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68 lines
1.0 KiB
C++
68 lines
1.0 KiB
C++
/* Copyright 2003-2005 ROBLOX Corporation, All Rights Reserved */
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#pragma once
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//#include "Util/SoundWorld.h"
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#include <string>
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namespace RBX {
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// A property that computes and caches its value
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template <class Type, class O>
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class ComputeProp
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{
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private:
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Type val;
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bool dirty;
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O* object;
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typedef Type (O::*GetFunc)();
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GetFunc getFunc;
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public:
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ComputeProp(O* object, GetFunc getFunc) :
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dirty(true),
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object(object),
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getFunc(getFunc)
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{}
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inline Type getValue()
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{
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if (dirty) {
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val = (object->*getFunc)();
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dirty = false;
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}
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return val;
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}
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inline Type getLastComputedValue() const
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{
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RBXASSERT(!dirty);
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return val;
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}
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inline operator Type()
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{
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return getValue();
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}
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inline Type* getValuePointer()
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{
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getValue();
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return &val;
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}
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inline Type& getValueRef()
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{
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getValue();
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return val;
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}
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bool setDirty()
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{
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bool didSomething = !dirty;
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dirty = true;
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return didSomething;
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}
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bool getDirty() const
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{
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return dirty;
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}
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};
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} // namespace RBX
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