Move QFunctionPointer typedef to a separate header

Task-number: QTBUG-99313
Task-number: QTBUG-106154
Change-Id: I8c62e5c2c2f80d5ce1d4dce69eebbe7d1ebbfd52
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

src/corelib/CMakeLists.txt

@@ -59,6 +59,7 @@ qt_internal_add_module(Core
         global/qflags.h
         global/qfloat16.cpp global/qfloat16.h
         global/qforeach.h
+        global/qfunctionpointer.h
         global/qglobal.cpp global/qglobal.h global/qglobal_p.h
         global/qglobalstatic.h
         global/qhooks.cpp global/qhooks_p.h

src/corelib/global/qfunctionpointer.h

@@ -0,0 +1,23 @@
+// 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 QFUNCTIONPOINTER_H
+#define QFUNCTIONPOINTER_H
+
+#include <QtCore/qtconfigmacros.h>
+
+#if 0
+#pragma qt_class(QFunctionPointer)
+#endif
+
+#if defined(__cplusplus)
+
+QT_BEGIN_NAMESPACE
+
+typedef void (*QFunctionPointer)();
+
+QT_END_NAMESPACE
+
+#endif // __cplusplus
+
+#endif // QFUNCTIONPOINTER_H

src/corelib/global/qfunctionpointer.qdoc

@@ -0,0 +1,9 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
+
+/*! \typedef QFunctionPointer
+    \relates <QFunctionPointer>
+
+    This is a typedef for \c{void (*)()}, a pointer to a function that takes
+    no arguments and returns void.
+*/

src/corelib/global/qglobal.cpp

@@ -166,13 +166,6 @@ using namespace Qt::StringLiterals;
     \sa <QtAlgorithms>, QSysInfo
 */
 
-/*! \typedef QFunctionPointer
-    \relates <QFunctionPointer>
-
-    This is a typedef for \c{void (*)()}, a pointer to a function that takes
-    no arguments and returns void.
-*/
-
 /*
     Dijkstra's bisection algorithm to find the square root of an integer.
     Deliberately not exported as part of the Qt API, but used in both

src/corelib/global/qglobal.h

@@ -50,11 +50,6 @@ QT_BEGIN_NAMESPACE
 
 #if defined(__cplusplus)
 
-#if 0
-#pragma qt_class(QFunctionPointer)
-#endif
-typedef void (*QFunctionPointer)();
-
 #if !defined(Q_UNIMPLEMENTED)
 #  define Q_UNIMPLEMENTED() qWarning("Unimplemented code.")
 #endif
@@ -92,6 +87,7 @@ QT_END_NAMESPACE
 #include <QtCore/qdarwinhelpers.h>
 #include <QtCore/qexceptionhandling.h>
 #include <QtCore/qforeach.h>
+#include <QtCore/qfunctionpointer.h>
 #include <QtCore/qglobalstatic.h>
 #include <QtCore/qmalloc.h>
 #include <QtCore/qminmax.h>