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docs: described optional reference binding issues

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Andrzej Krzemienski committed 2014-05-08 21:50:41 +02:00
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doc/optional.qbk
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@@ -46,7 +46,7 @@ Distributed under the Boost Software License, Version 1.0.
[section Introduction]
This library can be used to represent 'optional' (or 'nullable') objects and safely pass them by value:
This library can be used to represent 'optional' (or 'nullable') objects that can be safely passed by value:
optional<int> readInt(); // this function may return either an int or a not-an-int