DataMuseum.dk

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    Length: 4933 (0x1345)
    Types: TextFile
    Names: »B«

└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
    └─⟦129cab021⟧ »DATA« 
        └─⟦this⟧ 

TextFile

with Arguments;
with Binary;
with Block_Class;
with Boolean_Class;
with Integer_Class;
with Message;
with Msg_Report;
with More_Value;
with Object;
with Pen_Class;
with Scanner;
with String_Class;
with Turtle_Class;
with Unparse_Report;

package body Value is
    type Node_Structure is
        record  
            Info : Natural range 0 .. 1 := 0;
            Bina : Binary.Node := Binary.Empty_Node;  
            Mova : More_Value.Node := More_Value.Empty_Node;
            Lign : Integer;
        end record;

    procedure Parse (N : in out Node; Error : out Boolean) is
        Failed : Boolean := False;
    begin

        Msg_Report.Information ("I enter in value's parse");

        N := new Node_Structure;

        N.Lign := Scanner.Line_Number;

        Binary.Parse (N.Bina, Failed);  
        if not Failed then  
            if More_Value.Is_First (Scanner.Symbol) then
                N.Info := 1;
                More_Value.Parse (N.Mova, Failed);
            end if;
        end if;

        Msg_Report.Information ("I leave value's parse with failed = " &
                                Boolean'Image (Failed));

        Error := Failed;
    end Parse;


    procedure Unparse (N : Node) is

    begin  
        Binary.Unparse (N.Bina);
        if N.Info = 1 then  
            More_Value.Unparse (N.Mova);
        end if;  
    end Unparse;


    function Is_First (T : Scanner.Token) return Boolean is
        use Scanner;
    begin
        return Binary.Is_First (T);
    end Is_First;


    function Interpret
                (N : Node;
                 Inherited : Object.Reference := Object.Void_Reference;
                 A_Keyword_Mess : Message.Selector := Message.Void_Selector;
                 A_List : Arguments.List := Arguments.Void_Arguments)
                return Object.Reference is

        Result : Object.Reference;
        A_Modify_List : Arguments.List;

        use Object;
    begin

        Msg_Report.Information ("I enter in value's interpret");
        Msg_Report.Set_Line_Number (N.Lign);

        Result := Binary.Interpret (N.Bina);

        Msg_Report.Information ("value inherited object is :");
        Msg_Report.Continue
           ("class = " & Object.Class'Image (Object.The_Class (Inherited)) &
            " ident = " & Integer'Image (Object.Identificator (Inherited)));

        Msg_Report.Information ("Info = " & Integer'Image (N.Info));

        if (Inherited = Object.Void_Reference) then  
            if N.Info = 1 then
                Result := More_Value.Interpret
                             (N.Mova, Result, A_Keyword_Mess, A_List);
            end if;
        else

            A_Modify_List := A_List;
            Arguments.Write (A_Modify_List, Result);



            if N.Info = 1 then  
                Result := More_Value.Interpret (N.Mova, Inherited,
                                                A_Keyword_Mess, A_Modify_List);
            else
                case Object.The_Class (Inherited) is

                    when Object.C_Block =>
                        Msg_Report.Information ("I call block interpret");

                        Result := Block_Class.Send
                                     (Inherited, A_Keyword_Mess, A_Modify_List);


                    when Object.C_Integer =>
                        Msg_Report.Information ("I call integer send");

                        Result := Integer_Class.Send
                                     (Inherited, A_Keyword_Mess, A_Modify_List);


                    when Object.C_Boolean =>
                        Msg_Report.Information ("I call boolean send");

                        Result := Boolean_Class.Send
                                     (Inherited, A_Keyword_Mess, A_Modify_List);


                    when Object.C_String =>
                        Msg_Report.Information ("I call boolean send");

                        Result := String_Class.Send
                                     (Inherited, A_Keyword_Mess, A_Modify_List);


                    when Object.C_Turtle =>
                        Msg_Report.Information ("I call turtle send");
                        Result := Turtle_Class.Send
                                     (Inherited, A_Keyword_Mess, A_Modify_List);


                    when Object.C_Pen =>
                        Msg_Report.Information ("I call pen send");
                        Result := Pen_Class.Send
                                     (Inherited, A_Keyword_Mess, A_Modify_List);


                    when Object.C_Void =>
                        null;

                end case;
            end if;
        end if;

        Msg_Report.Information ("I leave value's interpret with result :");
        Msg_Report.Continue
           ("class = " & Object.Class'Image (Object.The_Class (Result)) &
            " ident = " & Integer'Image (Object.Identificator (Result)));

        return Result;
    end Interpret;

end Value;