diff options
Diffstat (limited to 'src/corelib/global/qflags.h')
| -rw-r--r-- | src/corelib/global/qflags.h | 91 |
1 files changed, 48 insertions, 43 deletions
diff --git a/src/corelib/global/qflags.h b/src/corelib/global/qflags.h index 7f96d900fb..cc028e0095 100644 --- a/src/corelib/global/qflags.h +++ b/src/corelib/global/qflags.h @@ -1,48 +1,12 @@ -/**************************************************************************** -** -** 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> -#include <QtCore/qcompare_impl.h> +// Copyright (C) 2016 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 QFLAGS_H #define QFLAGS_H +#include <QtCore/qcompare_impl.h> +#include <QtCore/qtypeinfo.h> + #include <initializer_list> QT_BEGIN_NAMESPACE @@ -60,7 +24,7 @@ public: // 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) +# if !defined(__LP64__) && !defined(Q_QDOC) constexpr inline Q_IMPLICIT QFlag(long value) noexcept : i(int(value)) {} constexpr inline Q_IMPLICIT QFlag(ulong value) noexcept : i(int(long(value))) {} # endif @@ -93,7 +57,7 @@ class QFlags static_assert((std::is_enum<Enum>::value), "QFlags is only usable on enumeration types."); public: -#if defined(Q_CC_MSVC) || defined(Q_CLANG_QDOC) +#if defined(Q_CC_MSVC) || defined(Q_QDOC) // see above for MSVC // the definition below is too complex for qdoc typedef int Int; @@ -215,24 +179,37 @@ typedef QFlags<Enum> Flags; // These are opt-in, for backwards compatibility #define QT_DECLARE_TYPESAFE_OPERATORS_FOR_FLAGS_ENUM(Flags) \ +[[maybe_unused]] \ constexpr inline Flags operator~(Flags::enum_type e) noexcept \ { return ~Flags(e); } \ +[[maybe_unused]] \ constexpr inline void operator|(Flags::enum_type f1, int f2) noexcept = delete; #else #define QT_DECLARE_TYPESAFE_OPERATORS_FOR_FLAGS_ENUM(Flags) \ +[[maybe_unused]] \ constexpr inline QIncompatibleFlag operator|(Flags::enum_type f1, int f2) noexcept \ { return QIncompatibleFlag(int(f1) | f2); } #endif #define Q_DECLARE_OPERATORS_FOR_FLAGS(Flags) \ +[[maybe_unused]] \ constexpr inline QFlags<Flags::enum_type> operator|(Flags::enum_type f1, Flags::enum_type f2) noexcept \ { return QFlags<Flags::enum_type>(f1) | f2; } \ +[[maybe_unused]] \ constexpr inline QFlags<Flags::enum_type> operator|(Flags::enum_type f1, QFlags<Flags::enum_type> f2) noexcept \ { return f2 | f1; } \ +[[maybe_unused]] \ constexpr inline QFlags<Flags::enum_type> operator&(Flags::enum_type f1, Flags::enum_type f2) noexcept \ { return QFlags<Flags::enum_type>(f1) & f2; } \ +[[maybe_unused]] \ constexpr inline QFlags<Flags::enum_type> operator&(Flags::enum_type f1, QFlags<Flags::enum_type> f2) noexcept \ { return f2 & f1; } \ +[[maybe_unused]] \ +constexpr inline QFlags<Flags::enum_type> operator^(Flags::enum_type f1, Flags::enum_type f2) noexcept \ +{ return QFlags<Flags::enum_type>(f1) ^ f2; } \ +[[maybe_unused]] \ +constexpr inline QFlags<Flags::enum_type> operator^(Flags::enum_type f1, QFlags<Flags::enum_type> f2) noexcept \ +{ return f2 ^ f1; } \ constexpr inline void operator+(Flags::enum_type f1, Flags::enum_type f2) noexcept = delete; \ constexpr inline void operator+(Flags::enum_type f1, QFlags<Flags::enum_type> f2) noexcept = delete; \ constexpr inline void operator+(int f1, QFlags<Flags::enum_type> f2) noexcept = delete; \ @@ -245,6 +222,34 @@ constexpr inline void operator-(int f1, Flags::enum_type f2) noexcept = delete; constexpr inline void operator-(Flags::enum_type f1, int f2) noexcept = delete; \ QT_DECLARE_TYPESAFE_OPERATORS_FOR_FLAGS_ENUM(Flags) +// restore bit-wise enum-enum operators deprecated in C++20, +// but used in a few places in the API +#if __cplusplus > 201702L // assume compilers don't warn if in C++17 mode + // in C++20 mode, provide user-defined operators to override the deprecated operations: +# define Q_DECLARE_MIXED_ENUM_OPERATOR(op, Ret, LHS, RHS) \ + [[maybe_unused]] \ + constexpr inline Ret operator op (LHS lhs, RHS rhs) noexcept \ + { return static_cast<Ret>(qToUnderlying(lhs) op qToUnderlying(rhs)); } \ + /* end */ +#else + // in C++17 mode, statically-assert that this compiler's result of the + // operation is the same that the C++20 version would produce: +# define Q_DECLARE_MIXED_ENUM_OPERATOR(op, Ret, LHS, RHS) \ + static_assert(std::is_same_v<decltype(std::declval<LHS>() op std::declval<RHS>()), Ret>); +#endif + +#define Q_DECLARE_MIXED_ENUM_OPERATORS(Ret, Flags, Enum) \ + Q_DECLARE_MIXED_ENUM_OPERATOR(|, Ret, Flags, Enum) \ + Q_DECLARE_MIXED_ENUM_OPERATOR(&, Ret, Flags, Enum) \ + Q_DECLARE_MIXED_ENUM_OPERATOR(^, Ret, Flags, Enum) \ + /* end */ + +#define Q_DECLARE_MIXED_ENUM_OPERATORS_SYMMETRIC(Ret, Flags, Enum) \ + Q_DECLARE_MIXED_ENUM_OPERATORS(Ret, Flags, Enum) \ + Q_DECLARE_MIXED_ENUM_OPERATORS(Ret, Enum, Flags) \ + /* end */ + + QT_END_NAMESPACE #endif // QFLAGS_H |