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[英]Transform std:vector<reference_wrapper<Base>> to std:vector<reference_wrapper<Derived>> Runtime error time: 0 memory: 3412 signal:6
[英]Transform vector of reference wrapper to Base class to vector of reference_wrapper to Derived class cannot dynamic cast
如標題中所示。 嘗試dynamic_cast時出現此錯誤
無法將'(&obj)-> std :: reference_wrapper <_Tp> :: get()'(類型為'MEPObject'類型)'動態轉換為'類MEPGene&'(目標不是指針或對完整類型的引用)基因。 (dynamic_cast(obj.get()));
class MEPObject;
class MEPGene;
typedef std::vector<std::reference_wrapper<MEPObject>> MEPObjects;
typedef std::vector<std::reference_wrapper<MEPGene>> MEPGenes;
void dynamicCast(MEPObjects &objects, MEPGenes &genes)
{
for(const auto &obj: objects)
{
genes.push_back(dynamic_cast<MEPGene&> (obj.get()));
}
}
向前聲明還不夠。
MEPGene
定義是必需的(以了解繼承)。
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