source: mainline/uspace/dist/src/sysel/demos/varargs.sy@ 051bc69a

--
-- Copyright (c) 2010 Jiri Svoboda
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
--
-- o Redistributions of source code must retain the above copyright
--   notice, this list of conditions and the following disclaimer.
-- o Redistributions in binary form must reproduce the above copyright
--   notice, this list of conditions and the following disclaimer in the
--   documentation and/or other materials provided with the distribution.
-- o The name of the author may not be used to endorse or promote products
--   derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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-- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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-- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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--

class VariadicArgumentsDemo is
        --- Variadic function example.
        --
        -- A variadic function is declared by marking its last argument
        -- with the attribute 'packed'.
        --
        fun Print(args : string[], packed) is
                var i : int;
                var error : bool;

                error = false;
                i = 0;
                while not error do
                        -- This is definitely the wrong way to determine
                        -- array bounds, but until a better one is
                        -- implemented...
                        do
                                Builtin.WriteLine(args[i]);
                        except e : Error.OutOfBounds do
                                error = true;
                        end

                        i = i + 1;
                end
        end

        fun Main() is
                Print("One", "Two", "Three", "Four", "Five");
        end
end