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

Header: <chrono>

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 and std::hash are enabled.

# Declarations

template< class Rep, class Period >
struct hash<std::chrono::duration<Rep, Period>>;

(since C++26)

# Notes

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

# See also

• hash