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40 lines
878 B
C++
40 lines
878 B
C++
/*
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* Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license, you may redistribute it
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* and/or modify it under version 3 of the License, or (at your option), any later version.
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*/
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#ifndef _PLAYERBOT_LAZYCALCULATEDVALUE_H
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#define _PLAYERBOT_LAZYCALCULATEDVALUE_H
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template <class TValue, class TOwner>
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class LazyCalculatedValue
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{
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public:
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typedef TValue (TOwner::*Calculator)();
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public:
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LazyCalculatedValue(TOwner* owner, Calculator calculator) : calculator(calculator), owner(owner) { Reset(); }
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public:
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TValue GetValue()
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{
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if (!calculated)
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{
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value = (owner->*calculator)();
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calculated = true;
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}
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return value;
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}
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void Reset() { calculated = false; }
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protected:
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Calculator calculator;
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TOwner* owner;
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bool calculated;
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TValue value;
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};
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#endif
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