typeinfo
标准库标头<typeinfo>
此标头是类型支撑图书馆。
班
| type_info | contains some type's information, generated by the implementation. This is the class returned by the typeid operator. (class) |
|---|---|
| bad_typeid | exception that is thrown if an argument in a typeid expression is null (class) |
| bad_cast | exception that is thrown by an invalid dynamic_cast expression, i.e. a cast of reference type fails (class) |
简介
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namespace std {
class type_info;
class bad_cast;
class bad_typeid;
}
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类std::type_info
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class type_info {
public:
virtual ~type_info(
bool operator==(const type_info& rhs) const noexcept;
bool operator!=(const type_info& rhs) const noexcept;
bool before(const type_info& rhs) const noexcept;
size_t hash_code() const noexcept;
const char* name() const noexcept;
type_info(const type_info& rhs) = delete; // cannot be copied
type_info& operator=(const type_info& rhs) = delete; // cannot be copied
};
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类std::bad_cast
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class bad_cast : public exception {
public:
bad_cast() noexcept;
bad_cast(const bad_cast&) noexcept;
bad_cast& operator=(const bad_cast&) noexcept;
const char* what() const noexcept override;
};
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类std::bad_typeid
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class bad_typeid : public exception {
public:
bad_typeid() noexcept;
bad_typeid(const bad_typeid&) noexcept;
bad_typeid& operator=(const bad_typeid&) noexcept;
const char* what() const noexcept override;
};
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