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DictSlot.mqh
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DictSlot.mqh
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//+------------------------------------------------------------------+
//| EA31337 framework |
//| Copyright 2016-2021, EA31337 Ltd |
//| https://github.com/EA31337 |
//+------------------------------------------------------------------+
/*
* This file is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
// Prevents processing this includes file for the second time.
#ifndef DICT_SLOT_MQH
#define DICT_SLOT_MQH
enum DICT_SLOT_FLAGS { DICT_SLOT_INVALID = 1, DICT_SLOT_HAS_KEY = 2, DICT_SLOT_IS_USED = 4, DICT_SLOT_WAS_USED = 8 };
/**
* Represents a single item in the hash table.
*/
template <typename K, typename V>
class DictSlot {
public:
unsigned char _flags;
K key; // Key used to store value.
V value; // Value stored.
static const DictSlot Invalid;
DictSlot(unsigned char flags = 0) : _flags(flags) {}
bool IsValid() { return !bool(_flags & DICT_SLOT_INVALID); }
bool HasKey() { return bool(_flags & DICT_SLOT_HAS_KEY); }
bool IsUsed() { return bool(_flags & DICT_SLOT_IS_USED); }
bool WasUsed() { return bool(_flags & DICT_SLOT_WAS_USED); }
void SetFlags(unsigned char flags) { _flags = flags; }
void AddFlags(unsigned char flags) { _flags |= flags; }
void RemoveFlags(unsigned char flags) { _flags &= (unsigned char)~flags; }
};
#endif