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#pragma once
#include <cassert>
template <typename T, typename TBase>
bool is_a(TBase* t) {
assert(t != nullptr);
return T::IsInstance(t);
}
template <typename T, typename TBase>
bool is_a_nullable(TBase* t) {
if (t) {
return is_a<T, TBase>(t);
} else {
return false;
}
}
template <typename T, typename TBase>
T* dyn_cast(TBase* t) {
assert(t != nullptr);
if (T::IsInstance(t)) {
return static_cast<T*>(t);
} else {
return nullptr;
}
}
template <typename T, typename TBase>
const T* dyn_cast(const TBase* t) {
assert(t != nullptr);
if (T::IsInstance(t)) {
return static_cast<const T*>(t);
} else {
return nullptr;
}
}
template <typename T, typename TBase>
T* dyn_cast_nullable(TBase* t) {
if (!t) return nullptr;
return dyn_cast<T, TBase>(t);
}
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