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Update sqratLightObj.h

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This commit is contained in:
Sandu Liviu Catalin 2021-04-10 17:19:09 +03:00
parent 3e0280a3c4
commit 34159d1662
1 changed files with 23 additions and 0 deletions
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23
module/Sqrat/sqratLightObj.h
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@ -152,6 +152,29 @@ struct LightObj {
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/// Constructs a LightObj from a C++ instance only if that instance exists. Otherwise, null is beings used.
///
/// \param instance Pointer to a C++ class instance that has been bound already
/// \param v VM that the object will exist in
///
/// \tparam T Type of instance
///
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
template<class T>
explicit LightObj(T* instance, std::nullptr_t, HSQUIRRELVM vm = SqVM()) {
// Preserve the stack state
const StackGuard sg(vm);
// Push the instance on the stack
ClassType<T>::PushInstance(vm, instance, nullptr);
// Attempt to retrieve it
if (SQ_FAILED(sq_getstackobj(vm, -1, &mObj))) {
sq_resetobject(&mObj);
} else {
sq_addref(vm, &mObj);
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/// Constructs a LightObj from a C++ type
///