std::bad_optional_access
Defined in header <optional> | | |
|---|---|---|
class bad_optional_access; | | (since C++17) |
定义要由std::optional::value当访问不包含值的可选对象时。
二次
二次
继承图
成员函数
(constructor) | constructs the exception object (public member function) |
|---|
继承自STD：例外
成员函数
(destructor) virtual | destructs the exception object (virtual public member function of std::exception) |
|---|---|
what virtual | returns an explanatory string (virtual public member function of std::exception) |
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