author  wenzelm 
Thu, 08 Jul 1999 18:37:54 +0200  
changeset 6937  d9e3e2b30bee 
parent 6904  4125d6b6d8f9 
child 6952  0f7e8d42902b 
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 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 global_qed_with: bstring option * Args.src list option 
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> (Method.text * Comment.interest) option 
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> Toplevel.transition > Toplevel.transition 
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val global_qed_with_i: bstring option * theory attribute list option 
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> (Method.text * Comment.interest) option 
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> Toplevel.transition > Toplevel.transition 
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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  151 
end; 
152 

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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; 
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fun add_title title author date thy = thy; 
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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  193 
(* axioms and defs *) 
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5915  195 
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  202 

203 

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(* constdefs *) 

205 

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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  211 

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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  214 

215 

216 
(* theorems *) 

217 

218 
fun gen_have_thmss get attrib f ((name, more_srcs), th_srcs) x = 

219 
f name (map (attrib x) more_srcs) 

220 
(map (fn (s, srcs) => (get x s, map (attrib x) srcs)) th_srcs) x; 

221 

6371  222 
fun global_have_thmss x = gen_have_thmss PureThy.get_thms Attrib.global_attribute x; 
5915  223 

6371  224 
fun local_have_thmss x = 
225 
gen_have_thmss (ProofContext.get_thms o Proof.context_of) 

226 
(Attrib.local_attribute o Proof.theory_of) x; 

227 

228 
fun have_thmss_i f ((name, more_atts), th_atts) = 

229 
f name more_atts (map (apfst single) th_atts); 

230 

231 
fun have_lemss name atts = PureThy.have_thmss name (atts @ [Drule.tag_lemma]); 

5915  232 

233 

6371  234 
fun apply_theorems th_srcs = global_have_thmss PureThy.have_thmss ((None, []), th_srcs); 
235 
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  240 
val have_facts = ProofHistory.apply o local_have_thmss (Proof.have_thmss []) o Comment.ignore; 
241 
val have_facts_i = ProofHistory.apply o have_thmss_i (Proof.have_thmss []) o Comment.ignore; 

6371  242 

5915  243 

6371  244 
(* forward chaining *) 
245 

6879  246 
fun gen_from_facts f = ProofHistory.apply o (Proof.chain oo curry f ("", [])); 
247 

248 
fun add_thmss name atts ths_atts state = 

249 
Proof.have_thmss (Proof.the_facts state) name atts ths_atts state; 

6371  250 

6879  251 
val from_facts = gen_from_facts (local_have_thmss (Proof.have_thmss [])) o Comment.ignore; 
252 
val from_facts_i = gen_from_facts (have_thmss_i (Proof.have_thmss [])) o Comment.ignore; 

253 
val with_facts = gen_from_facts (local_have_thmss add_thmss) o Comment.ignore; 

254 
val with_facts_i = gen_from_facts (have_thmss_i add_thmss) o Comment.ignore; 

255 

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fun chain comment_ignore = ProofHistory.apply Proof.chain; 
6937  257 
fun export_chain comment_ignore = ProofHistory.applys Proof.export_chain; 
5830  258 

259 

260 
(* context *) 

261 

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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  266 

267 

268 
(* statements *) 

269 

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fun global_statement f (name, src, s) int thy = 
6688  271 
ProofHistory.init (Toplevel.undo_limit int) 
272 
(f name (map (Attrib.global_attribute thy) src) s thy); 

5830  273 

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fun global_statement_i f (name, atts, t) int thy = 
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ProofHistory.init (Toplevel.undo_limit int) (f name atts t thy); 
6501  276 

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fun local_statement f g (name, src, s) = ProofHistory.apply (fn state => 
6501  278 
f name (map (Attrib.local_attribute (Proof.theory_of state)) src) s (g state)); 
6371  279 

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fun local_statement_i f g (name, atts, t) = ProofHistory.apply (f name atts t o g); 
5830  281 

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val theorem = global_statement Proof.theorem o Comment.ignore; 
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val theorem_i = global_statement_i Proof.theorem_i o Comment.ignore; 
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val lemma = global_statement Proof.lemma o Comment.ignore; 
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val lemma_i = global_statement_i Proof.lemma_i o Comment.ignore; 
6937  286 
val assume = local_statement Proof.assume I o Comment.ignore; 
287 
val assume_i = local_statement_i Proof.assume_i I o Comment.ignore; 

288 
val presume = local_statement Proof.presume I o Comment.ignore; 

289 
val presume_i = local_statement_i Proof.presume_i I o Comment.ignore; 

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val show = local_statement Proof.show I o Comment.ignore; 
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val show_i = local_statement_i Proof.show_i I o Comment.ignore; 
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val have = local_statement Proof.have I o Comment.ignore; 
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val have_i = local_statement_i Proof.have_i I o Comment.ignore; 
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val thus = local_statement Proof.show Proof.chain o Comment.ignore; 
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val thus_i = local_statement_i Proof.show_i Proof.chain o Comment.ignore; 
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val hence = local_statement Proof.have Proof.chain o Comment.ignore; 
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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} = 

6937  319 
Pretty.block [Pretty.str (kind ^ " " ^ name ^ ":"), Pretty.fbrk, Display.pretty_thm_no_hyps thm]; 
6732  320 

321 
val print_result = Pretty.writeln o pretty_result; 

322 
fun cond_print_result int res = if int then print_result res else (); 

323 

324 
fun proof'' f = Toplevel.proof' (f o cond_print_result); 

325 

326 

6404  327 
(* local endings *) 
328 

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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  332 
fun ignore_interests (x, y) = (Comment.ignore_interest x, apsome Comment.ignore_interest y); 
333 

6688  334 
val local_terminal_proof = 
6937  335 
proof'' o (ProofHistory.applys oo Method.local_terminal_proof) o ignore_interests; 
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336 

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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  340 

341 

342 
(* global endings *) 

343 

344 
val kill_proof = Proof.theory_of o ProofHistory.current; 

345 

346 
fun global_result finish = Toplevel.proof_to_theory (fn prf => 

347 
let 

348 
val state = ProofHistory.current prf; 

349 
val _ = if Proof.at_bottom state then () else raise Toplevel.UNDEF; 

6732  350 
val (thy, res) = finish state; 
351 
in print_result res; thy end); 

6404  352 

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fun gen_global_qed_with prep_att (alt_name, raw_atts) meth state = 
6404  354 
let 
355 
val thy = Proof.theory_of state; 

356 
val alt_atts = apsome (map (prep_att thy)) raw_atts; 

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in Method.global_qed alt_name alt_atts (apsome Comment.ignore_interest meth) state end; 
6404  358 

359 
val global_qed_with = global_result oo gen_global_qed_with Attrib.global_attribute; 

360 
val global_qed_with_i = global_result oo gen_global_qed_with (K I); 

361 
val global_qed = global_qed_with (None, None); 

362 

6937  363 
val global_terminal_proof = global_result o Method.global_terminal_proof o ignore_interests; 
6404  364 
val global_immediate_proof = global_result Method.global_immediate_proof; 
365 
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  367 

368 

369 
(* common endings *) 

370 

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fun qed meth = local_qed meth o global_qed meth; 
6937  372 
fun terminal_proof meths = local_terminal_proof meths o global_terminal_proof meths; 
6404  373 
val immediate_proof = local_immediate_proof o global_immediate_proof; 
374 
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  376 

377 

6774  378 
(* calculational proof commands *) 
379 

6879  380 
local 
381 

6774  382 
fun cond_print_calc int thm = 
6937  383 
if int then Pretty.writeln (Pretty.big_list "calculation:" [Display.pretty_thm_no_hyps thm]) 
6774  384 
else (); 
385 

386 
fun proof''' f = Toplevel.proof' (f o cond_print_calc); 

387 

6879  388 
fun get_thmss srcs = Proof.the_facts o local_have_thmss (Proof.have_thmss []) (("", []), srcs); 
389 
fun get_thmss_i thms _ = thms; 

390 

391 
fun gen_calc get f (args, _) prt state = 

392 
f (apsome (fn (srcs, _) => get srcs state) args) prt state; 

393 

394 
in 

395 

396 
fun also x = proof''' (ProofHistory.applys o gen_calc get_thmss Calculation.also x); 

397 
fun also_i x = proof''' (ProofHistory.applys o gen_calc get_thmss_i Calculation.also x); 

398 
fun finally x = proof''' (ProofHistory.applys o gen_calc get_thmss Calculation.finally x); 

399 
fun finally_i x = proof''' (ProofHistory.applys o gen_calc get_thmss_i Calculation.finally x); 

400 

401 
end; 

6774  402 

403 

5830  404 
(* use ML text *) 
405 

6331  406 
fun use_mltext txt opt_thy = #2 (Context.pass opt_thy (use_text false) txt); 
407 
fun use_mltext_theory txt thy = #2 (Context.pass_theory thy (use_text false) txt); 

5830  408 

409 
fun use_context txt = use_mltext_theory ("Context.>> (" ^ txt ^ ");"); 

410 

411 
fun use_let name body txt = 

412 
use_context ("let val " ^ name ^ " = " ^ txt ^ " in\n" ^ body ^ " end"); 

413 

414 
val use_setup = 

5915  415 
use_let "setup: (theory > theory) list" "Library.apply setup"; 
5830  416 

417 

418 
(* translation functions *) 

419 

420 
val parse_ast_translation = 

421 
use_let "parse_ast_translation: (string * (Syntax.ast list > Syntax.ast)) list" 

422 
"Theory.add_trfuns (parse_ast_translation, [], [], [])"; 

423 

424 
val parse_translation = 

425 
use_let "parse_translation: (string * (term list > term)) list" 

426 
"Theory.add_trfuns ([], parse_translation, [], [])"; 

427 

428 
val print_translation = 

429 
use_let "print_translation: (string * (term list > term)) list" 

430 
"Theory.add_trfuns ([], [], print_translation, [])"; 

431 

432 
val print_ast_translation = 

433 
use_let "print_ast_translation: (string * (Syntax.ast list > Syntax.ast)) list" 

434 
"Theory.add_trfuns ([], [], [], print_ast_translation)"; 

435 

436 
val typed_print_translation = 

437 
use_let "typed_print_translation: (string * (bool > typ > term list > term)) list" 

438 
"Theory.add_trfunsT typed_print_translation"; 

439 

440 
val token_translation = 

441 
use_let "token_translation: (string * string * (string > string * int)) list" 

442 
"Theory.add_tokentrfuns token_translation"; 

443 

444 

445 
(* add_oracle *) 

446 

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fun add_oracle ((name, txt), comment_ignore) = 
5830  448 
use_let 
449 
"oracle: bstring * (Sign.sg * Object.T > term)" 

450 
"Theory.add_oracle oracle" 

451 
("(" ^ quote name ^ ", " ^ txt ^ ")"); 

452 

453 

6688  454 
(* theory init and exit *) 
5830  455 

6331  456 
fun begin_theory name parents files = 
6266  457 
let 
6331  458 
val paths = map (apfst Path.unpack) files; 
459 
val thy = ThyInfo.begin_theory name parents paths; 

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460 
in Present.begin_theory name parents paths thy end; 
5830  461 

6331  462 
fun end_theory thy = 
463 
(Present.end_theory (PureThy.get_name thy); ThyInfo.end_theory thy); 

464 

6688  465 
fun kill_theory thy = ThyInfo.remove_thy (PureThy.get_name thy); 
466 

6331  467 
fun bg_theory (name, parents, files) () = begin_theory name parents files; 
468 
fun en_theory thy = (end_theory thy; ()); 

469 

6688  470 
fun theory spec = Toplevel.init_theory (bg_theory spec) en_theory kill_theory; 
6246  471 

472 

473 
(* context switch *) 

474 

6483  475 
fun switch_theory load s = 
6688  476 
Toplevel.init_theory (fn () => (the (#2 (Context.pass None load s)))) (K ()) (K ()); 
6246  477 

478 
val context = switch_theory ThyInfo.use_thy; 

479 
val update_context = switch_theory ThyInfo.update_thy; 

480 

5830  481 

482 
end; 