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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_O3TL_TYPED_FLAGS_SET_HXX
#define INCLUDED_O3TL_TYPED_FLAGS_SET_HXX
#include <sal/config.h>
#include <cassert>
#include <type_traits>
namespace o3tl {
template<typename T> struct typed_flags {};
#if defined __GNUC__ && __GNUC__ == 4 && __GNUC_MINOR__ <= 6 && \
!defined __clang__
#define O3TL_STD_UNDERLYING_TYPE_E unsigned int
#else
#define O3TL_STD_UNDERLYING_TYPE_E typename std::underlying_type<E>::type
#endif
/// Mark a (scoped) enumeration as a set of bit flags, with accompanying
/// operations.
///
/// template<>
/// struct o3tl::typed_flags<TheE>: o3tl::is_typed_flags<TheE, TheM> {};
///
/// All relevant values must be non-negative. (Typically, the enumeration's
/// underlying type will either be fixed and unsigned, or it will be unfixed---
/// and can thus default to a signed type---and all enumerators will have non-
/// negative values.)
///
/// \param E the enumeration type.
/// \param M the all-bits-set value for the bit flags.
template<typename E, O3TL_STD_UNDERLYING_TYPE_E M>
struct is_typed_flags {
static_assert(
M >= 0, "is_typed_flags expects only non-negative bit values");
class Self {
public:
explicit Self(O3TL_STD_UNDERLYING_TYPE_E value):
value_(value)
{ assert(value >= 0); }
operator E() { return static_cast<E>(value_); }
#if !defined _MSC_VER || _MSC_VER > 1700
explicit
#endif
operator O3TL_STD_UNDERLYING_TYPE_E() { return value_; }
#if !defined _MSC_VER || _MSC_VER > 1700
explicit
#endif
operator bool() { return value_ != 0; }
private:
O3TL_STD_UNDERLYING_TYPE_E value_;
};
static O3TL_STD_UNDERLYING_TYPE_E const mask = M;
};
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator ~(E rhs) {
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs) >= 0);
return static_cast<typename o3tl::typed_flags<E>::Self>(
o3tl::typed_flags<E>::mask
& ~static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator ~(
typename o3tl::typed_flags<E>::Self rhs)
{
return static_cast<typename o3tl::typed_flags<E>::Self>(
o3tl::typed_flags<E>::mask
& ~static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator &(E lhs, E rhs) {
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs) >= 0);
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs) >= 0);
return static_cast<typename o3tl::typed_flags<E>::Self>(
static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs)
& static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator &(
E lhs, typename o3tl::typed_flags<E>::Self rhs)
{
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs) >= 0);
return static_cast<typename o3tl::typed_flags<E>::Self>(
static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs)
& static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator &(
typename o3tl::typed_flags<E>::Self lhs, E rhs)
{
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs) >= 0);
return static_cast<typename o3tl::typed_flags<E>::Self>(
static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs)
& static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator &(
typename o3tl::typed_flags<E>::Self lhs,
typename o3tl::typed_flags<E>::Self rhs)
{
return static_cast<typename o3tl::typed_flags<E>::Self>(
static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs)
& static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator |(E lhs, E rhs) {
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs) >= 0);
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs) >= 0);
return static_cast<typename o3tl::typed_flags<E>::Self>(
static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs)
| static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator |(
E lhs, typename o3tl::typed_flags<E>::Self rhs)
{
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs) >= 0);
return static_cast<typename o3tl::typed_flags<E>::Self>(
static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs)
| static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator |(
typename o3tl::typed_flags<E>::Self lhs, E rhs)
{
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs) >= 0);
return static_cast<typename o3tl::typed_flags<E>::Self>(
static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs)
| static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline typename o3tl::typed_flags<E>::Self operator |(
typename o3tl::typed_flags<E>::Self lhs,
typename o3tl::typed_flags<E>::Self rhs)
{
return static_cast<typename o3tl::typed_flags<E>::Self>(
static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs)
| static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs));
}
template<typename E>
inline E operator &=(E & lhs, E rhs) {
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs) >= 0);
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs) >= 0);
lhs = lhs & rhs;
return lhs;
}
template<typename E>
inline E operator &=(E & lhs, typename o3tl::typed_flags<E>::Self rhs) {
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs) >= 0);
lhs = lhs & rhs;
return lhs;
}
template<typename E>
inline E operator |=(E & lhs, E rhs) {
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs) >= 0);
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(rhs) >= 0);
lhs = lhs | rhs;
return lhs;
}
template<typename E>
inline E operator |=(E & lhs, typename o3tl::typed_flags<E>::Self rhs) {
assert(static_cast<O3TL_STD_UNDERLYING_TYPE_E>(lhs) >= 0);
lhs = lhs | rhs;
return lhs;
}
#undef O3TL_STD_UNDERLYING_TYPE_E
#endif /* INCLUDED_O3TL_TYPED_FLAGS_SET_HXX */
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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