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TextFile

with Fact;
with Null_Action;
use Fact;
generic
    type Rule_Bundles is (<>);
package Generic_Rule_Base is

    type Rule_Id is private;
    No_Rule : constant Rule_Id;

    type Iterator is private;

    function Get (R : Rule_Id) return Rule_Bundles;
    function Firable_On_Facts  return Fact.Collection;
    function Firable_On_Rule   return Rule_Id;

    function Open                  return Iterator;
    function Value  (I : Iterator) return Rule_Id;
    function Next   (I : Iterator) return Iterator;
    function At_End (I : Iterator) return Boolean;

    Illegal_Bundle  : exception;
    Illegal_Rule_Id : exception;
    Overflow        : exception;


    generic
        The_Bundle : Rule_Bundles;

        type Rule_Names is (<>);

        Nothing : Rule_Names := Rule_Names'Last;

        Rule_1    : Rule_Names      := Nothing;
        Premiss_1 : Join_Descriptor := Null_Premiss;
        with procedure Action_1 (On : Fact.Collection) is Null_Action;

        Rule_2    : Rule_Names      := Nothing;
        Premiss_2 : Join_Descriptor := Null_Premiss;
        with procedure Action_2 (On : Fact.Collection) is Null_Action;

        Rule_3    : Rule_Names      := Nothing;
        Premiss_3 : Join_Descriptor := Null_Premiss;
        with procedure Action_3 (On : Fact.Collection) is Null_Action;

        Rule_4    : Rule_Names      := Nothing;
        Premiss_4 : Join_Descriptor := Null_Premiss;
        with procedure Action_4 (On : Fact.Collection) is Null_Action;

        Rule_5    : Rule_Names      := Nothing;
        Premiss_5 : Join_Descriptor := Null_Premiss;
        with procedure Action_5 (On : Fact.Collection) is Null_Action;

    package Generic_Rule_Bundle is
        procedure Do_Action (For_Rule : Rule_Id; On_Facts : Fact.Collection);
    end Generic_Rule_Bundle;

    -- generic
    --     The_Bundle : rule_Bundles;
    --     type Rule_Names is (<>);
    --     with procedure Action_1 (On_Facts : Fact.Collection) is Null_Action;
    --     with procedure Action_2 (On_Facts : Fact.Collection) is Null_Action;
    --     with procedure Action_3 (On_Facts : Fact.Collection) is Null_Action;
    --     with procedure Action_4 (On_Facts : Fact.Collection) is Null_Action;
    --     with procedure Action_5 (On_Facts : Fact.Collection) is Null_Action;
    -- package Handler is
    --     procedure Add (The_Rule : Rule_Names; Premiss : Fact.Join_Descriptor);
    --     procedure Do_Action (For_Rule : Rule_Id; On_Facts : Fact.Collection);
    -- end Handler;
    --
private
    type Rule_Id is
        record  
            Is_Valid   : Boolean := False;
            The_Bundle : Rule_Bundles;
            The_Rule   : Natural;
        end record;

    No_Rule : constant Rule_Id := Rule_Id'(Is_Valid   => False,
                                           The_Bundle => Rule_Bundles'First,
                                           The_Rule   => 0);

    type Iterator is new Natural;
end Generic_Rule_Base;