std::type_index::hash_code

 

C++

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Symbols index

External libraries

 

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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_index

Member functions

type_index::type_index

type_index::operator=type_index::operator!=type_index::operator<type_index::operator<=type_index::operator>type_index::operator>=type_index::operator<=> (until C++20)(C++20)

type_index::hash_code

type_index::name

Helper classes

hash<std::type_index> (C++11)

 

std::size_t hash_code() const noexcept;		(since C++11)

Returns the hash code of the associated std::type_info object. Equivalent to calling type_info::hash_code directly.

Parameters

(none)

Return value

The hash code of the associated std::type_info object.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 2144	C++11	type_index::hash_code was not required to be noexcept	required

See also

std::hash<std::type_index> (C++11)

hash support for std::type_index (class template specialization)