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src/FOL/ex/Iff_Oracle.thy
changeset 30549 d2d7874648bd
parent 30510 4120fc59dd85
child 30719 21c20c7d1932
equal deleted inserted replaced
30548:2eef5e71edd6 30549:d2d7874648bd 
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    52 subsection {* Oracle as proof method *}
 
    52 subsection {* Oracle as proof method *}
 
    53 
    53 
    54 method_setup iff = {*
 
    54 method_setup iff = {*
 
    55   Method.simple_args OuterParse.nat (fn n => fn ctxt =>
 
    55   Scan.lift OuterParse.nat >> (fn n => fn ctxt =>
 
    56     SIMPLE_METHOD
 
    56     SIMPLE_METHOD
 
    57       (HEADGOAL (Tactic.rtac (iff_oracle (ProofContext.theory_of ctxt, n)))
 
    57       (HEADGOAL (Tactic.rtac (iff_oracle (ProofContext.theory_of ctxt, n)))
 
    58         handle Fail _ => no_tac))
 
    58         handle Fail _ => no_tac))
 
    59 *} "iff oracle"
 
    59 *} "iff oracle"
 
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