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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/qglobal.h>
#ifndef QFLAGS_H
#define QFLAGS_H
#include <initializer_list>
QT_BEGIN_NAMESPACE
class QDataStream;
class QFlag
{
int i;
public:
Q_DECL_CONSTEXPR inline QFlag(int value) noexcept : i(value) {}
Q_DECL_CONSTEXPR inline operator int() const noexcept { return i; }
#if !defined(Q_CC_MSVC)
// Microsoft Visual Studio has buggy behavior when it comes to
// unsigned enums: even if the enum is unsigned, the enum tags are
// always signed
# if !defined(__LP64__) && !defined(Q_CLANG_QDOC)
Q_DECL_CONSTEXPR inline QFlag(long value) noexcept : i(int(value)) {}
Q_DECL_CONSTEXPR inline QFlag(ulong value) noexcept : i(int(long(value))) {}
# endif
Q_DECL_CONSTEXPR inline QFlag(uint value) noexcept : i(int(value)) {}
Q_DECL_CONSTEXPR inline QFlag(short value) noexcept : i(int(value)) {}
Q_DECL_CONSTEXPR inline QFlag(ushort value) noexcept : i(int(uint(value))) {}
Q_DECL_CONSTEXPR inline operator uint() const noexcept { return uint(i); }
#endif
};
Q_DECLARE_TYPEINFO(QFlag, Q_PRIMITIVE_TYPE);
class QIncompatibleFlag
{
int i;
public:
Q_DECL_CONSTEXPR inline explicit QIncompatibleFlag(int i) noexcept;
Q_DECL_CONSTEXPR inline operator int() const noexcept { return i; }
};
Q_DECLARE_TYPEINFO(QIncompatibleFlag, Q_PRIMITIVE_TYPE);
Q_DECL_CONSTEXPR inline QIncompatibleFlag::QIncompatibleFlag(int value) noexcept : i(value) {}
#ifndef Q_NO_TYPESAFE_FLAGS
template<typename Enum>
class QFlags
{
Q_STATIC_ASSERT_X((sizeof(Enum) <= sizeof(int)),
"QFlags uses an int as storage, so an enum with underlying "
"long long will overflow.");
Q_STATIC_ASSERT_X((std::is_enum<Enum>::value), "QFlags is only usable on enumeration types.");
struct Private;
typedef int (Private::*Zero);
template <typename E> friend QDataStream &operator>>(QDataStream &, QFlags<E> &);
template <typename E> friend QDataStream &operator<<(QDataStream &, QFlags<E>);
public:
#if defined(Q_CC_MSVC) || defined(Q_CLANG_QDOC)
// see above for MSVC
// the definition below is too complex for qdoc
typedef int Int;
#else
typedef typename std::conditional<
std::is_unsigned<typename std::underlying_type<Enum>::type>::value,
unsigned int,
signed int
>::type Int;
#endif
typedef Enum enum_type;
// compiler-generated copy/move ctor/assignment operators are fine!
#ifdef Q_CLANG_QDOC
Q_DECL_CONSTEXPR inline QFlags(const QFlags &other);
Q_DECL_CONSTEXPR inline QFlags &operator=(const QFlags &other);
#endif
Q_DECL_CONSTEXPR inline QFlags(Enum flags) noexcept : i(Int(flags)) {}
Q_DECL_CONSTEXPR inline QFlags(Zero = nullptr) noexcept : i(0) {}
Q_DECL_CONSTEXPR inline QFlags(QFlag flag) noexcept : i(flag) {}
Q_DECL_CONSTEXPR inline QFlags(std::initializer_list<Enum> flags) noexcept
: i(initializer_list_helper(flags.begin(), flags.end())) {}
Q_DECL_RELAXED_CONSTEXPR inline QFlags &operator&=(int mask) noexcept { i &= mask; return *this; }
Q_DECL_RELAXED_CONSTEXPR inline QFlags &operator&=(uint mask) noexcept { i &= mask; return *this; }
Q_DECL_RELAXED_CONSTEXPR inline QFlags &operator&=(Enum mask) noexcept { i &= Int(mask); return *this; }
Q_DECL_RELAXED_CONSTEXPR inline QFlags &operator|=(QFlags other) noexcept { i |= other.i; return *this; }
Q_DECL_RELAXED_CONSTEXPR inline QFlags &operator|=(Enum other) noexcept { i |= Int(other); return *this; }
Q_DECL_RELAXED_CONSTEXPR inline QFlags &operator^=(QFlags other) noexcept { i ^= other.i; return *this; }
Q_DECL_RELAXED_CONSTEXPR inline QFlags &operator^=(Enum other) noexcept { i ^= Int(other); return *this; }
Q_DECL_CONSTEXPR inline operator Int() const noexcept { return i; }
Q_DECL_CONSTEXPR inline QFlags operator|(QFlags other) const noexcept { return QFlags(QFlag(i | other.i)); }
Q_DECL_CONSTEXPR inline QFlags operator|(Enum other) const noexcept { return QFlags(QFlag(i | Int(other))); }
Q_DECL_CONSTEXPR inline QFlags operator^(QFlags other) const noexcept { return QFlags(QFlag(i ^ other.i)); }
Q_DECL_CONSTEXPR inline QFlags operator^(Enum other) const noexcept { return QFlags(QFlag(i ^ Int(other))); }
Q_DECL_CONSTEXPR inline QFlags operator&(int mask) const noexcept { return QFlags(QFlag(i & mask)); }
Q_DECL_CONSTEXPR inline QFlags operator&(uint mask) const noexcept { return QFlags(QFlag(i & mask)); }
Q_DECL_CONSTEXPR inline QFlags operator&(Enum other) const noexcept { return QFlags(QFlag(i & Int(other))); }
Q_DECL_CONSTEXPR inline QFlags operator~() const noexcept { return QFlags(QFlag(~i)); }
Q_DECL_CONSTEXPR inline bool operator!() const noexcept { return !i; }
Q_DECL_CONSTEXPR inline bool testFlag(Enum flag) const noexcept { return (i & Int(flag)) == Int(flag) && (Int(flag) != 0 || i == Int(flag) ); }
Q_DECL_RELAXED_CONSTEXPR inline QFlags &setFlag(Enum flag, bool on = true) noexcept
{
return on ? (*this |= flag) : (*this &= ~Int(flag));
}
private:
Q_DECL_CONSTEXPR static inline Int initializer_list_helper(typename std::initializer_list<Enum>::const_iterator it,
typename std::initializer_list<Enum>::const_iterator end)
noexcept
{
return (it == end ? Int(0) : (Int(*it) | initializer_list_helper(it + 1, end)));
}
Int i;
};
#ifndef Q_MOC_RUN
#define Q_DECLARE_FLAGS(Flags, Enum)\
typedef QFlags<Enum> Flags;
#endif
#define Q_DECLARE_INCOMPATIBLE_FLAGS(Flags) \
Q_DECL_CONSTEXPR inline QIncompatibleFlag operator|(Flags::enum_type f1, int f2) noexcept \
{ 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) noexcept \
{ 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) noexcept \
{ return f2 | f1; } Q_DECLARE_INCOMPATIBLE_FLAGS(Flags)
#else /* Q_NO_TYPESAFE_FLAGS */
#ifndef Q_MOC_RUN
#define Q_DECLARE_FLAGS(Flags, Enum)\
typedef uint Flags;
#endif
#define Q_DECLARE_OPERATORS_FOR_FLAGS(Flags)
#endif /* Q_NO_TYPESAFE_FLAGS */
QT_END_NAMESPACE
#endif // QFLAGS_H
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