Standard library header <typeinfo>

This header is part of the type support library.

Classes

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)

Synopsis

namespace std {
  class type_info;
  class bad_cast;
  class bad_typeid;
}

Class std::type_info

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
};

Class std::bad_cast

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;
};

Class std::bad_typeid

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;
};

Language
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Technical Specifications