std:: hash <std::chrono::duration>

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hash <std::chrono::duration>
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Defined in header <chrono>
template < class Rep, class Period >
struct hash < std:: chrono :: duration < Rep, Period >> ;
(since C++26)

The template specialization of std::hash for std::chrono::duration allows users to obtain hashes of objects of type std:: chrono :: duration < Rep, Period > . This specialization is enabled if and only if both std:: hash < Rep > and std:: hash < Period > are enabled.

Notes

Feature-test macro Value Std Feature
__cpp_lib_chrono 202306L (C++26) Hashing support for std::chrono value classes

See also

(C++11)
hash function object
(class template)
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