Move QFlags to qflags.h

This is a verbatim copy of the source code.

Change-Id: I1f7efc75cad1ba05dda31d8ccfd091ae9ae40fd5
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

1 files changed, 139 insertions, 0 deletions

diff --git a/src/corelib/global/qflags.h b/src/corelib/global/qflags.h
new file mode 100644
index 0000000000..7406185520
--- /dev/null
+++ b/src/corelib/global/qflags.h
@@ -0,0 +1,139 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QFLAGS_H
+#define QFLAGS_H
+
+#include <QtCore/qglobal.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+class Q_CORE_EXPORT QFlag
+{
+    int i;
+public:
+    inline QFlag(int i);
+    inline operator int() const { return i; }
+};
+
+inline QFlag::QFlag(int ai) : i(ai) {}
+
+class Q_CORE_EXPORT QIncompatibleFlag
+{
+    int i;
+public:
+    inline explicit QIncompatibleFlag(int i);
+    inline operator int() const { return i; }
+};
+
+inline QIncompatibleFlag::QIncompatibleFlag(int ai) : i(ai) {}
+
+
+#ifndef Q_NO_TYPESAFE_FLAGS
+
+template<typename Enum>
+class QFlags
+{
+    typedef void **Zero;
+    int i;
+public:
+    typedef Enum enum_type;
+    // compiler-generated copy/move ctor/assignment operators are fine!
+#ifdef qdoc
+    inline QFlags(const QFlags &other);
+    inline QFlags &operator=(const QFlags &other);
+#endif
+    Q_DECL_CONSTEXPR inline QFlags(Enum f) : i(f) {}
+    Q_DECL_CONSTEXPR inline QFlags(Zero = 0) : i(0) {}
+    inline QFlags(QFlag f) : i(f) {}
+
+    inline QFlags &operator&=(int mask) { i &= mask; return *this; }
+    inline QFlags &operator&=(uint mask) { i &= mask; return *this; }
+    inline QFlags &operator|=(QFlags f) { i |= f.i; return *this; }
+    inline QFlags &operator|=(Enum f) { i |= f; return *this; }
+    inline QFlags &operator^=(QFlags f) { i ^= f.i; return *this; }
+    inline QFlags &operator^=(Enum f) { i ^= f; return *this; }
+
+    Q_DECL_CONSTEXPR  inline operator int() const { return i; }
+
+    Q_DECL_CONSTEXPR inline QFlags operator|(QFlags f) const { return QFlags(Enum(i | f.i)); }
+    Q_DECL_CONSTEXPR inline QFlags operator|(Enum f) const { return QFlags(Enum(i | f)); }
+    Q_DECL_CONSTEXPR inline QFlags operator^(QFlags f) const { return QFlags(Enum(i ^ f.i)); }
+    Q_DECL_CONSTEXPR inline QFlags operator^(Enum f) const { return QFlags(Enum(i ^ f)); }
+    Q_DECL_CONSTEXPR inline QFlags operator&(int mask) const { return QFlags(Enum(i & mask)); }
+    Q_DECL_CONSTEXPR inline QFlags operator&(uint mask) const { return QFlags(Enum(i & mask)); }
+    Q_DECL_CONSTEXPR inline QFlags operator&(Enum f) const { return QFlags(Enum(i & f)); }
+    Q_DECL_CONSTEXPR inline QFlags operator~() const { return QFlags(Enum(~i)); }
+
+    Q_DECL_CONSTEXPR inline bool operator!() const { return !i; }
+
+    inline bool testFlag(Enum f) const { return (i & f) == f && (f != 0 || i == int(f) ); }
+};
+
+#define Q_DECLARE_FLAGS(Flags, Enum)\
+typedef QFlags<Enum> Flags;
+
+#define Q_DECLARE_INCOMPATIBLE_FLAGS(Flags) \
+inline QIncompatibleFlag operator|(Flags::enum_type f1, int f2) \
+{ return QIncompatibleFlag(int(f1) | f2); }
+
+#define Q_DECLARE_OPERATORS_FOR_FLAGS(Flags) \
+Q_DECL_CONSTEXPR inline QFlags<Flags::enum_type> operator|(Flags::enum_type f1, Flags::enum_type f2) \
+{ return QFlags<Flags::enum_type>(f1) | f2; } \
+Q_DECL_CONSTEXPR inline QFlags<Flags::enum_type> operator|(Flags::enum_type f1, QFlags<Flags::enum_type> f2) \
+{ return f2 | f1; } Q_DECLARE_INCOMPATIBLE_FLAGS(Flags)
+
+
+#else /* Q_NO_TYPESAFE_FLAGS */
+
+#define Q_DECLARE_FLAGS(Flags, Enum)\
+typedef uint Flags;
+#define Q_DECLARE_OPERATORS_FOR_FLAGS(Flags)
+
+#endif /* Q_NO_TYPESAFE_FLAGS */
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif // QFLAGS_H