std::type_info

 

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Type support

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ptrdiff_t size_t max_align_t (C++11)     byte (C++17)	nullptr_t (C++11) offsetof NULL
Numeric limits
numeric_limits
C numeric limits interface
Runtime type information
type_info type_index (C++11)	bad_typeid bad_cast

 

std::type_info

Member functions

type_info::~type_info

type_info::operator==type_info::operator!= (until C++20)

type_info::before

type_info::hash_code (C++11)

type_info::name

 

Defined in header <typeinfo>
class type_info;

The class type_info holds implementation-specific information about a type, including the name of the type and means to compare two types for equality or collating order. This is the class returned by the typeid operator.

The type_info class is neither CopyConstructible nor CopyAssignable.

Member functions

(constructor) [deleted]	has neither default nor copy constructors (public member function)
(destructor) [virtual]	the virtual destructor makes type_info a polymorphic class (virtual public member function)
operator= [deleted]	can not be copy-assigned (public member function)
operator==operator!= (removed in C++20)	checks whether the objects refer to the same type (public member function)
before	checks whether the referred type precedes referred type of another type_info object in the implementation defined order, i.e. orders the referred types (public member function)
hash_code (C++11)	returns a value which is identical for the same types (public member function)
name	implementation defined name of the type (public member function)

See also

type_index (C++11)	wrapper around a type_info object, that can be used as index in associative and unordered associative containers (class)
typeid	Queries information of a type, returning a std::type_info object representing the type (built-in operator)