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    Length: 2133 (0x855)
    Types: TextFile
    Names: »B«

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

TextFile

with More_Unary;  
with Msg_Report;
with Object;
with Primary;
with Scanner;

package body Unary is
    type Node_Structure is
        record
            Info : Natural range 0 .. 1 := 0;  
            Prim : Primary.Node := Primary.Empty_Node;  
            Moun : More_Unary.Node := More_Unary.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 unary's parse");

        N := new Node_Structure;

        N.Lign := Scanner.Line_Number;

        Primary.Parse (N.Prim, Failed);  
        if not Failed then  
            if More_Unary.Is_First (Scanner.Symbol) then
                N.Info := 1;
                More_Unary.Parse (N.Moun, Failed);
            end if;  
        end if;

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

        Error := Failed;
    end Parse;


    procedure Unparse (N : Node) is

    begin  
        Primary.Unparse (N.Prim);
        if N.Info = 1 then
            More_Unary.Unparse (N.Moun);
        end if;
    end Unparse;


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

    function Interpret (N : Node;
                        Inherited : Object.Reference := Object.Void_Reference)
                       return Object.Reference is
        Result : Object.Reference;
    begin

        Msg_Report.Information ("I enter in unary's interpret");

        Msg_Report.Set_Line_Number (N.Lign);

        Result := Primary.Interpret (N.Prim);
        if N.Info = 1 then
            Result := More_Unary.Interpret (N.Moun, Result);
        end if;

        Msg_Report.Information ("I leave unary'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 Unary;