author  wenzelm 
Mon, 12 Jul 1999 22:29:38 +0200  
changeset 6986  82a4ac9c6b03 
parent 6952  0f7e8d42902b 
child 7002  01a4e15ee253 
permissions  rwrr 
5830  1 
(* Title: Pure/Isar/isar_thy.ML 
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ID: $Id$ 

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Author: Markus Wenzel, TU Muenchen 

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6371  5 
Pure/Isar derived theory operations. 
5830  6 
*) 
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signature ISAR_THY = 

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sig 

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val add_txt: Comment.text > ProofHistory.T > ProofHistory.T 
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val add_text: Comment.text > theory > theory 
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val add_title: Comment.text > Comment.text > Comment.text > theory > theory 

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val add_chapter: Comment.text > theory > theory 

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val add_section: Comment.text > theory > theory 

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val add_subsection: Comment.text > theory > theory 

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val add_subsubsection: Comment.text > theory > theory 

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val add_classes: (bclass * xclass list) list * Comment.text > theory > theory 
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val add_classes_i: (bclass * class list) list * Comment.text > theory > theory 
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val add_classrel: (xclass * xclass) * Comment.text > theory > theory 
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val add_classrel_i: (class * class) * Comment.text > theory > theory 
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val add_defsort: xsort * Comment.text > theory > theory 
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val add_defsort_i: sort * Comment.text > theory > theory 
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val add_nonterminals: (bstring * Comment.text) list > theory > theory 
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val add_tyabbrs: ((bstring * string list * string * mixfix) * Comment.text) list 
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> theory > theory 
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val add_tyabbrs_i: ((bstring * string list * typ * mixfix) * Comment.text) list 
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> theory > theory 
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val add_arities: ((xstring * xsort list * xsort) * Comment.text) list > theory > theory 
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val add_arities_i: ((string * sort list * sort) * Comment.text) list > theory > theory 
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val add_typedecl: (bstring * string list * mixfix) * Comment.text > theory > theory 
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val add_consts: ((bstring * string * mixfix) * Comment.text) list > theory > theory 
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val add_consts_i: ((bstring * typ * mixfix) * Comment.text) list > theory > theory 
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val add_modesyntax: string * bool > ((bstring * string * mixfix) * Comment.text) list 
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> theory > theory 
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val add_modesyntax_i: string * bool > ((bstring * typ * mixfix) * Comment.text) list 
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> theory > theory 
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val add_trrules: ((xstring * string) Syntax.trrule * Comment.text) list > theory > theory 
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val add_trrules_i: (Syntax.ast Syntax.trrule * Comment.text) list > theory > theory 
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val add_axioms: (((bstring * string) * Args.src list) * Comment.text) list > theory > theory 
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val add_axioms_i: (((bstring * term) * theory attribute list) * Comment.text) list 
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> theory > theory 
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val add_defs: (((bstring * string) * Args.src list) * Comment.text) list > theory > theory 
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val add_defs_i: (((bstring * term) * theory attribute list) * Comment.text) list 
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> theory > theory 
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val add_constdefs: (((bstring * string * mixfix) * Comment.text) * (string * Comment.text)) list 
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> theory > theory 
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val add_constdefs_i: (((bstring * typ * mixfix) * Comment.text) * (term * Comment.text)) list 
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> theory > theory 
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val apply_theorems: (xstring * Args.src list) list > theory > theory * thm list 
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val apply_theorems_i: (thm * theory attribute list) list > theory > theory * thm list 

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val have_theorems: ((bstring * Args.src list) * (xstring * Args.src list) list) * Comment.text 
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> theory > theory 
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val have_theorems_i: ((bstring * theory attribute list) * (thm * theory attribute list) list) 
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* Comment.text > theory > theory 
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val have_lemmas: ((bstring * Args.src list) * (xstring * Args.src list) list) * Comment.text 
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> theory > theory 
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val have_lemmas_i: ((bstring * theory attribute list) * (thm * theory attribute list) list) 
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* Comment.text > theory > theory 
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val have_facts: ((string * Args.src list) * (string * Args.src list) list) * Comment.text 
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> ProofHistory.T > ProofHistory.T 
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val have_facts_i: ((string * Proof.context attribute list) * 
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(thm * Proof.context attribute list) list) * Comment.text > ProofHistory.T > ProofHistory.T 
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val from_facts: (string * Args.src list) list * Comment.text > ProofHistory.T > ProofHistory.T 
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val from_facts_i: (thm * Proof.context attribute list) list * Comment.text 
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> ProofHistory.T > ProofHistory.T 
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val with_facts: (string * Args.src list) list * Comment.text > ProofHistory.T > ProofHistory.T 
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val with_facts_i: (thm * Proof.context attribute list) list * Comment.text 

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> ProofHistory.T > ProofHistory.T 

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val chain: Comment.text > ProofHistory.T > ProofHistory.T 
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val export_chain: Comment.text > ProofHistory.T > ProofHistory.T 
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val fix: (string * string option) list * Comment.text > ProofHistory.T > ProofHistory.T 
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val fix_i: (string * typ) list * Comment.text > ProofHistory.T > ProofHistory.T 
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val match_bind: ((string list * string) * Comment.text) list > ProofHistory.T > ProofHistory.T 
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val match_bind_i: ((term list * term) * Comment.text) list > ProofHistory.T > ProofHistory.T 
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val theorem: (bstring * Args.src list * (string * (string list * string list))) 
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* Comment.text > bool > theory > ProofHistory.T 

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val theorem_i: (bstring * theory attribute list * (term * (term list * term list))) 

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* Comment.text > bool > theory > ProofHistory.T 

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val lemma: (bstring * Args.src list * (string * (string list * string list))) 

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* Comment.text > bool > theory > ProofHistory.T 

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val lemma_i: (bstring * theory attribute list * (term * (term list * term list))) 

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* Comment.text > bool > theory > ProofHistory.T 

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val assume: (string * Args.src list * (string * (string list * string list)) list) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val assume_i: (string * Proof.context attribute list * (term * (term list * term list)) list) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val presume: (string * Args.src list * (string * (string list * string list)) list) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val presume_i: (string * Proof.context attribute list * (term * (term list * term list)) list) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val local_def: (string * Args.src list * ((string * string option) * (string * string list))) 
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* Comment.text > ProofHistory.T > ProofHistory.T 

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val local_def_i: (string * Args.src list * ((string * typ) * (term * term list))) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val show: (string * Args.src list * (string * (string list * string list))) 
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* Comment.text > ProofHistory.T > ProofHistory.T 

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val show_i: (string * Proof.context attribute list * (term * (term list * term list))) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val have: (string * Args.src list * (string * (string list * string list))) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val have_i: (string * Proof.context attribute list * (term * (term list * term list))) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val thus: (string * Args.src list * (string * (string list * string list))) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val thus_i: (string * Proof.context attribute list * (term * (term list * term list))) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val hence: (string * Args.src list * (string * (string list * string list))) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val hence_i: (string * Proof.context attribute list * (term * (term list * term list))) 

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* Comment.text > ProofHistory.T > ProofHistory.T 

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val begin_block: ProofHistory.T > ProofHistory.T 
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val next_block: ProofHistory.T > ProofHistory.T 

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val end_block: ProofHistory.T > ProofHistory.T 

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val tac: Method.text > ProofHistory.T > ProofHistory.T 

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val then_tac: Method.text > ProofHistory.T > ProofHistory.T 
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val proof: Comment.interest * (Method.text * Comment.interest) option 
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> ProofHistory.T > ProofHistory.T 
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val kill_proof: ProofHistory.T > theory 
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val qed: (Method.text * Comment.interest) option > Toplevel.transition > Toplevel.transition 
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val terminal_proof: (Method.text * Comment.interest) * (Method.text * Comment.interest) option 
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> Toplevel.transition > Toplevel.transition 

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val immediate_proof: Toplevel.transition > Toplevel.transition 
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val default_proof: Toplevel.transition > Toplevel.transition 

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val skip_proof: Toplevel.transition > Toplevel.transition 
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val also: ((string * Args.src list) list * Comment.interest) option * Comment.text 
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> Toplevel.transition > Toplevel.transition 

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val also_i: (thm list * Comment.interest) option * Comment.text 

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> Toplevel.transition > Toplevel.transition 

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val finally: ((string * Args.src list) list * Comment.interest) option * Comment.text 

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> Toplevel.transition > Toplevel.transition 

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val finally_i: (thm list * Comment.interest) option * Comment.text 

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> Toplevel.transition > Toplevel.transition 

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val use_mltext: string > theory option > theory option 
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val use_mltext_theory: string > theory > theory 

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val use_setup: string > theory > theory 

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val parse_ast_translation: string > theory > theory 

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val parse_translation: string > theory > theory 

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val print_translation: string > theory > theory 

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val typed_print_translation: string > theory > theory 

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val print_ast_translation: string > theory > theory 

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val token_translation: string > theory > theory 

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val add_oracle: (bstring * string) * Comment.text > theory > theory 
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val begin_theory: string > string list > (string * bool) list > theory 
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val end_theory: theory > theory 

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val theory: string * string list * (string * bool) list 
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> Toplevel.transition > Toplevel.transition 

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val context: string > Toplevel.transition > Toplevel.transition 

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val update_context: string > Toplevel.transition > Toplevel.transition 

5830  149 
end; 
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structure IsarThy: ISAR_THY = 

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struct 

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(** derived theory and proof operations **) 

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(* formal comments *) 
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fun add_txt comment = ProofHistory.apply Proof.assert_forward; 
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fun add_text comment thy = thy; 
6354  161 
fun add_title title author date thy = thy; 
5959  162 
val add_chapter = add_text; 
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val add_section = add_text; 

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val add_subsection = add_text; 

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val add_subsubsection = add_text; 

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(* signature and syntax *) 
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val add_classes = Theory.add_classes o Comment.ignore; 
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val add_classes_i = Theory.add_classes_i o Comment.ignore; 
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val add_classrel = Theory.add_classrel o single o Comment.ignore; 
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val add_classrel_i = Theory.add_classrel_i o single o Comment.ignore; 
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val add_defsort = Theory.add_defsort o Comment.ignore; 
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val add_defsort_i = Theory.add_defsort_i o Comment.ignore; 
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val add_nonterminals = Theory.add_nonterminals o map Comment.ignore; 
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val add_tyabbrs = Theory.add_tyabbrs o map Comment.ignore; 
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val add_tyabbrs_i = Theory.add_tyabbrs_i o map Comment.ignore; 
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val add_arities = Theory.add_arities o map Comment.ignore; 
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val add_arities_i = Theory.add_arities_i o map Comment.ignore; 
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val add_typedecl = PureThy.add_typedecls o single o Comment.ignore; 
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val add_consts = Theory.add_consts o map Comment.ignore; 
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val add_consts_i = Theory.add_consts_i o map Comment.ignore; 
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fun add_modesyntax mode = Theory.add_modesyntax mode o map Comment.ignore; 
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fun add_modesyntax_i mode = Theory.add_modesyntax_i mode o map Comment.ignore; 
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val add_trrules = Theory.add_trrules o map Comment.ignore; 
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val add_trrules_i = Theory.add_trrules_i o map Comment.ignore; 
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5830  191 
(* axioms and defs *) 
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5915  193 
fun add_axms f args thy = 
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f (map (fn (x, srcs) => (x, map (Attrib.global_attribute thy) srcs)) args) thy; 

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val add_axioms = add_axms PureThy.add_axioms o map Comment.ignore; 
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val add_axioms_i = PureThy.add_axioms_i o map Comment.ignore; 
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val add_defs = add_axms PureThy.add_defs o map Comment.ignore; 
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val add_defs_i = PureThy.add_defs_i o map Comment.ignore; 
6371  200 

201 

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(* constdefs *) 

203 

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fun gen_add_constdefs consts defs args thy = 

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thy 

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> consts (map (Comment.ignore o fst) args) 
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> defs (map (fn (((c, _, mx), _), (s, _)) => 
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(((Thm.def_name (Syntax.const_name c mx), s), []), Comment.none)) args); 
6371  209 

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fun add_constdefs args = gen_add_constdefs Theory.add_consts add_defs args; 
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fun add_constdefs_i args = gen_add_constdefs Theory.add_consts_i add_defs_i args; 
5915  212 

213 

214 
(* theorems *) 

215 

216 
fun gen_have_thmss get attrib f ((name, more_srcs), th_srcs) x = 

217 
f name (map (attrib x) more_srcs) 

218 
(map (fn (s, srcs) => (get x s, map (attrib x) srcs)) th_srcs) x; 

219 

6371  220 
fun global_have_thmss x = gen_have_thmss PureThy.get_thms Attrib.global_attribute x; 
5915  221 

6371  222 
fun local_have_thmss x = 
223 
gen_have_thmss (ProofContext.get_thms o Proof.context_of) 

224 
(Attrib.local_attribute o Proof.theory_of) x; 

225 

226 
fun have_thmss_i f ((name, more_atts), th_atts) = 

227 
f name more_atts (map (apfst single) th_atts); 

228 

229 
fun have_lemss name atts = PureThy.have_thmss name (atts @ [Drule.tag_lemma]); 

5915  230 

231 

6371  232 
fun apply_theorems th_srcs = global_have_thmss PureThy.have_thmss ((None, []), th_srcs); 
233 
fun apply_theorems_i th_srcs = have_thmss_i PureThy.have_thmss ((None, []), th_srcs); 

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val have_theorems = #1 oo (global_have_thmss (PureThy.have_thmss o Some) o Comment.ignore); 
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val have_theorems_i = #1 oo (have_thmss_i (PureThy.have_thmss o Some) o Comment.ignore); 
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val have_lemmas = #1 oo (global_have_thmss (have_lemss o Some) o Comment.ignore); 
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val have_lemmas_i = #1 oo (have_thmss_i (have_lemss o Some) o Comment.ignore); 
6879  238 
val have_facts = ProofHistory.apply o local_have_thmss (Proof.have_thmss []) o Comment.ignore; 
239 
val have_facts_i = ProofHistory.apply o have_thmss_i (Proof.have_thmss []) o Comment.ignore; 

6371  240 

5915  241 

6371  242 
(* forward chaining *) 
243 

6879  244 
fun gen_from_facts f = ProofHistory.apply o (Proof.chain oo curry f ("", [])); 
245 

246 
fun add_thmss name atts ths_atts state = 

247 
Proof.have_thmss (Proof.the_facts state) name atts ths_atts state; 

6371  248 

6879  249 
val from_facts = gen_from_facts (local_have_thmss (Proof.have_thmss [])) o Comment.ignore; 
250 
val from_facts_i = gen_from_facts (have_thmss_i (Proof.have_thmss [])) o Comment.ignore; 

251 
val with_facts = gen_from_facts (local_have_thmss add_thmss) o Comment.ignore; 

252 
val with_facts_i = gen_from_facts (have_thmss_i add_thmss) o Comment.ignore; 

253 

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fun chain comment_ignore = ProofHistory.apply Proof.chain; 
6937  255 
fun export_chain comment_ignore = ProofHistory.applys Proof.export_chain; 
5830  256 

257 

258 
(* context *) 

259 

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val fix = ProofHistory.apply o Proof.fix o Comment.ignore; 
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val fix_i = ProofHistory.apply o Proof.fix_i o Comment.ignore; 
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val match_bind = ProofHistory.apply o Proof.match_bind o map Comment.ignore; 
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val match_bind_i = ProofHistory.apply o Proof.match_bind_i o map Comment.ignore; 
5830  264 

265 

266 
(* statements *) 

267 

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fun global_statement f (name, src, s) int thy = 
6688  269 
ProofHistory.init (Toplevel.undo_limit int) 
270 
(f name (map (Attrib.global_attribute thy) src) s thy); 

5830  271 

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fun global_statement_i f (name, atts, t) int thy = 
6688  273 
ProofHistory.init (Toplevel.undo_limit int) (f name atts t thy); 
6501  274 

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fun local_statement f g (name, src, s) = ProofHistory.apply (fn state => 
6501  276 
f name (map (Attrib.local_attribute (Proof.theory_of state)) src) s (g state)); 
6371  277 

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fun local_statement_i f g (name, atts, t) = ProofHistory.apply (f name atts t o g); 
5830  279 

6952  280 
val theorem = global_statement Proof.theorem o Comment.ignore; 
281 
val theorem_i = global_statement_i Proof.theorem_i o Comment.ignore; 

282 
val lemma = global_statement Proof.lemma o Comment.ignore; 

283 
val lemma_i = global_statement_i Proof.lemma_i o Comment.ignore; 

284 
val assume = local_statement Proof.assume I o Comment.ignore; 

285 
val assume_i = local_statement_i Proof.assume_i I o Comment.ignore; 

286 
val presume = local_statement Proof.presume I o Comment.ignore; 

287 
val presume_i = local_statement_i Proof.presume_i I o Comment.ignore; 

288 
val local_def = local_statement LocalDefs.def I o Comment.ignore; 

289 
val local_def_i = local_statement LocalDefs.def_i I o Comment.ignore; 

290 
val show = local_statement Proof.show I o Comment.ignore; 

291 
val show_i = local_statement_i Proof.show_i I o Comment.ignore; 

292 
val have = local_statement Proof.have I o Comment.ignore; 

293 
val have_i = local_statement_i Proof.have_i I o Comment.ignore; 

294 
val thus = local_statement Proof.show Proof.chain o Comment.ignore; 

295 
val thus_i = local_statement_i Proof.show_i Proof.chain o Comment.ignore; 

296 
val hence = local_statement Proof.have Proof.chain o Comment.ignore; 

297 
val hence_i = local_statement_i Proof.have_i Proof.chain o Comment.ignore; 

5830  298 

299 

300 
(* blocks *) 

301 

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val begin_block = ProofHistory.apply Proof.begin_block; 
5830  303 
val next_block = ProofHistory.apply Proof.next_block; 
6937  304 
val end_block = ProofHistory.applys Proof.end_block; 
5830  305 

306 

307 
(* backward steps *) 

308 

309 
val tac = ProofHistory.applys o Method.tac; 

5882  310 
val then_tac = ProofHistory.applys o Method.then_tac; 
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val proof = 
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ProofHistory.applys o Method.proof o apsome Comment.ignore_interest o Comment.ignore_interest'; 
6404  314 

315 

6732  316 
(* print result *) 
317 

318 
fun pretty_result {kind, name, thm} = 

6986  319 
Pretty.block [Pretty.str (kind ^ " " ^ name ^ ":"), Pretty.fbrk, Proof.pretty_thm thm]; 
320 

321 
fun pretty_rule thm = 

322 
Pretty.block [Pretty.str "solving goal by rule:", Pretty.fbrk, Proof.pretty_thm thm]; 

6732  323 

324 
val print_result = Pretty.writeln o pretty_result; 

325 

6986  326 
fun cond_print_result_rule int = 
327 
if int then (print_result, Pretty.writeln o pretty_rule) 

328 
else (K (), K ()); 

329 

330 
fun proof'' f = Toplevel.proof' (f o cond_print_result_rule); 

6732  331 

332 

6404  333 
(* local endings *) 
334 

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val local_qed = 
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proof'' o (ProofHistory.applys oo Method.local_qed) o apsome Comment.ignore_interest; 
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6937  338 
fun ignore_interests (x, y) = (Comment.ignore_interest x, apsome Comment.ignore_interest y); 
339 

6688  340 
val local_terminal_proof = 
6937  341 
proof'' o (ProofHistory.applys oo Method.local_terminal_proof) o ignore_interests; 
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342 

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val local_immediate_proof = proof'' (ProofHistory.applys o Method.local_immediate_proof); 
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val local_default_proof = proof'' (ProofHistory.applys o Method.local_default_proof); 
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val local_skip_proof = proof'' (ProofHistory.applys o SkipProof.local_skip_proof); 
6404  346 

347 

348 
(* global endings *) 

349 

350 
val kill_proof = Proof.theory_of o ProofHistory.current; 

351 

352 
fun global_result finish = Toplevel.proof_to_theory (fn prf => 

353 
let 

354 
val state = ProofHistory.current prf; 

355 
val _ = if Proof.at_bottom state then () else raise Toplevel.UNDEF; 

6732  356 
val (thy, res) = finish state; 
357 
in print_result res; thy end); 

6404  358 

6952  359 
val global_qed = global_result o Method.global_qed o apsome Comment.ignore_interest; 
6937  360 
val global_terminal_proof = global_result o Method.global_terminal_proof o ignore_interests; 
6404  361 
val global_immediate_proof = global_result Method.global_immediate_proof; 
362 
val global_default_proof = global_result Method.global_default_proof; 

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val global_skip_proof = global_result SkipProof.global_skip_proof; 
6404  364 

365 

366 
(* common endings *) 

367 

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fun qed meth = local_qed meth o global_qed meth; 
6937  369 
fun terminal_proof meths = local_terminal_proof meths o global_terminal_proof meths; 
6404  370 
val immediate_proof = local_immediate_proof o global_immediate_proof; 
371 
val default_proof = local_default_proof o global_default_proof; 

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val skip_proof = local_skip_proof o global_skip_proof; 
5830  373 

374 

6774  375 
(* calculational proof commands *) 
376 

6879  377 
local 
378 

6774  379 
fun cond_print_calc int thm = 
6986  380 
if int then Pretty.writeln (Pretty.big_list "calculation:" [Proof.pretty_thm thm]) 
6774  381 
else (); 
382 

383 
fun proof''' f = Toplevel.proof' (f o cond_print_calc); 

384 

6879  385 
fun get_thmss srcs = Proof.the_facts o local_have_thmss (Proof.have_thmss []) (("", []), srcs); 
386 
fun get_thmss_i thms _ = thms; 

387 

388 
fun gen_calc get f (args, _) prt state = 

389 
f (apsome (fn (srcs, _) => get srcs state) args) prt state; 

390 

391 
in 

392 

393 
fun also x = proof''' (ProofHistory.applys o gen_calc get_thmss Calculation.also x); 

394 
fun also_i x = proof''' (ProofHistory.applys o gen_calc get_thmss_i Calculation.also x); 

395 
fun finally x = proof''' (ProofHistory.applys o gen_calc get_thmss Calculation.finally x); 

396 
fun finally_i x = proof''' (ProofHistory.applys o gen_calc get_thmss_i Calculation.finally x); 

397 

398 
end; 

6774  399 

400 

5830  401 
(* use ML text *) 
402 

6331  403 
fun use_mltext txt opt_thy = #2 (Context.pass opt_thy (use_text false) txt); 
404 
fun use_mltext_theory txt thy = #2 (Context.pass_theory thy (use_text false) txt); 

5830  405 

406 
fun use_context txt = use_mltext_theory ("Context.>> (" ^ txt ^ ");"); 

407 

408 
fun use_let name body txt = 

409 
use_context ("let val " ^ name ^ " = " ^ txt ^ " in\n" ^ body ^ " end"); 

410 

411 
val use_setup = 

5915  412 
use_let "setup: (theory > theory) list" "Library.apply setup"; 
5830  413 

414 

415 
(* translation functions *) 

416 

417 
val parse_ast_translation = 

418 
use_let "parse_ast_translation: (string * (Syntax.ast list > Syntax.ast)) list" 

419 
"Theory.add_trfuns (parse_ast_translation, [], [], [])"; 

420 

421 
val parse_translation = 

422 
use_let "parse_translation: (string * (term list > term)) list" 

423 
"Theory.add_trfuns ([], parse_translation, [], [])"; 

424 

425 
val print_translation = 

426 
use_let "print_translation: (string * (term list > term)) list" 

427 
"Theory.add_trfuns ([], [], print_translation, [])"; 

428 

429 
val print_ast_translation = 

430 
use_let "print_ast_translation: (string * (Syntax.ast list > Syntax.ast)) list" 

431 
"Theory.add_trfuns ([], [], [], print_ast_translation)"; 

432 

433 
val typed_print_translation = 

434 
use_let "typed_print_translation: (string * (bool > typ > term list > term)) list" 

435 
"Theory.add_trfunsT typed_print_translation"; 

436 

437 
val token_translation = 

438 
use_let "token_translation: (string * string * (string > string * int)) list" 

439 
"Theory.add_tokentrfuns token_translation"; 

440 

441 

442 
(* add_oracle *) 

443 

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fun add_oracle ((name, txt), comment_ignore) = 
5830  445 
use_let 
446 
"oracle: bstring * (Sign.sg * Object.T > term)" 

447 
"Theory.add_oracle oracle" 

448 
("(" ^ quote name ^ ", " ^ txt ^ ")"); 

449 

450 

6688  451 
(* theory init and exit *) 
5830  452 

6331  453 
fun begin_theory name parents files = 
6266  454 
let 
6331  455 
val paths = map (apfst Path.unpack) files; 
456 
val thy = ThyInfo.begin_theory name parents paths; 

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in Present.begin_theory name parents paths thy end; 
5830  458 

6331  459 
fun end_theory thy = 
460 
(Present.end_theory (PureThy.get_name thy); ThyInfo.end_theory thy); 

461 

6688  462 
fun kill_theory thy = ThyInfo.remove_thy (PureThy.get_name thy); 
463 

6331  464 
fun bg_theory (name, parents, files) () = begin_theory name parents files; 
465 
fun en_theory thy = (end_theory thy; ()); 

466 

6688  467 
fun theory spec = Toplevel.init_theory (bg_theory spec) en_theory kill_theory; 
6246  468 

469 

470 
(* context switch *) 

471 

6483  472 
fun switch_theory load s = 
6688  473 
Toplevel.init_theory (fn () => (the (#2 (Context.pass None load s)))) (K ()) (K ()); 
6246  474 

475 
val context = switch_theory ThyInfo.use_thy; 

476 
val update_context = switch_theory ThyInfo.update_thy; 

477 

5830  478 

479 
end; 