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Standard library header <typeinfo>

From cppreference.net
C++
Standard library headers

This header is part of the type support library.

Contents

Classes

contains some type’s information, the class returned by the typeid operator
(class)
exception that is thrown if an argument in a typeid expression is null
(class)
exception that is thrown by an invalid dynamic_cast expression, i.e. a cast of reference type fails
(class)

Synopsis 

// all freestanding
namespace std {
  class type_info;
  class bad_cast;
  class bad_typeid;
}

Class std::type_info 

namespace std {
  class type_info
  {
  public:
    virtual ~type_info();
    constexpr 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&) = delete;
    type_info& operator=(const type_info&) = delete;
  };
}

Class std::bad_cast 

namespace std {
  class bad_cast : public exception
  {
  public:
    // see description for the specification of the special member functions
    constexpr const char* what() const noexcept override;
  };
}

Class std::bad_typeid 

namespace std {
  class bad_typeid : public exception
  {
  public:
    // see description for the specification of the special member functions
    constexpr const char* what() const noexcept override;
  };
}