cocos-engine-external/sources/acl/core/iterator.h

63 lines
2.1 KiB
C++

#pragma once
////////////////////////////////////////////////////////////////////////////////
// The MIT License (MIT)
//
// Copyright (c) 2019 Nicholas Frechette & Animation Compression Library contributors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
////////////////////////////////////////////////////////////////////////////////
#include "acl/core/impl/compiler_utils.h"
#include <cstdint>
#include <type_traits>
ACL_IMPL_FILE_PRAGMA_PUSH
namespace acl
{
namespace acl_impl
{
template <class item_type, bool is_const>
class iterator_impl
{
public:
typedef typename std::conditional<is_const, const item_type*, item_type*>::type ItemPtr;
constexpr iterator_impl(ItemPtr items, size_t num_items) : m_items(items), m_num_items(num_items) {}
constexpr ItemPtr begin() const { return m_items; }
constexpr ItemPtr end() const { return m_items + m_num_items; }
private:
ItemPtr m_items;
size_t m_num_items;
};
}
template <class item_type>
using iterator = acl_impl::iterator_impl<item_type, false>;
template <class item_type>
using const_iterator = acl_impl::iterator_impl<item_type, true>;
}
ACL_IMPL_FILE_PRAGMA_POP