std::hash<std::chrono::year>
Min standard notice:
Header: <chrono>
The template specialization of std::hash for std::chrono::year allows users to obtain hashes of objects of type std::chrono::year. This specialization is enabled.
# Declarations
template<> struct hash<std::chrono::year>;
(since C++26)
# Notes
Feature-test macro Value Std Feature __cpp_lib_chrono 202306L (C++26) Hashing support for std::chrono value classes