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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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-3.0.html.
**
****************************************************************************/
#pragma once
#include <cstddef>
#include <iterator>
namespace Utils {
namespace Internal {
template<class Category,
class Type,
typename DistanceType = ptrdiff_t,
typename Pointer = Type *,
typename Reference = Type &>
struct SmallStringIterator
{
using iterator_category = Category;
using value_type = Type;
using difference_type = DistanceType;
using pointer = Pointer;
using reference = Reference;
constexpr SmallStringIterator() noexcept = default;
constexpr SmallStringIterator(Pointer ptr) noexcept
: pointer_(ptr)
{}
constexpr SmallStringIterator operator++() noexcept { return ++pointer_; }
constexpr SmallStringIterator operator++(int) noexcept { return pointer_++; }
constexpr SmallStringIterator operator--() noexcept { return --pointer_; }
constexpr SmallStringIterator operator--(int) noexcept { return pointer_--; }
constexpr SmallStringIterator operator+(DistanceType difference) const noexcept
{
return pointer_ + difference;
}
constexpr SmallStringIterator operator-(DistanceType difference) const noexcept
{
return pointer_ - difference;
}
constexpr SmallStringIterator operator+(std::size_t difference) const noexcept
{
return pointer_ + difference;
}
constexpr SmallStringIterator operator-(std::size_t difference) const noexcept
{
return pointer_ - difference;
}
constexpr DistanceType operator-(SmallStringIterator other) const noexcept
{
return pointer_ - other.data();
}
constexpr SmallStringIterator operator+=(DistanceType difference) noexcept
{
return pointer_ += difference;
}
constexpr SmallStringIterator operator-=(DistanceType difference) noexcept
{
return pointer_ -= difference;
}
constexpr Reference operator*() noexcept { return *pointer_; }
const Reference operator*() const noexcept { return *pointer_; }
constexpr Pointer operator->() noexcept { return pointer_; }
constexpr const Pointer operator->() const noexcept { return pointer_; }
constexpr bool operator==(SmallStringIterator other) const noexcept
{
return pointer_ == other.pointer_;
}
constexpr bool operator!=(SmallStringIterator other) const noexcept
{
return pointer_ != other.pointer_;
}
constexpr bool operator<(SmallStringIterator other) const noexcept
{
return pointer_ < other.pointer_;
}
constexpr Pointer data() noexcept { return pointer_; }
constexpr const Pointer data() const noexcept { return pointer_; }
private:
Pointer pointer_ = nullptr;
};
} // namespace Internal
} // namespace Utils
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