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(* Title: HOL/Tools/refute_isar.ML
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ID: $Id$
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Author: Tjark Weber
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Copyright 2003-2007
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Adds the 'refute' and 'refute_params' commands to Isabelle/Isar's outer
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syntax.
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*)
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structure RefuteIsar =
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struct
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(* ------------------------------------------------------------------------- *)
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(* common functions for argument parsing/scanning *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* both 'refute' and 'refute_params' take an optional list of arguments of *)
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(* the form [name1=value1, name2=value2, ...] *)
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(* ------------------------------------------------------------------------- *)
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fun repeatd delim scan = scan -- Scan.repeat (OuterParse.$$$ delim |-- scan)
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>> op :: || Scan.succeed [];
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val scan_parm = OuterParse.name -- (OuterParse.$$$ "=" |-- OuterParse.name);
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val scan_parms = Scan.option
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(OuterParse.$$$ "[" |-- (repeatd "," scan_parm) --| OuterParse.$$$ "]");
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(* ------------------------------------------------------------------------- *)
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(* set up the 'refute' command *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* 'refute' takes an optional list of parameters, followed by an optional *)
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(* subgoal number *)
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(* ------------------------------------------------------------------------- *)
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val refute_scan_args = scan_parms -- (Scan.option OuterParse.nat);
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(* ------------------------------------------------------------------------- *)
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(* the 'refute' command is mapped to 'Refute.refute_subgoal' *)
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(* ------------------------------------------------------------------------- *)
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fun refute_trans args =
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Toplevel.keep (fn state =>
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let
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val (parms_opt, subgoal_opt) = args
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val parms = Option.getOpt (parms_opt, [])
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val subgoal = Option.getOpt (subgoal_opt, 1) - 1
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val thy = Toplevel.theory_of state
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val thm = (snd o snd) (Proof.get_goal (Toplevel.proof_of state))
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in
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Refute.refute_subgoal thy parms thm subgoal
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end);
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fun refute_parser tokens = (refute_scan_args tokens) |>> refute_trans;
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val refute_cmd = OuterSyntax.improper_command "refute"
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"try to find a model that refutes a given subgoal"
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OuterKeyword.diag refute_parser;
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(* ------------------------------------------------------------------------- *)
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(* set up the 'refute_params' command *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* 'refute_params' takes an optional list of parameters *)
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(* ------------------------------------------------------------------------- *)
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val refute_params_scan_args = scan_parms;
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(* ------------------------------------------------------------------------- *)
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(* the 'refute_params' command is mapped to (multiple calls of) *)
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(* 'Refute.set_default_param'; then the (new) default parameters are *)
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(* displayed *)
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(* ------------------------------------------------------------------------- *)
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fun refute_params_trans args =
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let
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fun add_params thy [] =
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thy
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| add_params thy (p::ps) =
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add_params (Refute.set_default_param p thy) ps
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in
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Toplevel.theory (fn thy =>
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let
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val thy' = add_params thy (getOpt (args, []))
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val new_default_params = Refute.get_default_params thy'
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val output = if new_default_params=[] then
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"none"
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else
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space_implode "\n" (map (fn (name, value) => name ^ "=" ^ value)
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new_default_params)
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in
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writeln ("Default parameters for 'refute':\n" ^ output);
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thy'
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end)
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end;
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fun refute_params_parser tokens =
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(refute_params_scan_args tokens) |>> refute_params_trans;
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val refute_params_cmd = OuterSyntax.command "refute_params"
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"show/store default parameters for the 'refute' command"
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OuterKeyword.thy_decl refute_params_parser;
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end;
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(* ------------------------------------------------------------------------- *)
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(* add the two new commands 'refute' and 'refute_params' to Isabelle/Isar's *)
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(* outer syntax *)
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(* ------------------------------------------------------------------------- *)
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OuterSyntax.add_parsers [RefuteIsar.refute_cmd, RefuteIsar.refute_params_cmd];
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