succeed: Proof.method 

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val defer: int option > Proof.method 
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val prefer: int > Proof.method 

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val insert_tac: thm list > int > tactic 
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val insert: thm list > Proof.method 
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val insert_facts: Proof.method 
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val unfold: thm list > Proof.method 
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val fold: thm list > Proof.method 
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val multi_resolve: thm list > thm > thm Seq.seq 

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val multi_resolves: thm list > thm list > thm Seq.seq 

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val resolveq_tac: thm Seq.seq > int > tactic 
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val resolveq_cases_tac: (thm * string list) Seq.seq 
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> int > thm > (thm * (string * RuleCases.T) list) Seq.seq 

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val rule_tac: thm list > thm list > int > tactic 
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val rule: thm list > Proof.method 

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val erule: thm list > Proof.method 
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val drule: thm list > Proof.method 
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val frule: thm list > Proof.method 

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val this: Proof.method 
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val assumption: Proof.context > Proof.method 
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val set_tactic: (Proof.context > thm list > tactic) > unit 
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val tactic: string > Proof.context > Proof.method 

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exception METHOD_FAIL of (string * Position.T) * exn 
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val help_methods: theory option > unit 
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val method: theory > Args.src > Proof.context > Proof.method 
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val add_methods: (bstring * (Args.src > Proof.context > Proof.method) * string) list 

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> theory > theory 

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val syntax: (Proof.context * Args.T list > 'a * (Proof.context * Args.T list)) > 
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Args.src > Proof.context > Proof.context * 'a 
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val simple_args: (Args.T list > 'a * Args.T list) 
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> ('a > Proof.context > Proof.method) > Args.src > Proof.context > Proof.method 

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val ctxt_args: (Proof.context > Proof.method) > Args.src > Proof.context > Proof.method 
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val no_args: Proof.method > Args.src > Proof.context > Proof.method 
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type modifier 
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val sectioned_args: (Proof.context * Args.T list > 'a * (Proof.context * Args.T list)) > 
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(Args.T list > modifier * Args.T list) list > 
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('a > Proof.context > Proof.method) > Args.src > Proof.context > Proof.method 
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val bang_sectioned_args: 
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(Args.T list > modifier * Args.T list) list > 

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(thm list > Proof.context > Proof.method) > Args.src > Proof.context > Proof.method 
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val only_sectioned_args: 
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(Args.T list > modifier * Args.T list) list > 

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(Proof.context > Proof.method) > Args.src > Proof.context > Proof.method 
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val thms_ctxt_args: (thm list > Proof.context > Proof.method) 
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> Args.src > Proof.context > Proof.method 

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val thms_args: (thm list > Proof.method) > Args.src > Proof.context > Proof.method 
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datatype text = 
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Basic of (Proof.context > Proof.method)  

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Source of Args.src  

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Then of text list  

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Orelse of text list  

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Try of text  

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Repeat1 of text 

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val refine: text > Proof.state > Proof.state Seq.seq 

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val refine_end: text > Proof.state > Proof.state Seq.seq 
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val proof: text option > Proof.state > Proof.state Seq.seq 
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val local_qed: text option 
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> ({kind: string, name: string, thm: thm} > unit) * (thm > unit) 

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> Proof.state > Proof.state Seq.seq 
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val local_terminal_proof: text * text option 
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> ({kind: string, name: string, thm: thm} > unit) * (thm > unit) 

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> Proof.state > Proof.state Seq.seq 
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val local_immediate_proof: ({kind: string, name: string, thm: thm} > unit) * (thm > unit) 
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> Proof.state > Proof.state Seq.seq 

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val local_default_proof: ({kind: string, name: string, thm: thm} > unit) * (thm > unit) 

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> Proof.state > Proof.state Seq.seq 
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val global_qed: text option > Proof.state > theory * {kind: string, name: string, thm: thm} 
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val global_terminal_proof: text * text option 
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> Proof.state > theory * {kind: string, name: string, thm: thm} 

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val global_immediate_proof: Proof.state > theory * {kind: string, name: string, thm: thm} 
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val global_default_proof: Proof.state > theory * {kind: string, name: string, thm: thm} 

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val setup: (theory > theory) list 
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end; 

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structure Method: METHOD = 

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struct 

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(** global and local rule data **) 
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fun prt_rules kind ths = 
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Pretty.writeln (Pretty.big_list ("standard " ^ kind ^ " rules:") (map Display.pretty_thm ths)); 
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fun print_rules (intro, elim) = 
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(prt_rules "introduction" intro; prt_rules "elimination" elim); 
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fun merge_rules (ths1, ths2) = Library.generic_merge Thm.eq_thm I I ths1 ths2; 
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(* theory data kind 'Isar/rules' *) 
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structure GlobalRulesArgs = 
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struct 
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val name = "Isar/rules"; 
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type T = thm list * thm list; 
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val empty = ([], []); 
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val copy = I; 
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val prep_ext = I; 
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fun merge ((intro1, elim1), (intro2, elim2)) = 
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(merge_rules (intro1, intro2), merge_rules (elim1, elim2)); 
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fun print _ = print_rules; 
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end; 
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structure GlobalRules = TheoryDataFun(GlobalRulesArgs); 
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val print_global_rules = GlobalRules.print; 
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(* proof data kind 'Isar/rules' *) 
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structure LocalRulesArgs = 
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struct 
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val name = "Isar/rules"; 
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type T = thm list * thm list; 
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val init = GlobalRules.get; 
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fun print _ = print_rules; 
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end; 
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structure LocalRules = ProofDataFun(LocalRulesArgs); 
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val print_local_rules = LocalRules.print; 
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(** attributes **) 
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(* add rules *) 
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local 
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fun add_rule thm rules = Library.gen_ins Thm.eq_thm (thm, rules); 
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fun del_rule thm rules = Library.gen_rem Thm.eq_thm (rules, thm); 
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fun add_dest thm (intro, elim) = (intro, add_rule (Tactic.make_elim thm) elim); 
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fun add_elim thm (intro, elim) = (intro, add_rule thm elim); 
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fun add_intro thm (intro, elim) = (add_rule thm intro, elim); 
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fun delrule thm (intro, elim) = (del_rule thm intro, del_rule thm elim); 
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fun mk_att f g (x, thm) = (f (g thm) x, thm); 
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in 
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val dest_global = mk_att GlobalRules.map add_dest; 
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val elim_global = mk_att GlobalRules.map add_elim; 
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val intro_global = mk_att GlobalRules.map add_intro; 
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val delrule_global = mk_att GlobalRules.map delrule; 
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val dest_local = mk_att LocalRules.map add_dest; 
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val elim_local = mk_att LocalRules.map add_elim; 
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val intro_local = mk_att LocalRules.map add_intro; 
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val delrule_local = mk_att LocalRules.map delrule; 
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end; 
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(* concrete syntax *) 
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val rule_atts = 
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[("dest", (Attrib.no_args dest_global, Attrib.no_args dest_local), "destruction rule"), 
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("elim", (Attrib.no_args elim_global, Attrib.no_args elim_local), "elimination rule"), 
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("intro", (Attrib.no_args intro_global, Attrib.no_args intro_local), "introduction rule"), 
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("delrule", (Attrib.no_args delrule_global, Attrib.no_args delrule_local), "delete rule")]; 
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(** proof methods **) 
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(* make methods *) 
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val METHOD = Proof.method; 
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val METHOD_CASES = Proof.method_cases; 
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fun METHOD0 tac = METHOD (fn [] => tac  _ => error "Method may not be used with facts"); 
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(* primitive *) 

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val fail = METHOD (K no_tac); 

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val succeed = METHOD (K all_tac); 

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(* shuffle *) 
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fun prefer i = METHOD (K (Tactic.defer_tac i THEN PRIMITIVE (Thm.permute_prems 0 ~1))); 
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fun defer opt_i = METHOD (K (Tactic.defer_tac (if_none opt_i 1))); 
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(* insert *) 
220 

221 
local 

5824  222 

6981  223 
fun cut_rule_tac raw_rule = 
224 
let 

225 
val rule = Drule.forall_intr_vars raw_rule; 

226 
val revcut_rl = Drule.incr_indexes_wrt [] [] [] [rule] Drule.revcut_rl; 

7555  227 
in Tactic.rtac (rule COMP revcut_rl) end; 
6981  228 

7419  229 
in 
5824  230 

7419  231 
fun insert_tac [] i = all_tac 
232 
 insert_tac facts i = EVERY (map (fn th => cut_rule_tac th i) facts); 

6981  233 

7555  234 
val insert_facts = METHOD (ALLGOALS o insert_tac); 
7664  235 
fun insert thms = METHOD (fn _ => ALLGOALS (insert_tac thms)); 
7419  236 

237 
end; 

5824  238 

239 

7601  240 
(* unfold / fold definitions *) 
6532  241 

7601  242 
fun unfold thms = METHOD (fn facts => ALLGOALS (insert_tac facts) THEN rewrite_goals_tac thms); 
7555  243 
fun fold thms = METHOD (fn facts => ALLGOALS (insert_tac facts) THEN fold_goals_tac thms); 
6532  244 

245 

7419  246 
(* multi_resolve *) 
247 

248 
local 

249 

250 
fun res th i rule = 

251 
Thm.biresolution false [(false, th)] i rule handle THM _ => Seq.empty; 

252 

253 
fun multi_res _ [] rule = Seq.single rule 

254 
 multi_res i (th :: ths) rule = Seq.flat (Seq.map (res th i) (multi_res (i + 1) ths rule)); 

255 

256 
in 

257 

258 
val multi_resolve = multi_res 1; 

8372  259 
fun multi_resolves facts rules = Seq.flat (Seq.map (multi_resolve facts) (Seq.of_list rules)); 
7419  260 

261 
end; 

262 

263 

8372  264 
(* general rule *) 
5824  265 

8335  266 
fun gen_resolveq_tac tac rules i st = 
8372  267 
Seq.flat (Seq.map (fn rule => tac rule i st) rules); 
268 

269 
val resolveq_tac = gen_resolveq_tac Tactic.rtac; 

8335  270 

8372  271 
val resolveq_cases_tac = gen_resolveq_tac (fn (rule, cases) => fn i => fn st => 
272 
Seq.map (rpair (RuleCases.make rule cases)) (Tactic.rtac rule i st)); 

8335  273 

274 

8372  275 
(* simple rule *) 
276 

7419  277 
local 
5824  278 

7130  279 
fun gen_rule_tac tac rules [] = tac rules 
8372  280 
 gen_rule_tac tac erules facts = gen_resolveq_tac (tac o single) (multi_resolves facts erules); 
7130  281 

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fun gen_rule tac rules = METHOD (FINDGOAL o tac rules); 
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fun gen_rule' tac arg_rules ctxt = METHOD (fn facts => 
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let val rules = 
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if not (null arg_rules) then arg_rules 
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else if null facts then #1 (LocalRules.get ctxt) 
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else op @ (LocalRules.get ctxt); 
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in FINDGOAL (tac rules facts) end); 
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8220  291 
fun setup raw_tac = 
292 
let val tac = gen_rule_tac raw_tac 

293 
in (tac, gen_rule tac, gen_rule' tac) end; 

294 

7419  295 
in 
296 

8220  297 
val (rule_tac, rule, some_rule) = setup Tactic.resolve_tac; 
298 
val (erule_tac, erule, some_erule) = setup Tactic.eresolve_tac; 

299 
val (drule_tac, drule, some_drule) = setup Tactic.dresolve_tac; 

300 
val (frule_tac, frule, some_frule) = setup Tactic.forward_tac; 

5824  301 

7419  302 
end; 
303 

304 

8195  305 
(* this *) 
306 

307 
val this = METHOD (EVERY o map (FINDGOAL o Tactic.rtac)); 

308 

309 

310 
(* assumption *) 

7555  311 

312 
fun assm_tac ctxt = 

313 
assume_tac APPEND' resolve_tac (filter Thm.no_prems (ProofContext.prems_of ctxt)); 

7419  314 

7555  315 
fun assumption_tac ctxt [] = assm_tac ctxt 
316 
 assumption_tac _ [fact] = resolve_tac [fact] 

317 
 assumption_tac _ _ = K no_tac; 

7419  318 

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fun assumption ctxt = METHOD (FINDGOAL o assumption_tac ctxt); 
7419  320 

321 

8329  322 
(* res_inst_tac emulations *) 
8238  323 

8329  324 
(*Note: insts refer to the implicit (!) goal context; use at your own risk*) 
8238  325 
fun gen_res_inst tac ((i, insts), thm) = 
326 
METHOD (fn facts => (insert_tac facts THEN' tac insts thm) i); 

327 

328 
val res_inst = gen_res_inst Tactic.res_inst_tac; 

329 
val eres_inst = gen_res_inst Tactic.eres_inst_tac; 

330 
val dres_inst = gen_res_inst Tactic.dres_inst_tac; 

331 
val forw_inst = gen_res_inst Tactic.forw_inst_tac; 

332 

333 

8329  334 
(* simple Prolog interpreter *) 
335 

336 
fun prolog_tac rules facts = 

337 
DEPTH_SOLVE_1 (HEADGOAL (Tactic.assume_tac APPEND' Tactic.resolve_tac (facts @ rules))); 

338 

339 
val prolog = METHOD o prolog_tac; 

340 

341 

8351  342 
(* ML tactics *) 
343 

344 
val tactic_ref = ref ((fn _ => raise Match): Proof.context > thm list > tactic); 

345 
fun set_tactic f = tactic_ref := f; 

346 

347 
fun tactic txt ctxt = METHOD (fn facts => 

8372  348 
(Context.use_mltext 
349 
("let fun (tactic: Proof.context > thm list > tactic) ctxt facts = \ 

350 
\let val thm = ProofContext.get_thm ctxt and thms = ProofContext.get_thms ctxt in\n" 

351 
^ txt ^ 

352 
"\nend in Method.set_tactic tactic end") 

353 
false (Some (ProofContext.theory_of ctxt)); ! tactic_ref ctxt facts)); 

8351  354 

355 

5824  356 

357 
(** methods theory data **) 

358 

359 
(* data kind 'Isar/methods' *) 

360 

361 
structure MethodsDataArgs = 

362 
struct 

363 
val name = "Isar/methods"; 

364 
type T = 

365 
{space: NameSpace.T, 

366 
meths: (((Args.src > Proof.context > Proof.method) * string) * stamp) Symtab.table}; 

367 

368 
val empty = {space = NameSpace.empty, meths = Symtab.empty}; 

6546  369 
val copy = I; 
5824  370 
val prep_ext = I; 
371 
fun merge ({space = space1, meths = meths1}, {space = space2, meths = meths2}) = 

372 
{space = NameSpace.merge (space1, space2), 

373 
meths = Symtab.merge eq_snd (meths1, meths2) handle Symtab.DUPS dups => 

374 
error ("Attempt to merge different versions of methods " ^ commas_quote dups)}; 

375 

7367  376 
fun print_meths verbose {space, meths} = 
5824  377 
let 
378 
fun prt_meth (name, ((_, comment), _)) = Pretty.block 

6849  379 
[Pretty.str (name ^ ":"), Pretty.brk 2, Pretty.str comment]; 
5824  380 
in 
7367  381 
if not verbose then () 
382 
else Pretty.writeln (Display.pretty_name_space ("method name space", space)); 

6849  383 
Pretty.writeln (Pretty.big_list "methods:" 
384 
(map prt_meth (NameSpace.cond_extern_table space meths))) 

5824  385 
end; 
7367  386 

387 
fun print _ = print_meths true; 

5824  388 
end; 
389 

390 
structure MethodsData = TheoryDataFun(MethodsDataArgs); 

391 
val print_methods = MethodsData.print; 

7611  392 

393 
fun help_methods None = writeln "methods: (unkown theory context)" 

394 
 help_methods (Some thy) = MethodsDataArgs.print_meths false (MethodsData.get thy); 

5824  395 

396 

397 
(* get methods *) 

398 

5916  399 
exception METHOD_FAIL of (string * Position.T) * exn; 
400 

5824  401 
fun method thy = 
402 
let 

403 
val {space, meths} = MethodsData.get thy; 

404 

5884  405 
fun meth src = 
406 
let 

407 
val ((raw_name, _), pos) = Args.dest_src src; 

408 
val name = NameSpace.intern space raw_name; 

409 
in 

5824  410 
(case Symtab.lookup (meths, name) of 
411 
None => error ("Unknown proof method: " ^ quote name ^ Position.str_of pos) 

5916  412 
 Some ((mth, _), _) => transform_failure (curry METHOD_FAIL (name, pos)) (mth src)) 
5824  413 
end; 
414 
in meth end; 

415 

416 

417 
(* add_methods *) 

418 

419 
fun add_methods raw_meths thy = 

420 
let 

421 
val full = Sign.full_name (Theory.sign_of thy); 

422 
val new_meths = 

423 
map (fn (name, f, comment) => (full name, ((f, comment), stamp ()))) raw_meths; 

424 

425 
val {space, meths} = MethodsData.get thy; 

426 
val space' = NameSpace.extend (space, map fst new_meths); 

427 
val meths' = Symtab.extend (meths, new_meths) handle Symtab.DUPS dups => 

428 
error ("Duplicate declaration of method(s) " ^ commas_quote dups); 

429 
in 

430 
thy > MethodsData.put {space = space', meths = meths'} 

431 
end; 

432 

433 
(*implicit version*) 

434 
fun Method name meth cmt = Context.>> (add_methods [(name, meth, cmt)]); 

435 

436 

5884  437 

438 
(** method syntax **) 

5824  439 

5884  440 
(* basic *) 
441 

442 
fun syntax (scan: (Proof.context * Args.T list > 'a * (Proof.context * Args.T list))) = 

443 
Args.syntax "method" scan; 

5824  444 

8351  445 
fun simple_args scan f src ctxt : Proof.method = 
446 
#2 (syntax (Scan.lift (scan >> (fn x => f x ctxt))) src ctxt); 

447 

7555  448 
fun ctxt_args (f: Proof.context > Proof.method) src ctxt = 
8282  449 
#2 (syntax (Scan.succeed (f ctxt)) src ctxt); 
7555  450 

451 
fun no_args m = ctxt_args (K m); 

5884  452 

453 

8351  454 

5884  455 
(* sections *) 
5824  456 

7268  457 
type modifier = (Proof.context > Proof.context) * Proof.context attribute; 
458 

459 
local 

460 

8381  461 
fun sect ss = Scan.first (map Scan.lift ss); 
5884  462 
fun thms ss = Scan.unless (sect ss) Attrib.local_thms; 
463 
fun thmss ss = Scan.repeat (thms ss) >> flat; 

464 

7268  465 
fun apply (f, att) (ctxt, ths) = Thm.applys_attributes ((f ctxt, ths), [att]); 
5824  466 

7268  467 
fun section ss = (sect ss  thmss ss) : (fn (m, ths) => Scan.depend (fn ctxt => 
468 
Scan.succeed (apply m (ctxt, ths)))) >> #2; 

5884  469 

7601  470 
fun sectioned args ss = args  Scan.repeat (section ss); 
5884  471 

7268  472 
in 
5824  473 

5884  474 
fun sectioned_args args ss f src ctxt = 
8282  475 
let val (ctxt', (x, _)) = syntax (sectioned args ss) src ctxt 
5921  476 
in f x ctxt' end; 
5884  477 

7601  478 
fun bang_sectioned_args ss f = sectioned_args Args.bang_facts ss f; 
479 
fun only_sectioned_args ss f = sectioned_args (Scan.succeed ()) ss (fn () => f); 

7268  480 

8093  481 
fun thms_ctxt_args f = sectioned_args (thmss []) [] f; 
482 
fun thms_args f = thms_ctxt_args (K o f); 

5824  483 

7268  484 
end; 
485 

5824  486 

8238  487 
(* insts *) 
488 

489 
val insts = 

490 
Scan.lift (Scan.optional (Args.$$$ "("  Args.!!! (Args.nat  Args.$$$ ")")) 1)  

491 
Args.enum1 "and" (Scan.lift (Args.name  Args.!!! (Args.$$$ "="  Args.name)))  

492 
(Scan.lift (Args.$$$ "in")  Attrib.local_thm); 

493 

8282  494 
fun inst_args f = f oo (#2 oo syntax insts); 
8238  495 

496 

5824  497 

498 
(** method text **) 

499 

500 
(* datatype text *) 

501 

502 
datatype text = 

503 
Basic of (Proof.context > Proof.method)  

504 
Source of Args.src  

505 
Then of text list  

506 
Orelse of text list  

507 
Try of text  

508 
Repeat1 of text; 

509 

510 

511 
(* refine *) 

512 

8238  513 
fun gen_refine f text state = 
5824  514 
let 
515 
val thy = Proof.theory_of state; 

516 

8238  517 
fun eval (Basic mth) = f mth 
518 
 eval (Source src) = f (method thy src) 

5824  519 
 eval (Then txts) = Seq.EVERY (map eval txts) 
520 
 eval (Orelse txts) = Seq.FIRST (map eval txts) 

521 
 eval (Try txt) = Seq.TRY (eval txt) 

522 
 eval (Repeat1 txt) = Seq.REPEAT1 (eval txt); 

523 
in eval text state end; 

524 

8238  525 
val refine = gen_refine Proof.refine; 
526 
val refine_end = gen_refine Proof.refine_end; 

6404  527 

5824  528 

6404  529 
(* structured proof steps *) 
5824  530 

7506  531 
val default_text = Source (Args.src (("default", []), Position.none)); 
8195  532 
val this_text = Basic (K this); 
533 

534 
fun finish ctxt = METHOD (K (FILTER Thm.no_prems (ALLGOALS (assm_tac ctxt) THEN flexflex_tac))); 

7555  535 

536 
fun finish_text None = Basic finish 

537 
 finish_text (Some txt) = Then [txt, Basic finish]; 

6872  538 

5824  539 
fun proof opt_text state = 
540 
state 

541 
> Proof.assert_backward 

6404  542 
> refine (if_none opt_text default_text) 
8242  543 
> Seq.map (Proof.goal_facts (K [])) 
5824  544 
> Seq.map Proof.enter_forward; 
545 

7439  546 
fun local_qed opt_text = Proof.local_qed (refine (finish_text opt_text)); 
6934  547 
fun local_terminal_proof (text, opt_text) pr = Seq.THEN (proof (Some text), local_qed opt_text pr); 
8195  548 
val local_immediate_proof = local_terminal_proof (this_text, None); 
6934  549 
val local_default_proof = local_terminal_proof (default_text, None); 
5824  550 

6872  551 

7439  552 
fun global_qeds opt_text = Proof.global_qed (refine (finish_text opt_text)); 
5824  553 

6951  554 
fun global_qed opt_text state = 
6872  555 
state 
6951  556 
> global_qeds opt_text 
6872  557 
> Proof.check_result "Failed to finish proof" state 
558 
> Seq.hd; 

559 

6934  560 
fun global_terminal_proof (text, opt_text) state = 
6872  561 
state 
562 
> proof (Some text) 

563 
> Proof.check_result "Terminal proof method failed" state 

6951  564 
> (Seq.flat o Seq.map (global_qeds opt_text)) 
6872  565 
> Proof.check_result "Failed to finish proof (after successful terminal method)" state 
566 
> Seq.hd; 

567 

8195  568 
val global_immediate_proof = global_terminal_proof (this_text, None); 
6934  569 
val global_default_proof = global_terminal_proof (default_text, None); 
5824  570 

571 

572 

573 
(** theory setup **) 

574 

575 
(* pure_methods *) 

576 

577 
val pure_methods = 

578 
[("fail", no_args fail, "force failure"), 

579 
("succeed", no_args succeed, "succeed"), 

7574  580 
("", no_args insert_facts, "do nothing, inserting current facts only"), 
7664  581 
("insert", thms_args insert, "insert theorems, ignoring facts (improper!)"), 
7601  582 
("unfold", thms_args unfold, "unfold definitions"), 
583 
("fold", thms_args fold, "fold definitions"), 

8153
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584 
("default", thms_ctxt_args some_rule, "apply some rule"), 
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585 
("rule", thms_ctxt_args some_rule, "apply some rule"), 
8220  586 
("erule", thms_ctxt_args some_erule, "apply some rule in elimination manner (improper!)"), 
587 
("drule", thms_ctxt_args some_drule, "apply some rule in destruct manner (improper!)"), 

588 
("frule", thms_ctxt_args some_frule, "apply some rule in forward manner (improper!)"), 

8195  589 
("this", no_args this, "apply current facts as rules"), 
8238  590 
("assumption", ctxt_args assumption, "proof by assumption, preferring facts"), 
591 
("res_inst_tac", inst_args res_inst, "res_inst_tac emulation (beware!)"), 

592 
("eres_inst_tac", inst_args eres_inst, "eres_inst_tac emulation (beware!)"), 

593 
("dres_inst_tac", inst_args dres_inst, "dres_inst_tac emulation (beware!)"), 

8329  594 
("forw_inst_tac", inst_args forw_inst, "forw_inst_tac emulation (beware!)"), 
8351  595 
("prolog", thms_args prolog, "simple prolog interpreter"), 
596 
("tactic", simple_args Args.name tactic, "ML tactic as proof method")]; 

5824  597 

598 

599 
(* setup *) 

600 

8153
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601 
val setup = 
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602 
[GlobalRules.init, LocalRules.init, Attrib.add_attributes rule_atts, 
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603 
MethodsData.init, add_methods pure_methods]; 
5824  604 

605 

606 
end; 

607 

608 

609 
structure BasicMethod: BASIC_METHOD = Method; 

610 
open BasicMethod; 