q20functional.h: transitively include <functional>
We don't want to require users to say #include <functional> #include <q20functional.h> because that would leave duplicated <functional> includes after a mechanical s/q20functional.h/functional/. Mechanical transformation is the major design goal of the qNN namespaces, so fix this before we use the header in ever more places. Pick-to: 6.3 Change-Id: Id258c36a042214f41b737fb7ab60906cc8e76ca6 Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io> Reviewed-by: Andrei Golubev <andrei.golubev@qt.io> Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
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// We mean it.
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//
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#include <functional>
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QT_BEGIN_NAMESPACE
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namespace q20 {
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