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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
如标题中所示。 尝试dynamic_cast时出现此错误
无法将'(&obj)-> std :: reference_wrapper <_Tp> :: get()'(类型为'MEPObject'类型)'动态转换为'类MEPGene&'(目标不是指针或对完整类型的引用)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()));
}
}
向前声明还不够。
MEPGene
定义是必需的(以了解继承)。
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