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%
% Copyright (c) ZeroC, Inc. All rights reserved.
%
%
% Singleton used to indicate an unset optional value.
%
classdef UnsetI < handle
methods(Access=private)
function obj = UnsetI()
end
end
methods
function r = eq(obj, other)
r = isequal(obj, other);
end
function r = ne(obj, other)
r = ~isequal(obj, other);
end
end
methods(Static)
function obj = getInstance()
persistent singleton;
if isempty(singleton) || ~isvalid(singleton)
singleton = IceInternal.UnsetI();
end
obj = singleton;
end
end
end
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