Add Qt libs and headers

paho-mqtt3as-proxy/Qt/include/QtCore/qswap.h

@@ -0,0 +1,54 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QSWAP_H
+#define QSWAP_H
+
+#include <QtCore/qtconfigmacros.h>
+#include <QtCore/qcompilerdetection.h>
+
+#if 0
+#pragma qt_class(QtSwap)
+#pragma qt_sync_stop_processing
+#endif
+
+QT_BEGIN_NAMESPACE
+
+QT_WARNING_PUSH
+// warning: noexcept-expression evaluates to 'false' because of a call to 'void swap(..., ...)'
+QT_WARNING_DISABLE_GCC("-Wnoexcept")
+
+namespace QtPrivate
+{
+namespace SwapExceptionTester { // insulate users from the "using std::swap" below
+    using std::swap; // import std::swap
+    template <typename T>
+    void checkSwap(T &t)
+        noexcept(noexcept(swap(t, t)));
+    // declared, but not implemented (only to be used in unevaluated contexts (noexcept operator))
+}
+} // namespace QtPrivate
+
+// Documented in ../tools/qalgorithm.qdoc
+template <typename T>
+constexpr void qSwap(T &value1, T &value2)
+    noexcept(noexcept(QtPrivate::SwapExceptionTester::checkSwap(value1)))
+{
+    using std::swap;
+    swap(value1, value2);
+}
+
+// pure compile-time micro-optimization for our own headers, so not documented:
+template <typename T>
+constexpr inline void qt_ptr_swap(T* &lhs, T* &rhs) noexcept
+{
+    T *tmp = lhs;
+    lhs = rhs;
+    rhs = tmp;
+}
+
+QT_WARNING_POP
+
+QT_END_NAMESPACE
+
+#endif // QSWAP_H