with

    Ada.Strings.Unbounded;


package Packrat is


    type Result_Status is (Failure, Needs_More, Optional_More, Success);


    Parser_Error : exception;
    Lexer_Error  : exception;


private


    function "+"
           (S : in String)
        return Ada.Strings.Unbounded.Unbounded_String
        renames Ada.Strings.Unbounded.To_Unbounded_String;

    function "-"
           (US : in Ada.Strings.Unbounded.Unbounded_String)
        return String
        renames Ada.Strings.Unbounded.To_String;


end Packrat;