(* Title: HOL/Tools/refute_isar.ML
ID: $Id$
Author: Tjark Weber
Copyright 2003-2005
Adds the 'refute' and 'refute_params' commands to Isabelle/Isar's outer
syntax.
*)
structure RefuteIsar =
struct
(* ------------------------------------------------------------------------- *)
(* common functions for argument parsing/scanning *)
(* ------------------------------------------------------------------------- *)
(* ------------------------------------------------------------------------- *)
(* both 'refute' and 'refute_params' take an optional list of arguments of *)
(* the form [name1=value1, name2=value2, ...] *)
(* ------------------------------------------------------------------------- *)
fun repeatd delim scan = scan -- Scan.repeat (OuterParse.$$$ delim |-- scan) >> op :: || Scan.succeed [];
val scan_parm = (OuterParse.name -- (OuterParse.$$$ "=" |-- OuterParse.name));
val scan_parms = Scan.option (OuterParse.$$$ "[" |-- (repeatd "," scan_parm) --| OuterParse.$$$ "]");
(* ------------------------------------------------------------------------- *)
(* set up the 'refute' command *)
(* ------------------------------------------------------------------------- *)
(* ------------------------------------------------------------------------- *)
(* 'refute' takes an optional list of parameters, followed by an optional *)
(* subgoal number *)
(* ------------------------------------------------------------------------- *)
val refute_scan_args = scan_parms -- (Scan.option OuterParse.nat);
(* ------------------------------------------------------------------------- *)
(* the 'refute' command is mapped to 'Refute.refute_subgoal' *)
(* ------------------------------------------------------------------------- *)
fun refute_trans args =
Toplevel.keep
(fn state =>
(let
val (parms, subgoal) = args
val thy = Toplevel.theory_of state
val thm = (snd o snd) (Proof.get_goal (Toplevel.proof_of state))
in
Refute.refute_subgoal thy (getOpt (parms, [])) thm ((getOpt (subgoal, 1))-1)
end)
);
fun refute_parser tokens = (refute_scan_args tokens) |>> refute_trans;
val refute_cmd = OuterSyntax.improper_command "refute" "try to find a model that refutes a given subgoal" OuterKeyword.diag refute_parser;
(* ------------------------------------------------------------------------- *)
(* set up the 'refute_params' command *)
(* ------------------------------------------------------------------------- *)
(* ------------------------------------------------------------------------- *)
(* 'refute_params' takes an optional list of parameters *)
(* ------------------------------------------------------------------------- *)
val refute_params_scan_args = scan_parms;
(* ------------------------------------------------------------------------- *)
(* the 'refute_params' command is mapped to (multiple calls of) *)
(* 'Refute.set_default_param'; then the (new) default parameters are *)
(* displayed *)
(* ------------------------------------------------------------------------- *)
fun refute_params_trans args =
let
fun add_params (thy, []) = thy
| add_params (thy, p::ps) = add_params (Refute.set_default_param p thy, ps)
in
Toplevel.theory (fn thy =>
let
val thy' = add_params (thy, (getOpt (args, [])))
val new_default_params = Refute.get_default_params thy'
val output = if new_default_params=[] then "none" else (space_implode "\n" (map (fn (name,value) => name ^ "=" ^ value) new_default_params))
in
writeln ("Default parameters for 'refute':\n" ^ output);
thy'
end)
end;
fun refute_params_parser tokens = (refute_params_scan_args tokens) |>> refute_params_trans;
val refute_params_cmd = OuterSyntax.command "refute_params" "show/store default parameters for the 'refute' command" OuterKeyword.thy_decl refute_params_parser;
end;
(* ------------------------------------------------------------------------- *)
(* add the two new commands 'refute' and 'refute_params' to Isabelle/Isar's *)
(* outer syntax *)
(* ------------------------------------------------------------------------- *)
OuterSyntax.add_parsers [RefuteIsar.refute_cmd, RefuteIsar.refute_params_cmd];