src/Pure/Isar/proof.ML
author wenzelm
Wed, 31 Oct 2001 22:04:29 +0100
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theorem(_i): locale argument; contexts 0 and 1 in state now refer to theory and locale, respectively; unified export (no longer uses global "standard");
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(*  Title:      Pure/Isar/proof.ML
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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    License:    GPL (GNU GENERAL PUBLIC LICENSE)
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Proof states and methods.
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*)
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signature BASIC_PROOF =
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sig
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  val FINDGOAL: (int -> thm -> 'a Seq.seq) -> thm -> 'a Seq.seq
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  val HEADGOAL: (int -> thm -> 'a Seq.seq) -> thm -> 'a Seq.seq
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end;
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signature PROOF =
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sig
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  include BASIC_PROOF
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  type context
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  type state
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  exception STATE of string * state
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  val check_result: string -> state -> 'a Seq.seq -> 'a Seq.seq
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  val init_state: theory -> string option -> state
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  val context_of: state -> context
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  val theory_of: state -> theory
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  val sign_of: state -> Sign.sg
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  val warn_extra_tfrees: state -> state -> state
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  val reset_thms: string -> state -> state
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  val the_facts: state -> thm list
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  val the_fact: state -> thm
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  val get_goal: state -> context * (thm list * thm)
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  val goal_facts: (state -> thm list) -> state -> state
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  val use_facts: state -> state
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  val reset_facts: state -> state
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  val is_chain: state -> bool
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  val assert_forward: state -> state
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  val assert_forward_or_chain: state -> state
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  val assert_backward: state -> state
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  val assert_no_chain: state -> state
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  val enter_forward: state -> state
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  val show_hyps: bool ref
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  val pretty_thm: thm -> Pretty.T
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  val pretty_thms: thm list -> Pretty.T
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  val verbose: bool ref
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  val print_state: int -> state -> unit
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  val pretty_goals: bool -> state -> Pretty.T list
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  val level: state -> int
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  type method
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  val method: (thm list -> tactic) -> method
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  val method_cases: (thm list -> thm -> (thm * (string * RuleCases.T) list) Seq.seq) -> method
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  val refine: (context -> method) -> state -> state Seq.seq
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  val refine_end: (context -> method) -> state -> state Seq.seq
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  val match_bind: (string list * string) list -> state -> state
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  val match_bind_i: (term list * term) list -> state -> state
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  val let_bind: (string list * string) list -> state -> state
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  val let_bind_i: (term list * term) list -> state -> state
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  val simple_have_thms: string -> thm list -> state -> state
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  val have_thmss: ((string * context attribute list) *
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    (thm list * context attribute list) list) list -> state -> state
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  val with_thmss: ((string * context attribute list) *
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    (thm list * context attribute list) list) list -> state -> state
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  val fix: (string list * string option) list -> state -> state
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  val fix_i: (string list * typ option) list -> state -> state
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  val assm: ProofContext.exporter
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    -> ((string * context attribute list) * (string * (string list * string list)) list) list
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    -> state -> state
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  val assm_i: ProofContext.exporter
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    -> ((string * context attribute list) * (term * (term list * term list)) list) list
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    -> state -> state
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  val assume:
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    ((string * context attribute list) * (string * (string list * string list)) list) list
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    -> state -> state
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  val assume_i: ((string * context attribute list) * (term * (term list * term list)) list) list
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    -> state -> state
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  val presume:
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    ((string * context attribute list) * (string * (string list * string list)) list) list
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    -> state -> state
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  val presume_i: ((string * context attribute list) * (term * (term list * term list)) list) list
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    -> state -> state
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  val def: string -> context attribute list -> string *  (string * string list) -> state -> state
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  val def_i: string -> context attribute list -> string * (term * term list) -> state -> state
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  val invoke_case: string * string option list * context attribute list -> state -> state
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  val theorem: string -> string option -> bstring -> theory attribute list
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    -> string * (string list * string list) -> theory -> state
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  val theorem_i: string -> string option -> bstring -> theory attribute list
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    -> term * (term list * term list) -> theory -> state
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  val chain: state -> state
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  val from_facts: thm list -> state -> state
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  val show: (bool -> state -> state) -> (state -> state Seq.seq) -> string
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    -> context attribute list -> string * (string list * string list) -> bool -> state -> state
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  val show_i: (bool -> state -> state) -> (state -> state Seq.seq) -> string
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    -> context attribute list -> term * (term list * term list) -> bool -> state -> state
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  val have: (state -> state Seq.seq) -> string -> context attribute list
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    -> string * (string list * string list) -> state -> state
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  val have_i: (state -> state Seq.seq) -> string -> context attribute list
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    -> term * (term list * term list) -> state -> state
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  val at_bottom: state -> bool
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  val local_qed: (state -> state Seq.seq)
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    -> ({kind: string, name: string, thm: thm} -> unit) * (thm -> unit) -> state -> state Seq.seq
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  val global_qed: (state -> state Seq.seq) -> state
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    -> (theory * {kind: string, name: string, thm: thm}) Seq.seq
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  val begin_block: state -> state
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  val end_block: state -> state Seq.seq
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  val next_block: state -> state
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end;
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signature PRIVATE_PROOF =
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sig
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  include PROOF
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  val put_data: Object.kind -> ('a -> Object.T) -> 'a -> state -> state
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end;
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structure Proof: PRIVATE_PROOF =
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struct
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(** proof state **)
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type context = ProofContext.context;
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(* type goal *)
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datatype kind =
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  Theorem of string * string option * theory attribute list |    (*theorem with kind and locale*)
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  Show of context attribute list |               (*intermediate result, solving subgoal*)
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  Have of context attribute list;                (*intermediate result*)
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val kind_name =
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  fn Theorem (s, None, _) => s
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   | Theorem (s, Some loc, _) => s ^ " (in " ^ loc ^ ")"    (* FIXME cond_extern *)
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   | Show _ => "show"
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   | Have _ => "have";
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type goal =
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 (kind *        (*result kind*)
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  string *      (*result name*)
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  term) *       (*result statement*)
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 (thm list *    (*use facts*)
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  thm);         (*goal: subgoals ==> statement*)
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(* type mode *)
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datatype mode = Forward | ForwardChain | Backward;
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val mode_name = (fn Forward => "state" | ForwardChain => "chain" | Backward => "prove");
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(* datatype state *)
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datatype node =
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  Node of
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   {context: context,
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    facts: thm list option,
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    mode: mode,
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    goal: (goal * (state -> state Seq.seq)) option}
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and state =
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  State of
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    node *              (*current*)
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    node list;          (*parents wrt. block structure*)
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fun make_node (context, facts, mode, goal) =
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  Node {context = context, facts = facts, mode = mode, goal = goal};
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exception STATE of string * state;
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fun err_malformed name state =
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  raise STATE (name ^ ": internal error -- malformed proof state", state);
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fun check_result msg state sq =
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  (case Seq.pull sq of
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    None => raise STATE (msg, state)
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  | Some s_sq => Seq.cons s_sq);
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fun map_current f (State (Node {context, facts, mode, goal}, nodes)) =
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  State (make_node (f (context, facts, mode, goal)), nodes);
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(** basic proof state operations **)
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(* context *)
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fun context_of (State (Node {context, ...}, _)) = context;
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val theory_of = ProofContext.theory_of o context_of;
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val sign_of = ProofContext.sign_of o context_of;
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fun map_context f = map_current (fn (ctxt, facts, mode, goal) => (f ctxt, facts, mode, goal));
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fun map_context_result f (state as State (Node {context, facts, mode, goal}, nodes)) =
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  let val (context', result) = f context
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  in (State (make_node (context', facts, mode, goal), nodes), result) end;
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fun put_data kind f = map_context o ProofContext.put_data kind f;
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val warn_extra_tfrees = map_context o ProofContext.warn_extra_tfrees o context_of;
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val add_binds_i = map_context o ProofContext.add_binds_i;
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val auto_bind_goal = map_context o ProofContext.auto_bind_goal;
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val auto_bind_facts = map_context oo ProofContext.auto_bind_facts;
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val put_thms = map_context o ProofContext.put_thms;
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val put_thmss = map_context o ProofContext.put_thmss;
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val reset_thms = map_context o ProofContext.reset_thms;
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val assumptions = ProofContext.assumptions o context_of;
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val get_case = ProofContext.get_case o context_of;
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(* facts *)
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fun the_facts (State (Node {facts = Some facts, ...}, _)) = facts
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  | the_facts state = raise STATE ("No current facts available", state);
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fun the_fact state =
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  (case the_facts state of
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    [thm] => thm
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  | _ => raise STATE ("Single fact expected", state));
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fun assert_facts state = (the_facts state; state);
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fun get_facts (State (Node {facts, ...}, _)) = facts;
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val thisN = "this";
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fun put_facts facts state =
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  state
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  |> map_current (fn (ctxt, _, mode, goal) => (ctxt, facts, mode, goal))
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  |> (case facts of None => reset_thms thisN | Some ths => put_thms (thisN, ths));
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val reset_facts = put_facts None;
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fun these_factss (state, named_factss) =
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  state
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  |> put_thmss named_factss
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  |> put_facts (Some (flat (map #2 named_factss)));
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(* goal *)
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local
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  fun find i (state as State (Node {goal = Some goal, ...}, _)) = (context_of state, (i, goal))
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    | find i (State (Node {goal = None, ...}, node :: nodes)) = find (i + 1) (State (node, nodes))
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    | find _ (state as State (_, [])) = err_malformed "find_goal" state;
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in val find_goal = find 0 end;
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fun get_goal state =
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  let val (ctxt, (_, ((_, x), _))) = find_goal state
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  in (ctxt, x) end;
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fun put_goal goal = map_current (fn (ctxt, facts, mode, _) => (ctxt, facts, mode, goal));
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fun map_goal f g (State (Node {context, facts, mode, goal = Some goal}, nodes)) =
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      State (make_node (f context, facts, mode, Some (g goal)), nodes)
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  | map_goal f g (State (nd, node :: nodes)) =
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      let val State (node', nodes') = map_goal f g (State (node, nodes))
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      in map_context f (State (nd, node' :: nodes')) end
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  | map_goal _ _ state = state;
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fun goal_facts get state =
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  state
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  |> map_goal I (fn ((result, (_, thm)), f) => ((result, (get state, thm)), f));
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fun use_facts state =
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  state
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  |> goal_facts the_facts
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  |> reset_facts;
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(* mode *)
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fun get_mode (State (Node {mode, ...}, _)) = mode;
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fun put_mode mode = map_current (fn (ctxt, facts, _, goal) => (ctxt, facts, mode, goal));
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val enter_forward = put_mode Forward;
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val enter_forward_chain = put_mode ForwardChain;
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val enter_backward = put_mode Backward;
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fun assert_mode pred state =
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  let val mode = get_mode state in
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    if pred mode then state
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    else raise STATE ("Illegal application of proof command in "
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      ^ quote (mode_name mode) ^ " mode", state)
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  end;
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fun is_chain state = get_mode state = ForwardChain;
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val assert_forward = assert_mode (equal Forward);
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val assert_forward_or_chain = assert_mode (equal Forward orf equal ForwardChain);
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val assert_backward = assert_mode (equal Backward);
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val assert_no_chain = assert_mode (not_equal ForwardChain);
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(* blocks *)
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fun level (State (_, nodes)) = length nodes;
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fun open_block (State (node, nodes)) = State (node, node :: nodes);
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fun new_block state =
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  state
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  |> open_block
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  |> put_goal None;
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fun close_block (state as State (_, node :: nodes)) = State (node, nodes)
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  | close_block state = raise STATE ("Unbalanced block parentheses", state);
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(* init_state *)
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e1d4df962ac9 theorem(_i): locale argument;
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fun init_state thy locale =  (* FIXME locale unused *)
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  State (make_node (ProofContext.init thy, None, Forward, None), [])
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  |> open_block |> open_block;
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e1d4df962ac9 theorem(_i): locale argument;
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(** print_state **)
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val show_hyps = ProofContext.show_hyps;
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val pretty_thm = ProofContext.pretty_thm;
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fun pretty_thms [th] = pretty_thm th
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  | pretty_thms ths = Pretty.blk (0, Pretty.fbreaks (map pretty_thm ths));
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val verbose = ProofContext.verbose;
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fun pretty_facts _ None = []
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  | pretty_facts s (Some ths) =
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      [Pretty.big_list (s ^ "this:") (map pretty_thm ths), Pretty.str ""];
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fun print_state nr (state as State (Node {context, facts, mode, goal = _}, nodes)) =
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  let
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    val ref (_, _, begin_goal) = Display.current_goals_markers;
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    fun levels_up 0 = ""
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diff changeset
   334
      | levels_up 1 = ", 1 level up"
e1e2d07287d8 improved output;
wenzelm
parents: 7556
diff changeset
   335
      | levels_up i = ", " ^ string_of_int i ^ " levels up";
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   336
11556
8e0768929662 print_state: subgoals;
wenzelm
parents: 11549
diff changeset
   337
    fun subgoals 0 = ""
8e0768929662 print_state: subgoals;
wenzelm
parents: 11549
diff changeset
   338
      | subgoals 1 = ", 1 subgoal"
8e0768929662 print_state: subgoals;
wenzelm
parents: 11549
diff changeset
   339
      | subgoals n = ", " ^ string_of_int n ^ " subgoals";
8e0768929662 print_state: subgoals;
wenzelm
parents: 11549
diff changeset
   340
      
8462
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   341
    fun pretty_goal (_, (i, (((kind, name, _), (goal_facts, thm)), _))) =
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   342
      pretty_facts "using "
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   343
        (if mode <> Backward orelse null goal_facts then None else Some goal_facts) @
11556
8e0768929662 print_state: subgoals;
wenzelm
parents: 11549
diff changeset
   344
      [Pretty.str ("goal (" ^ kind_name kind ^
8e0768929662 print_state: subgoals;
wenzelm
parents: 11549
diff changeset
   345
          (if name = "" then "" else " " ^ name) ^
8e0768929662 print_state: subgoals;
wenzelm
parents: 11549
diff changeset
   346
            levels_up (i div 2) ^ subgoals (Thm.nprems_of thm) ^ "):")] @
11891
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   347
      Display.pretty_goals_marker begin_goal (! goals_limit) thm;
6848
3d82756e1af5 tuned print_state;
wenzelm
parents: 6798
diff changeset
   348
8462
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   349
    val ctxt_prts =
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   350
      if ! verbose orelse mode = Forward then ProofContext.pretty_context context
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   351
      else if mode = Backward then ProofContext.pretty_prems context
7575
e1e2d07287d8 improved output;
wenzelm
parents: 7556
diff changeset
   352
      else [];
8462
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   353
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   354
    val prts =
8582
3051aa8aa412 tuned output;
wenzelm
parents: 8561
diff changeset
   355
     [Pretty.str ("proof (" ^ mode_name mode ^ "): step " ^ string_of_int nr ^
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   356
        (if ! verbose then ", depth " ^ string_of_int (length nodes div 2 - 1)
8561
2675e2f4dc61 tuned output;
wenzelm
parents: 8542
diff changeset
   357
        else "")), Pretty.str ""] @
8462
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   358
     (if null ctxt_prts then [] else ctxt_prts @ [Pretty.str ""]) @
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   359
     (if ! verbose orelse mode = Forward then
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   360
       (pretty_facts "" facts @ pretty_goal (find_goal state))
8462
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   361
      else if mode = ForwardChain then pretty_facts "picking " facts
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   362
      else pretty_goal (find_goal state))
8462
7f4e4e875c13 pretty chunks;
wenzelm
parents: 8450
diff changeset
   363
  in Pretty.writeln (Pretty.chunks prts) end;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   364
10360
807992b67edd tuned goals output;
wenzelm
parents: 10350
diff changeset
   365
fun pretty_goals main_goal state =
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   366
  let val (_, (_, ((_, (_, thm)), _))) = find_goal state
11891
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   367
  in Display.pretty_sub_goals main_goal (! goals_limit) thm end;
10320
26d4b84eb047 added pretty_goals;
wenzelm
parents: 9482
diff changeset
   368
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   369
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   370
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   371
(** proof steps **)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   372
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   373
(* datatype method *)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   374
8374
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   375
datatype method =
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   376
  Method of thm list -> thm -> (thm * (string * RuleCases.T) list) Seq.seq;
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   377
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   378
fun method tac = Method (fn facts => fn st => Seq.map (rpair []) (tac facts st));
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   379
val method_cases = Method;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   380
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   381
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   382
(* refine goal *)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   383
8234
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   384
local
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   385
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   386
fun check_sign sg state =
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   387
  if Sign.subsig (sg, sign_of state) then state
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   388
  else raise STATE ("Bad signature of result: " ^ Sign.str_of_sg sg, state);
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   389
8234
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   390
fun gen_refine current_context meth_fun state =
6848
3d82756e1af5 tuned print_state;
wenzelm
parents: 6798
diff changeset
   391
  let
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   392
    val (goal_ctxt, (_, ((result, (facts, thm)), f))) = find_goal state;
8234
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   393
    val Method meth = meth_fun (if current_context then context_of state else goal_ctxt);
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   394
8374
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   395
    fun refn (thm', cases) =
6848
3d82756e1af5 tuned print_state;
wenzelm
parents: 6798
diff changeset
   396
      state
3d82756e1af5 tuned print_state;
wenzelm
parents: 6798
diff changeset
   397
      |> check_sign (Thm.sign_of_thm thm')
8374
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   398
      |> map_goal (ProofContext.add_cases cases) (K ((result, (facts, thm')), f));
6848
3d82756e1af5 tuned print_state;
wenzelm
parents: 6798
diff changeset
   399
  in Seq.map refn (meth facts thm) end;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   400
8234
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   401
in
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   402
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   403
val refine = gen_refine true;
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   404
val refine_end = gen_refine false;
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   405
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   406
end;
36a85a6c4852 refine_end;
wenzelm
parents: 8206
diff changeset
   407
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   408
11917
9a0a736d820b moved RANGE to tctical.ML;
wenzelm
parents: 11906
diff changeset
   409
(* goal addressing *)
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   410
8152
ce3387fafebb replaced FIRSTGOAL by FINDGOAL (backtracking!);
wenzelm
parents: 8095
diff changeset
   411
fun FINDGOAL tac st =
8374
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   412
  let fun find (i, n) = if i > n then Seq.fail else Seq.APPEND (tac i, find (i + 1, n))
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   413
  in find (1, Thm.nprems_of st) st end;
8152
ce3387fafebb replaced FIRSTGOAL by FINDGOAL (backtracking!);
wenzelm
parents: 8095
diff changeset
   414
8166
97414b447a02 added HEADGOAL;
wenzelm
parents: 8152
diff changeset
   415
fun HEADGOAL tac = tac 1;
97414b447a02 added HEADGOAL;
wenzelm
parents: 8152
diff changeset
   416
9469
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   417
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   418
(* export results *)
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   419
11816
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   420
fun refine_tac rule =
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   421
  Tactic.rtac rule THEN_ALL_NEW (SUBGOAL (fn (goal, i) =>
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   422
    if can Logic.dest_goal (Logic.strip_assums_concl goal) then
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   423
      Tactic.etac Drule.triv_goal i
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   424
    else all_tac));
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   425
6982
4d2a3f35af93 added show_hyps flag;
wenzelm
parents: 6950
diff changeset
   426
fun export_goal print_rule raw_rule inner state =
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   427
  let
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   428
    val (outer, (_, ((result, (facts, thm)), f))) = find_goal state;
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   429
    val exp_tac = ProofContext.export true inner outer;
9469
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   430
    fun exp_rule rule =
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   431
      let
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   432
        val _ = print_rule rule;
11816
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   433
        val thmq = FINDGOAL (refine_tac rule) thm;
9469
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   434
      in Seq.map (fn th => map_goal I (K ((result, (facts, th)), f)) state) thmq end;
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   435
  in raw_rule |> exp_tac |> (Seq.flat o Seq.map exp_rule) end;
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   436
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   437
fun transfer_facts inner_state state =
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   438
  (case get_facts inner_state of
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   439
    None => Seq.single (reset_facts state)
8617
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   440
  | Some thms =>
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   441
      let
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   442
        val exp_tac = ProofContext.export false (context_of inner_state) (context_of state);
11816
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   443
        val thmqs = map exp_tac thms;
8617
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   444
      in Seq.map (fn ths => put_facts (Some ths) state) (Seq.commute thmqs) end);
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   445
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   446
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   447
(* prepare result *)
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   448
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   449
fun prep_result state t raw_thm =
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   450
  let
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   451
    val ctxt = context_of state;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   452
    fun err msg = raise STATE (msg, state);
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   453
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   454
    val ngoals = Thm.nprems_of raw_thm;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   455
    val _ =
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   456
      if ngoals = 0 then ()
11891
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   457
      else (Display.print_goals ngoals raw_thm; err (string_of_int ngoals ^ " unsolved goal(s)!"));
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   458
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   459
    val thm = raw_thm RS Drule.rev_triv_goal;
8617
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   460
    val {hyps, prop, sign, ...} = Thm.rep_thm thm;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   461
    val tsig = Sign.tsig_of sign;
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   462
9469
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   463
    val casms = flat (map #1 (assumptions state));
11816
545aab7410ac simplified exporter interface;
wenzelm
parents: 11793
diff changeset
   464
    val bad_hyps = Library.gen_rems Term.aconv (hyps, map Thm.term_of casms);
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   465
  in
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   466
    if not (null bad_hyps) then
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   467
      err ("Additional hypotheses:\n" ^ cat_lines (map (Sign.string_of_term sign) bad_hyps))
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   468
    else if not (Pattern.matches (Sign.tsig_of (sign_of state)) (t, prop)) then
7605
8bbfcb54054e added reset_thms;
wenzelm
parents: 7580
diff changeset
   469
      err ("Proved a different theorem: " ^ Sign.string_of_term sign prop)
8617
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   470
    else thm
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   471
  end;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   472
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   473
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   474
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   475
(*** structured proof commands ***)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   476
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   477
(** context **)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   478
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   479
(* bind *)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   480
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   481
fun gen_bind f x state =
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   482
  state
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   483
  |> assert_forward
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   484
  |> map_context (f x)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   485
  |> reset_facts;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   486
8617
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   487
val match_bind = gen_bind (ProofContext.match_bind false);
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   488
val match_bind_i = gen_bind (ProofContext.match_bind_i false);
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   489
val let_bind = gen_bind (ProofContext.match_bind true);
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   490
val let_bind_i = gen_bind (ProofContext.match_bind_i true);
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   491
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   492
9196
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   493
(* have_thmss etc. *)
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   494
9196
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   495
fun have_thmss args state =
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   496
  state
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   497
  |> assert_forward
9196
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   498
  |> map_context_result (ProofContext.have_thmss args)
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   499
  |> these_factss;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   500
9196
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   501
fun simple_have_thms name thms = have_thmss [((name, []), [(thms, [])])];
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   502
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   503
fun with_thmss args state =
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   504
  let val state' = state |> have_thmss args
1f6f66fe777a facts: handle multiple lists of arguments;
wenzelm
parents: 8991
diff changeset
   505
  in state' |> simple_have_thms "" (the_facts state' @ the_facts state) end;
6876
4ae9c47f2b6b have_thmss: more_ths;
wenzelm
parents: 6871
diff changeset
   506
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   507
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   508
(* fix *)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   509
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   510
fun gen_fix f xs state =
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   511
  state
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   512
  |> assert_forward
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   513
  |> map_context (f xs)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   514
  |> reset_facts;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   515
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   516
val fix = gen_fix ProofContext.fix;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   517
val fix_i = gen_fix ProofContext.fix_i;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   518
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   519
11891
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   520
(* assume and presume *)
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   521
9469
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   522
fun gen_assume f exp args state =
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   523
  state
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   524
  |> assert_forward
9469
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   525
  |> map_context_result (f exp args)
11924
b6def266cbb9 simplified ProofContext.assume interface;
wenzelm
parents: 11917
diff changeset
   526
  |> these_factss;
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   527
7271
442456b2a8bb assume: multiple args;
wenzelm
parents: 7201
diff changeset
   528
val assm = gen_assume ProofContext.assume;
442456b2a8bb assume: multiple args;
wenzelm
parents: 7201
diff changeset
   529
val assm_i = gen_assume ProofContext.assume_i;
11917
9a0a736d820b moved RANGE to tctical.ML;
wenzelm
parents: 11906
diff changeset
   530
val assume = assm ProofContext.export_assume;
9a0a736d820b moved RANGE to tctical.ML;
wenzelm
parents: 11906
diff changeset
   531
val assume_i = assm_i ProofContext.export_assume;
9a0a736d820b moved RANGE to tctical.ML;
wenzelm
parents: 11906
diff changeset
   532
val presume = assm ProofContext.export_presume;
9a0a736d820b moved RANGE to tctical.ML;
wenzelm
parents: 11906
diff changeset
   533
val presume_i = assm_i ProofContext.export_presume;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   534
7271
442456b2a8bb assume: multiple args;
wenzelm
parents: 7201
diff changeset
   535
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   536
11891
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   537
(** local definitions **)
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   538
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   539
fun gen_def fix prep_term prep_pats raw_name atts (x, (raw_rhs, raw_pats)) state =
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   540
  let
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   541
    val _ = assert_forward state;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   542
    val ctxt = context_of state;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   543
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   544
    (*rhs*)
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   545
    val name = if raw_name = "" then Thm.def_name x else raw_name;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   546
    val rhs = prep_term ctxt raw_rhs;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   547
    val T = Term.fastype_of rhs;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   548
    val pats = prep_pats T (ProofContext.declare_term rhs ctxt) raw_pats;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   549
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   550
    (*lhs*)
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   551
    val lhs = ProofContext.bind_skolem ctxt [x] (Free (x, T));
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   552
  in
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   553
    state
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   554
    |> fix [([x], None)]
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   555
    |> match_bind_i [(pats, rhs)]
11917
9a0a736d820b moved RANGE to tctical.ML;
wenzelm
parents: 11906
diff changeset
   556
    |> assm_i ProofContext.export_def [((name, atts), [(Logic.mk_equals (lhs, rhs), ([], []))])]
11891
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   557
  end;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   558
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   559
val def = gen_def fix ProofContext.read_term ProofContext.read_term_pats;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   560
val def_i = gen_def fix_i ProofContext.cert_term ProofContext.cert_term_pats;
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   561
99569e5f0ab5 moved local defs to proof.ML (for locales);
wenzelm
parents: 11816
diff changeset
   562
8374
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   563
(* invoke_case *)
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   564
11793
5f0ab6f5c280 support impromptu terminology of cases parameters;
wenzelm
parents: 11742
diff changeset
   565
fun invoke_case (name, xs, atts) state =
9292
c5875175751f invoke_case: bind_skolem;
wenzelm
parents: 9196
diff changeset
   566
  let
10830
d19f9f4c35ee avoid renaming of params in cases;
wenzelm
parents: 10809
diff changeset
   567
    val (state', (lets, asms)) =
11793
5f0ab6f5c280 support impromptu terminology of cases parameters;
wenzelm
parents: 11742
diff changeset
   568
      map_context_result (ProofContext.apply_case (get_case state name xs)) state;
9292
c5875175751f invoke_case: bind_skolem;
wenzelm
parents: 9196
diff changeset
   569
  in
10830
d19f9f4c35ee avoid renaming of params in cases;
wenzelm
parents: 10809
diff changeset
   570
    state'
10809
e827c779ae2e moved norm_hhf_tac to Pure/tactic.ML;
wenzelm
parents: 10553
diff changeset
   571
    |> add_binds_i lets
10830
d19f9f4c35ee avoid renaming of params in cases;
wenzelm
parents: 10809
diff changeset
   572
    |> assume_i [((name, atts), map (rpair ([], [])) asms)]
8374
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   573
  end;
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   574
ffb2eb084078 generalized FINDGOAL, HEADGOAL;
wenzelm
parents: 8239
diff changeset
   575
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   576
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   577
(** goals **)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   578
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   579
(* forward chaining *)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   580
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   581
fun chain state =
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   582
  state
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   583
  |> assert_forward
6848
3d82756e1af5 tuned print_state;
wenzelm
parents: 6798
diff changeset
   584
  |> assert_facts
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   585
  |> enter_forward_chain;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   586
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   587
fun from_facts facts state =
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   588
  state
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   589
  |> put_facts (Some facts)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   590
  |> chain;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   591
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   592
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   593
(* setup goals *)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   594
11549
e7265e70fd7c renamed "antecedent" case to "rule_context";
wenzelm
parents: 11525
diff changeset
   595
val rule_contextN = "rule_context";
8991
dc70b797827f case 'antecedent';
wenzelm
parents: 8807
diff changeset
   596
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   597
fun setup_goal opt_block prepp autofix kind after_qed name raw_propp state =
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   598
  let
10464
b7b916a82dca tuned statement args;
wenzelm
parents: 10446
diff changeset
   599
    val (state', ([[prop]], gen_binds)) =
5936
406eb27fe53c match_bind(_i): 'as' patterns;
wenzelm
parents: 5918
diff changeset
   600
      state
406eb27fe53c match_bind(_i): 'as' patterns;
wenzelm
parents: 5918
diff changeset
   601
      |> assert_forward_or_chain
406eb27fe53c match_bind(_i): 'as' patterns;
wenzelm
parents: 5918
diff changeset
   602
      |> enter_forward
8617
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   603
      |> opt_block
10464
b7b916a82dca tuned statement args;
wenzelm
parents: 10446
diff changeset
   604
      |> map_context_result (fn ct => prepp (ct, [[raw_propp]]));
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   605
    val cprop = Thm.cterm_of (sign_of state') prop;
7556
f3e78ebcf6ba setup_goal: do not insert assumptions;
wenzelm
parents: 7487
diff changeset
   606
    val goal = Drule.mk_triv_goal cprop;
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   607
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   608
    val tvars = Term.term_tvars prop;
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   609
    val vars = Term.term_vars prop;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   610
  in
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   611
    if null tvars then ()
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   612
    else raise STATE ("Goal statement contains illegal schematic type variable(s): " ^
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   613
      commas (map (Syntax.string_of_vname o #1) tvars), state);
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   614
    if null vars then ()
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   615
    else warning ("Goal statement contains unbound schematic variable(s): " ^
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   616
      commas (map (Sign.string_of_term (sign_of state)) vars));
5936
406eb27fe53c match_bind(_i): 'as' patterns;
wenzelm
parents: 5918
diff changeset
   617
    state'
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   618
    |> map_context (autofix prop)
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   619
    |> put_goal (Some (((kind, name, prop), ([], goal)), after_qed o map_context gen_binds))
11549
e7265e70fd7c renamed "antecedent" case to "rule_context";
wenzelm
parents: 11525
diff changeset
   620
    |> map_context (ProofContext.add_cases (RuleCases.make true goal [rule_contextN]))
6790
0a39f22f847a auto_bind_goal, auto_bind_facts;
wenzelm
parents: 6776
diff changeset
   621
    |> auto_bind_goal prop
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   622
    |> (if is_chain state then use_facts else reset_facts)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   623
    |> new_block
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   624
    |> enter_backward
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   625
  end;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   626
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   627
fun autofix_frees t =
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   628
  let val frees = foldl_aterms (fn (vs, Free v) => v ins vs | (vs, _) => vs) ([], t)
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   629
  in ProofContext.fix_direct (map (fn (x, T) => ([x], Some T)) frees) end;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   630
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   631
(*global goals*)
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   632
fun global_goal prepp kind locale name atts x thy =
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   633
  setup_goal I prepp autofix_frees (Theorem (kind, locale, atts))
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   634
    Seq.single name x (init_state thy locale);
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   635
11742
44034a6474e5 generic theorem kinds;
wenzelm
parents: 11556
diff changeset
   636
val theorem = global_goal ProofContext.bind_propp_schematic;
44034a6474e5 generic theorem kinds;
wenzelm
parents: 11556
diff changeset
   637
val theorem_i = global_goal ProofContext.bind_propp_schematic_i;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   638
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   639
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   640
(*local goals*)
10938
2c85f2416c1b made SML/XL happy;
wenzelm
parents: 10936
diff changeset
   641
fun local_goal' prepp kind (check: bool -> state -> state)
2c85f2416c1b made SML/XL happy;
wenzelm
parents: 10936
diff changeset
   642
    f name atts args int state =
7928
06a11f8cf573 improved handling of warn_extra_tfrees;
wenzelm
parents: 7924
diff changeset
   643
  state
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   644
  |> setup_goal open_block prepp (K I) (kind atts) f name args
10936
a0dc597d9173 show(_i): check goal;
wenzelm
parents: 10830
diff changeset
   645
  |> warn_extra_tfrees state
a0dc597d9173 show(_i): check goal;
wenzelm
parents: 10830
diff changeset
   646
  |> check int;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   647
10936
a0dc597d9173 show(_i): check goal;
wenzelm
parents: 10830
diff changeset
   648
fun local_goal prepp kind f name atts args =
a0dc597d9173 show(_i): check goal;
wenzelm
parents: 10830
diff changeset
   649
  local_goal' prepp kind (K I) f name atts args false;
a0dc597d9173 show(_i): check goal;
wenzelm
parents: 10830
diff changeset
   650
a0dc597d9173 show(_i): check goal;
wenzelm
parents: 10830
diff changeset
   651
val show = local_goal' ProofContext.bind_propp Show;
a0dc597d9173 show(_i): check goal;
wenzelm
parents: 10830
diff changeset
   652
val show_i = local_goal' ProofContext.bind_propp_i Show;
a0dc597d9173 show(_i): check goal;
wenzelm
parents: 10830
diff changeset
   653
val have = local_goal ProofContext.bind_propp Have;
10380
e5370304d893 tuned names;
wenzelm
parents: 10360
diff changeset
   654
val have_i = local_goal ProofContext.bind_propp_i Have;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   655
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   656
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   657
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   658
(** conclusions **)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   659
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   660
(* current goal *)
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   661
7176
a329a37ed91a local goals: after_qed;
wenzelm
parents: 7011
diff changeset
   662
fun current_goal (State (Node {context, goal = Some goal, ...}, _)) = (context, goal)
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   663
  | current_goal state = raise STATE ("No current goal!", state);
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   664
7176
a329a37ed91a local goals: after_qed;
wenzelm
parents: 7011
diff changeset
   665
fun assert_current_goal true (state as State (Node {goal = None, ...}, _)) =
6404
2daaf2943c79 common qed and end of proofs;
wenzelm
parents: 6262
diff changeset
   666
      raise STATE ("No goal in this block!", state)
7176
a329a37ed91a local goals: after_qed;
wenzelm
parents: 7011
diff changeset
   667
  | assert_current_goal false (state as State (Node {goal = Some _, ...}, _)) =
6404
2daaf2943c79 common qed and end of proofs;
wenzelm
parents: 6262
diff changeset
   668
      raise STATE ("Goal present in this block!", state)
2daaf2943c79 common qed and end of proofs;
wenzelm
parents: 6262
diff changeset
   669
  | assert_current_goal _ state = state;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   670
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   671
fun assert_bottom b (state as State (_, nodes)) =
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   672
  let val bot = (length nodes <= 2) in
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   673
    if b andalso not bot then raise STATE ("Not at bottom of proof!", state)
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   674
    else if not b andalso bot then raise STATE ("Already at bottom of proof!", state)
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   675
    else state
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   676
  end;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   677
6404
2daaf2943c79 common qed and end of proofs;
wenzelm
parents: 6262
diff changeset
   678
val at_bottom = can (assert_bottom true o close_block);
2daaf2943c79 common qed and end of proofs;
wenzelm
parents: 6262
diff changeset
   679
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   680
fun end_proof bot state =
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   681
  state
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   682
  |> assert_forward
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   683
  |> close_block
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   684
  |> assert_bottom bot
7011
7e8e9a26ba2c export init_state;
wenzelm
parents: 6996
diff changeset
   685
  |> assert_current_goal true
7e8e9a26ba2c export init_state;
wenzelm
parents: 6996
diff changeset
   686
  |> goal_facts (K []);
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   687
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   688
6404
2daaf2943c79 common qed and end of proofs;
wenzelm
parents: 6262
diff changeset
   689
(* local_qed *)
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   690
6982
4d2a3f35af93 added show_hyps flag;
wenzelm
parents: 6950
diff changeset
   691
fun finish_local (print_result, print_rule) state =
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   692
  let
8617
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   693
    val (goal_ctxt, (((kind, name, t), (_, raw_thm)), after_qed)) = current_goal state;
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   694
    val outer_state = state |> close_block;
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   695
    val outer_ctxt = context_of outer_state;
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   696
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   697
    val result = prep_result state t raw_thm;
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   698
    val resultq = ProofContext.export false goal_ctxt outer_ctxt result;
9469
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   699
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   700
    val (atts, opt_solve) =
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   701
      (case kind of
10380
e5370304d893 tuned names;
wenzelm
parents: 10360
diff changeset
   702
        Show atts => (atts, export_goal print_rule result goal_ctxt)
e5370304d893 tuned names;
wenzelm
parents: 10360
diff changeset
   703
      | Have atts => (atts, Seq.single)
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   704
      | _ => err_malformed "finish_local" state);
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   705
  in
6731
57e761134c85 cleaned comments;
wenzelm
parents: 6683
diff changeset
   706
    print_result {kind = kind_name kind, name = name, thm = result};
8617
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   707
    outer_state
33e2bd53aec3 support Hindley-Milner polymorphisms in binds and facts;
wenzelm
parents: 8582
diff changeset
   708
    |> auto_bind_facts name [ProofContext.generalize goal_ctxt outer_ctxt t]
9469
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   709
    |> (fn st => Seq.map (fn res =>
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   710
      have_thmss [((name, atts), [Thm.no_attributes [res]])] st) resultq)
8058d285b1cd export RANGE, hard_asm_tac, soft_asm_tac;
wenzelm
parents: 9292
diff changeset
   711
    |> (Seq.flat o Seq.map opt_solve)
7176
a329a37ed91a local goals: after_qed;
wenzelm
parents: 7011
diff changeset
   712
    |> (Seq.flat o Seq.map after_qed)
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   713
  end;
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   714
6982
4d2a3f35af93 added show_hyps flag;
wenzelm
parents: 6950
diff changeset
   715
fun local_qed finalize print state =
6404
2daaf2943c79 common qed and end of proofs;
wenzelm
parents: 6262
diff changeset
   716
  state
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   717
  |> end_proof false
6871
01866edde713 added check_result;
wenzelm
parents: 6853
diff changeset
   718
  |> finalize
6982
4d2a3f35af93 added show_hyps flag;
wenzelm
parents: 6950
diff changeset
   719
  |> (Seq.flat o Seq.map (finish_local print));
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   720
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   721
6404
2daaf2943c79 common qed and end of proofs;
wenzelm
parents: 6262
diff changeset
   722
(* global_qed *)
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   723
6950
ab6d35b7283f global_qed: removed alt_name, alt_att;
wenzelm
parents: 6932
diff changeset
   724
fun finish_global state =
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   725
  let
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   726
    val (goal_ctxt, (((kind, name, t), (_, raw_thm)), _)) = current_goal state;
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   727
    val full_name = if name = "" then "" else Sign.full_name (sign_of state) name;
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   728
    val locale_context = context_of (state |> close_block);  (* FIXME unused *)
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   729
    val theory_context = context_of (state |> close_block |> close_block);
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   730
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   731
    val result = prep_result state t raw_thm;
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   732
    val resultq =
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   733
      ProofContext.export false goal_ctxt theory_context result
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   734
      |> Seq.map Drule.local_standard;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   735
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   736
    val (atts, opt_locale) =
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   737
      (case kind of Theorem (s, loc, atts) => (atts @ [Drule.kind s], loc)
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   738
      | _ => err_malformed "finish_global" state);
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   739
    val thy = theory_of state;
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   740
  in
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   741
    resultq |> Seq.map (fn res =>
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   742
      let val (thy', res') = PureThy.store_thm ((name, res), atts) thy
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   743
      in (thy', {kind = kind_name kind, name = name, thm = res'}) end)
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   744
  end;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   745
10553
7f239ef89c50 removed get_goal;
wenzelm
parents: 10508
diff changeset
   746
(*note: clients should inspect first result only, as backtracking may destroy theory*)
6950
ab6d35b7283f global_qed: removed alt_name, alt_att;
wenzelm
parents: 6932
diff changeset
   747
fun global_qed finalize state =
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   748
  state
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   749
  |> end_proof true
6871
01866edde713 added check_result;
wenzelm
parents: 6853
diff changeset
   750
  |> finalize
12010
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   751
  |> Seq.map finish_global
e1d4df962ac9 theorem(_i): locale argument;
wenzelm
parents: 12000
diff changeset
   752
  |> Seq.flat;
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   753
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   754
6896
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   755
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   756
(** blocks **)
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   757
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   758
(* begin_block *)
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   759
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   760
fun begin_block state =
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   761
  state
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   762
  |> assert_forward
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   763
  |> new_block
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   764
  |> open_block;
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   765
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   766
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   767
(* end_block *)
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   768
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   769
fun end_block state =
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   770
  state
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   771
  |> assert_forward
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   772
  |> close_block
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   773
  |> assert_current_goal false
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   774
  |> close_block
6932
77c14313af51 propp: 'concl' patterns;
wenzelm
parents: 6896
diff changeset
   775
  |> transfer_facts state;
6896
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   776
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   777
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   778
(* next_block *)
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   779
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   780
fun next_block state =
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   781
  state
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   782
  |> assert_forward
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   783
  |> close_block
8718
3ba75b7e1168 next_block: reset_facts;
wenzelm
parents: 8670
diff changeset
   784
  |> new_block
3ba75b7e1168 next_block: reset_facts;
wenzelm
parents: 8670
diff changeset
   785
  |> reset_facts;
6896
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   786
4bdc3600ddae close_block: transfer_used_names;
wenzelm
parents: 6891
diff changeset
   787
5820
ff3c82b47603 Proof states and methods.
wenzelm
parents:
diff changeset
   788
end;
8152
ce3387fafebb replaced FIRSTGOAL by FINDGOAL (backtracking!);
wenzelm
parents: 8095
diff changeset
   789
ce3387fafebb replaced FIRSTGOAL by FINDGOAL (backtracking!);
wenzelm
parents: 8095
diff changeset
   790
structure BasicProof: BASIC_PROOF = Proof;
ce3387fafebb replaced FIRSTGOAL by FINDGOAL (backtracking!);
wenzelm
parents: 8095
diff changeset
   791
open BasicProof;