When the reference is assigned to auto

Must show statement ：
auto & a=get();
Otherwise, in the a After local variable area , The cited ontology will also be destructed
At the function that returns the reference ：

// Copying constructions and assignment constructions are prohibited here ：
IniConfigReader(const IniConfigReader& rhs)= delete;
const IniConfigReader& operator=(const IniConfigReader& rhs) = delete;